US5098779A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carvable implant material
Assignee: W.L. Gore and Associates Inc
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Filing: 1990-06-25
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Granted: 1992-03-24
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Expires: 2010-06-25
Abstract
Abstract A carvable implant material for use in surgery and especially in plastic and reconstructive surgery is described which comprises porous PTFE having a coating of a stiffening agent intended to stiffen the PTFE in order to render it carvable. This material may thus be carved into a desired shape prior to implantation. The stiffening agent is biodegradable to allow tissue ingrowth to stabilize the location of the implant as the biodegradable stiffening agent is degraded and absorbed by the body.
Inventors
- 👤 Thane L. Kranzler
- 👤 Norman J. Sharber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:09
CPC Classifications
A; A61; A61L; A61L27/00; A61L27/50; A61L27/58; A61L27/28; A61L27/34; A61F; A61F2/00; A61F2/0077; A61F2/02; A61F2/30; A61F2002/30001; A61F2002/30003; A61F2002/3006; A61F2002/30062; A61F2002/30064; Y; Y10; Y10S; Y10S623/00; Y10S623/924; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249955; Y10T428/249958; Y10T428/249978; Y10T428/31504; Y10T428/3154; Y10T428/31544
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
40 words
A porous implant material, carvable at room temperature, comprising porous polytetrafluoroethylene having one or more outer surfaces and interior porous surfaces, and having a coating of a biocompatible biodegradable stiffening agent that renders the porous polytetrafluoroethylene adequately rigid for carving.
Claim 2
Dependent Claim
40 words
A porous implant material, carvable at room temperature, comprising porous polytetrafluoroethylene having one or more outer surfaces and interior porous surfaces, and having a coating of a biocompatible biodegradable stiffening agent that renders the porous polytetrafluoroethylene adequately rigid for carving.
Claim 3
Dependent Claim
20 words
The carvable implant material of claim 1 containing at least about 1% by weight of a biocompatible biodegradable stiffening agent.
Claim 4
Dependent Claim
20 words
The carvable implant material of claim 1 containing at least about 2% by weight of a biocompatible biodegradable stiffening agent.
Claim 5
Dependent Claim
20 words
The carvable implant material of claim 1 containing at least about 3% by weight of a biocompatible biodegradable stiffening agent.
Claim 6
Dependent Claim
20 words
The carvable implant material of claim 1 containing at least about 5% by weight of a biocompatible biodegradable stiffening agent.
Claim 7
Dependent Claim
21 words
The carvable implant material of claim 1 wherein the porous polytetrafluoroethylene is expanded polytetrafluoroethylene having a microstructure of nodes and fibrils.
Claim 8
Dependent Claim
58 words
The carvable implant material of claim 6 having a hardness force measurement of greater than about 0.4 kg when a sample of at least 4 mm thickness is indented for a distance of 1.0 mm by a ball of 3.175 mm diameter at a rate of 10 mm/min in a direction perpendicular to the direction of the fibrils.
Claim 9
Dependent Claim
58 words
The carvable implant material of claim 6 having a hardness force measurement of greater than about 0.6 kg when a sample of at least 4 mm thickness is indented for a distance of 1.0 mm by a ball of 3.175 mm diameter at a rate of 10 mm/min in a direction perpendicular to the direction of the fibrils.
Claim 10
Dependent Claim
58 words
The carvable implant material of claim 6 having a hardness force measurement of greater than about 0.86 kg when a sample of at least 4 mm thickness is indented for a distance of 1.0 mm by a ball of 3.175 mm diameter at a rate of 10 mm/min in a direction perpendicular to the direction of the fibrils.
Claim 11
Dependent Claim
17 words
The carvable implant material of claim 6 wherein the biodegradable stiffening agent is a biologically derived material.
Claim 12
Dependent Claim
14 words
The carvable implant material of claim 6 wherein the biodegradable stiffening agent is albumin.
Claim 13
Dependent Claim
14 words
The carvable implant material of claim 6 wherein the biodegradable stiffening agent is collagen.
Claim 14
Dependent Claim
19 words
The carvable implant material of claim 6 wherein the coating primarily covers the outer surface of the porous polytetrafluoroethylene.
Claim 15
Dependent Claim
23 words
The carvable implant material of claim 6 wherein the coating covers at least part of the interior porous surfaces of the porous polytetrafluoroethylene.
Claim 16
Dependent Claim
18 words
The carvable implant material of claim 6 wherein the stiffening agent is comprised of a synthetic biodegradable material.
Claim 17
Dependent Claim
27 words
The carvable implant material of claim 15 wherein the synthetic biodegradable stiffening agent is selected from the group consisting of polylactic acid, polyglycolic acid, polydioxanone and polycaprolactone.
Claim 18
Dependent Claim
22 words
The carvable implant material of claim 15 wherein the synthetic biodegradable stiffening agent is a copolymer of polylactic acid and polyglycolic acid.
Claim 19
Dependent Claim
32 words
A process of manufacturing the carvable implant material of claim 1 comprising: a) coating the outer surface of the carvable implant material with a liquid stiffening agent, b) drying the stiffening agent.
Claim 20
Dependent Claim
20 words
The process of claim 18 where the stiffening agent is diluted with a solvent before coating the carvable implant material.
Claim 21
Dependent Claim
72 words
A process of manufacturing the carvable implant material of claim 1 comprising: a) diluting the stiffening agent with a solvent to allow the diluted stiffening agent to penetrate the porous structure of the porous polytetrafluoroethylene; b) coating the carvable implant material by a means for coating suitable for allowing the dilute stiffening agent to coat at least part of the interior porous surfaces of the porous polytetrafluoroethylene; c) drying the stiffening agent.
Claim 22
Dependent Claim
21 words
The process of claim 20 wherein the means for coating comprises soaking the carvable implant material in the diluted stiffening agent.
Claim 23
Dependent Claim
20 words
The process of claim 21 wherein the means for coating includes the application of a vacuum to the porous polytetrafluoroethylene.
References Cited (Backward Citations)
US3276448A
Cited
US3272204A
Cited
US3992725A
Cited
US4129470A
Cited
US4385093A
Cited
US4772285A
Cited
US5032445A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-03-24 | 1995-09-23 | 1996-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-03-24 | 1999-09-23 | 2000-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-03-24 | 2003-09-23 | 2004-03-24 | $7700.00 | Window Closed / Lapsed |