US4826950A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Condensation polymers exhibiting nonlinear optical response
Assignee: Hoechst Celanese Chemical Co
•
Filing: 1988-02-16
•
Granted: 1989-05-02
•
Expires: 2008-02-16
Abstract
Abstract This invention provides novel isotropic condensation polymers which exhibit nonlinear optical response, and which have utility as a transparent optical component in optical light switch an light modulator devices. An invention isotropic polyester is illustrated by the following structure: ##STR1##
Inventors
- 👤 Ronald N. DeMartino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:24
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/35; G02F1/355; G02F1/361; G02F1/3615; G02F1/3617; C; C08; C08G; C08G63/00; C08G63/68; C08G63/685; C08G63/6854; C08G63/6856
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
59 words
An isotropic condensation polymer which is characterized by recurring monomeric units corresponding to the formula: ##STR10## where m is an integer of at least 3; n is an integer between about 1-20; R is a covalent bond, or a divalent aliphatic, alicyclic or aromatic substituent containing between about 1-12 carbon atoms; and Z is a nitro or cyano substituent.
Claim 2
Dependent Claim
59 words
An isotropic condensation polymer which is characterized by recurring monomeric units corresponding to the formula: ##STR10## where m is an integer of at least 3; n is an integer between about 1-20; R is a covalent bond, or a divalent aliphatic, alicyclic or aromatic substituent containing between about 1-12 carbon atoms; and Z is a nitro or cyano substituent.
Claim 3
Dependent Claim
21 words
A condensation polymer 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
A condensation polymer in accordance with claim 1 which has a glass transition temperature in the range between about 40°-180° C.
Claim 5
Dependent Claim
14 words
A transparent nonlinear optical medium comprising a condensation polymer in accordance with claim 1.
Claim 6
Dependent Claim
24 words
A transparent nonlinear optical medium in accordance with claim 4 which is characterized by an external field-induced orientation of aligned pendant biphenyl side chains.
Claim 7
Dependent Claim
46 words
An isotropic polyester which is characterized by recurring monomeric units corresponding to the formula: ##STR11## where m 1 is an integer between about 5-300; n 1 is an integer between about 2-6; and R 1 is a divalent C 1 -C 4 alkylene or phenylene substituent.
Claim 8
Dependent Claim
46 words
An isotropic polyester which is characterized by recurring monomeric units corresponding to the formula: ##STR11## where m 1 is an integer between about 5-300; n 1 is an integer between about 2-6; and R 1 is a divalent C 1 -C 4 alkylene or phenylene substituent.
Claim 9
Dependent Claim
17 words
A polyester in accordance with claim 6 wherein n 1 is 2, and R 1 is para-phenylene.
Claim 10
Dependent Claim
13 words
A transparent nonlinear optical medium comprising a polyester in accordance with claim 6.
Claim 11
Dependent Claim
24 words
A transparent nonlinear optical medium in accordance with claim 8 which is characterized by an external field-induced orientation of aligned pendant biphenyl side chains.
Claim 12
Dependent Claim
46 words
An isotropic polyester which is characterized by recurring monomeric units corresponding to the formula: ##STR12## where m 1 is an integer between about 5-300; n 1 is an integer between about 2-6; and R 1 is a divalent C 1 -C 4 alkylene or phenylene substituent.
Claim 13
Dependent Claim
46 words
An isotropic polyester which is characterized by recurring monomeric units corresponding to the formula: ##STR12## where m 1 is an integer between about 5-300; n 1 is an integer between about 2-6; and R 1 is a divalent C 1 -C 4 alkylene or phenylene substituent.
Claim 14
Dependent Claim
17 words
A polyester in accordance with claim 10 wherein n 1 is 2, and R 1 is para-phenylene.
Claim 15
Dependent Claim
13 words
A transparent nonlinear optical medium comprising a polyester in accordance with claim 10.
Claim 16
Dependent Claim
24 words
A transparent nonlinear optical medium in accordance with claim 12 which is characterized by an external field-induced orientation of aligned pendant biphenyl side chains.
References Cited (Backward Citations)
US4762912A
Cited
US4757130A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-05-01 | 1992-10-31 | 1993-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-01 | 1996-10-31 | 1997-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-01 | 2000-10-31 | 2001-05-02 | $7700.00 | Window Closed / Lapsed |