Patent US2794804A successfully refreshed from Google Patents.
US2794804A
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Substituted piperazines and method of preparing the same
Assignee: Wyeth Holdings LLC
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Filing: 1955-03-24
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Granted: 1957-06-04
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Expires: 1975-03-24
Abstract
No abstract record available.
Inventors
- 👤 Kushner Samuel
- 👤 Frederick L Bach
- 👤 Herbert J Brabander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:55
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/16; C07D295/18; C07D295/182; C07D295/185; C07D241/00; C07D241/02; C07D241/04; C07D295/04; C07D295/12; C07D295/125; C07D295/13; C07D295/20; C07D295/205
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
10 words
A COMPOUND SELECTED FROM THE GROUP HAVING THE GENERAL FORMULA:
Claim 2
Dependent Claim
10 words
A COMPOUND SELECTED FROM THE GROUP HAVING THE GENERAL 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) | 1960-06-03 | 1960-12-03 | 1961-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-03 | 1964-12-03 | 1965-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-03 | 1968-12-03 | 1969-06-04 | $7700.00 | Window Closed / Lapsed |