MPEP § 512 — MPEP § 512
Current through: 2022-07-01

512-Certificate of Mailing or Transmission 
 
 

 
 
 
 
 
 
 
 

 

 
 
 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

 
 
 
 
 

 
 
 
 
 
 
 
 
 
 
 

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 Manual of Patent Examining Procedure 

 Chapter 0500 

 Section 512 
 

 
 
 
 
 
 512 Certificate of Mailing or Transmission [R-01.2024]

 
 37 CFR 1.8 Certificate of mailing or transmission. 

 
 (a) Except in the situations enumerated in paragraph (a)(2) of this
 section or as otherwise expressly excluded in this chapter, correspondence
 required to be filed in the U.S. Patent and Trademark Office within a set period
 of time will be considered as being timely filed if the procedure described in
 this section is followed. The actual date of receipt will be used for all other
 purposes.
 
 (1) Correspondence will be considered as being timely filed
 if:
 
 (i) The correspondence is mailed or transmitted prior to
 expiration of the set period of time by being:
 
 (A) Addressed as set out in §
 1.1(a) and deposited with the U.S. Postal
 Service with sufficient postage as first class mail; or
 

 (B) Transmitted by facsimile to the Patent and
 Trademark Office in accordance with §
 1.6(d) ; or
 

 (C) Transmitted via the USPTO patent electronic
 filing system in accordance with §
 1.6(a)(4) ; and
 

 
 

 (ii) The correspondence includes a certificate for each
 piece of correspondence stating the date of deposit or transmission.
 The person signing the certificate should have reasonable basis to
 expect that the correspondence would be mailed or transmitted on or
 before the date indicated.
 

 
 

 (2) The procedure described in paragraph (a)(1) of this section
 does not apply to, and no benefit will be given to a Certificate of Mailing
 or Transmission on, the following:
 
 (i) Relative to Patents and Patent Applications— 
 (A) The filing of a national patent application
 specification and drawing or other correspondence for the
 purpose of obtaining an application filing date, including a
 request for a continued prosecution application under
 §
 1.53(d) ;
 

 (B) Papers filed in trials before the Patent Trial
 and Appeal Board, which are governed by §
 42.6(b) of this title; 
 

 (C) Papers filed in contested cases before the
 Patent Trial and Appeal Board, which are governed by
 § 41.106(f) 
 of this title;
 

 (D) The filing of an international application for
 patent; 
 

 (E) The filing of correspondence in an international
 application before the U.S. Receiving Office, the U.S.
 International Searching Authority, or the U.S. International
 Preliminary Examining Authority; 
 

 (F) The filing of a copy of the international
 application and the basic national fee necessary to enter the
 national stage, as specified in § 1.495(b) .
 

 (G) The filing of a written
 declaration of abandonment under §
 1.138 ; 
 

 (H) The filing of a submission under
 § 1.217 for
 publication of a redacted copy of an application; 
 

 (I) The filing of a third-party
 submission under § 1.290 ;
 

 (J) The calculation of any period of
 adjustment, as specified in § 1.703(f) ; 
 

 (K) The filing of an international
 design application.
 

 
 

 (ii) [Reserved] 

 (iii) Relative to Disciplinary Proceedings— 
 (A) Correspondence filed in connection with a
 disciplinary proceeding under part 11 of this chapter.
 

 (B) [Reserved]

 
 

 
 

 
 

 (b) In the event that correspondence is considered timely filed by
 being mailed or transmitted in accordance with paragraph (a) of this section, but
 not received in the U.S. Patent and Trademark Office after a reasonable amount of
 time has elapsed from the time of mailing or transmitting of the correspondence,
 or after the application is held to be abandoned, or after the proceeding is
 dismissed or decided with prejudice, or the prosecution of a reexamination
 proceeding is terminated pursuant to § 1.550(d) or
 §
 1.957(b) or limited pursuant to § 1.957(c) ,
 or a requester paper is refused consideration pursuant to § 1.957(a) ,
 the correspondence will be considered timely if the party who forwarded such
 correspondence:
 
 (1) Informs the Office of the previous mailing or transmission
 of the correspondence promptly after becoming aware that the Office has no
 evidence of receipt of the correspondence;
 

 (2) Supplies an additional copy of the previously mailed or
 transmitted correspondence and certificate; and
 

 (3) Includes a statement that attests on a personal knowledge
 basis or to the satisfaction of the Director to the previous timely mailing,
 transmission or submission. If the correspondence was sent by facsimile
 transmission, a copy of the sending unit’s report confirming transmission
 may be used to support this statement. If the correspondence was transmitted
 via the USPTO patent electronic filing system, a copy of an acknowledgment
 receipt generated by the Office electronic filing system confirming
 submission may be used to support this statement.
 

