Patent US4460523A successfully refreshed from Google Patents.
US4460523A
Expired / Lapsed
US
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Method of making cosmetic contact lenses
Assignee: Halcon SD Group Inc
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Filing: 1983-03-14
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Granted: 1984-07-17
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Expires: 2003-03-14
Abstract
Abstract A method of making cosmetic contact lenses which alter the apparent color of the iris by employing small light reflecting particles imbedded in a colored transparent matrix. Cosmetic contact lenses as described herein are of a dual purpose to correct the visual errors and change the apparent color of the eye. The material iris pattern is visible through the lens providing a natural appearance.
Inventors
- 👤 Charles W. Neefe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:08
CPC Classifications
B; B29; B29D; B29D11/00; B29D11/00009; B29D11/00038; G; G02; G02B; G02B1/00; G02B1/04; G02B1/041; G02B1/043; B29D11/00317; B29D11/00605; B29D11/00865; B29D11/00894; B29D11/00913; B29D11/00932; G02C; G02C7/00; G02C7/02; G02C7/021; G02C7/04; G02C7/046; B29K; B29K2709/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
114 words
A method of making a cosmetic contact lens blank by the steps of forming an open ended cylinder having an inside diameter equal to the size of the desired lens pupil and an outside diameter equal to the size of the desired lens iris, the cylinder being made from a selected transparent monomer, a transparent colorant and reflecting particles, the mixture is allowed to polymerize in a mold to form the cylinder, the cylinder is filled with a mixture of the transparent monomer and the said transparent colorant and allowed to polymerize, a larger cylinder of transparent monomer is cast around the first cylinder and allowed to polymerize, the cylinder is cut into discs.
Claim 2
Independent Claim
114 words
A method of making a cosmetic contact lens blank by the steps of forming an open ended cylinder having an inside diameter equal to the size of the desired lens pupil and an outside diameter equal to the size of the desired lens iris, the cylinder being made from a selected transparent monomer, a transparent colorant and reflecting particles, the mixture is allowed to polymerize in a mold to form the cylinder, the cylinder is filled with a mixture of the transparent monomer and the said transparent colorant and allowed to polymerize, a larger cylinder of transparent monomer is cast around the first cylinder and allowed to polymerize, the cylinder is cut into discs.
Claim 3
Dependent Claim
13 words
A method as in claim 1 wherein the selected monomer is hydroxyethyl methacrylate.
Claim 4
Dependent Claim
17 words
A method as in claim 1 wherein the colorant is F D and C Green Number 6.
Claim 5
Dependent Claim
16 words
A method as in claim 1 wherein the light reflecting particles are finely ground oyster shells.
Claim 6
Dependent Claim
16 words
A method as in claim 1 wherein anitmicrobial agents are added to the monomer before polymerization.
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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) | 1987-07-17 | 1988-01-16 | 1988-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-17 | 1992-01-16 | 1992-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-17 | 1996-01-16 | 1996-07-17 | $7700.00 | Window Closed / Lapsed |