US4268131A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fiber collagen contact lens
Assignee: VISION 2000 TECHNOLOGIES Inc
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Filing: 1979-04-11
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Granted: 1981-05-19
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Expires: 1999-04-11
Abstract
Abstract Soft contact lenses are made from purified fiber collagen and mixtures of such fiber with purified solubilized collagen.
Inventors
- 👤 Teruo Miyata
- 👤 Albert L. Rubin
- 👤 Kurt H. Stenzel
- 👤 Michael W. Dunn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:57
CPC Classifications
G; G02; G02B; G02B1/00; G02B1/04; G02B1/041; G02B1/043; C; C08; C08L; C08L89/00; C08L89/04; C08L89/06; G02C; G02C7/00; G02C7/02; G02C7/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
33 words
As an article of manufacture a soft contact lens consisting of a lens-shaped, subsequently crosslinked gel of defatted fiber collagen, said gel comprising 1.0 to 30.0 wt. % collagen and the balance water.
Claim 2
Dependent Claim
33 words
As an article of manufacture a soft contact lens consisting of a lens-shaped, subsequently crosslinked gel of defatted fiber collagen, said gel comprising 1.0 to 30.0 wt. % collagen and the balance water.
Claim 3
Dependent Claim
16 words
A soft contact lens of claim 1 in which the fiber collagen is animal tendon collagen.
Claim 4
Dependent Claim
16 words
A soft contact lens of claim 1 in which the fiber collagen is beef tendon collagen.
Claim 5
Dependent Claim
16 words
A soft contact lens of claim 1 in which the fiber collagen is chemically modified collagen.
Claim 6
Dependent Claim
40 words
As an article of manufacture a soft contact lens consisting of a lens-shaped, subsequently crosslinked gel of a mixture of defatted fiber collagen and defatted solubilized collagen, said gel comprising 1.0 to 30.0 wt. % collagen and the balance water.
Claim 7
Dependent Claim
40 words
As an article of manufacture a soft contact lens consisting of a lens-shaped, subsequently crosslinked gel of a mixture of defatted fiber collagen and defatted solubilized collagen, said gel comprising 1.0 to 30.0 wt. % collagen and the balance water.
Claim 8
Dependent Claim
16 words
A soft contact lens of claim 5 in which the solubilized collagen is enzyme-solubilized telopeptide-poor collagen.
Claim 9
Dependent Claim
28 words
A soft contact lens of claim 5 in which the weight ratio of fiber collagen to solubilized collagen in the mixture ranges from about 1:10 to about 10:1.
References Cited (Backward Citations)
US3314861A
Cited
US3530037A
Cited
US3443261A
Cited
US3760045A
Cited
US3955012A
Cited
JPS4939174A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-05-18 | 1984-11-17 | 1985-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-18 | 1988-11-17 | 1989-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-18 | 1992-11-17 | 1993-05-19 | $7700.00 | Window Closed / Lapsed |