Patent US4143949A successfully refreshed from Google Patents.
US4143949A
Expired / Lapsed
US
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Process for putting a hydrophilic coating on a hydrophobic contact lens
Assignee: Bausch and Lomb Inc
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Filing: 1976-10-28
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Granted: 1979-03-13
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Expires: 1996-10-28
Abstract
Abstract The surface of a contact lens is modified by deposition of an ultrathin coating of a hydrophilic polymer under the influence of plasma glow discharge so as to integrally bond the coating to the surface of the hydrophobic lens thereby effecting a hydrophilic lens.
Inventors
- 👤 Richard Y. Chen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:22
CPC Classifications
B; B05; B05D; B05D1/00; B05D1/62; G; G02; G02B; G02B1/00; G02B1/04; G02B1/041; G02B1/043
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
125 words
An electrodeless glow discharge polymerization and coating process for making a hydrophobic contact lens into a hydrophilic contact lens consisting essentially of: (1) providing a hydrophobic, optically transparent, oxygen permeable contact lens, (2) placing the hydrophobic contact lens into a glow discharge apparatus containing an atmosphere comprising a polymerizable organic monomer consisting essentially of hydroxyalkylmethacrylates, hydroxyalkylacrylates, glycidylmethacrylate, propylene oxide and N-vinyl-2-pyrrolidone; and (3) subjecting the monomer to electromagnetic radiation sufficient to produce an electrodeless glow discharge at a pressure of about 100 to about 700 millitorr to cause the polymerizable organic monomer to polymerize and to form hydrohilic polymeric integrally bonded uniform coating from about 50A to about 20,000A thick on the hydrophobic contact lens thereby forming a hydrophilic, optically transparent, oxygen permeable contact lens.
Claim 2
Dependent Claim
125 words
An electrodeless glow discharge polymerization and coating process for making a hydrophobic contact lens into a hydrophilic contact lens consisting essentially of: (1) providing a hydrophobic, optically transparent, oxygen permeable contact lens, (2) placing the hydrophobic contact lens into a glow discharge apparatus containing an atmosphere comprising a polymerizable organic monomer consisting essentially of hydroxyalkylmethacrylates, hydroxyalkylacrylates, glycidylmethacrylate, propylene oxide and N-vinyl-2-pyrrolidone; and (3) subjecting the monomer to electromagnetic radiation sufficient to produce an electrodeless glow discharge at a pressure of about 100 to about 700 millitorr to cause the polymerizable organic monomer to polymerize and to form hydrohilic polymeric integrally bonded uniform coating from about 50A to about 20,000A thick on the hydrophobic contact lens thereby forming a hydrophilic, optically transparent, oxygen permeable contact lens.
Claim 3
Dependent Claim
16 words
The process of claim 1 wherein the electromagnetic energy has a frequency of about 15.6 megahertz.
Claim 4
Dependent Claim
21 words
The process of claim 1 wherein the atmosphere is at a pressure of from about 100 millitorr to about 500 millitorr.
Claim 5
Dependent Claim
30 words
The process of claim 1 wherein the hydrophobic contact lens is a polysiloxane polymeric material and the polymerized surface coating is selected from the group consisting of poly(2-hydroxyethylmethacrylate) and poly(N-vinyl-pyrrolidone).
References Cited (Backward Citations)
US3068510A
Cited
US3389012A
Cited
US3700573A
Cited
US3916033A
Cited
US3950315A
Cited
GB1362939A
Cited
US3943045A
Cited
US3808178A
Cited
US3900250A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-03-12 | 1982-09-11 | 1983-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-12 | 1986-09-11 | 1987-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-12 | 1990-09-11 | 1991-03-13 | $7700.00 | Window Closed / Lapsed |