Patent US4943150A successfully refreshed from Google Patents.
US4943150A
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Method of making variable modulus lenses
Assignee: Bausch and Lomb Inc
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Filing: 1988-03-22
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Granted: 1990-07-24
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Expires: 2008-03-22
Abstract
Abstract A method for forming a contact lens comprising subjecting a soft contact lens impregnated with a polymerizable liquid composition which may be polymerized in said lens to render said lens relatively rigid and which may be polymerized upon exposure to radiation with radiation in a selected manner so as to render selected portions of said lens relatively rigid.
Inventors
- 👤 William G. Deichert
- 👤 Richard J. Wrue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:36
CPC Classifications
B; B29; B29D; B29D11/00; B29D11/00009; B29D11/00038; B29D11/00125; B29D11/00134; B29D11/00153; B29D11/00163; B29C; B29C35/00; B29C35/02; B29C35/08; G; G02; G02B; G02B1/00; G02B1/04; G02B1/041; G02B1/043; B29C35/0805; B29C2035/0827; B29C2035/0833; B29K; B29K2995/00; B29K2995/0037; B29K2995/0082
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
58 words
A method for forming a contact lens comprising: subjecting a soft contact lens impregnated with a polymerizable liquid composition which may be polymerized in said lens to render said lens relatively rigid and which may be polymerized upon exposure to radiation with radiation in a selected manner so as to render selected portions of said lens relatively rigid.
Claim 2
Independent Claim
58 words
A method for forming a contact lens comprising: subjecting a soft contact lens impregnated with a polymerizable liquid composition which may be polymerized in said lens to render said lens relatively rigid and which may be polymerized upon exposure to radiation with radiation in a selected manner so as to render selected portions of said lens relatively rigid.
Claim 3
Dependent Claim
19 words
The method of claim 1 wherein the portion of the unpolymerized polymerizable liquid composition is removed from said lens.
Claim 4
Dependent Claim
29 words
The method of claim 1 wherein an optical mask is interposed between the radiation source and said impregnated lens and controls the pattern of radiation intensity on said lens.
Claim 5
Dependent Claim
50 words
The method of claim 3 wherein said optical mask is configured so that it imposes a radiation intensity gradient on said impregnated lens having a maximum radiation intensity at the center of said lens and diminishing radiation intensity as a function of the distance from the center of said lens.
Claim 6
Dependent Claim
48 words
The method of claim 3 wherein said optical mask is configured so that it imposes a radiation gradient on said lens having a minimum of radiation intensity on the center of said lens and increasing radiation intensity as a function of distance from the center of said lens.
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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) | 1993-07-23 | 1994-01-22 | 1994-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-23 | 1998-01-22 | 1998-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-23 | 2002-01-22 | 2002-07-24 | $7700.00 | Window Closed / Lapsed |