Patent US2922788A successfully refreshed from Google Patents.
US2922788A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phenylpiperazine compounds and process for producing the same
Assignee: Parke Davis and Co LLC
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Filing: 1958-05-26
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Granted: 1960-01-26
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Expires: 1978-05-26
Abstract
No abstract record available.
Inventors
- 👤 Robert F Parcell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:02
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/04; C07D295/08; C07D295/084; C07D295/088
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
20 words
A COMPOUND OF THE CLASS CONSISTING OF N-PHENYLPIPERAZINES AND ACID ADDITION SALTS THEREOF HAVING IN FREE BASE FORM THE FORMULA
Claim 2
Dependent Claim
20 words
A COMPOUND OF THE CLASS CONSISTING OF N-PHENYLPIPERAZINES AND ACID ADDITION SALTS THEREOF HAVING IN FREE BASE FORM THE FORMULA
References Cited (Backward Citations)
US2836594A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-25 | 1963-07-27 | 1964-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-25 | 1967-07-27 | 1968-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-25 | 1971-07-27 | 1972-01-26 | $7700.00 | Window Closed / Lapsed |