US4818802A
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Hydrazide-containing thermoplastic polymers exhibiting nonlinear optical response
Assignee: Hoechst Celanese Chemical Co
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Filing: 1987-09-08
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Granted: 1989-04-04
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Expires: 2007-09-08
Abstract
Abstract In one embodiment this invention provides a nonlinear optical medium which is a transparent film of a thermoplastic polymer composed of recurring monomeric units corresponding to the formula: ##STR1##
Inventors
- 👤 Eui W. Choe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:55
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/35; G02F1/355; G02F1/361; G02F1/3615; G02F1/3617; C; C08; C08F; C08F20/00; C08F20/02; C08F20/52; C08F20/54; C08F20/60
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
40 words
A thermoplastic polymer which is characterized by a recurring monomeric unit corresponding to the formula: ##STR11## where R is a substituent selected from hydrogen and C 1 -C 4 alkyl groups; and m is an integer of at least 3.
Claim 2
Dependent Claim
40 words
A thermoplastic polymer which is characterized by a recurring monomeric unit corresponding to the formula: ##STR11## where R is a substituent selected from hydrogen and C 1 -C 4 alkyl groups; and m is an integer of at least 3.
Claim 3
Dependent Claim
12 words
A thermoplastic polymer in accordance with claim 1 wherein R is hydrogen.
Claim 4
Dependent Claim
12 words
A thermoplastic polymer in accordance with claim 1 wherein R is methyl.
Claim 5
Dependent Claim
20 words
A thermoplastic polymer in accordance with claim 1 wherein the polymer has a weight average molecular weight between about 500-500,000.
Claim 6
Dependent Claim
25 words
A thermoplastic polymer in accordance with claim 1 wherein the recurring monomeric units comprise at least about 20 weight percent of the total polymer weight.
Claim 7
Dependent Claim
20 words
A thermoplastic polymer in accordance with claim 1 wherein the polymer additionally is characterized by recurring polymerized ethylene monomeric units.
Claim 8
Dependent Claim
21 words
A thermoplastic polymer in accordance with claim 1 wherein the polymer additionally is characterized by recurring polymerized vinyl halide monomeric units.
Claim 9
Dependent Claim
20 words
A thermoplastic polymer in accordance with claim 1 wherein the polymer additionally is characterized by recurring polymerized arylethylene monomeric units.
Claim 10
Dependent Claim
24 words
A thermoplastic polymer in accordance with claim 1 wherein the polymer additionally is characterized by recurring polymerized acrylamide, methacrylamide, N,N-dialkylacrylamide or N,N-dialkylmethacrylamide monomeric units.
Claim 11
Dependent Claim
22 words
A thermoplastic polymer in accordance with claim 1 wherein the polymer additionally is characterized by recurring polymerized acrylonitrile or methacrylonitrile monomeric units.
Claim 12
Dependent Claim
15 words
A thermoplastic polymer which is characterized by recurring monomeric units corresponding to the formula: ##STR12##
Claim 13
Dependent Claim
15 words
A thermoplastic polymer which is characterized by recurring monomeric units corresponding to the formula: ##STR12##
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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) | 1992-04-03 | 1992-10-03 | 1993-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-03 | 1996-10-03 | 1997-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-03 | 2000-10-03 | 2001-04-04 | $7700.00 | Window Closed / Lapsed |