US4795664A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Side chain liquid crystalline condensation polymers exhibiting nonlinear optical response
Assignee: Corning Inc
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Filing: 1986-08-22
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Granted: 1989-01-03
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Expires: 2006-08-22
Abstract
Abstract This invention provides novel side chain liquid crystalline polymers with a polyester or polyamide main chain structure. An invention polymer exhibits nonlinear optical response, and has utility as a transparent nonlinear optical component in optical light switch and light modulator devices. A present invention side chain liquid crystalline polymer is illustrated by the following polyester structure with pendant mesogenic side chains: ##STR1##
Inventors
- 👤 Ronald N. DeMartino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:06
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/04; C09K19/40; C09K19/406; C09K19/408; C08; C08G; C08G65/00; C08G65/02; C08G65/04; C08G65/22; C08G77/00; C08G77/04; C08G77/38; C08G77/382; C09K19/38; C09K19/3833; C09K19/3842; C09K19/3852; C09K19/3876; C09K19/388; G; G02; G02F; G02F1/00; G02F1/35; G02F1/355; G02F1/361; G02F1/3615; G02F1/3617
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
121 words
An optical light switch or light modulator device with a polymeric nonlinear optical component comprising a transparent solid medium of a thermotropic liquid crystalline polymer which is characterized by a recurring monomeric unit corresponding to the formula: ##STR23## where P is a polyester or polyamide condensation polymer main chain unit, S is a flexible spacer group having a linear chain length of between about 0-20 atoms, M is a pendant mesogen which exhibits a second order nonlinear optical susceptibility β of at least about 5×10 -30 esu as measured at 1.91 μm excitation wavelength, and where the pendant mesogens comprise at least about 10 weight percent of the polymer, and the polymer has a glass transition temperature above about 40° C.
Claim 2
Dependent Claim
121 words
An optical light switch or light modulator device with a polymeric nonlinear optical component comprising a transparent solid medium of a thermotropic liquid crystalline polymer which is characterized by a recurring monomeric unit corresponding to the formula: ##STR23## where P is a polyester or polyamide condensation polymer main chain unit, S is a flexible spacer group having a linear chain length of between about 0-20 atoms, M is a pendant mesogen which exhibits a second order nonlinear optical susceptibility β of at least about 5×10 -30 esu as measured at 1.91 μm excitation wavelength, and where the pendant mesogens comprise at least about 10 weight percent of the polymer, and the polymer has a glass transition temperature above about 40° C.
Claim 3
Dependent Claim
20 words
An optical device in accordance with claim 1 wherein the main chain of the polymeric component is a polyester structure.
Claim 4
Dependent Claim
20 words
An optical device in accordance with claim 1 wherein the main chain of the polymeric component is a polyamide structure.
Claim 5
Dependent Claim
22 words
An optical device in accordance with claim 1 wherein the pendant mesogens of the polymeric component have an external field-induced molecular alignment.
Claim 6
Dependent Claim
15 words
An optical device in accordance with claim 1 wherein the polymeric component is poly(ethylene 6-[(4-nitrostilbeneoxy)hexyloxy]terephthalamide.
Claim 7
Dependent Claim
14 words
An optical device in accordance with claim 1 wherein the polymeric component is poly[(4-nitrostilbeneoxyhexyloxymethyl)ethyleneterephthalate].
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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) | 1992-01-03 | 1992-07-04 | 1993-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-03 | 1996-07-04 | 1997-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-03 | 2000-07-04 | 2001-01-03 | $7700.00 | Window Closed / Lapsed |