Patent US3845065A successfully refreshed from Google Patents.
US3845065A
Expired / Lapsed
US
⏱️ 0.0 years remaining
4-oxo-4,5-dihydrothieno(3,2-c)pyridines
Assignee: Merck and Co Inc
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Filing: 1972-02-18
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Granted: 1974-10-29
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Expires: 1992-02-18
Abstract
Abstract 1. A COMPOUND OF THE FORMULA 4-(O=),5-R3,6-R2-4,5-DIHYDROTHIENO(3,2-C)PYRIDINE WHEREIN R2 IS HYDROGEN, HALOGEN, CYANO OR DILOWERALKYLAMINO AND R3 IS HYDROGEN OR LOWERALKYL OR PHARMACEUTICALLY ACCEPTABLE SALTS THEREOF PROVIDED THAT R2 IS NOT HYDROGEN OR HALOGEN WHEN R3 IS HYDROGEN.
Inventors
- 👤 T Shen
- 👤 R Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:35
CPC Classifications
C; C07; C07D; C07D495/00; C07D495/02; C07D495/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
5 words
A COMPOUND OF THE FORMULA
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) | 1977-10-28 | 1978-04-29 | 1978-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-28 | 1982-04-29 | 1982-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-28 | 1986-04-29 | 1986-10-29 | $7700.00 | Window Closed / Lapsed |