US4877852A
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Thiophene derivative polymer and a polymer composition thereof
Assignee: National Institute of Advanced Industrial Science and Technology
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Filing: 1988-02-12
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Granted: 1989-10-31
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Expires: 2008-02-12
Abstract
Abstract A thiophene derivative polymer comprising repeating units of the formula: ##STR1## (wherein R stands for one member selected from the group consisting of ##STR2## and a polymer composition having the polymer doped with an anion and consequently possessing a semiconducting characteristic.
Inventors
- 👤 Susumu Tanaka
- 👤 Masaaki Sato
- 👤 Kyoji Kaeriyama
- 👤 Yoshio Suda
- 👤 Takao Hiraide
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:12
CPC Classifications
C; C08; C08G; C08G61/00; C08G61/12; C08G61/122; C08G61/123; H; H01; H01B; H01B1/00; H01B1/06; H01B1/12; H01B1/124; H01B1/127; H01B1/128
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
36 words
A thiophene derivative polymer comprising repeating units of the formula: ##STR15## wherein n denotes a number within the range of about 10 to 500 and R represents a member selected from the group consisting of: ##STR16##
Claim 2
Dependent Claim
36 words
A thiophene derivative polymer comprising repeating units of the formula: ##STR15## wherein n denotes a number within the range of about 10 to 500 and R represents a member selected from the group consisting of: ##STR16##
Claim 3
Dependent Claim
12 words
The thiophene derivative polymer according to claim 1, wherein R is ##STR17##
Claim 4
Dependent Claim
12 words
The thiophene derivative polymer according to claim 1, wherein R is ##STR18##
Claim 5
Dependent Claim
12 words
The thiophene derivative polymer according to claim 1, wherein R is ##STR19##
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-10-30 | 1993-05-01 | 1993-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-30 | 1997-05-01 | 1997-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-30 | 2001-05-01 | 2001-10-31 | $7700.00 | Window Closed / Lapsed |