N OTE : This disposition is nonprecedential. 

# United States **Court of Appeals**  **for the Federal Circuit**

______________________
SANDBOX LOGISTICS LL C, OREN TECHNOLOGIES, LLC, Plaintiffs

- Appellants

v.

PROPPANT EXPRESS INV ESTMENTS LLC,

PROPPANT EXPRESS SOL UTIONS LLC, Defendants

- Appellees

______________________

2019

- 1684

______________________ Appeal from the United States District Court for the Southern District of Texas in No. 4:17

- cv

- 00589, United States District Judge George C. Hank s , Jr.

______________________
Decided: May 18 , 2020

______________________

J OHN C. O'Q UINN , Kirkland & Ellis LLP, Washington, DC, for plaintiffs

- appellants. Also represented by C ALVIN A LEXANDER S HANK , J ASON M. W ILCOX ; G IANNI C UTRI , Chicago, IL.

J ONATHAN S. F RANKLIN , Norton Rose Fulbright US LLP, Washington, DC, for defendants

- appellees. Also represented by S TEPHANIE D E B ROW , Austin, TX; M ARK Case: 19-1684 Document: 53 Page: 1 Filed: 05/18/2020SANDBOX LOGISTICS LL C v. PROPPANT EXPRESS
INVESTMENTS 2

F RANCIS E BERHARD , C HARLES B RUCE W ALKER , J R

. , Houston, TX.

______________________
Before L OURIE , W ALLACH , and H UGHES , Circuit Judges

. W ALLACH , Circuit Judge

. Appellants SandBox Logistics LLC and Oren Technologies, LLC (together, “SandBox”) sued Appellee s Proppant Express Investments LLC and Proppant Express Solutions LLC (together, “PropX”) in the U.S. District Court for theSouthern District of Texas (“District Court”) alleging infringement of claims 2 and 13 of U.S. Patent No. 9,296,518 (“the ’518 patent”), claims 6 and 17 of U.S. Paten t No. 9,403,626 (“the ’626 patent”), claims 1, 3, 7, 8, 16, 18, 19, and 21

– 23 of U.S. Patent No. 9,440,785 (“the ’785 patent”), and claims 4 and 7 of U.S. Patent No. 9,511,929 (“the ’929 patent”) (collectively, “the Asserted Claims”). 1 After a Markman hearing, the District Court issued an o pinion, construing the parties’ disputed claim terms

. S ee Sandbox Logistics LLC v. Grit Energy Sols. LLC , No s

. 3:16

- CV

- 12, 4:17

- CV

- 589, 2018 WL 3344773, at * 2

– 17 (S.D. Tex. July 9, 2018) (Opinion) . T hereafte r , SandBox and PropX stipulated to non

- infringement of the Asserted Claims by PropX ’s accused products (“the Accused Products”) , and the District Court entered a final judgment in favor of PropX. S ee J.A. 1

– 4 (Final Judgment).

SandBox appeals. We have jurisdiction pursuant to 28 U.S.C. § 1295(a)(1). We affirm.

1 SandBox also sued Liberty Oilfield Services LLC

, J.A. 115, which is not a party to this appeal

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B ACKGROUND

I. The ’518

, ’626 , and ’929 Patent s
Entitled “ Proppant Storage Vessel a nd Assembly Thereof,” the ’518

, ’626 , and ’929 patents share a common specification that “ relates to storage containers ” for proppant and “[m] ore particularly,

. . . to storage container assemblies whereby a product in one container can flow to an interior volume of a lower container. ” ’518 patent col. 1 ll. 34

– 37. 2 The ’518, ’626, and ’929 patents explain that “[p]roppant is a material, such as grains of sand, ceramic, or other particulates” used during hydraulic fracturing (or “fracking”) to “prevent

. . . fractures from closing[.]” Id. col. 1 ll. 53

– 54

. 3 The ’518

, ’626 , and ’929 p atents disclose

“ a proppant storage vessel

. . . compris [ing] a container having a first end wall, a second end wall, a first side wall [,] and a second side wall. ” Id. col. 3 ll. 20

