US4500695A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silicone-vinyl acetate composition for contact lenses
Assignee: Individual
•
Filing: 1983-06-13
•
Granted: 1985-02-19
•
Expires: 2003-06-13
Abstract
Abstract Contact lenses having increased oxygen permeability are fabricated at least in part from a copolymer of a vinyl siloxane and vinyl acetate.
Inventors
- 👤 Edward J. Ivani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:56
CPC Classifications
C; C08; C08F; C08F230/00; C08F230/04; C08F230/08; C08F218/00; C08F218/02; C08F218/04; C08F218/08; G; G02; G02B; G02B1/00; G02B1/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
125 words
A composition specially adapted for the manufacturing of contact lenses having increased oxygen permeability, consisting essentially of a copolymer of comonomers consisting of about 2-98 parts by weight of a vinyl siloxane monomer copolymerized with 98-2 parts by weight of vinyl acetate, the vinyl siloxane monomer being a polysiloxanylalkyl ester having as its structure: ##STR3## wherein P and Q are selected from the group consisting of (C 1 -C 7 ) alkyl, phenyl and Z groups; Z is ##STR4## wherein A is selected from the group consisting of (C 1 -C 7 ) alkyl and phenyl groups; R is selected from the group consisting of methyl, ethyl, and butyl groups and hydrogen; m and n are integers of at least 1 and less than 8.
Claim 2
Dependent Claim
125 words
A composition specially adapted for the manufacturing of contact lenses having increased oxygen permeability, consisting essentially of a copolymer of comonomers consisting of about 2-98 parts by weight of a vinyl siloxane monomer copolymerized with 98-2 parts by weight of vinyl acetate, the vinyl siloxane monomer being a polysiloxanylalkyl ester having as its structure: ##STR3## wherein P and Q are selected from the group consisting of (C 1 -C 7 ) alkyl, phenyl and Z groups; Z is ##STR4## wherein A is selected from the group consisting of (C 1 -C 7 ) alkyl and phenyl groups; R is selected from the group consisting of methyl, ethyl, and butyl groups and hydrogen; m and n are integers of at least 1 and less than 8.
Claim 3
Dependent Claim
16 words
The composition of claim 1 wherein said copolymer is a copolymer of vinyl acetate and methacryloxypropyltri(trimethylsiloxy)silane.
Claim 4
Dependent Claim
16 words
The composition of claim 1 wherein said copolymer is a copolymer of methacryloxypropylpentamethyldisiloxane and vinyl acetate.
Claim 5
Dependent Claim
16 words
The composition of claim 1 wherein said copolymer is a copolymer of methacryloxypropyltris(pentamethyldisiloxyaryl)silane and vinyl acetate.
Claim 6
Dependent Claim
17 words
The composition of claim 1 wherein said copolymer is a copolymer of methyldi(trimethylsiloxy)silylpropylglycerol methacrylate and vinyl acetate.
Claim 7
Dependent Claim
16 words
The composition of claim 1 wherein said copolymer is a copolymer of bis(methacryloxybutyl)tetramethyldisiloxane and vinyl acetate.
Claim 8
Dependent Claim
56 words
A composition specially adapted for contact lenses having increased oxygen permeability, consisting essentially of a solid copolymer of the vinysiloxane monomer of claim 1, vinyl acetate and about 20-70 parts by weight of an ester of a C 1 -C 20 monohydric alkanol and an acid selected from the group consisting of acrylic and methacrylic acids.
Claim 9
Dependent Claim
24 words
As a new article of manufacture, a contact lens having an increased oxygen permeability, consisting essentially of the compositions of claim 1 or 2.
References Cited (Backward Citations)
US3228741A
Cited
US3805178A
Cited
US4097436A
Cited
US4120570A
Cited
US4139692A
Cited
US4139513A
Cited
US4330383A
Cited
US4216303A
Cited
US4246389A
Cited
US4248989A
Cited
US4410674A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-02-19 | 1988-08-20 | 1989-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-19 | 1992-08-20 | 1993-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-19 | 1996-08-20 | 1997-02-19 | $7700.00 | Window Closed / Lapsed |