US3157655A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pyrazolopyrimidine derivative
Assignee: Shionogi and Co Ltd
•
Filing: 1962-08-10
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Granted: 1964-11-17
•
Expires: 1982-08-10
Abstract
No abstract record available.
Inventors
- 👤 Takamizawa Akira
- 👤 Hamashima Yoshio
- 👤 Sato Hisao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:42
CPC Classifications
C; C07; C07D; C07D487/00; C07D487/02; C07D487/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
2,3,6-TRIMETHYL-7- AMINOPYRAZOLO(1,5-A)PYRIMIDINE. 2. 2,3,6-TRIMETHYL-7- AMINOPYRAZOLO(1,5-A)PYRIMIDINE HYDROCHLORIDE.
Claim 2
Dependent Claim
6 words
2,3,6-TRIMETHYL-7- AMINOPYRAZOLO(1,5-A)PYRIMIDINE. 2. 2,3,6-TRIMETHYL-7- AMINOPYRAZOLO(1,5-A)PYRIMIDINE HYDROCHLORIDE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-11-17 | 1968-05-18 | 1968-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-17 | 1972-05-18 | 1972-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-17 | 1976-05-18 | 1976-11-17 | $7700.00 | Window Closed / Lapsed |