– 22; see id . col. 4 l. 48 (“ Eac h of the containers is [an] ocean freight c ontainer. ”). “The container also has a top wall and a bottom wall” and “[a] hatch

. . . formed on the bottom wall” which“is movable between an open position and a closed position.” Id. col. 3 ll. 22

– 26. An “inclined surface” extends from each wall to t he bottom hatch

, i d. col. 3 ll. 26

– 32 , “ to assure that the proppant contained within the [container] is suitably funneled toward the bottom hatch [,]” id. col. 7 ll. 18

– 21. The container may include “support brace[s]” to “structurally enhance the strength of the container

. . . so as to

. . . withstand the weight of the proppant that is

2 Because the ’518

, ’626 , and ’929 patents share a common specification, we cite to only the ’ 518 patent for ease of reference

, unless otherwise specified

. 3 “ Hydraulic fracturing is the propagation of fractions in a rock layer caused by the presence of pressurized fluid[,]

. . . made i n order to release petroleum, natural gas, coal seam gas, or other substances for extraction.” ’518 patent col. 1 ll. 36

– 41. Case: 19-1684 Document: 53 Page: 3 Filed: 05/18/2020SANDBOX LOGISTICS LL C v. PROPPANT EXPRESS
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contained therein.” Id. col. 7 ll. 24

– 44. The ’518

, ’626 , and ’929 p atents disclose that the containers may be “ vertically aligned in a stacked orientation [,]” id

. col. 6 l. 65

, so that proppant “ in one container can flow to an interior volume of a lower container [,] ” id. col. 1 ll. 36

– 37

, and ultimately onto a “ portable conveyer

. . . placed below the bottom hatch ” of the lowermost container

, id. col. 6 l l

. 7

– 8 ; s ee id. col. 4 ll. 2

– 6 (“ The bottom hatch of the second container is aligned with the opening of the first container such that a proppant in the first container can flow through the [bottom] hatch thereof into the interior volume of the first container. ”) ; see also id.

, Figs. 1, 2

. I I . The ’785 Patent

Entitled “ Method of Delivering

, Storing

, Unloading

, and Using Proppant at a Well S ite ,” the ’ 785 patent “ relates to storage containers ” and “[m] ore particularly,

. . . to proppant discharge systems wherein proppant can be discharg ed from the storage container. Additionally, the [’785 patent] relates to a process for providing proppant to a wellsite by the transport and delivery of the proppant containers. ” ’ 785 patent col. 1 ll. 16

– 21. The ’785 patent discloses

“ a container for the transport and storage of proppant

. . . compris [ing] a box having a bottom, a pair of side walls [,] a pair of end walls [,] and a top. ” Id. col. 7 ll. 53

– 55 ; see id. col. 10 ll. 32

– 36 (“[T] he container

. . . is a ten

- foot [ International Organization for Standardization ] container. ”)

. An “inlet [is] formed at or adjacent to the top ” of the box and an “outlet” is formed “ at the bottom. ” Id. col. 7 ll. 56

– 57. A “ramp” extends from each wall to the outlet

, i d. col. 7 ll. 60

– 64 , and “ serve [ s] to funnel [] the proppant that is retained within

. . . the container

. . . toward the outlet [,]” id. col. 10 ll. 44

– 46. The container also includes an “exterior frame” that “provides structural support for the container

. . . and generally surrounds th e exterior of the container” with “ a plurality of vertical bars that extend so as to form a cage

like configuration around the walls [.]” Id. col. 9 l. 64, col. 10 ll. 15

– 20 ; see id. , Figs. 1, 2

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I I I. Procedural History

In February 2017, SandBox sued PropX in the District Court, alleging infringement of the Asserted Claims. J.A. 115. In March 2018, the District Court held a Markman hearing. J.A. 125

– 26. In July 2018, the District Court issued its Opinion, construing, amo ng other terms

, “[t]he term ‘bottom’ in the ’518, ’626, and ’929 patents[,]” Sandbox Logistics , 2018 WL 3344773, at * 4, and “[t]he term ‘structural support members’ in the [’] 785 patent[,]” id. at *15. 4 Thereafter, SandBox and PropX stipulated to non

- infr ingement of the Asserted Claims by the Accused Products and the District Court entered the F inal J udgment in favor of PropX

. S ee J.A. 1

– 4.

