Patent US2821361A successfully refreshed from Google Patents.
Patent US3632587A successfully refreshed from Google Patents.
US3632587A
Expired / Lapsed
US
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Piperazino methyl isatinylidine 3 acetates
Assignee: John Wyeth and Brother Ltd
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Filing: 1968-08-01
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Granted: 1972-01-04
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Expires: 1988-08-01
Abstract
Abstract WHERE R3 IS HYDROGEN OR AN AMINOMETHYL RADICAL ARE EFFECTIVE HYPOTENSIVE AGENTS; ADDITIONALLY, MANY OF THESE ALSO POSSESS USEFUL ANTI-INFLAMMATORY ACTIVITY. -CH2-C$C-R3 WHEREIN R1 IS ETHYLENEDIOXY OR A DIVALENT RADICAL OF AN ALIPHATIC ESTER AND R2 IS AN AMINOALKYL OR ACYL RADICAL OR A RADICAL OF THE FORMULA 1-R2,2-(O=),3-(R1=)INDOLINE ISATIN DERIVATIVES HAVING THE FORMULA
Inventors
- 👤 John Hollowood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:50
CPC Classifications
C; C07; C07D; C07D209/00; C07D209/02; C07D209/04; C07D209/30; C07D209/32; C07D209/34; C07D209/38
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) | 1975-01-03 | 1975-07-05 | 1976-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-03 | 1979-07-05 | 1980-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-03 | 1983-07-05 | 1984-01-04 | $7700.00 | Window Closed / Lapsed |