US2945860A
Expired / Lapsed
US
⏱️ 0.0 years remaining
New piperazine-carboxylic acid esters
Assignee: —
•
Filing: —
•
Granted: 1960-07-19
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Expires: 1977-07-19
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:43
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/16; C07D295/20; C07D295/205; C12; C12N; C12N5/00; C12N5/06; C12N5/0602; C12N5/0634; C12N5/0647
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
7 words
PIPERAZINE-CARBOXYLIC ACID ESTERS OF THE GENERAL FORMULA
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) | 1963-07-19 | 1964-01-18 | 1964-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-19 | 1968-01-18 | 1968-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-19 | 1972-01-18 | 1972-07-19 | $7700.00 | Window Closed / Lapsed |