US2965643A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Derivatives of pyrazolo
Assignee: —
•
Filing: —
•
Granted: 1960-12-20
•
Expires: 1977-12-20
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:14
CPC Classifications
C; C07; C07D; C07D487/00; C07D487/02; C07D487/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
15 words
A MEMBER SELECTED FROM THE GROUP CONSISTING OF PYRAZOLO (3 4-D) PYRIMIDINE OF THE FORMULA
References Cited (Backward Citations)
GB716327A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-20 | 1964-06-20 | 1964-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-20 | 1968-06-20 | 1968-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-20 | 1972-06-20 | 1972-12-20 | $7700.00 | Window Closed / Lapsed |