Patent US4985179A successfully refreshed from Google Patents.
US4985179A
Expired / Lapsed
US
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Optical material
Assignee: Mitsubishi Chemical Corp
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Filing: 1989-05-31
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Granted: 1991-01-15
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Expires: 2009-05-31
Abstract
Abstract An optical material obtained by electrically polarizing a high polymer molded article obtained from a composition comprising a copolymer of vinylidene cyanide and at least one comonomer selected from vinyl compounds, other vinylidene compounds and dienes having uniformly dispersed therein from 0.1 to 70% by weight of an organic molecular crystal having nonlinear optical effects, with the total amount of the copolymer and the organic molecular crystal being 100% by weight. The optical material has excellent orientation of the organic molecular crystal, great nonlinear optical effects, and excellent moldability.
Inventors
- 👤 Iwao Seo
- 👤 Kenji Nakajima
- 👤 Manabu Kishimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:46
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/35; G02F1/355; G02F1/361; G02F1/3615
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
89 words
An optical material obtained by electrically polarizing a high polymer molded article obtained from a composition comprising an alternating copolymer of vinylidene cyanide and at least one comonomer selected from vinyl compounds and other vinylidene compounds having uniformly dispersed therein from 0.1 to 70% by weight of an organic molecular crystal having nonlinear optical effects such that the secondary molecular nonlinear susceptibility of the organic molecular crystals is at least 1×10 -3 esu, with the total amount of the copolymer and the organic molecular crystal being 100% by weight.
Claim 2
Dependent Claim
89 words
An optical material obtained by electrically polarizing a high polymer molded article obtained from a composition comprising an alternating copolymer of vinylidene cyanide and at least one comonomer selected from vinyl compounds and other vinylidene compounds having uniformly dispersed therein from 0.1 to 70% by weight of an organic molecular crystal having nonlinear optical effects such that the secondary molecular nonlinear susceptibility of the organic molecular crystals is at least 1×10 -3 esu, with the total amount of the copolymer and the organic molecular crystal being 100% by weight.
Claim 3
Dependent Claim
44 words
An optical material as claimed in claim 1, wherein said high polymer molded article is a film, sheet or fiber unaxially or biaxially stretched from 2 to 6 times based on a linear dimension of the unstretched molded article prior to the electrical polarization.
Claim 4
Dependent Claim
22 words
An optical material as claimed in claim 1, wherein said copolymer is an alternating copolymer of vinylidene cyanide and a vinyl compound.
Claim 5
Dependent Claim
49 words
An optical material as claimed in claim 1, wherein said composition comprises from 60 to 95% by weight of said copolymer and from 5 to 40% by weight of said organic molecular crystal, with the total amount of the copolymer and the organic molecular crystal being 100% by weight.
Claim 6
Dependent Claim
36 words
An optical material as claimed in claim 3, wherein said alternating copolymer comprises vinylidene cyanide and at least one vinyl compound selected from vinyl acetate, vinyl formate, vinyl pivalate, isopropenyl acetate, vinyl butyrate, and vinyl benzoate.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-01-14 | 1994-07-16 | 1995-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-01-14 | 1998-07-16 | 1999-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-01-14 | 2002-07-16 | 2003-01-15 | $7700.00 | Window Closed / Lapsed |