US2836595A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piperazine derivatives and process for
Assignee: —
•
Filing: —
•
Granted: 1958-05-27
•
Expires: 1975-05-27
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:36
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/04; C07D295/12; C07D295/125; C07D295/13; C07D295/16; C07D295/20; C07D295/205
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
20 words
A MEMBER OF THE CLASS CONSISTING OF 4-PHENYL-1PIPERAZINEALKYL CARBAMATES AND ACID SALTS THEREOF HAVING IN FREE BASE FORM THE FORMULA
Claim 2
Dependent Claim
20 words
A MEMBER OF THE CLASS CONSISTING OF 4-PHENYL-1PIPERAZINEALKYL CARBAMATES AND ACID SALTS THEREOF HAVING IN FREE BASE FORM THE FORMULA
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) | 1961-05-26 | 1961-11-25 | 1962-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-26 | 1965-11-25 | 1966-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-26 | 1969-11-25 | 1970-05-27 | $7700.00 | Window Closed / Lapsed |