Patent JPS5366376A successfully refreshed from Google Patents.
Patent US4447474A successfully refreshed from Google Patents.
US4447474A
Expired / Lapsed
US
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Method of selectively tinting soft contact lenses
Assignee: Sunsoft Corp
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Filing: 1982-08-30
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Granted: 1984-05-08
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Expires: 2002-08-30
Abstract
Abstract A method of tinting specific areas of soft contact lenses by placing the dye in a dye carrier made of a porous material of the size and shape of the area to be tinted. The soft lens is placed on the dye carrier and absorbs the dye in the selected pattern.
Inventors
- 👤 Charles W. Neefe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:15
CPC Classifications
B; B29; B29D; B29D11/00; B29D11/00865; B29D11/00894; B29D11/00903; B05; B05D; B05D1/00; B05D1/28; B05D5/00; B05D5/06; B05D7/00; B05D7/02; B05D7/04; G; G02; G02C; G02C7/00; G02C7/02; G02C7/021; B29L; B29L2011/00; B29L2011/0016; B29L2011/0041
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
133 words
A method of coloring selected portions of a soft contact lens by the steps of providing an impervious lens support, substantially the size and shape of the contact lens to be colored, placing an absorbent dye carrier material of a size and shape equal to the lens area to be colored in the surface of the lens support, allowing a liquid colorant to be absorbed into the absorbent dye carrier material, providing an uncolored central circular pupil area and an uncolored peripheral area, placing the lens surface in contact with the surface of the lens support and the dye carrier material, allowing the colorant present in the dye carrier material to be absorbed into the lens at the selected lens area and chemically reacting the dye substance to render it insoluble and permanent.
Claim 2
Independent Claim
133 words
A method of coloring selected portions of a soft contact lens by the steps of providing an impervious lens support, substantially the size and shape of the contact lens to be colored, placing an absorbent dye carrier material of a size and shape equal to the lens area to be colored in the surface of the lens support, allowing a liquid colorant to be absorbed into the absorbent dye carrier material, providing an uncolored central circular pupil area and an uncolored peripheral area, placing the lens surface in contact with the surface of the lens support and the dye carrier material, allowing the colorant present in the dye carrier material to be absorbed into the lens at the selected lens area and chemically reacting the dye substance to render it insoluble and permanent.
Claim 3
Dependent Claim
12 words
A method as in claim 1 wherein the lens support is flat.
Claim 4
Dependent Claim
12 words
A method as in claim 1 wherein the lens support is convex.
Claim 5
Dependent Claim
12 words
A method as in claim 1 wherein the lens support is concave.
Claim 6
Dependent Claim
25 words
A method as in claim 1 wherein multiple lens supports having different colors and different shaped dye carrier materials are used to color one lens.
References Cited (Backward Citations)
US4157892A
Cited
US4329378A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-05-08 | 1987-11-07 | 1988-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-08 | 1991-11-07 | 1992-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-08 | 1995-11-07 | 1996-05-08 | $7700.00 | Window Closed / Lapsed |