US4419505A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Contact lens composition, article and method of manufacture
Assignee: Paragon Optical Inc
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Filing: 1982-07-14
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Granted: 1983-12-06
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Expires: 2002-07-14
Abstract
Abstract A copolymer composition, specially adapted for use in fabricating a contact lens comprises a copolymer of comonomers which include about 1-95 parts by weight of hydroxy silane esters of acrylic or methacrylic acid and about 99-5 parts by weight of a C 1 -C 20 alkanol ester of acrylic or methacrylic acid. Contact lenses and contact lens blanks are formed of such copolymer by conventional techniques and also by injection molding.
Inventors
- 👤 Donald J. Ratkowski
- 👤 Ping-Chang Lue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:22
CPC Classifications
C; C08; C08F; C08F230/00; C08F230/04; C08F230/08; G; G02; G02B; G02B1/00; G02B1/04; C08F230/085
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
121 words
A copolymer composition, specially adapted for use in fabricating a contact lens, comprising a copolymer of copolymerized comonomers including: (a) about 1-95 parts by weight of a hydroxy ester silane of the structure ##STR5## where R=CH 3 --, H-- X, Y=C 1 -C 6 Alkyl, phenyl, Z ##STR6## n=1-3 m=1-5 and (b) an alkyl-alkoxy silane of the structure ##STR7## where R 1 , R 2 and R 3 --C 1 -C 6 Alkyl n=an integer from 1-3, said alkyl-alkoxy silane being present in an amount of 0 parts by weight to just below stoichiometric with respect to said hydroxy ester silane; and (c) about 99-5 parts by weight of a C 1 -C 20 alkanol ester of acrylic or methacrylic acid.
Claim 2
Dependent Claim
121 words
A copolymer composition, specially adapted for use in fabricating a contact lens, comprising a copolymer of copolymerized comonomers including: (a) about 1-95 parts by weight of a hydroxy ester silane of the structure ##STR5## where R=CH 3 --, H-- X, Y=C 1 -C 6 Alkyl, phenyl, Z ##STR6## n=1-3 m=1-5 and (b) an alkyl-alkoxy silane of the structure ##STR7## where R 1 , R 2 and R 3 --C 1 -C 6 Alkyl n=an integer from 1-3, said alkyl-alkoxy silane being present in an amount of 0 parts by weight to just below stoichiometric with respect to said hydroxy ester silane; and (c) about 99-5 parts by weight of a C 1 -C 20 alkanol ester of acrylic or methacrylic acid.
Claim 3
Dependent Claim
16 words
As a new article of manufacture, a contact lens fabricated from the composition of claim 1.
Claim 4
Dependent Claim
17 words
As a new article of manufacture, a contact lens blank fabricated from the composition of claim 1.
Claim 5
Dependent Claim
23 words
A method for manufacturing a contact lens comprising injection molding the composition of claim 1 to form said lens as a shaped article.
References Cited (Backward Citations)
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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) | 1986-12-05 | 1987-06-06 | 1987-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-05 | 1991-06-06 | 1991-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-05 | 1995-06-06 | 1995-12-06 | $7700.00 | Window Closed / Lapsed |