US5201745A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Visceral surgery patch
Assignee: DEVELOPMENT DES UTILISATIONS DU CUIR-SADUC SA
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Filing: 1991-08-15
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Granted: 1993-04-13
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Expires: 2011-08-15
Abstract
Abstract A patch for visceral surgery is made from a biomaterial consisting of two layers of collagen superimposed and closely combined, namely a porous adhesive layer of fibrous collagen and a film of collagen and/or gelatin.
Inventors
- 👤 Jean-Louis Tayot
- 👤 Jacques Marescaux
- 👤 Henri Dumas
- 👤 Michel Tardy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:28
CPC Classifications
A; A61; A61L; A61L31/00; A61L31/08; A61L31/10; A61F; A61F2/00; A61F2/0063; A61L31/12; A61L31/125; A61L31/129; A61L31/14; A61L31/148
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
73 words
A visceral surgery patch which is fully biodegradable comprising: a first biodegradable layer forming a film selected from the group consisting of biodegradable collagen, gelatin and mixtures thereof, and a second biodegradable porous layer of fibrous biodegradable collagen, said first and second biodegradable layers being directly superimposed and said first biodegradable layer at least partially impregnating said second biodegradable layer, and said patch having a density of at most 8 mg/cm 2 .
Claim 2
Dependent Claim
73 words
A visceral surgery patch which is fully biodegradable comprising: a first biodegradable layer forming a film selected from the group consisting of biodegradable collagen, gelatin and mixtures thereof, and a second biodegradable porous layer of fibrous biodegradable collagen, said first and second biodegradable layers being directly superimposed and said first biodegradable layer at least partially impregnating said second biodegradable layer, and said patch having a density of at most 8 mg/cm 2 .
Claim 3
Dependent Claim
45 words
A patch according to claim 1 made by the process of casting a collagen solution onto the second biodegradable layer whose shape and dimensions correspond to said patch, to form said first biodegradable layer superimposed over and at least partially impregnating said second biodegradable layer.
Claim 4
Dependent Claim
24 words
A patch according to claim 1, characterized in that the porous layer and film have respective densities of 2 and 1 mg/cm 2 .
Claim 5
Dependent Claim
29 words
A patch according to claim 1, characterized in that the collagen of said first and second layers is non-cured collagen and/or collagen which has been subjected to gentle curing.
Claim 6
Dependent Claim
23 words
A patch according to claim 4, characterized in that the collagen is made of 80% of non-cured collagen and 20% of gently-cured collagen.
Claim 7
Dependent Claim
18 words
A pitch according to claim 4, characterized in that the gently cured collagen is cured by periodic oxidation.
Claim 8
Dependent Claim
21 words
A patch according to claim 4, characterized in that the second layer is made up of human type III+I fibrous collagen.
Claim 9
Dependent Claim
21 words
A patch according to claim 4, characterized in that the second layer is made up of human type IV fibrous collagen.
Claim 10
Dependent Claim
27 words
A patch according to claim 4, characterized in that the second layer is made up of a mixture of human type III, I and IV fibrous collagen.
Claim 11
Dependent Claim
22 words
A patch according to claim 4, characterized in that the collagen is made up of human type IV and/or type III+I collagen.
Claim 12
Dependent Claim
16 words
A patch according to claim 1, characterized in that the film is made up of gelatin.
Claim 13
Dependent Claim
21 words
A patch according to claim 1 characterized in that the second layer includes 2-30% collagen and the film includes 40-100% collagen.
Claim 14
Dependent Claim
22 words
A patch according to claim 1 characterized in that the thickness of the fibrous layer is between 100 microns and 8 mm.
Claim 15
Dependent Claim
16 words
A patch according to claim 1, characterized in that the film thickness is between 5-250 microns.
References Cited (Backward Citations)
US3491760A
Cited
US3272204A
Cited
US3526228A
Cited
US4291013A
Cited
US4403604A
Cited
EP0227955A2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-04-12 | 1996-10-12 | 1997-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-04-12 | 2000-10-12 | 2001-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-04-12 | 2004-10-12 | 2005-04-13 | $7700.00 | Window Closed / Lapsed |