Patent US3823151A successfully refreshed from Google Patents.
US3823151A
Expired / Lapsed
US
⏱️ 0.0 years remaining
4,5,6,7-tetrahydrothieno(2,3-d)pyridines
Assignee: Novartis AG
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Filing: 1971-09-28
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Granted: 1974-07-09
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Expires: 1991-09-28
Abstract
Abstract COMPOUNDS OF THE FORMULA 2-(R0-NH-),3-R1,6-RZ,4,5,6,7-TETRAHYDROTHIENO(2,3-D)PYRI DINE IN WHICH R0 STANDS FOR AN ACYL GROUP OR HYDROGEN, R1 FOR A A FREE OR FUNCTIONALLY CONVERTED CARBOXYL GROUP, AND RZ FOR AN OPTIONALLY SUBSTITUTED HYDROCARBON RADICAL OR HYDROGEN AND WHICH MAY BE SUBSTITUTED IN POSITIONS 4, 5 AND/OR 7, ARE USEFUL AS ANTIPHLOGISTICS AND AS STARTING MATERIALS.
Inventors
- 👤 K Eichenberger
- 👤 P Schmidt
- 👤 E Schweizer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:24
CPC Classifications
C; C07; C07D; C07D495/00; C07D495/02; C07D495/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-08 | 1978-01-07 | 1978-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-08 | 1982-01-07 | 1982-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-08 | 1986-01-07 | 1986-07-09 | $7700.00 | Window Closed / Lapsed |