D ISCUSSION I. Standard of Review and Legal Standard
“The proper construction of a patent’s claims is an issue of Federal Circuit law[.]” Powell v. Home Depot U.S.A., Inc. , 663 F.3d 1221, 1228 (Fed. Cir. 2011) (citation omitted). “[C]laim construction must begin with the words of the claims themselves.” A mgen Inc. v. Hoechst Marion Roussel, Inc. , 457 F.3d 1293, 1301 (Fed. Cir. 2006) (citationomitted). “[W]ords of a claim are generally given their ordinary and customary meaning,” which is “the meaning

4 The District Court also construed other terms that SandBox raises on appeal. See Sandbox Logistics , 2018 WL 3344773, at *2

– 6 (construing the terms “adjacent” and “top” of the ’626 and ’929 patents), *8

– 10 (construing the
term “ support braces ” of the ’518, ’626, and ’929 patents and the term “ structural supports ” of the ’626 and ’929 patents); see also Appellant’s Br. 15. We ne ed not address the District Court’s construction of these other terms, however,

as we may resolve the issue s on appeal by addressing the terms “bottom” and “structural support members” alone. See infra notes 11 , 1 2

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that the term would have to a person of ordinary skill inthe art [(‘PHOSITA’)] in question at the time of the invention[.]” Phillips v. AWH Corp.

, 415 F.3d 1303, 1312

– 13 (Fed. Cir. 2005) (en banc) (internal quotation marks and citation s omitted). “The words used in the claims are interpreted in light of th e intrinsic evidence of record, including the written description, the drawings, and the prosecution history[.]” Teleflex, Inc. v. Ficosa N. Am. Corp.

, 299 F.3d 1313, 132 4 (Fed. Cir. 2002) (citation omitted). The PHOSITA “is deemed to read the claim term not only in the context of the particular claim in which the disputedterm appears, but in the context of the entire patent, including the specification.” Phillips , 415 F.3d at 1313. 5 The prosecution history may also be looked to in order to supply addi tional evidence of a claim term’s intended meaning. See Home Diagnostics, Inc. v. Lifescan, Inc. , 381 F.3d 1352, 1356 (Fed. Cir. 2004). 6 While courts may also consider extrinsic evidence in claim construction, “such evidence is generally of less signific ance than the intrinsic record.” Wi

LAN, Inc. v. Apple Inc. , 811 F.3d 455, 462 (Fed. Cir. 2016) (citation omitted). 7 “[T]he ultimate construction of a claimterm is a legal question reviewed de novo, [while] underlying factual determinations made by the district court are reviewed for clear error.” Enzo Biochem Inc. v. Applera

5 The specification “includes both th e written description and the claims” of a patent

. In re Packard , 751 F.3d 1307, 1320 n.11 (Fed. Cir. 2014)

. 6 A patent’s pros ecution history “consists of the complete record of the proceedings before the [U.S. Patent and Trademark Office (‘USPTO’) ],” p roviding “evidence of how the [US]PTO and the inventor understood the patent.” Phillips , 415 F.3d at 1317 (citation omitted).