 
 

 (c) The Office may require additional evidence to determine if the
 correspondence was timely filed.
 

 
 

 A suggested format for a Certificate of Mailing and a Certificate of
 Transmission for facsimile transmissions and for transmissions via the USPTO patent
 electronic filing system under 37 CFR 1.8 to be included with the
 correspondence is reproduced below.
 

 
 Certificate of Mailing 
 I hereby certify that this correspondence is being deposited with the
 United States Postal Service with sufficient postage as first class mail in an envelope
 addressed to: 
 

 Commissioner for Patents 
P.O. Box 1450
Alexandria, Virginia 22313-1450

 on ___________. 

 (Date) 

 Typed or printed name of person signing this certificate

 ___________________________________________ 

 Signature________________________________________
 
 

 

 

 
 Certificate of Transmission by Facsimile 
 I hereby certify that this correspondence is being facsimile transmitted
 to the U.S. Patent and Trademark Office (Fax No. (___)___-____) 
 

 on____________. 

 (Date) 

 Typed or printed name of person signing this certificate

 ___________________________________________

 Signature________________________________________
 
 

 

 

 
 Certificate Transmission via USPTO Patent Electronic Filing
 System
 I hereby certify that this correspondence is being transmitted via the
 U.S. Patent and Trademark Office (USPTO) patent electronic filing system to the
 USPTO.
 

 on____________. 

 (Date) 

 Typed or printed name of person signing this certificate

 ___________________________________________

 Signature________________________________________
 
 

 

 

 ¶ 5.02 Format of Certificate of Mailing or Transmission

 The following are suggested formats for either a Certificate of Mailing or Certificate of Transmission under 37 CFR 1.8(a) . The certification may be included with all correspondence concerning this application or proceeding to establish a date
 of mailing or transmission under 37 CFR 1.8(a) . Proper use of this procedure will result in such communication being considered as timely if the established date is within
 the required period for reply. The Certificate should be signed by the individual actually depositing or transmitting the
 correspondence or by an individual who, upon information and belief, expects the correspondence to be mailed or transmitted
 in the normal course of business by another no later than the date indicated.
 

 
 Certificate of Mailing
 I hereby certify that this correspondence is being deposited with the United States Postal Service with sufficient postage
 as first class mail in an envelope addressed to:
 

 Commissioner for Patents
P.O. Box 1450
Alexandria, VA 22313-1450

 on ___________. 

 (Date) 

 Typed or printed name of person signing this certificate:

 _____________________________________________

 Signature: ________________________________________

 

 

 
 Certificate of Transmission by Facsimile
 I hereby certify that this correspondence is being facsimile
 transmitted to the United States Patent and Trademark Office, Fax No. (___)_____ -_________
 on _____________. (Date)
 

 Typed or printed name of person signing this certificate:

 _________________________________________

 Signature: ________________________________________

 

 

 
 Certificate of Transmission via USPTO Patent Electronic Filing
 System
 I hereby certify that this correspondence is being transmitted via the
 U.S. Patent and Trademark Office (USPTO) patent electronic filing system to the USPTO on
 _____________. (Date)
 

 Typed or printed name of person signing this certificate:

 _________________________________________

 Signature: ________________________________________

 Please refer to 37 CFR 1.6(a)(4) , 1.6(d) 
 and 
 1.8(a)(2) for filing limitations concerning transmissions via the
 USPTO patent electronic filing system, facsimile transmissions and mailing, respectively.
 
 

 

 

 

 Under 37
 CFR 1.8 , a person may state on certain papers directed to the Office
 (some exceptions are stated in 37 CFR 1.8 ), the date on which the
 paper will be deposited in the United States Postal Service, transmitted by facsimile or
 transmitted via the USPTO patent electronic filing system. If the date stated is within the
 period for reply, the reply in most instances will be considered to be timely. This is true
 even if the paper does not actually reach the Office until after the end of the period for
 reply. The Certificate of Mailing procedure does not apply to papers mailed in a foreign
 country.
 

