US4855376A
Expired / Lapsed
US
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Side chain liquid crystalline polymers exhibiting nonlinear optical properties
Assignee: CNA Holdings LLC
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Filing: 1986-11-21
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Granted: 1989-08-08
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Expires: 2006-11-21
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 modulator devices. An invention sidechain liquid crystalline polymer is illustrated by poly[4-(8-hydroxyoctyloxybenzylideneamino)-4'-nitrostilbene methacrylate]: ##STR1##
Inventors
- 👤 Ronald N. De Martino
- 👤 Hyun-Nam Yoon
- 👤 James B. Stamatoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:15
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/38; C09K19/3833; C09K19/3842; C09K19/3852; C08; C08F; C08F20/00; C08F20/02; C08F20/10; C08F20/34; C08F20/36; G; G02; G02F; G02F1/00; G02F1/35; G02F1/355; G02F1/361; G02F1/3615; G02F1/3617
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
52 words
A side chain liquid crystalline polymer characterized by a recurring monomeric unit corresponding to the formula: ##STR21## where m is an integer of at least 3; n is an integer between 1-25; R is hydrogen or a C 1 -C 4 alkyl substituent; and R 1 is hydrogen or a methyl group.
Claim 2
Dependent Claim
52 words
A side chain liquid crystalline polymer characterized by a recurring monomeric unit corresponding to the formula: ##STR21## where m is an integer of at least 3; n is an integer between 1-25; R is hydrogen or a C 1 -C 4 alkyl substituent; and R 1 is hydrogen or a methyl group.
Claim 3
Dependent Claim
24 words
A liquid crystalline polymer in accordance with claim 1 wherein the recurring monomeric unit comprises at least about 60 weight percent of the polymer.
Claim 4
Dependent Claim
35 words
A liquid crystalline polymer in accordance with claim 1 wherein the mesogenic sidechains exhibit a second order nonlinear optical susceptibility β of at least about 1×10 -30 esu as measured at 1.91 μm excitation wavelength.
Claim 5
Dependent Claim
21 words
A liquid crystalline polymer in accordance with claim 1 wherein the polymer has a weight average molecular weight between about 1000-500,000.
Claim 6
Dependent Claim
17 words
A liquid crystalline polymer in accordance with claim 1 wherein the polymer exhibits a thermotropic smectic mesophase.
Claim 7
Dependent Claim
56 words
A thermotropic side chain liquid crystalline polymer characterized by a recurring monomeric unit corresponding to the formula: ##STR22## where m 1 is an integer of at least 5; n 1 is an integer between 2-20; R 1 is hydrogen or a methyl group; X 1 is --NR 1 --; and Z 1 is --NO 2 .
Claim 8
Dependent Claim
56 words
A thermotropic side chain liquid crystalline polymer characterized by a recurring monomeric unit corresponding to the formula: ##STR22## where m 1 is an integer of at least 5; n 1 is an integer between 2-20; R 1 is hydrogen or a methyl group; X 1 is --NR 1 --; and Z 1 is --NO 2 .
Claim 9
Dependent Claim
36 words
An acrylic ester composition corresponding to the formula: ##STR23## where n is an integer between 1-25; R is hydrogen or a C 1 -C 4 alkyl substituent; and R 1 is hydrogen or a methyl group.
Claim 10
Dependent Claim
36 words
An acrylic ester composition corresponding to the formula: ##STR23## where n is an integer between 1-25; R is hydrogen or a C 1 -C 4 alkyl substituent; and R 1 is hydrogen or a methyl group.
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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) | 1992-08-07 | 1993-02-06 | 1993-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-08-07 | 1997-02-06 | 1997-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-08-07 | 2001-02-06 | 2001-08-08 | $7700.00 | Window Closed / Lapsed |