Source: http://www.google.com/patents/US8092484?dq=6,108,703
Timestamp: 2017-04-29 21:39:44
Document Index: 411541725

Matched Legal Cases: ['Application No. 60', 'Application No. 60', 'Application No. 60', 'Application No. 60', 'Application No. 60', 'Application No. 60']

Patent US8092484 - Embolus blood clot filter with post delivery actuation - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsA removable blood clot filter includes a number of locator members and anchor members, and a bio-resorbable structure that causes locator members and/or anchor members to deploy to an initial configuration which changes when the bio-resorbable structure is resorbed. The bio-resorbable structure causes...http://www.google.com/patents/US8092484?utm_source=gb-gplus-sharePatent US8092484 - Embolus blood clot filter with post delivery actuationAdvanced Patent SearchTry the new Google Patents, with machine-classified Google Scholar results, and Japanese and South Korean patents.Publication numberUS8092484 B2Publication typeGrantApplication numberUS 12/096,856PCT numberPCT/US2006/062719Publication dateJan 10, 2012Filing dateDec 29, 2006Priority dateDec 30, 2005Fee statusPaidAlso published asCA2633848A1, EP1965727A2, US20090306703, WO2007079407A2, WO2007079407A3Publication number096856, 12096856, PCT/2006/62719, PCT/US/2006/062719, PCT/US/2006/62719, PCT/US/6/062719, PCT/US/6/62719, PCT/US2006/062719, PCT/US2006/62719, PCT/US2006062719, PCT/US200662719, PCT/US6/062719, PCT/US6/62719, PCT/US6062719, PCT/US662719, US 8092484 B2, US 8092484B2, US-B2-8092484, US8092484 B2, US8092484B2InventorsAlexander Germanovich Kashkarov, Andrzej J. CHANDUSZKOOriginal AssigneeC.R. Bard, Inc.Export CitationBiBTeX, EndNote, RefManPatent Citations (52), Non-Patent Citations (2), Referenced by (12), Classifications (13), Legal Events (3) External Links: USPTO, USPTO Assignment, EspacenetEmbolus blood clot filter with post delivery actuation
US 8092484 B2Abstract
This is a National Stage application under 35 U.S.C. 371 of International Application No. PCT/US2006/062719, filed Dec. 29, 2006, which claims the benefit of priority to U.S. Provisional Patent Application No. 60/754,633, filed Dec. 30, 2005 each of which is incorporated by reference in its entirety. This invention is related to the subject matter shown and described in the following: (i) PCT International Application No. PCT/US06/62722, filed Dec. 29, 2006, entitled “Removable Blood Clot Filter with Edge For Cutting Through the Endothelium” and claiming the benefit of priority to U.S. Provisional Patent Application No. 60/754,600, filed Dec. 30, 2005; (ii) PCT International Application No. PCT/US06/62733, filed Dec. 29, 2006, entitled “Embolus Blood Clot Filter Removal System and Method,” and claiming the benefit of priority to U.S. Provisional Patent Application No. 60/754,598, filed Dec. 30, 2005; (iii) PCT International Application No. PCT/US06/62725, filed Dec. 29, 2006, entitled “Embolus Blood Clot Filter Delivery System,” and claiming the benefit of priority to U.S. Provisional Patent Application No. 60/754,636, filed Dec. 30, 2005; (iv) PCT International Application No. PCT/US06/62720, filed Dec. 29, 2006, entitled “Embolus Blood Clot Filter with Floating Filter Basket,” and claiming the benefit of priority to U.S. Provisional Patent Application No. 60/754,599, filed Dec. 30, 2005; and (v) PCT International Application No. PCT/US06/62730, filed Dec. 29, 2006, entitled “Embolus Blood Clot Filter with Bio-Resorbable Coated Filter Members,” and claiming the benefit of priority to U.S. Provisional Patent Application No. 60/754,597, entitled “Embolus Blood Clot Filter with Retainers on Locator Filter Members,” filed Dec. 30, 2005, each of which is hereby incorporated by reference in its entirety.
