Patent US3968526A successfully refreshed from Google Patents.
Patent US3726878A successfully refreshed from Google Patents.
US3726878A
Expired / Lapsed
US
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Pyridine thioacetamide derivatives
Assignee: Takeda Pharmaceutical Co Ltd
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Filing: 1970-07-07
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Granted: 1973-04-10
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Expires: 1990-07-07
Abstract
Abstract COMPOUND OF THE FORMULA 2-(R2-N(-R3)-C(=S)-CH2-),(R1)N-PYRIDINE WHEREIN R1 IS HYDROGEN, LOWER ALKYL, LOWER ALKOXY OR HALOGEN AND N IS AN INTEGER OF 1 TO 4, OR WHEREIN (R1)N IS A DIVALENT STRAIGHT CHAIN HYDROCARBON RADICAL HAVING 4 CARBON ATOMS WHICH IS ATTACHED TO THE 5TH AND 6TH POSITIONS OF THE PYRIDINE RING, EACH OF R2 AND R3 INDEPENDENTLY REPRESENTS HYDROGEN, LOWER ALKYL, ARALKYL OR ARYL, OR R2 AND R3 TOGETHER WITH THE NITROGEN ATOM TO WHICH THEY ARE ATTACHED FORM A HETEOCYCLIC RING WITH A PROVISO THAT AT LEAST ONE OF R1, R2 AND R3 IS OTHER THAN HYDROGEN AND A PHARMACEUTICALLY ACCEPATABLE SALT THEREOF WITH ACIDS.
Inventors
- 👤 Y Kanai
- 👤 H Honda
- 👤 A Nohara
- 👤 M Kanno
- 👤 K Hyogo
- 👤 Y Sanno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:38
CPC Classifications
C; C07; C07D; C07D215/00; C07D215/02; C07D215/12; C07D213/00; C07D213/02; C07D213/04; C07D213/24; C07D213/54; C07D213/59; C07D213/60; C07D213/62; C07D213/63; C07D213/68
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) | 1976-04-09 | 1976-10-09 | 1977-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-09 | 1980-10-09 | 1981-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-09 | 1984-10-09 | 1985-04-10 | $7700.00 | Window Closed / Lapsed |