US4219656A
Expired / Lapsed
US
⏱️ 0.0 years remaining
3,4-Disubstituted thiophenes
Assignee: Wyeth Holdings LLC
•
Filing: 1978-10-24
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Granted: 1980-08-26
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Expires: 1998-10-24
Abstract
Abstract This application discloses novel substituted 4-(alkoxy or alkanoyloxy)-3-thiophenecarboxylic acids, esters, and amides which possess analgesic and antipyretic activity in warm-blooded animals.
Inventors
- 👤 Jeffery B. Press
- 👤 Sidney R. Safir
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:57
CPC Classifications
C; C07; C07D; C07D333/00; C07D333/02; C07D333/04; C07D333/26; C07D333/30; C07D333/36; C07D333/38
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
1 words
5-Chloro-4-ethoxy-3-thiophenecarboxamide.
Claim 2
Dependent Claim
1 words
5-Chloro-4-ethoxy-3-thiophenecarboxamide.
Claim 3
Dependent Claim
1 words
5-Chloro-4-ethoxy-3-thiophenecarboxanilide.
Claim 4
Dependent Claim
1 words
5-Chloro-4-ethoxy-3-thiophenecarboxanilide.
References Cited (Backward Citations)
DE2615885A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-08-26 | 1984-02-25 | 1984-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-08-26 | 1988-02-25 | 1988-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-08-26 | 1992-02-25 | 1992-08-26 | $7700.00 | Window Closed / Lapsed |