US4915491A
Expired / Lapsed
US
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Side chain liquid crystalline acrylic copolymers exhibiting nonlinear optical response
Assignee: CNA Holdings LLC
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Filing: 1986-10-03
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Granted: 1990-04-10
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Expires: 2006-10-03
Abstract
Abstract This invention provides novel acrylic copolymers which exhibit nonlinear optical response, and which have utility as a transparent optical component in optical light switch and light modulator devices. An invention side chain liquid crystalline polyvinyl polymer is illustrated by poly([6-(4-nitrobiphenyloxy)hexyl methacrylate][ethyl acrylate]): ##STR1##
Inventors
- 👤 Ronald N. DeMartino
- 👤 Hyun-Nam Yoon
- 👤 James B. Stamatoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 04:47
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/35; G02F1/355; G02F1/361; G02F1/3615; G02F1/3617; C; C08; C08F; C08F8/00; C08F8/30; C08G; C08G65/00; C08G65/02; C08G65/04; C08G65/22; C08G77/00; C08G77/04; C08G77/38; C08G77/382; C09; C09K; C09K19/00; C09K19/04; C09K19/38; C09K19/3833; C09K19/3842; C09K19/3852; C09K19/3876; C09K19/388; C09K19/40; C09K19/406; C09K19/408; C09K2323/00; C09K2323/05; C09K2323/057
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
134 words
An optical light switch or light modulator device with a polymeric nonlinear optical component comprising a transparent solid medium of a copolymer which is characterized by recurring monomeric units corresponding to the formula: ##STR12## where m and m 1 are integers which total at least 10; R is hydrogen or a C 1 -C 4 alkyl, C 6 -C 10 aryl or halo substituent; S' is a flexible spacer group having a linear chain length of between about 1-25 atoms; X is --NR 1 --, --O-- or --S--; R 1 is hydrogen or a C 1 -C 4 alkyl group; R 2 is a C 1 -C 4 alkyl group; Y is ##STR13## and Z is a nitro group; and wherein the copolymer has a stable orientation of an external field-induced alignment of mesogens.
Claim 2
Dependent Claim
134 words
An optical light switch or light modulator device with a polymeric nonlinear optical component comprising a transparent solid medium of a copolymer which is characterized by recurring monomeric units corresponding to the formula: ##STR12## where m and m 1 are integers which total at least 10; R is hydrogen or a C 1 -C 4 alkyl, C 6 -C 10 aryl or halo substituent; S' is a flexible spacer group having a linear chain length of between about 1-25 atoms; X is --NR 1 --, --O-- or --S--; R 1 is hydrogen or a C 1 -C 4 alkyl group; R 2 is a C 1 -C 4 alkyl group; Y is ##STR13## and Z is a nitro group; and wherein the copolymer has a stable orientation of an external field-induced alignment of mesogens.
Claim 3
Dependent Claim
16 words
An optical device in accordance with claim 1 wherein the copolymer component is poly([6-(4-nitrostilbeneoxy)hexyl methacrylate][methyl methacrylate]).
Claim 4
Dependent Claim
16 words
An optical device in accordance with claim 1 wherein the copolymer component is poly([6-(4-nitrobiphenyloxy)hexyl methacrylate][ethyl methacrylate]).
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) | 1993-04-09 | 1993-10-09 | 1994-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-09 | 1997-10-09 | 1998-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-09 | 2001-10-09 | 2002-04-10 | $7700.00 | Window Closed / Lapsed |