This invention relates to a filter device that can be placed in a blood vessel to reduce the risk of embolisms and, more particularly to a blood clot filter including post-delivery actuation capability to reduce the potential for damage to the blood vessel.
In recent years, a number of medical devices have been designed which are adapted for compression into a small size to facilitate introduction into a vascular passageway and which are subsequently expandable into contact with the walls of the passageway. These devices include, among others, blood clot filters which expand and are held in position by engagement with the inner wall of a vein, such as the vena cava. Vena cava filters are known in the art as described, for example, in U.S. Pat. Nos. 4,425,908, 5,669,933 and 5,836,968 and European Patent Office publication 0 188 927 A2, which are hereby incorporated by reference in their entirety. Such filters may include structure to anchor the filter in place within the vena cava, such as elongate diverging anchor members with hooked ends that penetrate the vessel wall and positively prevent longitudinal migration in either direction within the vessel. Such filters also may include structure to locate the filter within the blood vessel, such as near or along the centerline of the vessel. Such structure may consist of a number of locator members which press against the walls of the vessel with approximately equal force, thus causing the center of the filter to move to the centerline of the vessel. A filter including anchor members having hooked ends and locator members is disclosed in U.S. Pat. No. 6,258,026, which is hereby incorporated by reference in its entirety. Once the filter is positioned along the centerline, the anchor members can hook into the vessel wall in locations which help to hold the filter along the vessel centerline. Within a few weeks the endothelium layer grows over the anchors and locator members where they contact the wall, further holding the filter in place.
The various embodiments provide a blood filter that changes shape or repositions filter members after installation in a blood vessel. The blood filter may include locator members and anchor members. A bio-resorbable retainer retains locator members in a first configuration after installation in a blood vessel until the retainer is resorbed. After the retainer is resorbed, the locator members change shape to a second configuration. The locator members may be configured, so that when the bio-resorbable retainer retains a portion of the members, the ends of the locators are extended radially. When the filter is inserted in the blood vessel with the locators so extended in the first configuration, the locator members apply pressure against the walls of the blood vessel, which acts to position the filter near the centerline of the blood vessel. After the filter has been in the blood vessel for a period of time, the bio-resorbable retainer is resorbed allowing the locator members to reposition into a second configuration, thereby reducing the force applied to the walls of the blood vessel.
The accompanying drawings, which are incorporated herein and constitute part of this specification, illustrate exemplary embodiments of the invention, and, together with the general description given above and the detailed description given below, explain features of the invention.
A blood filter is a device suitable for placement in a flow of blood flow through a blood vessel, such as the vena cava, to filter out blood clots. As illustrated in FIG. 1, filter 1 may include a hub 2, locator members 30, and anchor members 40 each of which preferably has a hook 43. A number of locator members 30 and anchor members 40 of the filter 1, which are sometimes referred to herein as filter members, are typically disposed approximately equiangularly about the hub 2, forming radial nets which catch and retain blood clots. The filter members can be made from a plurality of elongate wires, which are preferably metal, and more preferably are a super-elastic shape memory alloy, such as, for example, Nitinol. The shape memory alloy can further be defined as preferably having an austenite finish (Af) temperature below body temperature. The wires are held together at the filter trailing end (with respect to the flow of blood through the filter) by hub 2 using a suitable connection technique, such as, for example, welding, laser welding, or plasma welding or being bonded together. Preferably, the wires are plasma welded. As used herein, “wire” refers to any elongated member of narrow cross section, including rods, bars, tubes, ribbon and narrow sections cut from thin plate, and is not intended to limit the scope of the invention to elongated members of circular cross section, cut from wire stock or manufactured according to a particular method of metal forming. Additional details on filter configurations and materials are disclosed in PCT International Application No. PCT/US06/017889, entitled “Removable Embolus Blood Clot Filter,” filed May 9, 2006, which is hereby incorporated by reference in its entirety.
