Patent US3824243A successfully refreshed from Google Patents.
US3824243A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mono-o-phthalyl piperazine and mono-piperazine mono-phthalate di-salts
Assignee: Individual
•
Filing: 1972-11-24
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Granted: 1974-07-16
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Expires: 1992-11-24
Abstract
Abstract MONO-O-PHTHALYL PIPERAZINE, 2-((4-PIPERAZINYL)-CO-)-BENZOIC ACID AND SALTS THEREOF WITH PHYSIOLOGICALLY ACCEPTABLE ACIDS, USEFUL AS ANTHELMINITICS; A METHOD FOR MAKING MONOPHTHALYL PIPERAZINE BY REACTING PHTHALIC ANHYDRIDR AND PIPERAZINES BETWEEN 0* C. AND 50* C., MONO-PIPERAZINE DISALTS OF O-, M-, AND P-PHTHALIC ACIDS, USEFUL AS ANTHELMINTICS; A METHOD FOR MAKING SAID DI-SALTS, USEFUL BY REACTING A PHTHALIC ACID WITH PIPERAZINE BETWEEN 0* C. AND 50* C.
Inventors
- 👤 E Henderson
- 👤 K Henderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:54
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/16; C07D295/18
Claims Analysis
Total Claims: 0
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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) | 1977-07-15 | 1978-01-14 | 1978-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-15 | 1982-01-14 | 1982-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-15 | 1986-01-14 | 1986-07-16 | $7700.00 | Window Closed / Lapsed |