Patent US4468229A successfully refreshed from Google Patents.
US4468229A
Expired / Lapsed
US
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Tinted contact lenses and a method for their preparation with reactive dyes
Assignee: Ciba Vision Corp
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Filing: 1982-06-01
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Granted: 1984-08-28
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Expires: 2002-06-01
Abstract
Abstract Contact lenses comprising polymeric lens materials in which reactive dyestuffs have been covalently bonded to monomer units of the polymer backbone, said reactive dyestuffs being reactive dyes capable of forming ether linkages with cellulose and reactive with hydroxyl, amino, amido or mercapto groups present in a hydrogel polymer to form the covalent bond therewith. The invention is of particular interest in the area of so-called hydrophilic or "soft" contact lenses, commonly referred to as hydrogel lenses.
Inventors
- 👤 Kai C. Su
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:06
CPC Classifications
D; D06; D06P; D06P3/00; D06P3/008; G; G02; G02B; G02B1/00; G02B1/04; G02B1/041; G02B1/043; G02C; G02C7/00; G02C7/02; G02C7/021
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
107 words
A contact lens colored over at least a portion of its surface, comprising a copolymeric hydrogel material to which at least one reactive dyestuff of the formula ##STR11## wherein D is the radical of an organic dyestuff radical; R is a divalent organic electron attracting group capable of causing electron withdrawal of the C carbon atoms, thus activating the same; X is hydrogen or halo; and Y is leaving group; or mixtures thereof, is covalently bonded external to the polymer backbone by reaction at temperatures up to 40° C. with hydroxyl, amino, amido or mercapto groups present in said polymer, over the colored portion of the lens.
Claim 2
Dependent Claim
107 words
A contact lens colored over at least a portion of its surface, comprising a copolymeric hydrogel material to which at least one reactive dyestuff of the formula ##STR11## wherein D is the radical of an organic dyestuff radical; R is a divalent organic electron attracting group capable of causing electron withdrawal of the C carbon atoms, thus activating the same; X is hydrogen or halo; and Y is leaving group; or mixtures thereof, is covalently bonded external to the polymer backbone by reaction at temperatures up to 40° C. with hydroxyl, amino, amido or mercapto groups present in said polymer, over the colored portion of the lens.
Claim 3
Dependent Claim
25 words
A contact lens according to claim 1, wherein said reactive dyestuff is covalently bonded by nucleophilic addition to said hydroxyl, amino, amido or mercapto groups.
Claim 4
Dependent Claim
17 words
A contact lens according to claim 1, wherein said hydrogel material contains hydroxy groups in the polymer.
Claim 5
Dependent Claim
62 words
A contact lens according to claim 1, wherein said reactive dyestuff is of the formula ##STR12## wherein D is the radical of an organic dyestuff radical; R is a divalent organic electron attracting group capable of causing electron withdrawal of the C carbon atoms, thus activating the same; X is hydrogen or halo; and Y is a leaving group; or mixtures thereof.
Claim 6
Dependent Claim
21 words
A contact lens according to claim 4, wherein D is the radical of an azo, phthalocyanine, azomethine, nitro or anthraquinone dye.
Claim 7
Dependent Claim
17 words
A contact lens according to claim 1, comprising a colored central portion and a clear annular edge.
Claim 8
Dependent Claim
28 words
A contact lens according to claim 1, wherein the colored portion thereof has a light transmission of 90% or less in a segment of the visible light range.
Claim 9
Dependent Claim
102 words
A process for preparing a contact lens colored over at least a portion of its surface, comprising reacting at temperatures up to 40° C. at least one reactive dyestuff of the formula ##STR13## wherein D is the radical of an organic dyestuff radical; R is a divalent organic electron attracting group capable of causing electron withdrawal of the C carbon atoms, thus activating the same; X is hydrogen or halo; and Y is a leaving group; or mixtures thereof with hydroxyl, amino, amido or mercapto groups present in the polymeric hydrogel contact lens material, and removing unreacted dyestuff from said lens material.
Claim 10
Dependent Claim
102 words
A process for preparing a contact lens colored over at least a portion of its surface, comprising reacting at temperatures up to 40° C. at least one reactive dyestuff of the formula ##STR13## wherein D is the radical of an organic dyestuff radical; R is a divalent organic electron attracting group capable of causing electron withdrawal of the C carbon atoms, thus activating the same; X is hydrogen or halo; and Y is a leaving group; or mixtures thereof with hydroxyl, amino, amido or mercapto groups present in the polymeric hydrogel contact lens material, and removing unreacted dyestuff from said lens material.
Claim 11
Dependent Claim
18 words
A process according to claim 8, wherein said lens material is in the form of a contact lens.
Claim 12
Dependent Claim
31 words
A process according to claim 9, wherein the reaction is conducted in an aqueous medium having a pH of at least 9 and at a temperature of up to 40° C.
Claim 13
Dependent Claim
19 words
A process according to claim 9, wherein the reactive dyestuff is applied to only a portion of said lens.
Claim 14
Dependent Claim
25 words
A process according to claim 8, wherein said dyestuff reacts by nucleophilic addition to said hydroxyl, amino, amido or mercapto groups in the hydrogel material.
Claim 15
Dependent Claim
16 words
A process according to claim 8, wherein said hydrogel material contains hydroxy groups in the polymer.
Claim 16
Dependent Claim
61 words
A process according to claim 8, wherein said reactive dyestuff is of the formula ##STR14## wherein D is the radical of an organic dyestuff radical; R is a divalent organic electron attracting group capable of causing electron withdrawal of the C carbon atoms, thus activating the same; X is hydrogen or halo; and Y is a leaving group; or mixtures thereof.
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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) | 1987-08-28 | 1988-02-27 | 1988-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-28 | 1992-02-27 | 1992-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-28 | 1996-02-27 | 1996-08-28 | $7700.00 | Window Closed / Lapsed |