US5645915A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High strength porous PTFE sheet material
Assignee: W.L. Gore and Associates Inc
•
Filing: 1996-03-29
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Granted: 1997-07-08
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Expires: 2016-03-29
Abstract
Abstract A high strength, porous PTFE sheet material having high strength in all directions within the plane of the sheet material. The sheet material has, within the plane of the sheet, a higher minimum tensile strength, matrix tensile strength, secant modulus and matrix secant modulus than previously known porous PTFE sheet materials. The sheet material is a laminate of multiple layers of porous PTFE film, preferably uniaxially expanded film, wherein the orientation of the direction of the fibrils of any layer varies slightly, such as about ten degrees, from the orientation of the fibrils of the adjacent layer. The sheet material is particularly useful as a surgical repair patch and especially as a blood vessel repair patch because of its high strength, flexibility, biocompatibility and very low rate of suture line bleeding.
Inventors
- 👤 Thane L. Kranzler
- 👤 Jon P. Moseley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:45
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/18; A; A61; A61F; A61F2/00; A61F2/0063; A61L; A61L27/00; A61L27/14; A61L27/16; A61L31/00; A61L31/04; A61L31/048; A61F2/0077; A61F2/02; A61F2/04; A61F2/06; A61F2/10; A61F2/105; A61F2/30; A61F2002/30001; A61F2002/30003; A61F2002/30004; A61F2002/30009; A61F2002/30108; A61F2002/30199; A61F2002/30224; A61F2002/30235; A61F2230/00; A61F2230/0063; A61F2230/0069; A61F2250/00; A61F2250/0014; A61F2250/0028; C08J2327/00; C08J2327/02; C08J2327/12; C08J2327/18; Y; Y10; Y10S; Y10S428/00; Y10S428/91; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1376; Y10T428/24; Y10T428/24058; Y10T428/24074; Y10T428/24132; Y10T428/249921; Y10T428/249953; Y10T428/249955; Y10T428/249958; Y10T428/249975; Y10T428/249978; Y10T428/249979; Y10T428/24998; Y10T428/249981; Y10T428/31504; Y10T428/3154
Claims Analysis
Total Claims: 64
Claim 1
Independent Claim
79 words
A high strength, flexible, porous polytetrafluoroethylene sheet material comprised of multiple layers of porous polytetrafluoroethylene laminated together, said layers each having a fibrillar orientation wherein the fibrillar orientation of adjacent layers with respect to each other is at an included angle of less than ninety degrees, said sheet material being capable of assuming the form of a flat plane, and further having a minimum tensile strength in substantially all directions within the flat plane between 32.6 and 97.5 megapascals.
Claim 2
Dependent Claim
79 words
A high strength, flexible, porous polytetrafluoroethylene sheet material comprised of multiple layers of porous polytetrafluoroethylene laminated together, said layers each having a fibrillar orientation wherein the fibrillar orientation of adjacent layers with respect to each other is at an included angle of less than ninety degrees, said sheet material being capable of assuming the form of a flat plane, and further having a minimum tensile strength in substantially all directions within the flat plane between 32.6 and 97.5 megapascals.
Claim 3
Dependent Claim
22 words
A high strength porous polytetrafluoroethylene sheet material according to claim 1 wherein the minimum tensile strength is between 35.5 and 97.5 megapascals.
Claim 4
Dependent Claim
22 words
A high strength porous polytetrafluoroethylene sheet material according to claim 1 wherein the minimum tensile strength is between 35.5 and 97.5 megapascals.
Claim 5
Dependent Claim
22 words
A high strength porous polytetrafluoroethylene sheet material according to claim 1 wherein the minimum tensile strength is between 50.0 and 97.5 megapascals.
Claim 6
Dependent Claim
15 words
A tubular article comprising the high strength porous polytetrafluoroethylene sheet material according to claim 4.
Claim 7
Dependent Claim
16 words
A surgical repair patch comprising the high strength porous polytetrafluoroethylene sheet material according to claim 4.
Claim 8
Dependent Claim
17 words
A blood vessel repair patch comprising the high strength porous polytetrafluoroethylene sheet material according to claim 4.
Claim 9
Dependent Claim
22 words
A high strength porous polytetrafluoroethylene sheet material according to claim 1 wherein the minimum tensile strength is between 70.0 and 97.5 megapascals.