A filter 1 according to the various embodiments may be delivered into a blood vessel of a subject by pushing it through and then out of a catheter positioned within the vein. The filter 1 may be stored in a storage tube in a compressed configuration with the filter members folded down along the centerline so that the filter can be pushed out of the storage tube and into the catheter, such as by a push wire: A filter 1 made from a super-elastic shape memory alloy, such as Nitinol, may be annealed during fabrication to attain a deployed shape (i.e., the memory shape), such as illustrated in FIG. 2, when at an elevated temperature, such as the subject's body temperature, and be elastic enough at lower temperatures to permit folding into a compressed configuration for storage and delivery via a catheter. Further details on the delivery of a blood filter 1 into a vessel are provided in PCT International Application No. PCT/US06/17890, entitled “Embolus Blood Clot Filter and Delivery System,” filed on May 9, 2006, which is hereby incorporated by reference in its entirety.
Materials which bio-resorb in blood and are assimilated by the body (i.e., absorbed) at predictable rates are well known in the medical arts and used in a variety of applications. For example, bio-resorbable sutures and staples are commonly used in surgical procedures to close internal wounds long enough to permit tissues to heal before bio-absorbing away to reduce the potential for foreign object rejection and infections. A number of materials are used for bio-resorbable sutures and may be used for the bio-resorbable structures of the various embodiments. Such materials may be made from natural materials or synthetic polymers. Natural bio-resorbable materials include, but are not limited to, natural collagens, submucosa sheep intestine, plain gut serosa of beef intestine, and collagen beef flexor tendon. Natural absorbable materials prepared from mucosa or submucosa sheep or beef intestines are broken down by enzymatic degradation within the cell. Synthetic bio-resorbable materials include, but are not limited to: Polyglycolic acid Dexon S homopolymer of glycolic acid; Polyglycolic acid Dexon plus homopolymer of glycolic acid coated with poloxamer 188; Polyglycolic acid Dexon II homopolymer of glycolic acid coated with polycaprolate; Polyglactine 910 Vicryl copolymer lactideglycolic acid coated with calcium stearate; Polydioxanone PDS polymer of paradioxanone; Polydioxanone PDS-II modified PDS; Polyglyconate Maxon copolymer of trimethylene carbonate and polyglycolicacid; and, Polyglecaprone 25 Monocryl copolymer of e-caprolactone and glycolide. Synthetic bio-resorbable materials are first hydrolyzed (hydrolytic degradation) and then metabolized by the cell. Once the bio-resorbable material has been degraded by hydrolysis the fragments are phagocytized by the enzymatic action of the cells, metabolized and excreted. The bio-resorbable materials can be configured to be absorbed or degraded from 2 weeks to 2 years. Other materials can include biodegradable polymers such as polylactic acid, i.e., PLA, polyglycolic acid, i.e., PGA, polydioxanone, i.e., PDS, polyhydroxybutyrate, i.e., PHB, polyhydroxyvalerate, i.e., PHV and copolymers or a combination of PHB and PHV (available commercially as Biopol), polycaprolactone (available commercially as Capronor), polyanhydrides (aliphatic polyanhydrides in the back bone or side chains or aromatic polyanhydrides with benzene in the side chain), polyorthoesters, polyaminoacids (e.g., poly-L-lysine, polyglutamic acid), pseudo-polyaminoacids (e.g., with back bone of polyaminoacids altered), polycyanocrylates, or polyphosphazenes. As used herein, the term “bio-resorbable” includes a suitable bio-compatible material, mixture of materials or partial components of materials being degraded into other generally non-toxic materials by an agent present in biological tissue (i.e., being biodegradable via a suitable mechanism, such as, for example, hydrolysis) or being removed by cellular activity (i.e., bioresorption, bioabsorption, or bioresorbable), by bulk or surface degradation (i.e., bioerosion such as, for example, by utilizing a water insoluble polymer that is soluble in water upon contact with biological tissue or fluid), or a combination of one or more of the bio-degradable, bio-erodable, or bio-resorbable materials noted above.
