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US4365050A
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Amino-polysaccharides and copolymers thereof for contact lenses and ophthalmic compositions
Assignee: Individual
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Filing: 1981-07-15
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Granted: 1982-12-21
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Expires: 2001-07-15
Abstract
Abstract Aminopolysaccharides and copolymers thereof, primarily those of N-acetyl-D-glucosamines and derivatives and various monomers, is described.
Inventors
- 👤 Edward J. Ivani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:38
CPC Classifications
G; G02; G02B; G02B1/00; G02B1/04; G02B1/041; G02B1/043; A; A61; A61K; A61K47/00; A61K47/30; A61K47/36; A61L; A61L27/00; A61L27/14; A61L27/20; C; C08; C08F; C08F251/00; C08L; C08L5/00; C08L5/08; Y; Y10; Y10S; Y10S525/00; Y10S525/937
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
57 words
A polymeric composition formed from D-glucosamine or derivatives thereof selected from the group consisting of N-acetyl-D-glucosamine, substituted N-acetyl-D-glucosamine, derivatives of N-acetyl-D-glucosamine and graft and block polymers of N-acetyl-D-glucosamine, and a compound selected from the group consisting of a silicone, collagen, acrylonitrile, acrylamide, methacrylate acids and esters, alkylaminoalkyl methacrylate and hydroxyalkyl methacrylate and pyrrolidone and derivatives of pyrrolidone.
Claim 2
Dependent Claim
57 words
A polymeric composition formed from D-glucosamine or derivatives thereof selected from the group consisting of N-acetyl-D-glucosamine, substituted N-acetyl-D-glucosamine, derivatives of N-acetyl-D-glucosamine and graft and block polymers of N-acetyl-D-glucosamine, and a compound selected from the group consisting of a silicone, collagen, acrylonitrile, acrylamide, methacrylate acids and esters, alkylaminoalkyl methacrylate and hydroxyalkyl methacrylate and pyrrolidone and derivatives of pyrrolidone.
Claim 3
Dependent Claim
15 words
A composition according to claim 1 consisting of a D-glucosamine or derivative thereof and silicone.
Claim 4
Dependent Claim
15 words
A composition according to claim 1 consisting of a D-glucosamine or derivative thereof and collagen.
Claim 5
Dependent Claim
15 words
A composition according to claim 1 consisting of a D-glucosamine or derivative thereof and acrylonitrile.
Claim 6
Dependent Claim
15 words
A composition according to claim 1 consisting of a D-glucosamine or derivative thereof and acrylamide.
Claim 7
Dependent Claim
23 words
A composition according to claim 1 consisting of a D-glucosamine or derivative thereof and methacrylate acids and esters, alkylaminoalkyl methacrylate and hydroxyalkyl methacrylate.
Claim 8
Dependent Claim
19 words
A composition according to claim 1 consisting of a D-glucosamine or derivative thereof and pyrrolidone or a derivative thereof.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-12-20 | 1986-06-21 | 1986-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-20 | 1990-06-21 | 1990-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-20 | 1994-06-21 | 1994-12-21 | $7700.00 | Window Closed / Lapsed |