 The Certificate of Transmission procedure for both facsimile transmissions
 and transmissions via the USPTO patent electronic filing system, however, also applies to
 papers transmitted to the Office from a foreign country provided that the correspondence
 being transmitted is not prohibited from being transmitted by facsimile or via the USPTO
 patent electronic filing system and is not otherwise precluded from receiving the benefits
 under 37 CFR
 1.8 .
 

 It should be noted, however, that the Office will continue its normal
 practice of stamping the date of receipt (“Office Date” Stamp; see MPEP § 505 ) on all papers
 received through the mail, by facsimile or via the USPTO patent electronic filing system
 except those filed under 37 CFR 1.10 (See MPEP § 513 ). The receipt date stamped on
 all papers will also be the date which is entered on Office records and from which any
 subsequent periods are calculated. For example, 37 CFR 41.37 gives an appellant 2
 months from the receipt date of the notice of appeal to file an appeal brief. If the last
 day to reply to a final Office action was November 10, 2014, and applicant deposited a
 Notice of Appeal with fee in the U.S. mail on November 10, 2014, and so certified, that
 appeal is timely even if it was not received in the U.S. Patent and Trademark Office until
 November 12, 2014. Since the date of receipt of the notice of appeal will be used to
 calculate the time at which the brief is due, the brief was due on January 12, 2015. This
 is 2 months after the date of receipt of the notice of appeal.
 

 37 CFR
 1.8(a)(2)(i)(A) specifically refers to a request for a continued
 prosecution application (CPA) filed under 37 CFR 1.53(d) (available only for
 design applications) as a correspondence filed for the purposes of obtaining an application
 filing date and the procedures and benefit set forth in 37 CFR 1.8(a)(1) are not applicable to
 a request for a CPA. The date on a certificate of mailing or transmission
 ( 37 CFR
 1.8(a) ) of a CPA is not controlling or even relevant. A CPA filed by
 facsimile transmission or via the USPTO patent electronic filing system will
 not be accorded a filing date as of the date on the certificate
 of transmission unless Office records indicate, or applicant otherwise establishes pursuant
 to 37 CFR
 1.6(f) , receipt in the Office of the complete CPA on the date on the
 certificate of transmission and that date is not a Saturday, Sunday, or Federal holiday
 within the District of Columbia (for transmission via the USPTO patent electronic filing
 system, that date can be a Saturday, Sunday, or Federal holiday within the District of
 Columbia).
 

 I. PROCEDURE BY APPLICANT 
 (A) The certification requires a signature. Specifically, if the
 certification appears on a paper that requires a signature, two signatures are
 required, one for the paper and one for the certification. Although not
 specifically required by 37 CFR 1.8 , it is preferred
 that the certificate be signed by the applicant or registered practitioner.
 

 (B) When possible, the certification should appear on a portion of the
 paper being submitted. However, if there is insufficient space to make the
 certification on the same paper, the certification should be on a separate sheet
 securely attached to the paper.
 

 (C) When the certification is presented on a separate sheet, that
 sheet must (1) be signed and (2) fully identify and be securely attached to the
 paper it accompanies. The required identification should include the application
 number and filing date of the application as well as the type of paper being
 filed, e.g., reply to rejection or refusal, Notice of Appeal, etc. An unsigned
 certification will not be considered acceptable.
 
 Moreover, without the proper identifying data, a
 certification presented on a separate sheet will not be considered
 acceptable if there is any question or doubt concerning the connection
 between the sheet and the paper filed.
 

 For submissions by the U.S. Postal Service or facsimile
 transmissions, if the sheet should become detached from the paper and
 thereafter not associated with the appropriate file, evidence that this
 sheet was received in the Office can be supported by submitting a copy of a
 postcard receipt specifically identifying this sheet and the paper and by
 submitting a copy of the sheet as originally mailed. Attention is directed
 to MPEP § 503 relative to the
 use of postcards as receipts. For submissions via the USPTO patent
 electronic filing system, evidence that this sheet was received in the
 Office can be supported by submitting a copy of an electronic
 acknowledgement receipt specifically identifying this sheet and the paper
 and by submitting a copy of the sheet as originally submitted. See
 MPEP §§
 502.05 and 503 .
 

