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Patent US5037935A successfully refreshed from Google Patents.
US5037935A
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Thermoplastic compositions with nonlinear optical activity
Assignee: Dow Chemical Co
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Filing: 1990-06-08
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Granted: 1991-08-06
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Expires: 2010-06-08
Abstract
Abstract This invention provides thermoplastic polymeric materials comprising polycarbonate and polyestercarbonate resins and oriented polymeric compositions thereof which exhibit nonlinear optical properties.
Inventors
- 👤 Robert J. Gulotty
- 👤 Stephen E. Bales
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:30
CPC Classifications
C; C08; C08G; C08G64/00; C08G64/04; C08G64/06; C08G64/08; C08G63/00; C08G63/64; C08G64/12
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
38 words
A polymeric composition comprising polymers containing recurring units corresponding to the formula: R--O--X--O wherein R is derived from a mixture of bisphenol A and 3,3'-dinitrobisphenol A and X is a mixture of ##STR7## or a mixture of ##STR8##
Claim 2
Dependent Claim
38 words
A polymeric composition comprising polymers containing recurring units corresponding to the formula: R--O--X--O wherein R is derived from a mixture of bisphenol A and 3,3'-dinitrobisphenol A and X is a mixture of ##STR7## or a mixture of ##STR8##
Claim 3
Dependent Claim
50 words
A polymeric composition comprising polymers containing recurring units corresponding to the formula: R--O--X--O wherein R is derived from a mixture of 4,4'-thiodiphenol and 3,3'-dinitrobisphenol A, and X corresponds to the formula: ##STR9## or a mixture thereof, wherein R 1 is the divalent nucleus of an aliphatic or aromatic dicarboxylic acid.
Claim 4
Dependent Claim
50 words
A polymeric composition comprising polymers containing recurring units corresponding to the formula: R--O--X--O wherein R is derived from a mixture of 4,4'-thiodiphenol and 3,3'-dinitrobisphenol A, and X corresponds to the formula: ##STR9## or a mixture thereof, wherein R 1 is the divalent nucleus of an aliphatic or aromatic dicarboxylic acid.
References Cited (Backward Citations)
US4692636A
Cited
US4871830A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-08-05 | 1995-02-04 | 1995-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-08-05 | 1999-02-04 | 1999-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-08-05 | 2003-02-04 | 2003-08-06 | $7700.00 | Window Closed / Lapsed |