US2861072A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of piperazine derivatives
Assignee: Abbott Laboratories
•
Filing: 1952-07-19
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Granted: 1958-11-18
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Expires: 1972-07-19
Abstract
No abstract record available.
Inventors
- 👤 Arthur W Weston
- 👤 Jr Kenneth E Hamlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:26
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/02; C07D295/027; C07D295/03; C07C; C07C29/00; C07C29/36; C07C29/38; C07C29/40; C07D295/04; C07D295/06; C07D295/073; C07D295/08; C07D295/084; C07D295/088; C07D295/096; C07D295/12; C07D295/125; C07D295/13; C07D295/16; C07D295/20; C07D295/205; C07D295/215; C07D333/00; C07D333/02; C07D333/04; C07D333/06; C07D333/14; C07D333/20; C07C2601/00; C07C2601/12; C07C2601/14; C07C2601/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
10 words
THE PROCESS OF PREPARING A COMPOUND HAVING THE GENERAL FORMULA:
Claim 2
Dependent Claim
10 words
THE PROCESS OF PREPARING A COMPOUND HAVING 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) | 1961-11-17 | 1962-05-19 | 1962-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-17 | 1966-05-19 | 1966-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-17 | 1970-05-19 | 1970-11-18 | $7700.00 | Window Closed / Lapsed |