 
 

 (D) In situations wherein the correspondence includes papers for more
 than one application (e.g., a single envelope containing separate papers
 responding to Office actions in different applications) or papers for various
 parts of the Office (e.g., a patent issue fee transmittal form PTOL-85B and an
 assignment), each paper must have its own certification as a part thereof or
 attached thereto.
 
 Although Part B of Form PTOL-85, Notice of Allowance and
 Fee(s) Due, may contain a Certificate of Mailing thereon, a separate
 Certificate of Mailing is required for all papers included with this form,
 including replacement drawings. Checks submitted with the papers do not
 require certification.
 

 
 

 (E) In situations wherein the correspondence includes several papers
 directed to the same area of the Office for the same application (for example, a
 proposed reply under 37 CFR 1.116 and a Notice of
 Appeal), each paper should have its own certification as a part thereof or
 attached thereto.
 

 (F) For the purposes of 37 CFR 1.8(a)(1)(i)(A) , first
 class mail is interpreted as including Priority Mail
 Express ® and “Priority Mail” deposited with the U.S.
 Postal Service.
 

 
 Alternatively, the correspondence may be submitted with a cover or
 transmittal letter that itemizes and properly identifies the papers and on which is
 placed the certificate under 37 CFR 1.8 .
 

 II. USE OF STAMPED CERTIFICATION Some practitioners place the certification language on the first page of
 a paper with an inked stamp. Such a practice is encouraged because the certification is
 not only readily visible but also forms an integral part of the paper.
 

 III. OFFICE PROCEDURE 

 A. Mail Center of the Office of Patent Application Processing The Mail Center of the Office of Patent Application Processing (OPAP)
 will continue to date stamp the actual date of receipt of all papers received by mail
 in the Office. No attempt will be made to retain the envelopes in which the papers
 are received or to indicate on the papers the postal cancellation date
 (postmark).
 

 However, the benefits of 37 CFR 1.8 or 37 CFR 1.10 
 apply only to documents delivered to the Office by the U.S. Postal Service. A number
 of instances have been uncovered where individuals are certifying that documents were
 deposited with the U.S. Postal Service when, in fact, the documents were hand-carried
 or delivered to the Office via commercial couriers, e.g., “Federal Express,” “DHL,”
 “Purolator,” “Air Borne,” or “UPS.” In those instances where documents include a
 Certificate of Mailing under 37 CFR 1.8 or Priority Mail
 Express ® mailing label (commonly used to comply with
 37 CFR
 1.10 ) but were delivered to the Office by other than the U.S.
 Postal Service, (OPAP) personnel are placing a notice indicating that fact on the
 correspondence involved to alert Office personnel that the benefits of
 37 CFR
 1.8 or 37 CFR 1.10 do not apply.
 

 B. Processing Areas When papers are received in a specific location of the Office (e.g.,
 Pre-Grant Publication Division, Office of Data Management, Office of Petitions - see
 MPEP §§
 502 and 502.01 ), the date of receipt in the
 Office is stamped on the papers in accordance with 37 CFR
 1.6(a) .
 

 The date indicated on the Certificate of Mailing or of Transmission
 will be used by the Office only to determine if the paper was deposited in the United
 States Postal Service, transmitted by facsimile or transmitted via the USPTO patent
 electronic filing system within the period for reply. If the paper was actually
 received in the Office within the period for reply, there is no need to refer to the
 Certificate. Note however, that 37 CFR 1.6(a)(3) provides that
 “[c]orrespondence transmitted by facsimile to the Patent and Trademark Office will be
 stamped with the date on which the complete transmission is received in the Patent
 and Trademark Office unless that date is a Saturday, Sunday, or Federal holiday
 within the District of Columbia, in which case the date stamped will be the next
 succeeding day which is not a Saturday, Sunday, or Federal holiday within the
 District of Columbia.” Note further that 37 CFR 1.6(a)(4) provides that
 “[c]orrespondence officially submitted to the Office by way of the USPTO patent
 electronic filing system will be accorded a receipt date, which is the date in
 Eastern Time when the correspondence is received in the Office regardless of whether
 that date is a Saturday, Sunday, or Federal holiday within the District of
 Columbia.
 

 If, however, the paper was received in the U.S. Patent and Trademark
 Office after the end of the period for reply, the paper should be inspected to
 determine if a Certificate of Mailing or of Transmission has been included. Where no
 such Certificate is found, the paper is untimely since applicant did not reply within
 the period for reply. This may result in abandonment of the application or other loss
 of rights.
 

