US4559059A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tinted contact lenses and a method for their preparation
Assignee: Ciba Vision Corp
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Filing: 1984-08-20
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Granted: 1985-12-17
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Expires: 2004-08-20
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
2026-10-23 18:48
CPC Classifications
G; G02; G02B; G02B1/00; G02B1/04; G02B1/041; G02B1/043; D; D06; D06P; D06P3/00; D06P3/008; G02C; G02C7/00; G02C7/02; G02C7/021
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
59 words
A contact lens colored over at least a portion of its surface, comprising a copolymeric hydrogel material to which at least one reactive fluorotriazine dyestuff is covalently bonded external to the polymer backbone by reaction at temperatures up to 60° C. with hydroxyl, amino, amido or mercapto groups present in said polymer, over the colored portion of the lens.
Claim 2
Dependent Claim
59 words
A contact lens colored over at least a portion of its surface, comprising a copolymeric hydrogel material to which at least one reactive fluorotriazine dyestuff is covalently bonded external to the polymer backbone by reaction at temperatures up to 60° 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
26 words
A contact lens according to claim 1 wherein the reactive fluorotriazine dyestuff is bonded to the polymer backbone by reaction at temperatures up to 50° C.
Claim 6
Dependent Claim
17 words
A contact lens according to claim 1, comprising a colored central portion and a clear annular edge.
Claim 7
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 8
Dependent Claim
53 words
A process for preparing a contact lens colored over at least a portion of its surface, comprising reacting at temperatures up to 60° C. at least one ractive fluorotriazine dyestuff with hydroxyl, amino, amido or mercapto groups present in the polymeric hydrogel contact lens material, and removing unreacted dyestuff from said lens material.
Claim 9
Dependent Claim
53 words
A process for preparing a contact lens colored over at least a portion of its surface, comprising reacting at temperatures up to 60° C. at least one ractive fluorotriazine dyestuff 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
26 words
The process according to claim 7 wherein the reactive fluorotriazine dyestuff and the polymeric hydrogel contact lens material is reacted at temperatures up to 50° C.
Claim 11
Dependent Claim
18 words
A process according to claim 7, 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 7, 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 7, wherein said hydrogel material contains hydroxy groups in the polymer.
References Cited (Backward Citations)
GB1004424A
Cited
GB1163617A
Cited
US4252421A
Cited
US4468229A
Cited
US4494954A
Cited
US4447474A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-12-16 | 1989-06-17 | 1989-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-16 | 1993-06-17 | 1993-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-16 | 1997-06-17 | 1997-12-17 | $7700.00 | Window Closed / Lapsed |