7 “[E]xtrinsic evidence

. . . consists of all evidence external to the patent and prosecution history [

. ] ” Phillips

, 415 F.3d at 1317 (internal quotation marks and citation omitted). Case: 19-1684 Document: 53 Page: 6 Filed: 05/18/2020SANDBOX LOGISTICS LL C v. PROPPANT EXPRESS
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Corp. , 780 F.3d 1149, 1153 (Fed. Cir. 2015) (citation omitted)

. II. The District Court Properly Construed the Term “Bottom” as Recited in the ’ 518, ’626, and ’929 Patents

The District Court concluded that a PHOSITA would understand the “term ‘bottom’ in the ’ 518, ’ 626, and ’ 929 patents

. . . to mean ‘bottom wall [.] ’” Sandbox Logistics

, 2018 WL 3344773, at * 4. Specifically, the District Court “conclude[d] from its review of the specification and prosecution history that a [PHOSITA] would understand that the [containers] used to construct the temporary proppant storage facility are modified standard intermodal shipping containers, which have

. . . bottom walls.” Id. at *6. T hus, the District Court “ conclude [d] that a [PHOSITA] would understand the term [] ‘ bottom ’

. . . to mean ‘ bottom wall [

. ] ’ ” Id. SandBox contends, however, that the District Court’s construction “must be set aside” as “[i]ts rationale

. . . relied entirely on its erroneous understanding that theclaims require an ‘ocean freight container’ and on continuing to read in limitations from the specification.” Appellant’s Br. 68. We disagree with SandBox

. The District Court properly construed the term “ bottom ” as recited in the ’ 518, ’626, and ’929 patents. Consistent with claim construction principles, we look first to the language of the Asserted C laims, followed by the language of the specification and prosecution history. See Phillips , 415 F.3d at 131 4

– 17

. Independent claim 1 of the ’518 patent , from which asserted claims 2 and 13 depend, recites , in relevant part

, “ a container comprising [:] a cavity; sidewalls that define a lateral periphery of the cavity;

. . . inclined surfaces that define a lower periphery of the cavity

. . . ; a bottom;

. . . [and] a hatch positioned closely adjacent to the bottom [.]” ’518 patent col. 8 l. 57

– col. 9 l. 3. Similarly, i ndependent claim 1 of the ’626 patent, from which asserted claim 6 depends, recites a “ con tainer comprising: a top; a bottom, having an outlet formed Case: 19-1684 Document: 53 Page: 7 Filed: 05/18/2020SANDBOX LOGISTICS LL C v. PROPPANT EXPRESS
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therein ; sidewalls coupled to the top and bottom, so as to define an interior volume of the container

. . . ; and a hatch positioned proximate the outlet [

. ] ” ’626 patent col. 8 l. 64

– col. 9 l. 2 5. Independent claim 13 of the ’626 patent, from which asserted claim 17 depends, likewise recites a “ first container having

. . . a first outlet in a first bottom” and a “second container

. . . having a second outlet in a second bottom [.]” Id. col. 11 ll. 4

– 7, 13

– 17. Finally, independentclaim 1 of the ’929 patent, from which asserted claim 4 depends, and independent claim 7 of the ’ 929 patent, both recite, in relevant part, limitations materially identical to those recited in the ’626 patent. See ’929 patent col. 9 ll. 14

– 45, col. 10 ll. 1

– 52.
While the claims do not shed much light on the appropriate construction of “bottom

, ” the claims invariably require that the “bottom” ha s an “outlet” or “hatch” formed therein. Additionally, the juxtaposition of the term s “bottom” and “side wall s” throughout the claims indicates that “bottom” may refer to something other than a wall

. See Phillips , 415 F.3d at 1314 (“Differences among claims

can

. . . be a useful guide in understanding the meaning of particular claim terms.”) ; cf. Fuji Photo Film Co. v. Int’l Trade Comm’n , 386 F.3d 1095, 1104

– 05 (Fed. Cir. 2004) (“The fact that . . . [a] limitation was included in the first step and omitted f rom the second and third steps provides strong textual support for [the] argument that the claim should be construed to distinguish between the first step and the other two.”). Thus, while not dispositive, the claims seem to suggest that “bottom” may refe r to a group of structures other than walls alone.
Turning to the broader specification, s ee Trs. of Columbia Univ. v. Symantec Corp. , 811 F.3d 1359, 1363 (Fed. Cir. 2016) (“[T]he specification is always highly relevant to the claim construction analysis and is, in fact, the single best guide to the meaning of a disputed term.” (internal quotation marks, emphasis, and citation omitted) )

