US4769430A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polypyrrole thiophene
Assignee: Japan Science and Technology Agency
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Filing: 1987-01-16
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Granted: 1988-09-06
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Expires: 2007-01-16
Abstract
Abstract Disclosed are a five-membered heterocyclic compound polymer substantially constituted of repeat units represented by the following general formula: ##STR1## and a process for preparing the five-membered heterocyclic compound polymer described above by electrolytic oxidation of a monomer represented by the following formula in the presence of a supporting electrolyte and a solvent: ##STR2## The five-membered heterocyclic compound polymer of the present invention is high in electric conductivity and stable in the air. This polymer is, therefore, utilized for electronic materials, display materials and coating materials for electric conductive substances.
Inventors
- 👤 Shigeki Naitoh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:29
CPC Classifications
C; C08; C08G; C08G61/00; C08G61/12; C08G61/122; C08G61/123
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
71 words
A five-membered heterocyclic compound polymer substantially constituted of repeat units represented by the following general formula wherein a thiophene ring is directly bonded to a pyrrole ring at the 2- and 2'- positions, respectively: ##STR8## wherein each of R 2 , R 3 , R 4 , R 5 and R 7 is selected from the group consisting H, alkyl, halogen, hydroxyl, carboxyl or a salt thereof, aryl and aralkyl groups.
Claim 2
Dependent Claim
71 words
A five-membered heterocyclic compound polymer substantially constituted of repeat units represented by the following general formula wherein a thiophene ring is directly bonded to a pyrrole ring at the 2- and 2'- positions, respectively: ##STR8## wherein each of R 2 , R 3 , R 4 , R 5 and R 7 is selected from the group consisting H, alkyl, halogen, hydroxyl, carboxyl or a salt thereof, aryl and aralkyl groups.
Claim 3
Dependent Claim
28 words
A five-membered heterocyclic compound polymer as claimed in claim 1, wherein R 2 , R 3 , R 4 , R 5 and R 7 are hydrogen atoms.
References Cited (Backward Citations)
US4521589A
Cited
EP0178693A2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-09-06 | 1992-03-07 | 1992-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-06 | 1996-03-07 | 1996-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-06 | 2000-03-07 | 2000-09-06 | $7700.00 | Window Closed / Lapsed |