US3902198A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of replacing a body part with expanded porous polytetrafluoroethylene
Assignee: W.L. Gore and Associates Inc
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Filing: 1974-04-02
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Granted: 1975-09-02
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Expires: 1994-04-02
Abstract
Abstract This invention provides an artificial vascular prosthesis suitable for implantation to replace damaged, stenosed, defective, or occluded veins or arteries. The prosthesis comprises a tube of expanded, porous polytetrafluoroethylene possessing a microstructure consisting of nodes interconnected by fibrils. The suitable range of fibrile length for such a prosthesis is 5-1000 microns, with the preferred range being 20100 microns.
Inventors
- 👤 Peter B Cooper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:11
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/12; Y; Y10; Y10S; Y10S128/00; Y10S128/14
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
37 words
The method of replacing a part of the body by a device comprising expanded, porous polytetrafluoroethylene possessing a microstructure consisting of nodes interconnected by fibrils, wherein the length of substantially all of said fibrils exceeds 5 microns.
Claim 2
Independent Claim
37 words
The method of replacing a part of the body by a device comprising expanded, porous polytetrafluoroethylene possessing a microstructure consisting of nodes interconnected by fibrils, wherein the length of substantially all of said fibrils exceeds 5 microns.
Claim 3
Dependent Claim
29 words
The method of claim 1 for replacing a vascular conduit by a tube of expanded, porous polytetrafluoroethylene wherein the length of substantially all of said fibrils exceeds 5 microns.
Claim 4
Dependent Claim
20 words
The method of claim 2 wherein the length of substantially all of said fibrils falls within the range 5-1000 microns.
Claim 5
Dependent Claim
23 words
The method of claim 3 wherein the expanded, porous polytetrafluoroethylene possesses a matrix tensile strength in at least one direction exceeding 7,300 psi.
Claim 6
Dependent Claim
14 words
The method of claim 3 wherein said fibrils are about 20-100 microns in length.
Claim 7
Dependent Claim
14 words
The method of claim 4 wherein said fibrils are about 20-100 microns in length.
References Cited (Backward Citations)
US3094762A
Cited
US3588920A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-01 | 1979-03-03 | 1979-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-01 | 1983-03-03 | 1983-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-01 | 1987-03-03 | 1987-09-02 | $7700.00 | Window Closed / Lapsed |