, the ’518

, ’626 , and ’929 patents disclose three embodiments of Case: 19-1684 Document: 53 Page: 8 Filed: 05/18/2020SANDBOX LOGISTICS LL C v. PROPPANT EXPRESS
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the “present invention” each of whi ch explicitly requires containers with a “bottom wall ”: (1) “[t] he present invention is a proppant storage vessel that comprises a container having a first end wall, a second end wall, a first side wall [,] and a second side wall ” as well as “ a top wall an d a bottom wall which serve to define an interior volume therein [,]” ’518 patent col. 3 ll. 20

– 24; (2) “[t] he present invention is also a proppant storage assembly that comprises a first container ” that “ has a bottom wall [with] a bottom hatch affixed ther eto ” and a “ second container ” that “ has [a] bottom hatch formed on a bottom wall thereof [,]” id. col. 3 l

. 62

– col. 4 l. 2; and (3) “ [i] n an alternative embodiment of the present invention, the first container has the first side wall, a second side wall, a first end wall [,] and second end wall hingedly mounted to the bottom wall thereof [,]” id. col. 4 ll. 49

– 52 ; see id. , Abstract (“ A proppant storage vessel has a container having

. . . a bottom wall. ”)

. Thus, the specification makes clear that the invention of the ’518

, ’626

, and ’929 patents includes a “bottom wall .” See Poly

- Am., L.P. v. API Indus., Inc. , 839 F.3d 1131, 1136 (Fed. Cir. 2016) (“ While disavowal must be clear and unequivocal, it need not be explici t. For example, an inventor maydisavow claims lacking a particular feature when the specification describes ‘ the present invention ’ as having that feature. ” (internal citations omitted) ). 8 Indeed, each

8 While the ’518

, ’626 , and ’929 patents provide that the embodiments of the “present invention” are “ not intended, in any way, to limit the scope of the present invention [,]” ’518 col. 4 ll. 55

– 60; see id. col. 8 ll. 48

– 53 (“ Theforegoing disclosure and description of the invention is illustrative and explanatory thereof. ”), such boilerplate language, without more, is not sufficient to overcome the explicit description of the “ present inv ention, ” see D Three Enters

. , LLC v. SunModo Corp. , 890 F.3d 1042, 1051 (Fed. Cir. 2018) (“[B]oilerplate language at the end of the

. . . specification is not sufficient to show adequate disclosure Case: 19-1684 Document: 53 Page: 9 Filed: 05/18/2020SANDBOX LOGISTICS LL C v. PROPPANT EXPRESS
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embodiment disclosed in the ’518

, ’626 , and ’929 pa tents includes a “bottom wall.” See ’518 patent col. 5 ll. 18

– 24 (“[T] he preferred embodiment of the present invention

. . . includes a first container

. . . having

. . . a bottom wall [

. ]”), col. 8 ll. 18

– 23 (“[A]n alternative embodiment of the container

. . . of the present invention

. . . includes

. . . end walls

. . . and

. . . side walls

. . . extending upwardly from a bottom wall [.]”). Thus, while the claims may suggest that “bottom ” refer s to something other than a wall, the broader specification makes clear that “bottom” refers to a “bottom wall.” Cf. Edwards Lifesciences LLC v. Cook Inc. , 582 F.3d 1322, 1332 (Fed. Cir. 2009) (“[C]laim differentiation is a rule of thumb that does not trump the clear import of the specification. ”). 9
The prosecution history supports the conclusion that “bottom” refers to a “bottom wall.” During prosecution of the ’ 518 patent, an examiner twice rejected claims for

“ omitting essential elements [,]” v iz., “[t]he bottom wall on

of the actual combinations and attachments used in the

. . . [c]laims.”); see also IP Innovation, L.L.C. v. Ecollege.com

, 156 F. App’x 317, 321 (Fed. Cir. 2005) ( explaining that “common boiler plate” language did not effective ly disclos e an alternative embodiment to support a broader constru ction of the claim s a t issue than the embodiment described in the specification as the “present invention” ).

