US4640805A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of selectively tinting cast lenses
Assignee: Ciba Vision Corp
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Filing: 1985-10-07
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Granted: 1987-02-03
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Expires: 2005-10-07
Abstract
Abstract A method of coloring predetermined areas of cast contact lenses by placing a coating of soluble dye on the mold surface in the area to be colored. The liquid lens monomer is added to the mold and dissolves the dye from the mold surface before being polymerized to form a solid contact lens. After being polymerized the lens containing the dye in its polymer structure is removed from the mold.
Inventors
- 👤 Charles W. Neefe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:50
CPC Classifications
B; B29; B29D; B29D11/00; B29D11/00009; B29D11/00471; B29C; B29C39/00; B29C39/02; B29C39/04; B29C39/08; B29D11/00038; B29D11/00317; B29D11/00865; B29D11/00894; B29D11/00903; B29C37/00; B29C37/0025; B29C37/0028; B29C37/0032; Y; Y10; Y10S; Y10S425/00; Y10S425/808
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
133 words
A method of coloring selected areas of spin cast contact lenses by the steps of providing a concave spin cast mold having a concave radius equal to the convex lens radius, placing a dye soluble in the lens monomer on the selected areas of the concave mold surface, placing the liquid lens monomer on the concave spin cast mold surface, rotating the spin cast mold around the lens optical axis and perpendicular to the concave spin cast mold surface, allowing the liquid lens monomer to dissolve the soluble dye present on the concave mold surface, allowing the liquid lens monomer containing the soluble dye to polymerize and form a solid contact lens and the dye being contained within the selected areas of the lens, removing the colored lens from the spin cast mold.
Claim 2
Independent Claim
133 words
A method of coloring selected areas of spin cast contact lenses by the steps of providing a concave spin cast mold having a concave radius equal to the convex lens radius, placing a dye soluble in the lens monomer on the selected areas of the concave mold surface, placing the liquid lens monomer on the concave spin cast mold surface, rotating the spin cast mold around the lens optical axis and perpendicular to the concave spin cast mold surface, allowing the liquid lens monomer to dissolve the soluble dye present on the concave mold surface, allowing the liquid lens monomer containing the soluble dye to polymerize and form a solid contact lens and the dye being contained within the selected areas of the lens, removing the colored lens from the spin cast mold.
Claim 3
Independent Claim
88 words
A method of casting lenses having a selected area of color by the steps of placing a colorant soluble in the liquid lens monomer on a selected area of the lens mold optical surface, adding the liquid lens monomer to the optical lens mold, allowing the liquid lens monomer to dissolve the colorant from the lens mold optical surface, allowing the liquid lens monomer to polymerize to form a solid lens containing the colorant in the selected area of the lens, removing the lens from the lens mold.
Claim 4
Independent Claim
88 words
A method of casting lenses having a selected area of color by the steps of placing a colorant soluble in the liquid lens monomer on a selected area of the lens mold optical surface, adding the liquid lens monomer to the optical lens mold, allowing the liquid lens monomer to dissolve the colorant from the lens mold optical surface, allowing the liquid lens monomer to polymerize to form a solid lens containing the colorant in the selected area of the lens, removing the lens from the lens mold.
Claim 5
Independent Claim
89 words
A method of casting lenses having a selected area of color by the steps of placing a colored pigment soluble in the liquid lens monomer on a selected area of the lens mold optical surface, adding the liquid lens monomer to the optical lens mold, allowing the liquid lens monomer to dissolve the colored pigment from the mold optical surface, allowing the liquid lens monomer to polymerize to form a solid lens containing the colored pigment in the selected area of the lens, removing the lens from the mold.
Claim 6
Independent Claim
89 words
A method of casting lenses having a selected area of color by the steps of placing a colored pigment soluble in the liquid lens monomer on a selected area of the lens mold optical surface, adding the liquid lens monomer to the optical lens mold, allowing the liquid lens monomer to dissolve the colored pigment from the mold optical surface, allowing the liquid lens monomer to polymerize to form a solid lens containing the colored pigment in the selected area of the lens, removing the lens from the mold.
Claim 7
Dependent Claim
16 words
The subject matter set forth in claim 1 wherein the dye is replaced with a pigment.
Claim 8
Dependent Claim
17 words
The subject matter set forth in claim 1 wherein the dye is replaced with a fluorescent pigment.
Claim 9
Dependent Claim
12 words
A method as in claim 2 wherein the colorant is a dye.
Claim 10
Dependent Claim
12 words
A method as in claim 2 wherein the colorant is a pigment.
Claim 11
Dependent Claim
13 words
A method as in claim 2 wherein the colorant is a fluorescent pigment.
Claim 12
Dependent Claim
14 words
A method as in claim 3 wherein the pigment is replaced with a dye.
Claim 13
Dependent Claim
15 words
A method as in claim 3 wherein the pigment is replaced with a fluorescent pigment.
Claim 14
Dependent Claim
26 words
A method as in claim 1 wherein a transparent dye is placed in the central pupil area and a pigment is placed in the iris area.
Claim 15
Dependent Claim
26 words
A method as in claim 2 wherein a transparent dye is placed in the central pupil area and a pigment is placed in the iris area.
Claim 16
Dependent Claim
26 words
A method as in claim 3 wherein a transparent dye is placed in the central pupil area and a pigment is placed in the iris area.
Claim 17
Dependent Claim
27 words
A method as in claim 1 wherein a transparent dye is placed in the central pupil area and a fluorescent pigment is placed in the iris area.
Claim 18
Dependent Claim
27 words
A method as in claim 2 wherein a transparent dye is placed in the central pupil area and a fluorescent pigment is placed in the iris area.
Claim 19
Dependent Claim
27 words
A method as in claim 3 wherein a transparent dye is placed in the central pupil area and a fluorescent pigment is placed in the iris area.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-02-02 | 1990-08-04 | 1991-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-02 | 1994-08-04 | 1995-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-02 | 1998-08-04 | 1999-02-03 | $7700.00 | Window Closed / Lapsed |