Patent US5403901A successfully refreshed from Google Patents.
US5403901A
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Flexible, high refractive index polymers
Assignee: Nestle SA
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Filing: 1993-11-24
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Granted: 1995-04-04
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Expires: 2013-11-24
Abstract
Abstract High refractive index copolymers comprised of monomers having the formula: ##STR1## wherein X is H or CH 3 ; m is 0-10; Y is nothing, O, S, or NR wherein R is H, CH 3 , C n H 2n+1 (n=1-10) iso OC 3 H 7 , C 6 H 5 , or CH 2 C 6 H 5 ; Ar is an aromatic ring which is unsubstituted or substituted with H, CH 3 , C 2 H 5 , n-C 3 H 7 , iso-C 3 H 7 , OCH 3 , C 6 H 11 , Cl, Br, C 6 H 5 or CH 2 C 6 H 5 ; and n is 1-5; and a cross linking monomer having a plurality of polymerizable ethylenically unsaturated groups are disclosed. Intraocular lenses made of the copolymers which can be inserted into an aphakic eye through a relatively small incision are also disclosed.
Inventors
- 👤 Farhad H. Namdaran
- 👤 Albert R. LeBoeuf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:47
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/14; A61F2/16; A61F2/1613; A61F2/1616; A61L; A61L27/00; A61L27/14; A61L27/16; B; B29; B29D; B29D11/00; B29D11/02; B29D11/023; C; C08; C08F; C08F220/00; C08F220/02; C08F220/10; C08F220/12; C08F220/16; C08F220/18; C08F220/1808; C08F220/1809; C08F220/26; C08F220/30; C08F220/301; G; G02; G02B; G02B1/00; G02B1/04; G02B1/041; G02B1/043; A61L2430/00; A61L2430/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
43 words
A copolymer comprising 2-phenylethyl acrylate at a concentration of about 65 wt. %; 2-phenylethyl methacrylate at a concentration of about 30 wt. %; 1,4-butanediol diacrylate at a concentration of about 3.2 wt. % and 2-(-3'-methallyl-2'-hydroxy-5'-methylphenyl)benzotriazole at a concentration of about 1.8 wt. %.
Claim 2
Dependent Claim
43 words
A copolymer comprising 2-phenylethyl acrylate at a concentration of about 65 wt. %; 2-phenylethyl methacrylate at a concentration of about 30 wt. %; 1,4-butanediol diacrylate at a concentration of about 3.2 wt. % and 2-(-3'-methallyl-2'-hydroxy-5'-methylphenyl)benzotriazole at a concentration of about 1.8 wt. %.
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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) | 1998-04-03 | 1998-10-03 | 1999-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-04-03 | 2002-10-03 | 2003-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-04-03 | 2006-10-03 | 2007-04-04 | $7700.00 | Window Closed / Lapsed |