9 Moreover, were the “bottom” something other than a wall as SandBox argues, e.g., “a mesh, an open frame, or some other structure[,]” Appellant’s Br. 69, the “bottom”

— against which “[t] he bottom hatch resides

. . . when in the closed position [,]” ’518 patent col. 3 ll. 59

– 61

— would allow proppant to escape the container

, s ee Medrad, Inc. v. MRI Devices Corp. , 401 F.3d 1313, 1319 (Fed. Cir. 2005) (“It is

. . . en tirely proper to consider the functions of an invention in seeking to determine the meaning of particular claim language.”). Case: 19-1684 Document: 53 Page: 10 Filed: 05/18/2020SANDBOX LOGISTICS LL C v. PROPPANT EXPRESS
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which the hatch is mounted

. ” J.A. 1007 (March 2015 Office Action), 1063 (November 2014 Office Action) ( the Examiner explaining that “ [t] he only hatches disclosed are positioned on a flat bottom wall ”). 10 As t he Examiner explaine d

, he “considered [the bottom wall] essential because the specification does not describe a means to connect the hatch to the container without the bottom wall.” J.A. 1007. Sandbox did not challenge the Examiner’s understanding; instead, i n response, SandBox amended the claims of the ’518patent to recite a “bottom[,]” J.A. 575, with SandBox explaining that although the claims “were rejected on the basis [that] they lack essential elements[,]” the claims were “being amended to include a bottom, and that the hatch is positioned closely adjac ent to the bottom [,] ” J.A. 580. The Examiner allow ed the ’518 patent, based at least in part on his understanding that the claims of the ’518 patent were amended to include a “ bottom wall on which the hatch is mounted

. ” J.A. 1007; see J.A. 1025 (Notice o f Allowability) (the Examiner explaining that the prior art “fails to teach or suggest

. . . a bottom[] and a hatch closely adjacent to the bottom”) . SandBox’s failure to challenge the Examiner’s understanding amounts to a disclaimer

. S ee Biogen Idec, In c. v. GlaxoSmithKline LLC , 713 F.3d 1090, 1096 (Fed. Cir. 2013) (“ If an applicant chooses, she can challenge an

10 The prosecution history of the ’518 patent is relevant to the scope of the ’626 and ’929 patents, which matured from continuat ion application s of the ’518 patent. See ’626 patent, Front Page; ’929 patent, Front Page; s e e also Augustine Med., Inc. v. Gaymar Indus., Inc. , 181 F.3d 1291, 1300 (Fed. Cir. 1999) (“[T]he prosecution history of a parent application may limit the scope o f a later application using the same claim term[.]”) ; Jonsson v. Stanley Works , 903 F.2d 812, 818 (Fed. Cir. 1990) ( explaining that the prosecution history of a parent application is relevant to understanding the scope of claims issuing in a continuation a pplication). Case: 19-1684 Document: 53 Page: 11 Filed: 05/18/2020SANDBOX LOGISTICS LL C v. PROPPANT EXPRESS
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examiner ’ s characterization in order to avoid any chancefor disclaimer, but the applicants in this case did not directly challenge the examiner ’ s characterization. ”); TorPharm, Inc. v. Ranbaxy Pharm., Inc. , 336 F.3d 1322, 1330 (Fed. Cir. 2003) (“[I] n ascertaining the scope of an issued patent, the public is entitled to equate an inventor ’ s acquiescence to the examiner ’ s narrow view of patentable subject matter with abandonment of the rest. Such acquiescence may be found where the patentee narrows his or her claims by amendment [.]” (internal citation omitted) ). Thus, the prosecution history confirms that “bottom” refers to a “bottom wall.” Accordingly, the District Court properly construed the term “bottom” as recited in the ’ 518, ’626, and ’929 patents. 11

