US5041510A
Expired / Lapsed
US
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Acrylic copolymers exhibiting nonlinear optical response
Assignee: Hoechst Celanese Chemical Co
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Filing: 1990-02-07
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Granted: 1991-08-20
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Expires: 2010-02-07
Abstract
Abstract This invention provides novel side chain copolymers which exhibit nonlinear optical response, and which have utility as a transparent optical component in all-optical and electrooptical light switch and light modulator devices. An invention side chain copolymer is illustrated by the following structure: ##STR1##
Inventors
- 👤 Diane Allen
- 👤 Cherylyn Lee
- 👤 Ronald N. DeMartino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:29
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/35; G02F1/355; G02F1/361; G02F1/3615; G02F1/3617; C; C08; C08F; C08F20/00; C08F20/02; C08F20/10; C08F20/34; C08F20/36; C08F20/38
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
76 words
An isotropic acrylic copolymer which is characterized by recurring monomeric units corresponding the the formula: ##STR9## where R is hydrogen or a C 1 -C 4 alkyl substituent; R 1 is a C 1 -C 6 alkyl substituent; m and m 1 are integers which total at least 10; n is an integer between about 1-20; and A is --SO 2 CF 3 , ##STR10## and X is --H, --CN, --NO 2 or --CF 3 .
Claim 2
Dependent Claim
76 words
An isotropic acrylic copolymer which is characterized by recurring monomeric units corresponding the the formula: ##STR9## where R is hydrogen or a C 1 -C 4 alkyl substituent; R 1 is a C 1 -C 6 alkyl substituent; m and m 1 are integers which total at least 10; n is an integer between about 1-20; and A is --SO 2 CF 3 , ##STR10## and X is --H, --CN, --NO 2 or --CF 3 .
Claim 3
Dependent Claim
21 words
An acrylic copolymer in accordance with claim 1 which has a weight average molecular weight in the range between about 5000-200,000.
Claim 4
Dependent Claim
21 words
An acrylic copolymer in accordance with claim 1 which has a glass transition temperature in the range between about 40°-150° C.
References Cited (Backward Citations)
US4882402A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-08-19 | 1995-02-18 | 1995-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-08-19 | 1999-02-18 | 1999-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-08-19 | 2003-02-18 | 2003-08-20 | $7700.00 | Window Closed / Lapsed |