US5135965A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrogel-forming polymers used in intraocular lenses
Assignee: TR Developments Ltd
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Filing: 1988-09-15
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Granted: 1992-08-04
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Expires: 2008-09-15
Abstract
Abstract Hydrogel-forming polymers for contact lenses and intraocular lenses having increased toughness despite high equilibrium water content comprise a hydrophilic monomer (e.g. an N-vinyl lactam) and a polyunsaturated polymeric cross-linking agent. UV-absorbers are also disclosed which are bound in the polymer structure so as to be inextractable, some undergoing photo-Fries re-arrangement on exposure to UV-radiation so as to become UV-absorbers in the re-arranged form.
Inventors
- 👤 Menashe Tahan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:28
CPC Classifications
C; C08; C08F; C08F299/00; C08F299/02; C08F299/04; C08F299/0478; C08F251/00; C08F251/02; C08F290/00; C08F290/08; G; G02; G02B; G02B1/00; G02B1/04; G02B1/041; G02B1/043
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
23 words
An intraocular lens made from a cross-linked hydrogel-forming polymer comprising at least one hydrophillic monomer and at least one polyunsaturated polymeric cross-linking agent.
Claim 2
Dependent Claim
23 words
An intraocular lens made from a cross-linked hydrogel-forming polymer comprising at least one hydrophillic monomer and at least one polyunsaturated polymeric cross-linking agent.
Claim 3
Dependent Claim
24 words
The intraocular lens of claim 1 wherein the hydrogel-forming polymer is cross-linked by said polymeric cross-linking agent in combination with a non-polymeric cross-linking agent.
Claim 4
Dependent Claim
23 words
A contact lens made from a cross-linked hydrogel-forming polymer comprising at least one hydrophillic monomer and at least one polyunsaturated polymeric cross-linking agent.
Claim 5
Dependent Claim
23 words
A contact lens made from a cross-linked hydrogel-forming polymer comprising at least one hydrophillic monomer and at least one polyunsaturated polymeric cross-linking agent.
Claim 6
Dependent Claim
24 words
The intraocular lens of claim 3 wherein the hydrogel-forming polymer is cross-linked by said polymeric cross-linking agent in combination with a non-polymeric cross-linking agent.
Claim 7
Dependent Claim
45 words
An intraocular lens made of a UV-absorbing hydrogel-forming polymer comprising at least one hydrophillic monomer and at least one polyunsaturated polymeric cross-linking agent, the polymer including units containing a UV-absorbing moiety which in the final polymer network is bound as part of the polymer structure.
Claim 8
Dependent Claim
45 words
An intraocular lens made of a UV-absorbing hydrogel-forming polymer comprising at least one hydrophillic monomer and at least one polyunsaturated polymeric cross-linking agent, the polymer including units containing a UV-absorbing moiety which in the final polymer network is bound as part of the polymer structure.
Claim 9
Dependent Claim
17 words
The intraocular lens of claim 5 wherein the hydrogel-forming polymer further comprises at least one non-hydrophillic monomer.
Claim 10
Dependent Claim
45 words
A contact lens made of a UV-absorbing hydrogel-forming polymer comprising at least one hydrophillic monomer and at least one polyunsaturated polymeric cross-linking agent, the polymer including units containing a UV-absorbing moiety which in the final polymer network is bound as part of the polymer structure.
Claim 11
Dependent Claim
45 words
A contact lens made of a UV-absorbing hydrogel-forming polymer comprising at least one hydrophillic monomer and at least one polyunsaturated polymeric cross-linking agent, the polymer including units containing a UV-absorbing moiety which in the final polymer network is bound as part of the polymer structure.
Claim 12
Dependent Claim
17 words
The contact lens of claim 7 wherein the hydrogel-forming polymer further comprises at least one non-hydrophillic monomer.
Claim 13
Dependent Claim
31 words
A moulded lens blank for use as an ocular lens following machining, the blank comprising a body of a hydrogel-forming polymer as defined in any one of claims 1 to 8.
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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) | 1995-08-04 | 1996-02-03 | 1996-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-08-04 | 2000-02-03 | 2000-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-08-04 | 2004-02-03 | 2004-08-04 | $7700.00 | Window Closed / Lapsed |