11 Because every asserted claim of the ’518, ’626, and ’929 patents requires a “bottom[,]” see ’518 patent col. 8 l. 67 ( i ndependent c laim 1 , from which asserted claims 2 and 13 depend ); ’626 patent col. 8 l. 67 ( independent claim 1, from which asserted claim 6 depends ), col. 11 ll. 6

– 7, 17 ( i ndependent c laim 13

, from which asserted claim 17 depends ); ’929 patent col. 9 l. 18 ( i ndependent c laim 1

, from which asserted claim 4 depends ) , col. 10 l l . 6, 28 ( asserted i ndependent c laim 7), a nd because SandBox stipulated that the “Accused Products do not have a ‘bottom wall’

as

. . . is required by the term ‘bottom[,]’” J.A. 2, we need not consider SandBox’s remaining arguments as to the District Court’s construction of other terms of the ’518 , ’626,and ’929 patents to affirm the District Court’s Final Judgment of non

- infringement as to those patents, see Advanced Steel Recovery, LLC v. X

- Body Equip., Inc. , 808 F.3d 1313, 1321 (Fed. Cir. 2015) (“Because we affirm [the district court’s determin ation of] noninfringement, we do not reach [the defendant]’s alternative arguments for affirmance.”). Case: 19-1684 Document: 53 Page: 12 Filed: 05/18/2020SANDBOX LOGISTICS LL C v. PROPPANT EXPRESS
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III. The District Court Properly Construed the Term “St ructural Support Members” as Recited in the ’785 Patent

The District Court concluded that a PHOSITA “would understand the term ‘structural support members’ to refer to structural fortifications to the end walls and sidewalls of an existing ocean freight container that are placed between the container’s end frame members[.]” Sandbox Logistics

, 2018 WL 3344773, at * 15. SandBox contends, however, that “nothing about the term ‘structural support members’ requires that the claims’ containers be ‘ocean freigh t containers.’” Appellant’s Br. 53. Additionally , SandBox argues that “‘structural support members’ does not refersolely to ‘structural fortifications to the end walls and sidewalls’ of a container, much less require adding supports to an existing ocean freight container. ” Id. at 54. Rather, “ theplain and ordinary meaning of ‘structural support members’ includes features in or of the wall itself [, ] e.g., a corrugated surface [] .” Id. (emphasis omitted). We disagree with SandBox.

The District Court properly construed the term “structural support members” as recited in the ’785 patent as“structural fortifications” provided on an “existing” container. Turning first to the language of the Asserted C laims, s ee Phillips , 415 F.3d at 131 4 , i ndependent claim 1 of the ’785 patent, from which asserted claims 3, 7, and 8 depend, recites , in relevant part, “ a plurality of proppant containers

. . . each

. . . having a closed and substantially rectangular upper proppant containing portion, ” as well as

“ a pair of vertically

- extending end walls and a pair of vertically

- extending side walls defining the closed and substantially rectangular upper proppant containing portion, ” and “ a frame including a plurality of structural support members positioned to span the en d walls and the sidewalls between end frame members to enhance support ofthe end walls and the side walls when the proppant container is full of fracking proppant [.]” ’785 patent col. 14 Case: 19-1684 Document: 53 Page: 13 Filed: 05/18/2020SANDBOX LOGISTICS LL C v. PROPPANT EXPRESS
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l. 65

– col. 15 l. 31. Independent claim 16 of the ’785 patent, from which asserted claims 18, 19, and 21

– 23 depend, recites materially identical limitations. See id. col. 18 ll. 27

–64. That the “structural support members” are recited separate ly from the “end walls” and “side walls” implies that the “structural support members” are a structurally distinct component. See Becton, Dickinson & Co. v. Tyco Healthcare Grp., LP , 616 F.3d 1249, 1254 (Fed. Cir. 2010)(“Where a claim lists elements separately, the clear implication of the claim language is that those elements are distinct components of the patented invention.” (internal quotation marks, alteration, and citation omitted)) ; see HTC Corp. v. Cellular Commc’ns Equip., LLC , 701 F. App’x 978, 982 (Fed. Cir. 2017) (“ The strongest evidence for this separation is the claim language itself, which plainly recites two different structures