In the embodiment illustrated in FIGS. 1-4, the locator members 30 include a recurved portion 31, extending from the hub 2, which couples to a linear second portion 32 which couples to a linear third portion 34 which couples to a tip portion 35. In alternative embodiments, the linear second portion 32 and the linear third portion 34 may have a single curvilinear portion, and thus these portions are also referred to herein as an extended portion of the locators. Prior to delivery into a blood vessel, such as during assembly of the filter 1 in a storage tube, a bio-resorbable retainer 50 (FIG. 1) may be used to constrain (i.e., bend) the recurved portion 31 of the locator 30 into a first configuration so that the second portion 33 and third portion 34 (together the extended portion) are deployed radially. Due to the recurved shape of the recurved portion 31 and the angles θ1 and θ2 at the joints or bends 32, 36 connecting recurved portion 31 to the second portion 33, and the second portion 33 to the third portion 34, respectively, when the recurved portions are constrained (e.g., wrapped) by the bio-resorbable retainer 50 into the first configuration illustrated in FIG. 1, the tip portions 35 of the locator members 30 are positioned at a greater distance from the centerline of the filter than when the bio-resorbable retainer 50 is removed and the recurved portions 31 return to their normal shape, which is the second configuration illustrated in FIG. 2. The locator members are preferably made of a resilient spring material, such as Nitinol or Eligiloy®, so that the recurved portions 31 preferably provides a spring portion 31 to the locator 30 that can be bent into the constrained (i.e., first) configuration shown in FIGS. 1 and 3 and return to their unconstrained (i.e., second) configuration after the restraint is removed, as shown in FIGS. 2 and 4. The flexible nature of the locator members 30 also permits the members to flex as they press against the vessel walls to apply an even force and avoid damage to the walls.
θ1 About 1° to about 90°
About 10° to about 30°
θ2 About 20° to about 120°
About 20° to about 90°
θ3 About 80° to about 170°
About 90° to about 135°
θ4 About 90° to about 170°
About 150° to about 170°
The feature of increasing radial deployment force at initial implantation can also be applied to other filters. For example, in FIG. 7D, a commercially available filter 100 (OptEase®/TrapEase®) can be provided with a generally conical plug 71 at both ends. During initial deployment, the plugs 71 cause the filter 100 to be oversized (shown by dashed lines in FIG. 7E). Upon resorbtion of plugs 71, the filter reconfigures to a longer, smaller diameter filter 100′ (shown by solid lines). Hence, where the vessel diameter is 28 mm, a filter can be selected to have an initial oversize diameter configuration of about 40 mm with a smaller diameter configuration filter between 28 mm and 40 mm.
θ5a About 1° to about 45°
θ5b About 0° to about 40°
About 5° to about 20°
θ6 About 20° to about 90°
About 30° to about 45°
θ7 About 90° to about 170°
About 110° to about 135°
θ8 About 90° to about 170°
For the locator actuating embodiments described above with reference to FIGS. 1-7B and 8A-8B, any of a number of alternative configurations of anchor members 40 may be employed. For example, a filter 1 may employ anchors similar to those described in U.S. Pat. No. 6,258,026, or in PCT International Application No. PCT/US06/017889, entitled “Removable Embolus Blood Clot Filter,” both of which are hereby incorporated by reference in their entirety. An example of a suitable anchor member will now be described with reference to FIGS. 1 and 2. Each of the plurality of anchor members 40 may be provided with a first anchor segment 41, a portion of which may be disposed within the hub 2, connected to a second anchor segment 42 by a joint or bend (not shown), which may be connected to a third anchor segment 43 via joint or bend 45. The third anchor segment 43 may be connected to a hook 44 via third anchor joint or bend (also not shown). The first anchor segment 41 extends obliquely with respect to axis A. The second anchor segment 42 extends for a length L5 along axis 46 oblique with respect to the axis A over an angle θ9 with respect to the longitudinal axis A. The third anchor segment 43 extends length L6 along axis 47 oblique with respect to the longitudinal axis A over an angle θ10. The anchor joint or bend 45 can be located at a sixth longitudinal distance L7 as measured on an axis generally parallel to the axis A from the terminal surface 12 of the hub 2 and at about one-half the diameter D1 as measured between generally diametrical end points of two anchors 40 on an axis generally orthogonal to the axis A. The thickness of anchor member 40 is nominally T3. Where the anchor member 40 is preferably a wire of circular cross section, the thickness T3 of the anchor 40 may be the diameter of the wire.
