Patent US4393196A successfully refreshed from Google Patents.
US4393196A
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Polymers containing recurring units from dienoic acid
Assignee: Polaroid Corp
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Filing: 1981-03-02
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Granted: 1983-07-12
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Expires: 2001-03-02
Abstract
Abstract Disclosed is a class of polymers comprising recurring units of the formula ##STR1## where Mu is a divalent radical having the formula ##STR2## where each of D, D', E and E' is hydrogen, alkyl or substituted-alkyl; and Az is a divalent radical having the formula ##STR3## where each of R and R' is hydrogen, alkyl, aryl, alkaryl or aralkyl and W is a single bond, alkylene or alkenylene; or Az is a divalent radical having the formula ##STR4## where each of Y and Y' represent the atoms necessary to complete a piperazine or substituted-piperazine radical. Molecularly oriented polymers of the invention exhibit birefringence and can be utilized in filter, polarizing and other optical devices.
Inventors
- 👤 Howard G. Rogers
- 👤 Russell A. Gaudiana
- 👤 Jeannette S. Manello
- 👤 Ronald A. Sahatjian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:39
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/0622; C08G73/0633; C08G69/00; C08G69/02; C08G69/26
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
38 words
A film- or fiber-forming polymer comprising recurring units of the formula ##STR38## wherein each of D, D', E and E' is hydrogen, alkyl or substituted-alkyl and each of R and R' is hydrogen, alkyl, aryl, alkaryl or aralkyl.
Claim 2
Dependent Claim
38 words
A film- or fiber-forming polymer comprising recurring units of the formula ##STR38## wherein each of D, D', E and E' is hydrogen, alkyl or substituted-alkyl and each of R and R' is hydrogen, alkyl, aryl, alkaryl or aralkyl.
Claim 3
Dependent Claim
23 words
The polymer of claim 1 wherein each of D and E' is the same and each of D' and E is the same.
Claim 4
Dependent Claim
15 words
The polymer of claim 2 wherein each of D, D' E and E' is hydrogen.
Claim 5
Dependent Claim
21 words
The polymer of claim 2 wherein each of D and E' is alkyl and each of D' and E is hydrogen.
Claim 6
Dependent Claim
13 words
The polymer of claim 4 wherein each of D and E' is methyl.
Claim 7
Dependent Claim
14 words
The polymer of claim 1 wherein each of said R and R' is hydrogen.
Claim 8
Dependent Claim
28 words
The polymer of claim 1 wherein each of D and E' is methyl, each of D' and E is hydrogen and each of R and R' is hydrogen.
Claim 9
Dependent Claim
15 words
The polymer of claim 1 wherein each of D,D', E,E', R and R' is hydrogen.
Claim 10
Dependent Claim
46 words
A birefringent molecularly oriented polymer in the form of a film or fiber comprising recurring units of the formula ##STR39## wherein each of D, D', E and E' is hydrogen, alkyl or substituted-alkyl and each of R and R' is hydrogen, alkyl, aryl, alkaryl or aralkyl.
Claim 11
Dependent Claim
46 words
A birefringent molecularly oriented polymer in the form of a film or fiber comprising recurring units of the formula ##STR39## wherein each of D, D', E and E' is hydrogen, alkyl or substituted-alkyl and each of R and R' is hydrogen, alkyl, aryl, alkaryl or aralkyl.
Claim 12
Dependent Claim
19 words
The birefringent molecularly oriented polymeric film or fiber of claim 9 wherein each of R and R' is hydrogen.
Claim 13
Dependent Claim
27 words
The birefringent molecularly oriented polymeric film or fiber of claim 10 wherein each of D and E' is methyl and each of D and E is hydrogen.
Claim 14
Dependent Claim
21 words
The birefringent molecularly oriented polymeric film or fiber of claim 10 wherein each of D, D', E and E' is hydrogen.
Claim 15
Dependent Claim
18 words
The birefringent molecularly oriented polymer of claim 9 in the form of a unidirectionally stretched film or fiber.
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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) | 1986-07-11 | 1987-01-10 | 1987-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-11 | 1991-01-10 | 1991-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-11 | 1995-01-10 | 1995-07-12 | $7700.00 | Window Closed / Lapsed |