US5326355A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite material having absorbable and nonabsorbable components for use with mammalian tissue
Assignee: Covidien AG
•
Filing: 1992-08-24
•
Granted: 1994-07-05
•
Expires: 2012-08-24
Abstract
Abstract The invention is a composite material of two or more biocompatible polymers, at least one of which is polytetrafluoroethylene (PTFE) and one of which is a bioabsorbable polymer. The nonabsorbable PTFE is used in the composite as a reinforcing binder. The reinforcing binder is a network of unsintered, interconnected micro-fibers which are formed, for example, by blending with a thermoplastic polymer vehicle, such as polymethylmethacrylate which is subsequently extracted. The bioabsorbable component is contained within the structure of the PTFE microfibrils. This composite is useful in the repair of mammalian tissue where tissue ingrowth and permanent support is required.
Inventors
- 👤 Henry P. Landi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:09
CPC Classifications
A; A61; A61L; A61L31/00; A61L31/14; A61L31/148; A61L15/00; A61L15/16; A61L15/22; A61L15/24; A61L15/42; A61L15/64; A61L27/00; A61L27/14; A61L27/26; A61L27/40; A61L27/44; A61L27/48; A61L27/50; A61L27/58; A61L31/04; A61L31/041; A61L31/12; A61L31/125; A61L31/129; Y; Y10; Y10S; Y10S623/00; Y10S623/924; Y10S623/926; Y10T; Y10T442/00; Y10T442/10; Y10T442/102; Y10T442/164; Y10T442/167; Y10T442/30; Y10T442/3146; Y10T442/3171; Y10T442/3854; Y10T442/3878; Y10T442/40; Y10T442/60; Y10T442/674; Y10T442/677
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
61 words
A composite film for use with mammalian tissue consisting essentially of: a) an unsintered, microfibrillar, nonabsorbable biocompatible component prepared from polytetrafluoroethylene, b) at least one bioabsorbable fiber manufactured from a polymer prepared from one or more monomers selected from the group consisting of lactides, carbonates, oxalates and lactones, and c) wherein the composite film is in the form of a sheet.
Claim 2
Dependent Claim
61 words
A composite film for use with mammalian tissue consisting essentially of: a) an unsintered, microfibrillar, nonabsorbable biocompatible component prepared from polytetrafluoroethylene, b) at least one bioabsorbable fiber manufactured from a polymer prepared from one or more monomers selected from the group consisting of lactides, carbonates, oxalates and lactones, and c) wherein the composite film is in the form of a sheet.
Claim 3
Dependent Claim
101 words
A composite film for use with mammalian tissue consisting essentially of: a) an unsintered, microfibrillar, nonabsorbable biocompatible component prepared from polytetrafluoroethylene, and b) at least one bioabsorbable fiber manufactured from a polymer prepared from one or more monomers selected from the group consisting of lactides, carbonates, oxalates and lactones, and optionally c) a non-absorbable, biocompatible thermoplastic component manufactured from a polymer which is liquid at a temperature from about 150° to 200° C. and solid at ambient temperature, and which provides additional integrity to the unsintered component, and d) wherein the composite film is in the form of a hollow tube.
Claim 4
Dependent Claim
101 words
A composite film for use with mammalian tissue consisting essentially of: a) an unsintered, microfibrillar, nonabsorbable biocompatible component prepared from polytetrafluoroethylene, and b) at least one bioabsorbable fiber manufactured from a polymer prepared from one or more monomers selected from the group consisting of lactides, carbonates, oxalates and lactones, and optionally c) a non-absorbable, biocompatible thermoplastic component manufactured from a polymer which is liquid at a temperature from about 150° to 200° C. and solid at ambient temperature, and which provides additional integrity to the unsintered component, and d) wherein the composite film is in the form of a hollow tube.
Claim 5
Dependent Claim
22 words
The material of claim 1 or 2 wherein the bioabsorbable component is selected from the group consisting of lactides, carbonates and lactones.
Claim 6
Dependent Claim
27 words
The material of claim 3 wherein the unsintered component has at least two pores and the bioabsorbable component is enmeshed in the pores of said unsintered component.
Claim 7
Dependent Claim
12 words
The material of claim 3 wherein the non-absorbable, thermoplastic component is poly-(ethylene-vinylacetate).
Claim 8
Dependent Claim
28 words
The material of claim 4 wherein the un-sintered component has at least two pores and the nonabsorbable, thermoplastic component is enmeshed in the pores of said unsintered component.
Claim 9
Dependent Claim
70 words
A composite material for use with mammalian tissue comprising a first part consisting of the composite material of claim 1 or 2, and a second part affixed to at least one side of the first part, the second part comprising a bioabsorbable textile reinforcement component, the bioabsorbable reinforcement component being woven or knitted, and manufactured from the same or a different polymer than the bioabsorbable component of the first part.
Claim 10
Dependent Claim
22 words
The material of claim 7 wherein the bioabsorbable textile reinforcement component is selected from the group consisting of lactides, carbonates and lactones.
Claim 11
Dependent Claim
35 words
The material of claim 8 wherein the lactides are selected from the group consisting of glycolide and 3,6-dimethyl-1,4-dioxan-2,5-dione; the carbonate is 1,3-dioxan-2-one; and the lactones are selected from the group consisting of ε-caprolactone and 1,4-dioxan-2-one.
Claim 12
Dependent Claim
20 words
The material of claim 9 wherein said bioabsorbable textile reinforcement component is affixed to both sides of the first part.
Claim 13
Dependent Claim
16 words
The material of claim 10 wherein said textile reinforcement component is laminated to said first part.
Claim 14
Dependent Claim
36 words
The composite film of claim 3 wherein the lactides are selected from the group consisting of glycolide and 3,6-dimethyl-1,4-dioxane-2,5-dione; the carbonate is 1,3-dioxan-2-one; and the lactones are selected from the group consisting of ε-caprolactone and 1,4-dioxan-2-one.
Claim 15
Dependent Claim
14 words
The composite film of claim 12 wherein the bioabsorbable fiber is manufactured from glycolide.
Claim 16
Dependent Claim
14 words
The composite film of claim 6 wherein said nonabsorbable, thermoplastic component is poly(ethylene-vinyl acetate).
References Cited (Backward Citations)
US3527616A
Cited
US3272204A
Cited
US3407096A
Cited
US3407249A
Cited
US3968297A
Cited
US4052988A
Cited
US4332035A
Cited
US4286341A
Cited
US4610688A
Cited
US4759765A
Cited
US5028597A
Cited
US4849285A
Cited
US5141522A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-07-04 | 1998-01-03 | 1998-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-07-04 | 2002-01-03 | 2002-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-07-04 | 2006-01-03 | 2006-07-05 | $7700.00 | Window Closed / Lapsed |