Patent US5201764A successfully refreshed from Google Patents.
US5201764A
Expired / Lapsed
US
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Biologically compatible collagenous reaction product and articles useful as medical implants produced therefrom
Assignee: Collagenesis Inc
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Filing: 1992-01-22
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Granted: 1993-04-13
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Expires: 2012-01-22
Abstract
Abstract The present invention provides a biologically compatible collagenous reaction product comprising ethylenically unsaturated or polymeric substituted collagen, the monomeric substituents being essentially free of nitrogen, e.g., methacrylate, styrene, polyvinyl, ethylene. The collagenous reaction product can be polymerized, e.g., by exposure to UV irradiation, chemical agents or atmospheric oxygen, and molded to form useful medical implant articles. Methods of preparation are also provided.
Inventors
- 👤 Charles D. Kelman
- 👤 Dale P. DeVore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:58
CPC Classifications
C; C08; C08F; C08F289/00; A; A61; A61L; A61L27/00; A61L27/14; A61L27/22; A61L27/24; G; G02; G02B; G02B1/00; G02B1/04; G02B1/041; G02B1/043; A61F; A61F2310/00; A61F2310/00005; A61F2310/00365; A61L2430/00; A61L2430/16; Y; Y10; Y10S; Y10S128/00; Y10S128/08; Y10S623/00; Y10S623/901
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
60 words
A shaped article useful for medical implantation comprising a biocompatible collagenous polymer of collagen modified with an acylating agent selected from the group consisting of glutaric anhydride, succinic anhydride, and maleic anhydride and at least one other acylating agent selected from the group consisting of methacrylic anhydride, beta-styrene sulfonyl chloride, ethylene-maleic anhydride copolymer, styrene-maleic anhydride copolymer and poly(vinyl) sulfonic acid.
Claim 2
Dependent Claim
60 words
A shaped article useful for medical implantation comprising a biocompatible collagenous polymer of collagen modified with an acylating agent selected from the group consisting of glutaric anhydride, succinic anhydride, and maleic anhydride and at least one other acylating agent selected from the group consisting of methacrylic anhydride, beta-styrene sulfonyl chloride, ethylene-maleic anhydride copolymer, styrene-maleic anhydride copolymer and poly(vinyl) sulfonic acid.
Claim 3
Dependent Claim
12 words
The shaped article of claim 1 wherein said product forms a lens.
Claim 4
Dependent Claim
25 words
The shaped article of claim 2 wherein said lens is selected from the group consisting of contact lens, corneal onlay, corneal inlay and intraocular lens.
Claim 5
Dependent Claim
43 words
The shaped article according to claim 1, comprising a biocompatible collagenous polymer of collagen modified with glutaric anhydride and at least one member of the group consisting of methacrylic anhydride, beta-styrene sulfonyl chloride, ethylene-maleic anhydride copolymer, styrene-maleic anhydride copolymer, and poly(vinyl) sulfonic acid.
Claim 6
Dependent Claim
12 words
The shaped article of claim 4 wherein said product forms a lens.
Claim 7
Dependent Claim
25 words
The shaped article of claim 5, wherein said lens is selected from the group consisting of contact lens, corneal onlay, corneal inlay and intraocular lens.
Claim 8
Dependent Claim
40 words
A shaped article useful for medical implantation comprising a biocompatible collagenous polymer of collagen modified with an acrylating agent selected from the group consisting of methacrylic anhydride, beta-styrene sulfonyl chloride, ethylene-maleic anhydride copolymer, styrene-maleic anhydride copolymer, and poly(vinyl) sulfonic acid.
Claim 9
Dependent Claim
40 words
A shaped article useful for medical implantation comprising a biocompatible collagenous polymer of collagen modified with an acrylating agent selected from the group consisting of methacrylic anhydride, beta-styrene sulfonyl chloride, ethylene-maleic anhydride copolymer, styrene-maleic anhydride copolymer, and poly(vinyl) sulfonic acid.
Claim 10
Dependent Claim
12 words
The shaped article of claim 7, wherein said product forms a lens.
Claim 11
Dependent Claim
25 words
The shaped article of claim 8, wherein said lens is selected from the group consisting of contact lens, corneal onlay, corneal inlay and intraocular lens.
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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) | 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 |