Patent US4400333A successfully refreshed from Google Patents.
US4400333A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of oxygen permeable contact lenses
Assignee: NEEFE OPTICAL LABORATORY
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Filing: 1981-12-03
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Granted: 1983-08-23
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Expires: 2001-12-03
Abstract
Abstract This invention relates to a method for correcting visual refractive errors of the human eye. In this method, a contact lens is fitted to the patient's eye, the lens being oxygen permeable, wettable, and having an oxygen permeable crosslinking agent.
Inventors
- 👤 Charles W. Neefe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:14
CPC Classifications
G; G02; G02B; G02B1/00; G02B1/04; G02B1/041; B; B29; B29C; B29C33/00; B29C33/56; B29C33/60; B29C33/62; B29C33/64; B29C69/00; B29C69/001; B29D; B29D11/00; B29D11/00009; B29D11/00019; B29D11/00038; B29D11/00076; B29D11/00413; B29D11/00432; B29D11/00442; B29D11/00932; B29D11/00942; B29C35/00; B29C35/02; B29C35/08; B29C35/0805; B29C2035/0827; B29C2793/00; B29C2793/009; B29C39/00; B29C48/00; B29C48/001; B29C48/0011; B29C48/03; B29C48/12; B29K; B29K2033/00; B29K2033/04; B29K2823/00; B29K2877/00; B29L; B29L2011/00; B29L2011/0016; B29L2011/0041
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
57 words
A method of correcting refractive errors of the eye by the steps of copolymerizing 1,1,1tris(trimethylsiloxy)methacryloxypropylsilane and methylmethacrylate monomer with the oxygen permeable crosslinker Bis(methacryloxypropyl)tetramethyldisiloxane to form an oxygen permeable transparent solid copolymer, cutting and polishing the surfaces of the transparent permeable crosslinked copolymer to form a correcting lens to be worn on the cornea of the eye.
Claim 2
Independent Claim
57 words
A method of correcting refractive errors of the eye by the steps of copolymerizing 1,1,1tris(trimethylsiloxy)methacryloxypropylsilane and methylmethacrylate monomer with the oxygen permeable crosslinker Bis(methacryloxypropyl)tetramethyldisiloxane to form an oxygen permeable transparent solid copolymer, cutting and polishing the surfaces of the transparent permeable crosslinked copolymer to form a correcting lens to be worn on the cornea of the eye.
Claim 3
Independent Claim
57 words
A method of correcting refractive errors of the eye by the steps of copolymerizing 1,1,1tris(trimethylsiloxy)methacryloxypropylsilane and methylmethacrylate monomer with the oxygen permeable crosslinker Bis(3-glycidoxypropyl)tetramethyldisiloxane to form an oxygen permeable transparent solid copolymer, cutting and polishing the surfaces of the transparent permeable crosslinked copolymer to form a correcting lens to be worn on the cornea of the eye.
Claim 4
Independent Claim
57 words
A method of correcting refractive errors of the eye by the steps of copolymerizing 1,1,1tris(trimethylsiloxy)methacryloxypropylsilane and methylmethacrylate monomer with the oxygen permeable crosslinker Bis(3-glycidoxypropyl)tetramethyldisiloxane to form an oxygen permeable transparent solid copolymer, cutting and polishing the surfaces of the transparent permeable crosslinked copolymer to form a correcting lens to be worn on the cornea of the eye.
Claim 5
Independent Claim
51 words
A method of correcting refractive errors of the eye by the steps of copolymerizing methylmethacrylate monomer with the oxygen permeable crosslinker Bis(3-glycidoxypropyl) tetramethyldisiloxane to form an oxygen permeable transparent solid copolymer, shaping the transparent permeable crosslinked copolymer to form a correcting lens to be worn on the cornea of the eye.
Claim 6
Independent Claim
51 words
A method of correcting refractive errors of the eye by the steps of copolymerizing methylmethacrylate monomer with the oxygen permeable crosslinker Bis(3-glycidoxypropyl) tetramethyldisiloxane to form an oxygen permeable transparent solid copolymer, shaping the transparent permeable crosslinked copolymer to form a correcting lens to be worn on the cornea of the eye.
References Cited (Backward Citations)
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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) | 1986-08-22 | 1987-02-21 | 1987-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-22 | 1991-02-21 | 1991-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-22 | 1995-02-21 | 1995-08-23 | $7700.00 | Window Closed / Lapsed |