Claim 10
Dependent Claim
22 words
A high strength porous polytetrafluoroethylene sheet material according to claim 1 wherein the minimum tensile strength is between 90.0 and 97.5 megapascals.
Claim 11
Dependent Claim
15 words
A high strength porous polytetrafluoroethylene sheet material according to claim 1 comprising a tubular shape.
Claim 12
Dependent Claim
16 words
A high strength porous polytetrafluoroethylene sheet material according to claim 1 comprising a surgical repair patch.
Claim 13
Dependent Claim
17 words
A high strength porous polytetrafluoroethylene sheet material according to claim 11 comprising a blood vessel repair patch.
Claim 14
Dependent Claim
80 words
A high strength, flexible, porous polytetrafluoroethylene sheet material comprised of multiple layers of porous polytetrafluoroethylene laminated together, said layers each having a fibrillar orientation wherein the fibrillar orientation of adjacent layers with respect to each other is at an included angle of less than ninety degrees, said sheet material being capable of assuming the form of a flat plane, and further having a minimum matrix tensile strength in substantially all directions within the flat plane between 146 and 215.6 megapascals.
Claim 15
Dependent Claim
80 words
A high strength, flexible, porous polytetrafluoroethylene sheet material comprised of multiple layers of porous polytetrafluoroethylene laminated together, said layers each having a fibrillar orientation wherein the fibrillar orientation of adjacent layers with respect to each other is at an included angle of less than ninety degrees, said sheet material being capable of assuming the form of a flat plane, and further having a minimum matrix tensile strength in substantially all directions within the flat plane between 146 and 215.6 megapascals.
Claim 16
Dependent Claim
23 words
A high strength porous polytetrafluoroethylene sheet material according to claim 13 wherein the minimum matrix tensile strength is between 159 and 215.6 megapascals.
Claim 17
Dependent Claim
23 words
A high strength porous polytetrafluoroethylene sheet material according to claim 13 wherein the minimum matrix tensile strength is between 172 and 215.6 megapascals.
Claim 18
Dependent Claim
23 words
A high strength porous polytetrafluoroethylene sheet material according to claim 13 wherein the minimum matrix tensile strength is between 200 and 215.6 megapascals.
Claim 19
Dependent Claim
15 words
A tubular article comprising the high strength porous polytetrafluoroethylene sheet material according to claim 16.
Claim 20
Dependent Claim
16 words
A Surgical repair patch comprising the high strength porous polytetrafluoroethylene sheet material according to claim 16.
Claim 21
Dependent Claim
17 words
A blood vessel repair patch comprising the high strength porous polytetrafluoroethylene sheet material according to claim 16.
Claim 22
Dependent Claim
15 words
A tubular article comprising the high strength porous polytetrafluoroethylene sheet material according to claim 13.
Claim 23
Dependent Claim
16 words
A surgical repair patch comprising the high strength porous polytetrafluoroethylene sheet material according to claim 13.
Claim 24
Dependent Claim
17 words
A blood vessel repair patch comprising the high strength porous polytetrafluoroethylene sheet material according to claim 13.
Claim 25
Dependent Claim
79 words
A high strength, flexible, porous polytetrafluoroethylene sheet material comprised of multiple layers of porous polytetrafluoroethylene laminated together, said layers each having a fibrillar orientation wherein the fibrillar orientation of adjacent layers with respect to each other is at an included angle of less than ninety degrees, said sheet material being capable of assuming the form of a flat plane, and further having a minimum secant modulus in substantially all directions within the flat plane between 50 and 537.4 megapascals.
Claim 26
Dependent Claim
79 words
A high strength, flexible, porous polytetrafluoroethylene sheet material comprised of multiple layers of porous polytetrafluoroethylene laminated together, said layers each having a fibrillar orientation wherein the fibrillar orientation of adjacent layers with respect to each other is at an included angle of less than ninety degrees, said sheet material being capable of assuming the form of a flat plane, and further having a minimum secant modulus in substantially all directions within the flat plane between 50 and 537.4 megapascals.
Claim 27
Dependent Claim
22 words
A high strength porous polytetrafluoroethylene sheet material according to claim 23 wherein the minimum secant modulus is between 56 and 537.4 megapascals.
Claim 28
Dependent Claim
22 words
A high strength porous polytetrafluoroethylene sheet material according to claim 23 wherein the minimum secant modulus is between 100 and 537.4 megapascals.
