US4780515A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous-wear lenses having improved physical properties
Assignee: B&L International Holdings Corp
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Filing: 1987-02-05
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Granted: 1988-10-25
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Expires: 2007-02-05
Abstract
Abstract The physical properties of highly oxygen-permeable continuous-wear contact lenses, comprising a copolymer of an organosilicone monomer, a fluoroalkyl ester monomer and a hydrophilic monomer, are improved by the further addition of a linear polysiloxane oligomeric cross-linking agent with or without neopentylglycol dimethacrylate.
Inventors
- 👤 William G. Deichert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:01
CPC Classifications
G; G02; G02B; G02B1/00; G02B1/04; G02B1/041; G02B1/043; C; C08; C08F; C08F220/00; C08F220/02; C08F220/10; C08F220/22; C08F230/00; C08F230/04; C08F230/08
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
236 words
A polymerization product of: (a) about 30 to about 80 weight % of at least one fluoroorgano monomer having the formula ##STR6## wherein R 1 is a hydrogen atom or a methyl group and Y is a fluorocarbon group having about 2 to about 10 carbon atoms and about 3 to about 21 fluorine atoms; (b) about 15 to about 50 weight % of at least one siloxyl alkyl ester having the formula ##STR7## wherein R 1 is as described above, each R 2 is independently selected from the group consisting of methyl and phenyl groups, and a is 1, 3 or 4; (c) about 4 to about 20 weight % of a member of the group consisting of: (i) at least one poly(organosiloxane) monomer having the formula ##STR8## wherein A is an activated unsaturated group, R 3 is a divalent hydrocarbon radical having from 1 to 22 carbon atoms, each R 4 and R 5 is independently selected from the group consisting of a monovalent hydrocarbon radical or a halogen-substituted monovalent hydrocarbon radical having 1-12 carbon atoms, and b is 0 or greater, and (ii) mixtures of said poly(organosiloxane) monomers and at least one optional crosslinking monomer having the formula ##STR9## wherein R 1 is as defined above and R 6 is a divalent hydrocarbon radical having 2-12 carbon atoms; and (d) about 1 to about 15 weight % of at least one hydrophilic monomer.
Claim 2
Dependent Claim
236 words
A polymerization product of: (a) about 30 to about 80 weight % of at least one fluoroorgano monomer having the formula ##STR6## wherein R 1 is a hydrogen atom or a methyl group and Y is a fluorocarbon group having about 2 to about 10 carbon atoms and about 3 to about 21 fluorine atoms; (b) about 15 to about 50 weight % of at least one siloxyl alkyl ester having the formula ##STR7## wherein R 1 is as described above, each R 2 is independently selected from the group consisting of methyl and phenyl groups, and a is 1, 3 or 4; (c) about 4 to about 20 weight % of a member of the group consisting of: (i) at least one poly(organosiloxane) monomer having the formula ##STR8## wherein A is an activated unsaturated group, R 3 is a divalent hydrocarbon radical having from 1 to 22 carbon atoms, each R 4 and R 5 is independently selected from the group consisting of a monovalent hydrocarbon radical or a halogen-substituted monovalent hydrocarbon radical having 1-12 carbon atoms, and b is 0 or greater, and (ii) mixtures of said poly(organosiloxane) monomers and at least one optional crosslinking monomer having the formula ##STR9## wherein R 1 is as defined above and R 6 is a divalent hydrocarbon radical having 2-12 carbon atoms; and (d) about 1 to about 15 weight % of at least one hydrophilic monomer.
Claim 3
Dependent Claim
11 words
The product of claim 1 wherein each R 2 is methyl.
Claim 4
Dependent Claim
17 words
The product of claim 2 wherein A is selected from the group consisting of methacryloxy and acryloxy.
Claim 5
Dependent Claim
20 words
The product of claim 3 wherein R 3 is a linear, divalent hydrocarbon radical having 3 or 4 carbon atoms.
Claim 6
Dependent Claim
15 words
The product claim 2 wherein each R 4 and R 5 is a methyl radical.
Claim 7
Dependent Claim
16 words
The product of claim 4 wherein each R 4 and R 5 is a methyl radical.
Claim 8
Dependent Claim
23 words
The product of claim 2 wherein each R 4 and R 5 is selected from the group consisting of methyl and fluoromethyl radicals.
Claim 9
Dependent Claim
13 words
The product of claim 2 wherein b is about 10 to about 30.
Claim 10
Dependent Claim
21 words
The product of claim 1 wherein said fluoroorgano monomer is selected from the group consisting of hexafluoroisopropyl methacrylate and trifluoroethyl methacrylate.
Claim 11
Dependent Claim
12 words
The product of claim 6 wherein said fluroorgano monomer is 1,1,1,3,3,3-hexafluoroisopropyl methacrylate.
Claim 12
Dependent Claim
11 words
The product of claim 10 wherein each R 1 is methyl.
Claim 13
Dependent Claim
14 words
The product of claim 2 wherein said optional crosslinking monomer is neopentyl glycol dimethacrylate.
Claim 14
Dependent Claim
12 words
The product of claim 2 wherein said hydrophilic monomer is methacrylic acid.
Claim 15
Dependent Claim
49 words
The product of claim 1 formed by polymerizing about 40 to about 70 weight % of monomer (a), about 20 to about 40 weight % of monomer (b), about 7 to about 15 weight % of monomer (c), and about 2 to about 10 weight % of monomer (d).
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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) | 1991-10-25 | 1992-04-25 | 1992-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-25 | 1996-04-25 | 1996-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-25 | 2000-04-25 | 2000-10-25 | $7700.00 | Window Closed / Lapsed |