US4223984A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Collagen soft contact lens
Assignee: VISION 2000 TECHNOLOGIES Inc
•
Filing: 1979-04-04
•
Granted: 1980-09-23
•
Expires: 1999-04-04
Abstract
Abstract Soft contact lenses are made from solubilized, defatted, transparent, cross-linked collagen, and/or chemically-modified collagen.
Inventors
- 👤 Teruo Miyata
- 👤 Albert L. Rubin
- 👤 Michael W. Dunn
- 👤 Kurt H. Stenzel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:58
CPC Classifications
G; G02; G02C; G02C7/00; G02C7/02; G02C7/04; A; A61; A61L; A61L27/00; A61L27/14; A61L27/22; A61L27/24; G02B; G02B1/00; G02B1/04; G02B1/041; G02B1/043; A61F; A61F2310/00; A61F2310/00005; A61F2310/00365; Y; Y10; Y10S; Y10S128/00; Y10S128/08
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
33 words
As an article of manufacture a soft contact lens consisting of a lens-shaped, subsequently cross-linked gel of solubilized, defatted, 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 cross-linked gel of solubilized, defatted, 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 lens-shaped collagen gel is chemically cross-linked.
Claim 4
Dependent Claim
34 words
As an article of manufacture a soft contact lens consisting of a lens-shaped, subsequently cross-linked gel of enzyme-solubilized, telopeptide-poor, defatted collagen, said gel comprising 1.0 to 30.0 wt. % collagen and the balance water.
Claim 5
Dependent Claim
34 words
As an article of manufacture a soft contact lens consisting of a lens-shaped, subsequently cross-linked gel of enzyme-solubilized, telopeptide-poor, defatted collagen, said gel comprising 1.0 to 30.0 wt. % collagen and the balance water.
Claim 6
Dependent Claim
19 words
A soft contact lens of claim 3 in which the collagen gel content is 1 to 20 wt. %.
Claim 7
Dependent Claim
19 words
A soft contact lens of claim 3 in which the collagen gel content is 5 to 12 wt. %.
Claim 8
Dependent Claim
14 words
A soft contact lens of claim 3 in which the collagen is chemically-modified collagen.
Claim 9
Dependent Claim
14 words
A soft contact lens of claim 6 in which the collagen is esterified collagen.
Claim 10
Dependent Claim
14 words
A soft contact lens of claim 7 in which the collagen is methylated collagen.
Claim 11
Dependent Claim
14 words
A soft contact lens of claim 6 in which the collagen is acylated collagen.
Claim 12
Dependent Claim
14 words
A soft contact lens of claim 9 in which the collagen is succinylated collagen.
Claim 13
Independent Claim
59 words
A method for the manufacture of a soft contact lens which comprises solubilizing collagen from a source thereof to produce a collagen extract, removing fatty constituents from the extract, converting the extracted and defatted collagen to form a transparent gel having a collagen concentration of 1-30 wt. % forming said contact lens of such gel and cross-linking the lens.
Claim 14
Independent Claim
59 words
A method for the manufacture of a soft contact lens which comprises solubilizing collagen from a source thereof to produce a collagen extract, removing fatty constituents from the extract, converting the extracted and defatted collagen to form a transparent gel having a collagen concentration of 1-30 wt. % forming said contact lens of such gel and cross-linking the lens.
Claim 15
Dependent Claim
14 words
A method according to claim 11 in which the lens-shaped gel is chemically cross-linked.
Claim 16
Independent Claim
65 words
A method for the manufacture of a soft contact lens which comprises treating a source of collagen with a proteolytic enzyme to produce an extract of telopeptide-poor collagen, removing fatty constituents from the extract, converting the extracted, defatted collagen to form a transparent gel having a collagen concentration of 1 to 30 wt. %, forming said contact lens of such gel, and cross-linking the lens.
Claim 17
Independent Claim
65 words
A method for the manufacture of a soft contact lens which comprises treating a source of collagen with a proteolytic enzyme to produce an extract of telopeptide-poor collagen, removing fatty constituents from the extract, converting the extracted, defatted collagen to form a transparent gel having a collagen concentration of 1 to 30 wt. %, forming said contact lens of such gel, and cross-linking the lens.
Claim 18
Dependent Claim
23 words
A process according to claim 13 in which the cross-linking is carried out by irradiation with gamma rays in the presence of nitrogen.
Claim 19
Dependent Claim
26 words
The process of claim 13 in which the collagen concentration of the gel is in the range of 1% to 30% with the balance being water.
Claim 20
Dependent Claim
19 words
The process of claim 13 in which the transparent gel is formed into a lens in a lens mold.
Claim 21
Dependent Claim
17 words
A process according to claim 13 in which the collagen is succinylated prior to shaping and cross-linking.
Claim 22
Dependent Claim
17 words
A process according to claim 13 in which the collagen is methylated prior to shaping and cross-linking.
References Cited (Backward Citations)
US2920000A
Cited
US3530037A
Cited
US3443261A
Cited
US3760045A
Cited
US3955012A
Cited
US3738913A
Cited
JPS4939174A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-09-23 | 1984-03-24 | 1984-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-23 | 1988-03-24 | 1988-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-23 | 1992-03-24 | 1992-09-23 | $7700.00 | Window Closed / Lapsed |