Claim 29
Dependent Claim
15 words
A tubular article comprising the high strength porous polytetrafluoroethylene sheet material according to claim 25.
Claim 30
Dependent Claim
16 words
A surgical repair patch comprising the high strength porous polytetrafluoroethylene sheet material according to claim 25.
Claim 31
Dependent Claim
17 words
A blood vessel repair patch comprising the high strength porous polytetrafluoroethylene sheet material according to claim 25.
Claim 32
Dependent Claim
22 words
A high strength porous polytetrafluoroethylene sheet material according to claim 23 wherein the minimum secant modulus is between 200 and 537.4 megapascals.
Claim 33
Dependent Claim
22 words
A high strength porous polytetrafluoroethylene sheet material according to claim 23 wherein the minimum secant modulus is between 350 and 537.4 megapascals.
Claim 34
Dependent Claim
22 words
A high strength porous polytetrafluoroethylene sheet material according to claim 23 wherein the minimum secant modulus is between 500 and 537.4 megapascals.
Claim 35
Dependent Claim
15 words
A tubular article comprising the high strength porous polytetrafluoroethylene sheet material according to claim 23.
Claim 36
Dependent Claim
16 words
A surgical repair patch comprising the high strength porous polytetrafluoroethylene sheet material according to claim 23.
Claim 37
Dependent Claim
17 words
A blood vessel repair patch comprising the high strength porous polytetrafluoroethylene sheet material according to claim 23.
Claim 38
Dependent Claim
80 words
A high strength, flexible, porous polytetrafluoroethylene sheet material comprised of multiple layers of porous polytetrafluoroethylene laminated together, said layers each having a fibrillar orientation wherein the fibrillar orientation of adjacent layers with respect to each other is at an included angle of less than ninety degrees, said sheet material being capable of assuming the form of a flat plane, and further having a minimum matrix secant modulus in substantially all directions within the flat plane between 224 and 1188 megapascals.
Claim 39
Dependent Claim
80 words
A high strength, flexible, porous polytetrafluoroethylene sheet material comprised of multiple layers of porous polytetrafluoroethylene laminated together, said layers each having a fibrillar orientation wherein the fibrillar orientation of adjacent layers with respect to each other is at an included angle of less than ninety degrees, said sheet material being capable of assuming the form of a flat plane, and further having a minimum matrix secant modulus in substantially all directions within the flat plane between 224 and 1188 megapascals.
Claim 40
Dependent Claim
23 words
A high strength porous polytetrafluoroethylene sheet material according to claim 35 wherein the minimum matrix secant modulus is between 237 and 1188 megapascals.
Claim 41
Dependent Claim
23 words
A high strength porous polytetrafluoroethylene sheet material according to claim 35 wherein the minimum matrix secant modulus is between 251 and 1188 megapascals.
Claim 42
Dependent Claim
23 words
A high strength porous polytetrafluoroethylene sheet material according to claim 35 wherein the minimum matrix secant modulus is between 350 and 1388 megapascals.
Claim 43
Dependent Claim
15 words
A tubular article comprising the high strength porous polytetrafluoroethylene sheet material according to claim 38.
Claim 44
Dependent Claim
16 words
A surgical repair patch comprising the high strength porous polytetrafluoroethylene sheet material according to claim 38.
Claim 45
Dependent Claim
17 words
A blood vessel repair patch comprising the high strength porous polytetrafluoroethylene sheet material according to claim 38.
Claim 46
Dependent Claim
23 words
A high strength porous polytetrafluoroethylene sheet material according to claim 35 wherein the minimum matrix secant modulus is between 500 and 1188 megapascals.
Claim 47
Dependent Claim
23 words
A high strength porous polytetrafluoroethylene sheet material according to claim 35 wherein the minimum matrix secant modulus is between 800 and 1188 megapascals.
Claim 48
Dependent Claim
23 words
A high strength porous polytetrafluoroethylene sheet material according to claim 35 wherein the minimum matrix secant modulus is between 1000 and 1188 megapascals.
Claim 49
Dependent Claim
23 words
A high strength porous polytetrafluoroethylene sheet material according to claim 35 wherein the minimum matrix secant modulus is between 1100 and 1188 megapascals.
