US2643255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing piperazine compounds and a new type of compound produced thereby
Assignee: UCB SA
•
Filing: 1949-10-19
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Granted: 1953-06-23
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Expires: 1969-10-19
Abstract
No abstract record available.
Inventors
- 👤 Morren Henri Gustave Pro Jacob
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:55
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/16; C07D295/20; C07D295/21; C07D279/00; C07D279/10; C07D279/14; C07D279/18; C07D279/22; C07D279/30; C07D295/215
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
21 words
A METHOD FOR PRODUCING A COMPOUND OF THE GROUP CONSISTING OF: 1-ALKYL-PIPERAZINE-4-CARBOXAMIDES AND THEIR ACID SALTS, SAID CARBOXAMIDES HAVING THE FORMULA:
Claim 2
Independent Claim
21 words
A METHOD FOR PRODUCING A COMPOUND OF THE GROUP CONSISTING OF: 1-ALKYL-PIPERAZINE-4-CARBOXAMIDES AND THEIR ACID SALTS, SAID CARBOXAMIDES HAVING THE FORMULA:
Claim 3
Dependent Claim
6 words
COMPOUNDS OF THE TYPE OF 1-ALKYL-1-HYDROHALIDE-PIPERAZINE-4-THIODIPHENYLCARBOXAMIDE.
Claim 4
Dependent Claim
6 words
COMPOUNDS OF THE TYPE OF 1-ALKYL-1-HYDROHALIDE-PIPERAZINE-4-THIODIPHENYLCARBOXAMIDE.
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) | 1956-06-22 | 1956-12-22 | 1957-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-22 | 1960-12-22 | 1961-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-22 | 1964-12-22 | 1965-06-23 | $7700.00 | Window Closed / Lapsed |