In the embodiment illustrated in FIGS. 9-14B, the filter 1 may employ any of a number of alternative shapes of locator members. For example, such a filter may employ locator members similar to those described in U.S. Pat. No. 6,258,026, or in PCT International Application No. PCT/US06/017889, entitled “Removable Embolus Blood Clot Filter,” which are hereby incorporated by reference in their entirety. An example of suitable shapes and dimensions of locator members for this embodiment are provided in FIG. 7B and table 2 herein.
In the foregoing embodiments, the material used for manufacturing the filter members (locators and anchors) may be any suitable bio-compatible flexible material such as, for example, polymer, memory polymer, memory metal, thermal memory material, metal, metal alloy, ceramics, or compressible spring metal such as stainless steel or a suitable plastic. Preferably, the material may be Elgiloy®, and most preferably Nitinol which is a thermal shape memory alloy, which can be super-elastic or linear-elastic in behavior.
Filters according to the various embodiments may be delivered through a catheter or delivery tube to a generally centered position within a body vessel. Suitable delivery systems and methods are described, for example, in U.S. Pat. No. 6,258,026, as well as in PCT International Application No. PCT/US06/17890, entitled “Embolus Blood Clot Filter and Delivery System,” which are hereby incorporated by reference in their entirety.
Patent CitationsCited PatentFiling datePublication dateApplicantTitleUS4425908Oct 22, 1981Jan 17, 1984Beth Israel HospitalBlood clot filterUS4494531Dec 6, 1982Jan 22, 1985Cook, IncorporatedExpandable blood clot filterUS4688553Nov 14, 1985Aug 25, 1987L. G. Medical S.A.Filter, particularly for trapping blood clotsUS4817600 *May 22, 1987Apr 4, 1989Medi-Tech, Inc.Implantable filterUS5108418Oct 10, 1990Apr 28, 1992Lefebvre Jean MarieDevice implanted in a vessel with lateral legs provided with antagonistically oriented teethUS5669933Jul 17, 1996Sep 23, 1997Nitinol Medical Technologies, Inc.Removable embolus blood clot filterUS5709704Nov 30, 1994Jan 20, 1998Boston Scientific CorporationBlood clot filteringUS5776162Jan 3, 1997Jul 7, 1998Nitinol Medical Technologies, Inc.Vessel implantable shape memory appliance with superelastic hinged jointUS5800457Mar 5, 1997Sep 1, 1998Gelbfish; Gary A.Intravascular filter and associated methodologyUS5836968Jul 16, 1997Nov 17, 1998Nitinol Medical Technologies, Inc.Removable embolus blood clot filterUS6007558 *Sep 25, 1998Dec 28, 1999Nitinol Medical Technologies, Inc.Removable embolus blood clot filterUS6080178Sep 28, 1999Jun 27, 2000Meglin; Allen J.Vena cava filterUS6156055Mar 23, 1999Dec 5, 2000Nitinol Medical Technologies Inc.Gripping device for implanting, repositioning or extracting an object within a body vesselUS6176871Oct 14, 1998Jan 23, 2001Focal, Inc.Apparatus and methods for intraluminal photothermoformingUS6193739Aug 4, 1998Feb 27, 2001B. Braun CelsaAssembly comprising a blood filter for temporary or definitive use and a device for implanting it, corresponding filter and method of implanting such a filterUS6258026Jul 26, 1999Jul 10, 2001Nitinol