US3704241A
Expired / Lapsed
US
⏱️ 0.0 years remaining
4-pyrazole acetic acid compounds
Assignee: Takeda Pharmaceutical Co Ltd
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Filing: 1970-11-17
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Granted: 1972-11-28
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Expires: 1990-11-17
Abstract
Abstract 4-PYRAZOLE ACETIC ACID OR ESTERS THEREOF OF THE FORMULA: R1-NHNH2 (III)SP@ WHEREIN R1 HAS THE SAME MEANING AS ABOVE, AND, IF DESIRED, HYDROLYZING THE THUS OBTAINED COMPOUND. THE COMPOUNDS POSSESS ANTI-INFLAMMATORY AND ANALGESIC ACTION. WHEREIN R3 REPRESENTS ALKYL, WITH A HYDRAZINE OF THE FORMULA: (PHENYL-CO-CH(-CH2-COO-R3)-CO-)BENZENE WHEREIN R1 IS HYDROGEN, LOWER ALKYL, ARYL OR ARALKYL, THE AROMATIC RING OF THE SAID ARYL OR ARALKYL BEING SUBSTITUTED OR UNSUBSTITUTED, AND R2 IS HYDROGEN OR ALKYL ARE PREPARED BY REACTING A B,B-DIBENZOYLPROPIONATE OF THE FORMULA: 1-R1,3,5-DI(PHENYL),4-(R2-OOC-CH2-)PYRAZOE
Inventors
- 👤 Shunsaku Noguchi
- 👤 Shoji Kishimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:52
CPC Classifications
C; C07; C07D; C07D231/00; C07D231/02; C07D231/10; C07D231/12
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) | 1975-11-28 | 1976-05-29 | 1976-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-28 | 1980-05-29 | 1980-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-28 | 1984-05-29 | 1984-11-28 | $7700.00 | Window Closed / Lapsed |