Claim 50
Dependent Claim
15 words
A tubular article comprising the high strength porous polytetrafluoroethylene sheet material according to claim 35.
Claim 51
Dependent Claim
16 words
A surgical repair patch comprising the high strength porous polytetrafluoroethylene sheet material according to claim 35.
Claim 52
Dependent Claim
17 words
A blood vessel repair patch comprising the high strength porous polytetrafluoroethylene sheet material according to claim 35.
Claim 53
Dependent Claim
89 words
A high strength, flexible, porous polytetrafluoroethylene sheet material comprised of multiple layers of porous polytetrafluoroethylene laminated together, said layers each having a fibrillar orientation wherein the fibrillar orientation of adjacent layers with respect to each other is at an included angle of less than ninety degrees, said sheet material being capable of assuming the form of a flat plane, and further having a minimum tensile strength in substantially all directions within the flat plane between 32.6 and 97.5 megapascals and a minimum secant modulus between 50 and 537.4 megapascals.
Claim 54
Dependent Claim
89 words
A high strength, flexible, porous polytetrafluoroethylene sheet material comprised of multiple layers of porous polytetrafluoroethylene laminated together, said layers each having a fibrillar orientation wherein the fibrillar orientation of adjacent layers with respect to each other is at an included angle of less than ninety degrees, said sheet material being capable of assuming the form of a flat plane, and further having a minimum tensile strength in substantially all directions within the flat plane between 32.6 and 97.5 megapascals and a minimum secant modulus between 50 and 537.4 megapascals.
Claim 55
Dependent Claim
33 words
A high strength porous polytetrafluoroethylene sheet material according to claim 49 wherein the minimum tensile strength is between 50 and 97.5 megapascals and the minimum secant modulus is between 100 and 537.4 megapascals.
Claim 56
Dependent Claim
91 words
A high strength, flexible, porous polytetrafluoroethylene sheet material comprised of multiple layers of porous polytetrafluoroethylene laminated together, said layers each having a fibrillar orientation wherein the fibrillar orientation of adjacent layers with respect to each other is at an included angle of less than ninety degrees, said sheet material being capable of assuming the form of a flat plane, and further having a minimum matrix tensile strength in substantially all directions within the flat plane between 146 and 215.6 megapascals and a minimum matrix secant modulus between 224 and 1188 megapascals.
Claim 57
Dependent Claim
91 words
A high strength, flexible, porous polytetrafluoroethylene sheet material comprised of multiple layers of porous polytetrafluoroethylene laminated together, said layers each having a fibrillar orientation wherein the fibrillar orientation of adjacent layers with respect to each other is at an included angle of less than ninety degrees, said sheet material being capable of assuming the form of a flat plane, and further having a minimum matrix tensile strength in substantially all directions within the flat plane between 146 and 215.6 megapascals and a minimum matrix secant modulus between 224 and 1188 megapascals.
Claim 58
Dependent Claim
35 words
A high strength porous polytetrafluoroethylene sheet material according to claim 51 wherein the minimum matrix tensile strength is between 200 and 25.6 megapascals and the minimum matrix secant modulus is between 500 and 1188 megapascals.
Claim 59
Dependent Claim
21 words
A high strength, flexible, porous polytetrafluoroethylene sheet material according to claim 1 wherein the included angle is less than 30 degrees.
Claim 60
Dependent Claim
21 words
A high strength, flexible, porous polytetrafluoroethylene sheet material according to claim 13 wherein the included angle is less than 30 degrees.
Claim 61
Dependent Claim
21 words
A high strength, flexible, porous polytetrafluoroethylene sheet material according to claim 23 wherein the included angle is less than 30 degrees.
Claim 62
Dependent Claim
21 words
A high strength, flexible, porous polytetrafluoroethylene sheet material according to claim 35 wherein the included angle is less than 30 degrees.
Claim 63
Dependent Claim
21 words
A high strength, flexible, porous polytetrafluoroethylene sheet material according to claim 49 wherein the included angle is less than 30 degrees.
Claim 64
Dependent Claim
21 words
A high strength, flexible, porous polytetrafluoroethylene sheet material according to claim 51 wherein the included angle is less than 30 degrees.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-07-07 | 2001-01-06 | 2001-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-07-07 | 2005-01-06 | 2005-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-07-07 | 2009-01-06 | 2009-07-08 | $7700.00 | Window Closed / Lapsed |