 In those instances where a Certificate of Mailing or of Transmission
 does appear in the paper or a cover letter thereto, a check should be made to
 determine whether the indicated date of deposit or transmission is within the period
 for reply. If the date indicated in the Certificate is after the end of the period
 for reply, the paper is untimely and no notation of the date need be made. Where the
 date indicated on the Certificate is within the period for reply, the paper should be
 considered to be timely filed. A notation should be made adjacent to the Office stamp
 indicating the date of receipt (“Office Date” Stamp) which notes the date stated on
 the Certificate. This notation should be “C of Mail” , “C of Fax” or “C of EFS-Web”
 followed by the date. A paper with a certificate dated November 10, 1997, would be
 noted next to the “Office Date” Stamp “(C of Mail. 11/10/97).”
 

 If the period set for taking an action in the U.S. Patent and
 Trademark Office ends on a Saturday, Sunday, or federal holiday within the District
 of Columbia ( 37 CFR
 1.7 ), the action will be considered to be timely if deposited
 in the United States mail, transmitted by facsimile or transmitted by the USPTO
 patent electronic filing system and certified under 37 CFR 1.8(a) 
 on the next succeeding day which is not a Saturday, Sunday, or a Federal holiday.
 

 It should be noted that the filing of a paper for the purpose of
 obtaining a continuation or division application under 37 CFR 1.53(d) 
 (available only for design applications) is excluded from the Certificate practice
 under 37 CFR
 1.8(a)(2)(i)(A) since it is considered to be the filing of a
 national patent application.
 

 Pursuant to 35 U.S.C. 119(e)(3) , the period
 of pendency of a provisional application is extended to the next succeeding business
 day if the day that is 12 months after the filing date of a provisional application
 falls on a Saturday, Sunday, or Federal holiday within the District of Columbia. See
 also 37
 CFR 1.7(b) . 
 

 No benefit will be given to a Certificate of Mailing or Certificate
 of Facsimile Transmission relative to the filing of a national patent application
 specification and drawing or other correspondence for the purpose of obtaining an
 application filing date. A national patent application specification and drawing or
 other correspondence for the purpose of obtaining a filing date may be filed via the
 USPTO patent electronic filing system. New patent applications filed in accordance
 with 37 CFR
 1.10 will be stamped by the Office with the date of deposit as
 Priority Mail Express ® with the United States Postal
 Service. For example, if a new patent application is deposited as Priority Mail
 Express ® in accordance with 37 CFR 1.10 on
 a Saturday and the United States Postal Service gives it a date of deposit of
 Saturday, the Office will accord and stamp the correspondence with the Saturday date.
 37 CFR
 1.6(a)(2) .
 

 All Certificates of Mailing or Transmission filed in applications
 should be placed in the image file wrappers.
 

 Office personnel receiving a hand-delivered paper from other than
 U.S. Postal Service personnel should inspect the paper to ensure that the benefits of
 37 CFR
 1.8 or Priority Mail Express ® 
 benefits under 37
 CFR 1.10 are not accorded in error. If the paper contains a
 certificate of mailing under 37 CFR 1.8 or Priority Mail
 Express ® mailing label (commonly used to comply with
 37 CFR
 1.10 ), the words “HAND DELIVERED” should be written adjacent to
 the date stamp.
 

 Applicant should be notified in the next Office action when a paper
 containing a Certificate of Mailing has been denied the benefits under
 37 CFR
 1.8 or a paper containing an Priority Mail
 Express ® mailing label (commonly used to comply with
 37 CFR
 1.10 ) is denied benefits under 37 CFR 1.10 by
 including, for example, form paragraph 5.04.
 

 ¶ 5.04 Benefit of Certificate of Mailing Denied

 The [1] filed 
 [2] is not entitled to the benefits of 37 CFR 1. [3] since it was not
 deposited with the U. S. Postal Service for delivery to the U.S. Patent and Trademark Office.
 Therefore, the date of receipt in the U.S. Patent and Trademark Office has been used to
 determine the timeliness of the paper.
 

 Examiner Note:
 
 1. This form paragraph is to be used
 in those situations where correspondence contains a Certificate of Mailing under
 37 CFR
 1.8 or requests the benefit of Priority Mail
 Express ® under 37 CFR 1.10 , but the correspondence
 was not actually deposited with the U. S. Postal Service.
 

