US4986648A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lens and optical disc base plate obtained from copolymer of norbornyl (meth)acrylate
Assignee: Resonac Corp
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Filing: 1988-12-21
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Granted: 1991-01-22
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Expires: 2008-12-21
Abstract
Abstract An optical resin material comprising a polymer containing as an essential component at least one norbornyl acrylate or methacrylate or a derivative thereof is excellent in properties, particularly in moisture resistance and can be used for molding optical elements such as lenses, optical discs, etc.
Inventors
- 👤 Akihiro Kobayashi
- 👤 Toshiyuki Fujita
- 👤 Takayuki Saito
- 👤 Hiromasa Kawai
- 👤 Yutaka Hosoi
- 👤 Hideaki Shibata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 21:11
CPC Classifications
G; G02; G02B; G02B1/00; G02B1/04; C; C08; C08F; C08F220/00; C08F220/02; C08F220/10; C08F220/12; C08F220/16; C08F220/18; C08F220/1807; C08F220/1808
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
68 words
A lens obtained by molding an optical resin material as an essential component, said optical resin material comprising a copolymer consisting essentially of one or more unsaturated carboxylic acid esters of the formula: ##STR3## wherein R is hydrogen or a methyl group and at least one other polymerizable unsaturated monomer selected from the group consisting of monofunctional unsaturated carboxylic acid esters, aromatic vinyl compounds, N-alkylmaleimides, N-cycloalkylmaleimides and N-arylmaleimides.
Claim 2
Dependent Claim
68 words
A lens obtained by molding an optical resin material as an essential component, said optical resin material comprising a copolymer consisting essentially of one or more unsaturated carboxylic acid esters of the formula: ##STR3## wherein R is hydrogen or a methyl group and at least one other polymerizable unsaturated monomer selected from the group consisting of monofunctional unsaturated carboxylic acid esters, aromatic vinyl compounds, N-alkylmaleimides, N-cycloalkylmaleimides and N-arylmaleimides.
Claim 3
Dependent Claim
72 words
A base plate of optical discs obtained by molding an optical resin material as an essential component, said optical resin material comprising a copolymer consisting essentially of one or more unsaturated carboxylic acid esters of the formula: ##STR4## wherein R is hydrogen or a methyl group and at least one other polymerizable unsaturated monomer selected from the group consisting of monofunctional unsaturated carboxylic acid esters, aromatic vinyl compounds, N-alkylmaleimides, N-cycloalkylmaleimides and N-arylmaleimides.
Claim 4
Dependent Claim
72 words
A base plate of optical discs obtained by molding an optical resin material as an essential component, said optical resin material comprising a copolymer consisting essentially of one or more unsaturated carboxylic acid esters of the formula: ##STR4## wherein R is hydrogen or a methyl group and at least one other polymerizable unsaturated monomer selected from the group consisting of monofunctional unsaturated carboxylic acid esters, aromatic vinyl compounds, N-alkylmaleimides, N-cycloalkylmaleimides and N-arylmaleimides.
References Cited (Backward Citations)
US3243416A
Cited
JPS60115605A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-01-21 | 1994-07-23 | 1995-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-01-21 | 1998-07-23 | 1999-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-01-21 | 2002-07-23 | 2003-01-22 | $7700.00 | Window Closed / Lapsed |