US4206308A
Expired / Lapsed
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Organic heat-sensitive semiconductive materials
Assignee: Panasonic Holdings Corp
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Filing: 1978-07-19
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Granted: 1980-06-03
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Expires: 1998-07-19
Abstract
Abstract Novel organic heat-sensitive semiconductive materials containing tetracyanoquinodimethane (TCNQ) as electron acceptor and exhibiting inherent resistivity-temperature characteristics. The materials include (N-n-propylthiazolium)+(TCNQ)-(TCNQ), (N-n-butylthiazolium)+(TCNQ)-(TCNQ) and(N-n-butyl pyridinium)+(TCNQ)-(TCNQ). These three compounds can be prepared by reacting TCNQ with iodides of corresponding cations, respectively. The heat-sensitive materials have particular utility in the field of timing or heat-sensitive elements.
Inventors
- 👤 Mutsuaki Murakami
- 👤 Susumu Yoshimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 01:35
CPC Classifications
C; C07; C07D; C07D277/00; C07D277/02; C07D277/20; C07D277/22; H; H01; H01B; H01B1/00; H01B1/06; H01B1/12; H01B1/121; H01C; H01C7/00; H01C7/02; H01C7/028; H01C7/04; H01C7/049
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
12 words
(N-n-butyl pyridinium) + (7,7,8,8-tetracyanoquinodimethane) - (7,7,8,8-tetracyanoquinodimethane) expressed by the following formula ##STR4##
Claim 2
Dependent Claim
12 words
(N-n-butyl pyridinium) + (7,7,8,8-tetracyanoquinodimethane) - (7,7,8,8-tetracyanoquinodimethane) expressed by the following formula ##STR4##
References Cited (Backward Citations)
US3941792A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-06-03 | 1983-12-03 | 1984-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-06-03 | 1987-12-03 | 1988-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-06-03 | 1991-12-03 | 1992-06-03 | $7700.00 | Window Closed / Lapsed |