 2. In bracket 3, insert --8-- or
 --10--, as appropriate. 
 
 
 

 Misuse of a Certificate of Mailing under 37 CFR 1.8 or
 improperly claiming the benefit of 37 CFR 1.10 which appears to be
 more than a one-time, inadvertent error should be brought to the attention of the
 Office of Enrollment and Discipline. 
 

 IV. ORIGINAL MAILED PAPER NOT DELIVERED Paragraphs (b) and (c) of 37 CFR 1.8 concern the situation
 where a paper containing a Certificate was timely deposited in the U.S. Postal Service,
 transmitted by facsimile or transmitted via the USPTO patent electronic filing system,
 but never received by the U.S. Patent and Trademark Office. In the TCs, all submissions
 under these paragraphs should be forwarded to the Office of Petitions to be considered. 
 

 37 CFR
 1.8(b) permits a party to notify the Office of a previous mailing
 through the U.S. Postal Service, or transmission by facsimile or the USPTO patent
 electronic filing system, of correspondence when a reasonable amount of time has elapsed
 from the time of mailing or transmission of the correspondence. In the event that
 correspondence may be considered timely filed because it was mailed or transmitted in
 accordance with 37 CFR
 1.8(a) , but was not received in the Office after a reasonable
 amount of time has elapsed, (e.g., more than one month from the time the correspondence
 was mailed), applicant is not required to wait until the end of the maximum extendable
 period for reply set in a prior Office action (for the Office to hold the application
 abandoned) before informing the Office of the previously submitted correspondence.
 Applicant may notify the Office of the previous mailing or transmission and supply a
 duplicate copy of the previously mailed or transmitted correspondence and a statement
 attesting on a personal knowledge basis or to the satisfaction of the Director to the
 previous timely mailing or transmission. If the person signing the statement did not
 sign the certificate of mailing or the certificate of transmission, then the person
 signing the statement should explain how they have firsthand knowledge of the previous
 timely mailing or transmission. Such a statement should be filed promptly after the
 person becomes aware that the Office has not received the correspondence.
 

 Before notifying the Office of a previously submitted correspondence
 that appears not to have been received by the Office, applicants are encouraged to check
 the USPTO patent electronic filing system to see if the correspondence has been entered
 into the application file.
 

 [top] 

 

 

 
 

 
 

 

 

 

 
 
 
 501-Filing Papers With the U.S. Patent and Trademark Office 

 502-Depositing Correspondence 
 502.01-Correspondence Transmitted by Facsimile 

 502.02-Correspondence Signature Requirements 

 502.03-Communications via Internet Electronic Mail (email) 

 502.04-Duplicate Copies of Correspondence 

 502.05-Correspondence Transmitted by EFS-Web 

 
 

 503-Application Number and Filing Receipt 

 504-Assignment of Application for Examination 

 505-Date of Receipt Stamp 

 506-Completeness of Original Application 
 506.01-[Reserved] 

 506.02-Review of Refusal To Accord Filing Date 

 
 

 507-Drawing Review in the Office of Patent Application Processing 

 508-Distribution 
 508.01-[Reserved] 

 508.02-Papers Received After Patenting or Abandonment 

 508.03-[Reserved] 

 508.04-Unlocatable Patent or Application Files 

 
 

 509-Payment of Fees 
 509.01-Deposit Accounts 

 509.02-Small Entity Status — Definitions 

 509.03-Claiming Small Entity Status 
 509.03(a)-Duty to Investigate Entitlement to Claim Small Entity Status 

 509.03(b)-Change or Correction of Status 

 
 

 509.04-Micro Entity Status — Definitions 
 509.04(a)-Gross Income Basis for Micro Entity Status 

 509.04(b) -Institution of Higher Education Basis for Micro Entity Status 

 509.04(c) -Parties Who Can Sign the Micro Entity Certification 

 509.04(d) -Continued Obligation to Determine Micro Entity Qualification 

 509.04(e) -Notification of Loss of Entitlement to Micro Entity Status 

 509.04(f) -Correcting Errors in Micro Entity Status 

 
 

 
 

 510-U.S. Patent and Trademark Office Business Hours 

 511-Postal Service Interruptions and Emergencies 

 512-Certificate of Mailing or Transmission 

 513-Deposit as Priority Mail Express® with U.S. Postal Service 

 

 

 
 

 
 
 

 
 

 

 
 
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 03/09/2026 20:49:43