Patent US3284453A successfully refreshed from Google Patents.
US3284453A
Expired / Lapsed
US
⏱️ 0.0 years remaining
4-(2-aroylethyl)-1-piperazinecarboxylic acid esters
Assignee: Wyeth Holdings LLC
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Filing: 1964-09-29
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Granted: 1966-11-08
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Expires: 1984-09-29
Abstract
No abstract record available.
Inventors
- 👤 Tomcufcik Andrew Stephen
- 👤 Craig Joyce Margaret
- 👤 Willson Stuart Dwight
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:11
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/16; C07D295/20; C07D295/205
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
A COMPOUND OF THE FORMULA: 1-(R1-CO-CH2-CH2-),4-(R2-OOC-)PIPERAZINE WHEREIN R, IS SELECTED FROM THE GROUP CONSISTING OF LOWER ALKYL PHENYL, HYDROXY PHENYL, LOWER ALKOXY PHENYL, HALOPHENYL, NITROPHENYL, AMINOPHENYL, LOWERALKYLANOYLAMINOPHENYL OR TRIFLUOROMETHYLPHENYL, NAPHTHYL, PHENANTHRYL, BIPHENYL, THIENYL, PYRRIDYL AND FURYL, R2 IS SELECTED FROM RTHE GROUP CONSISTING OF LOWER ALKYL AND PHENYL(LOWER)ALKYL.
Claim 2
Dependent Claim
48 words
A COMPOUND OF THE FORMULA: 1-(R1-CO-CH2-CH2-),4-(R2-OOC-)PIPERAZINE WHEREIN R, IS SELECTED FROM THE GROUP CONSISTING OF LOWER ALKYL PHENYL, HYDROXY PHENYL, LOWER ALKOXY PHENYL, HALOPHENYL, NITROPHENYL, AMINOPHENYL, LOWERALKYLANOYLAMINOPHENYL OR TRIFLUOROMETHYLPHENYL, NAPHTHYL, PHENANTHRYL, BIPHENYL, THIENYL, PYRRIDYL AND FURYL, R2 IS SELECTED FROM RTHE GROUP CONSISTING OF LOWER ALKYL AND PHENYL(LOWER)ALKYL.
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) | 1969-11-07 | 1970-05-09 | 1970-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-07 | 1974-05-09 | 1974-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-07 | 1978-05-09 | 1978-11-08 | $7700.00 | Window Closed / Lapsed |