US5076683A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spuncast compound contact lens
Assignee: Hydron Ltd
•
Filing: 1988-09-14
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Granted: 1991-12-31
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Expires: 2008-09-14
Abstract
Abstract A reproducibly-made, wholly spuncast, non-truncated ballasted, compound surfaced soft contact lens and the method of making the same by spincasting a polymer forming monomer mixture.
Inventors
- 👤 Robert E. Glick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:14
CPC Classifications
B; B29; B29D; B29D11/00; B29D11/00009; B29D11/00038; B29D11/00115; B29C; B29C41/00; B29C41/02; B29C41/04; B29C41/042; B29C41/045; B29K; B29K2105/00; B29K2105/0002; B29L; B29L2011/00; B29L2011/0016; B29L2011/0025; B29L2011/0033
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
44 words
A reproducibly-made, wholly spuncasted, non-truncated, ballasted soft contact lens containing a compound anterior surface, a thickness profile that is asymmetical with respect to its geometric center to provide a prismatic lens with the central axis of its posterior surface symmetrical to its peripheral edge.
Claim 2
Dependent Claim
44 words
A reproducibly-made, wholly spuncasted, non-truncated, ballasted soft contact lens containing a compound anterior surface, a thickness profile that is asymmetical with respect to its geometric center to provide a prismatic lens with the central axis of its posterior surface symmetrical to its peripheral edge.
References Cited (Backward Citations)
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US4095878A
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US4256369A
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US4434113A
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US4618227A
Cited
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GB2160677A
Cited
US4874234A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-12-30 | 1995-07-01 | 1995-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-12-30 | 1999-07-01 | 1999-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-12-30 | 2003-07-01 | 2003-12-31 | $7700.00 | Window Closed / Lapsed |