Medical Technologies, Inc.Removable embolus blood clot filter and filter delivery unitUS6267776May 3, 1999Jul 31, 2001O'connell Paul T.Vena cava filter and method for treating pulmonary embolismUS6273900Jan 16, 1998Aug 14, 2001Boston Scientific CorporationBlood clot filteringUS6331183Sep 23, 1999Dec 18, 2001Scimed Life Systems, Inc.Basket filterUS6350277 *Jan 15, 1999Feb 26, 2002Scimed Life Systems, Inc.Stents with temporary retaining bandsUS6436120Jun 27, 2000Aug 20, 2002Allen J. MeglinVena cava filterUS6443972Nov 13, 1998Sep 3, 2002Cordis Europa N.V.Vascular filterUS6468290Jun 5, 2000Oct 22, 2002Scimed Life Systems, Inc.Two-planar vena cava filter with self-centering capabilitiesUS6517559 *May 3, 2000Feb 11, 2003O'connell Paul T.Blood filter and method for treating vascular diseaseUS6540767Feb 8, 2000Apr 1, 2003Scimed Life Systems, Inc.Recoilable thrombosis filtering device and methodUS6589266 *Jul 18, 2001Jul 8, 2003Scimed Life Systems, Inc.Thrombosis filter having a surface treatmentUS6623506Jun 18, 2001Sep 23, 2003Rex Medical, L.PVein filterUS6872217Jan 23, 2003Mar 29, 2005Scimed Life Systems, Inc.Recoilable thrombosis filtering device and methodUS7056286Nov 12, 2003Jun 6, 2006Adrian RavenscroftMedical device anchor and delivery systemUS7699867 *Apr 18, 2005Apr 20, 2010Cook IncorporatedRemovable vena cava filter for reduced trauma in collapsed configurationUS20010003796Dec 1, 2000Jun 14, 2001Dachuan YangHydrophilic lubricity coating for medical devices comprising a hydrophobic top coatUS20010039432Jul 18, 2001Nov 8, 2001Scimed Life Systems, Inc.Thrombosis filter having a surface treatmentUS20030071285Nov 12, 2002Apr 17, 2003Scimed Life Systems, Inc.Intravascular filter retrieval device and methodUS20030074019Sep 25, 2002Apr 17, 2003C.R. Bard, Inc.Temporary vascular filter guide wireUS20030187495Apr 1, 2002Oct 2, 2003Cully Edward H.Endoluminal devices, embolic filters, methods of manufacture and useUS20040073252Mar 31, 2003Apr 15, 2004Mark GoldbergBlood clot filtering systemUS20040186512Mar 2, 2004Sep 23, 2004Elchanan BruckheimerIntravascular devices, retrieval systems, and corresponding methodsUS20040193209Sep 12, 2003Sep 30, 2004Dusan PavcnikRetrievable filterUS20050055045Sep 10, 2003Mar 10, 2005Scimed Life Systems, Inc.Composite medical devicesUS20050085847Mar 6, 2004Apr 21, 2005Galdonik Jason A.Fiber based embolism protection deviceUS20050159771Jan 20, 2004Jul 21, 2005Scimed Life Systems, Inc.Retrievable blood clot filter with retractable anchoring membersUS20050159773Jan 20, 2004Jul 21, 2005Scimed Life Systems, Inc.Expandable retrieval device with dilator tipUS20050163821Feb 10, 2005Jul 28, 2005Hsing-Wen SungDrug-eluting Biodegradable Stent and Delivery MeansUS20050177224Feb 11, 2004Aug 11, 2005Fogarty Thomas J.Vascular fixation device and methodUS20050234503Jun 10, 2005Oct 20, 2005Ravenscroft Adrian CRemoveable embolus blood clot filter and filter delivery unitUS20050277977Jun 10, 2004Dec 15, 2005Thornton Sally CInvertible intravascular filterUS20060025852 *Aug 2, 2004Feb 2, 2006Armstrong Joseph RBioabsorbable self-expanding endolumenal devicesUS20060036279Aug 11, 2004Feb 16, 2006Eidenschink Tracee ESingle wire intravascular