. . . . The separate naming of two structures in the claim strongly implies that the named entities are not one and the same structure.”). Thus

, the claim language supports the District Cou rt’s construction.
Turning to the broader specification, s ee Trs. of Columbia Univ. , 811 F.3d at 1363

, the ’785 patent discloses that a “ frame

. . . provides structural support for the container

. . . and generally surrounds the exterior of the container. The frame is formed of a plurality of vertical bars that extend so as to form a cage

- like configuration around the walls [

. ] ” ’785 col. 10 ll. 15

– 19

. A s shown in Figures 1 and 2 of the ’785 patent, the “vertical bars,” i.e., “structural support members,” of the disclosed frame are depicted as separate and distinct components vis

- à

- vis the walls, even extending beyond the walls to the bottom of the container

. Id.

, F igs. 1 and 2. Indeed, ea c h embodim ent disclose d in the ’785 patent includes this configuration. Thus, as with independent claims 1 and 16, t he broader specification supports the District Court’s construction.
Finally, during prosecution of the ’785 patent, SandBox disclaimed the constru ction it now proposes, and limited the “structural support members” to a separate and Case: 19-1684 Document: 53 Page: 14 Filed: 05/18/2020SANDBOX LOGISTICS LL C v. PROPPANT EXPRESS
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distinct component. Specifically, in response to a n obviousness rejection over prior art, including U.S. Publication No. 2013/0206415 (“Sheesley”), SandBox distinguished Sheesley by argu ing that the “container

. . . [of Sheesley] is formed from corrugated metal” in which “the corrugated metal structure is an integral part of the sidewalls used to form the structure of the container

. . . . As such, the sidewalls do not i nclude separate, distinct support members as recited by [the] independent [c]laims[.]” J.A. 1268

– 69; see J.A. 1269 (“As shown in F [ig] . 9, the sidewalls are stand

alone components of the container

. . . without any additional support members attached ther eto.”). This is inconsistent with SandBox ’s position on appeal, viz., that the same claim language “broadly encompasses fortificationsmade in the walls themselves, such as internal folds or corrugations that add strength.” Appellant’s Br. 3. SandBox clearly disavowed this subject matter, and cannot be allowed to recaptur e it. See Omega Eng’g, Inc, v. Raytek Corp. , 334 F.3d 1314, 1323 (Fed. Cir. 2003) (“The doctrine of prosecution disclaimer

. . . preclud[es] patentees from recapturing through claim interpretation specific meanings disclaimed during prosecution.”); see al so Aylus Networks, Inc. v. Apple Inc. , 856 F.3d 1353, 1360 (Fed. Cir. 2017) (“Ultimately, the doctrine of prosecution disclaimer ensures that claims are not construed one way in order to obtaintheir allowance and in a different way against accused infring ers.” (internal quotation marks and citation omitted))

. Accordingly, the District Court properly construed the term “structural support members” as recited in the ’785patent as “structural fortifications” provided on an “existing” container. 12

12 Because SandBox “limit[ed] their infringement allegation pertaining to the term ‘structural support members’ in the ’ 785 patent to the horizontal cor rugations in the walls of the Accused Products,” J.A. 3, and because Case: 19-1684 Document: 53 Page: 15 Filed: 05/18/2020SANDBOX LOGISTICS LL C v. PROPPANT EXPRESS
INVESTMENTS 16

C ONCLUSIO N

We have considered SandBox ’s remaining argumentsand find them unpersuasive. Accordingly, the Final Judgment of the U.S. District Court for the Southern District of Texas is

AFFIRMED

“structural support members” cannot include “corrugations in

. . . walls” based on SandBox’s representations during prosecution of the ’785 patent, we need not consider SandBox’s remainin g arguments as to the District Court’s construction of other terms of the ’785 patent to affirm the District Court’s Final Judgment of non

- infringement as to th at patent, see Advanced Steel , 808 F.3d at 1321

. Case: 19-1684 Document: 53 Page: 16 Filed: 05/18/2020