US4933112A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Side chain liquid crystalline polymers exhibiting nonlinear optical properties
Assignee: CNA Holdings LLC
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Filing: 1989-03-14
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Granted: 1990-06-12
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Expires: 2009-03-14
Abstract
Abstract This invention provides novel sidechain liquid crystalline polymers which exhibit nonlinear response, and which have utility as a transparent nonlinear optical component in optical light switch and light modular devices. An invention sidechain liquid crystalline polymer is illustrated by poly[4-(8-hydroxyoctyloxybenzylideneamino)-4'-nitrostilbene methacrylate]: ##STR1##
Inventors
- 👤 Ronald N. DeMartino
- 👤 Hyun-Nam Yoon
- 👤 James B. Stamatoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:01
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/10; C08F20/34; C08F20/36; C09; C09K; C09K19/00; C09K19/04; C09K19/38; C09K19/3833; C09K19/3842; C09K19/3852; G; G02; G02F; G02F1/00; G02F1/35; G02F1/355; G02F1/361; G02F1/3615; G02F1/3617
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
73 words
A transparent thin film nonlinear optical medium comprising a thermotropic side chain liquid crystalline polymer characterized by a recurring monomeric unit corresponding to the formula: ##STR21## where m 1 is an integer of at least 5; n 1 is an integer between about 2-20; R 1 is hydrogen or a methyl group; X 1 is --NR 1 , --O-- or --S--; and Z 1 is --NO 2 , --CN or --CF 3 .
Claim 2
Dependent Claim
73 words
A transparent thin film nonlinear optical medium comprising a thermotropic side chain liquid crystalline polymer characterized by a recurring monomeric unit corresponding to the formula: ##STR21## where m 1 is an integer of at least 5; n 1 is an integer between about 2-20; R 1 is hydrogen or a methyl group; X 1 is --NR 1 , --O-- or --S--; and Z 1 is --NO 2 , --CN or --CF 3 .
Claim 3
Dependent Claim
33 words
A nonlinear optical medium in accordance with claim 1 wherein the medium is blended with a guest compound corresponding to the formula: ##STR22## where R 1 and Z 1 are as previously defined.
Claim 4
Dependent Claim
21 words
A nonlinear optical medium in accordance with claim 1 wherein the medium is noncentrosymmetric and exhibits second order nonlinear optical response.
Claim 5
Dependent Claim
21 words
A nonlinear optical medium in accordance with claim 1 wherein the medium is centrosymmetric and exhibits third order nonlinear optical response.
Claim 6
Dependent Claim
18 words
A nonlinear optical medium in accordance with claim 1 wherein the medium has an external field-induced molecular orientation.
Claim 7
Dependent Claim
22 words
A nonlinear optical medium in accordance with claim 1 wherein the medium contains a guest organic compound which exhibits nonlinear optical response.
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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) | 1993-06-11 | 1993-12-11 | 1994-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-11 | 1997-12-11 | 1998-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-06-11 | 2001-12-11 | 2002-06-12 | $7700.00 | Window Closed / Lapsed |