filterUS20060095068Nov 3, 2004May 4, 2006Wasdyke Joel MRetrievable vena cava filterEP0188927B1Nov 15, 1985Jul 26, 1989Société dite : L.G. MEDICAL S.A.Filter, especially to arrest blood clotsWO2006124405A2May 9, 2006Nov 23, 2006C.R. Bard Inc.Removable embolus blood clot filterWO2007021340A1May 9, 2006Feb 22, 2007C.R. Bard IncEmbolus blood clot filter and delivery system* Cited by examinerNon-Patent CitationsReference1International Preliminary Report on Patentability and Written Opinion of the International Searching Authority in PCT/US06/62719.2International Search Report, PCT/US2006/062719.Referenced byCiting PatentFiling datePublication dateApplicantTitleUS8702747 *Oct 21, 2011Apr 22, 2014Cook Medical Technologies LlcFemoral removal vena cava filterUS8734480Aug 5, 2011May 27, 2014Merit Medical Systems, Inc.Vascular filterUS8740931Aug 5, 2011Jun 3, 2014Merit Medical Systems, Inc.Vascular filterUS8795318Mar 11, 2010Aug 5, 2014Merit Medical Systems, Inc.Percutaneous retrievable vascular filterUS8940012 *Oct 17, 2011Jan 27, 2015Boston Scientific Scimed, Inc.Intravascular filter with biodegradable force-reducing elementUS9028525Nov 1, 2011May 12, 2015Merit Medical Systems, Inc.Percutaneous retrievable vascular filterUS9345564Mar 15, 2013May 24, 2016Cook Medical Technologies LlcRemovable vena cava filter having primary and secondary strutsUS9452039Feb 22, 2013Sep 27, 2016Merit Medical Systems, Inc.Vascular filterUS20110137335 *Mar 11, 2010Jun 9, 2011Crusader Medical LlcPercutaneous Retrievable Vascular FilterUS20120035647 *Dec 16, 2009Feb 9, 2012Rainer BregullaBody lumen filters with large surface area anchorsUS20120143238 *Oct 17, 2011Jun 7, 2012Boston Scientific Scimed, Inc.Intravascular filter with biodegradable force-reducing elementUS20130103073 *Oct 21, 2011Apr 25, 2013Cook Medical Technologies LlcFemoral removal vena cava filter* Cited by examinerClassifications U.S. Classification606/200International ClassificationA61M29/00Cooperative ClassificationA61F2002/016, A61F2230/0058, A61F2230/005, A61F2230/0078, A61F2230/008, A61F2250/0071, A61F2/01, A61F2250/0031, A61F2250/0029, A61F2210/0004European ClassificationA61F2/01Legal EventsDateCodeEventDescriptionMay 8, 2008ASAssignmentOwner name: C.R. BARD INC., NEW JERSEYFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KASHKAROV, ALEXANDER GERMANOVICH;CHANDUSZKO, ANDRZEJ J.;REEL/FRAME:020921/0286;SIGNING DATES FROM 20060202 TO 20060727Owner name: C.R. BARD INC., NEW JERSEYFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KASHKAROV, ALEXANDER GERMANOVICH;CHANDUSZKO, ANDRZEJ J.;SIGNING DATES FROM 20060202 TO 20060727;REEL/FRAME:020921/0286May 26, 2010ASAssignmentOwner name: C.R. BARD, INC.,NEW JERSEYFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KASHKAROV, ALEXANDER GERMANOVICH;CHANDUSZKO, ANDRZEJ J.;SIGNING DATES FROM 20090729 TO 20090804;REEL/FRAME:024446/0386Owner name: C.R. BARD, INC., NEW JERSEYFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KASHKAROV, ALEXANDER GERMANOVICH;CHANDUSZKO, ANDRZEJ J.;SIGNING DATES FROM 20090729 TO 20090804;REEL/FRAME:024446/0386Jun 24, 2015FPAYFee paymentYear of fee payment: 4RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services