US2907765A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piperazine derivatives
Assignee: —
•
Filing: —
•
Granted: 1959-10-06
•
Expires: 1976-10-06
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:49
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/04; C07D295/08; C07D295/084; C07D295/092; C07D471/00; C07D471/02; C07D471/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
14 words
A CHEMICAL COMPOUND SELECTED FROM THE GROUP CONSISTING OF THE BASE HAVING THE FORMULA:
Claim 2
Dependent Claim
14 words
A CHEMICAL COMPOUND SELECTED FROM THE GROUP CONSISTING OF THE BASE HAVING THE FORMULA:
References Cited (Backward Citations)
US2680115A
Cited
US2716121A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-05 | 1963-04-06 | 1963-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-05 | 1967-04-06 | 1967-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-05 | 1971-04-06 | 1971-10-06 | $7700.00 | Window Closed / Lapsed |