US4264155A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Collagen contact lens
Assignee: VISION 2000 TECHNOLOGIES Inc
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Filing: 1979-07-09
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Granted: 1981-04-28
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Expires: 1999-07-09
Abstract
Abstract Improved soft contact lenses are made from collagen gels to which water-soluble organic polyhydroxy polymers are added, e.g. mucopolysaccharides, polyvinyl alcohols, etc.
Inventors
- 👤 Teruo Miyata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:17
CPC Classifications
G; G02; G02B; G02B1/00; G02B1/04; G02B1/041; G02B1/043; C; C08; C08L; C08L89/00; C08L89/04; C08L89/06
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
45 words
As an article of manufacture, a soft contact lens consisting of a body of lens-shaped subsequently cross-linked collagen gel, said gel having a concentration of 1.0 to 30 wt. % collagen, 0.1 to 30 wt. % of a water-soluble, organic polymer, and the balance water.
Claim 2
Dependent Claim
45 words
As an article of manufacture, a soft contact lens consisting of a body of lens-shaped subsequently cross-linked collagen gel, said gel having a concentration of 1.0 to 30 wt. % collagen, 0.1 to 30 wt. % of a water-soluble, organic polymer, and the balance water.
Claim 3
Dependent Claim
14 words
The soft contact lens of claim 1 in which the gel is enzyme-solubilized collagen.
Claim 4
Dependent Claim
15 words
The soft contact lens of claim 1 in which the lens-shaped gel is chemically cross-linked.
Claim 5
Dependent Claim
28 words
The soft contact lens of claim 1 in which the lens-shaped gel is cross-linked in two stages utilizing irradiation in one stage and chemical treatment in the other.
Claim 6
Dependent Claim
19 words
The soft contact lens of claim 1 in which the gel contains 1.0 to 25 wt. % of mucopolysaccharide.
Claim 7
Dependent Claim
16 words
The soft contact lens of claim 5 in which the lens-shaped gel is crosslinked with glutaraldehyde.
Claim 8
Dependent Claim
19 words
The soft contact lens of claim 1 in which the gel contains 1.0 to 25 wt. % polyvinyl alcohol.
Claim 9
Dependent Claim
21 words
The soft contact lens of claim 7 in which the lens-shaped gel is cross-linked by treating with acrolein in two stages.
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) | 1984-04-27 | 1984-10-27 | 1985-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-04-27 | 1988-10-27 | 1989-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-04-27 | 1992-10-27 | 1993-04-28 | $7700.00 | Window Closed / Lapsed |