US3635976A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1 - heterocyclic alkyl-1 2 3 4-tetrahydroquinazolinones and analgesic intermediates thereof
Assignee: Fisons Corp
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Filing: 1967-12-20
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Granted: 1972-01-18
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Expires: 1987-12-20
Abstract
Abstract 1-HETEROCYCLIC ALKY-,1,2,3,4-TETRAHYDROQUINAZOLINONES, ACID ADDITION SALTS THEREOF, AND INTERMEDIATE COMPOUNDS HAVING ANALGESIC PROPERTIES. A REPRESENTATIVE QUINAZOLINE COMPOUND IS 1-(2(1-PHENYL-4-PIPERAZINYL)ETHYL)-2-PHENYL-1,2,3,4-TETRAHYDRO-4 -QUINAZOLINONE. A REPRESENTATIVE ANALGESIC INTERMEDIATE IS 2(2-(4(1-PHENYL)PIPERAZINYL) ETHYLAMINO) BENZAMIDE.
Inventors
- 👤 Bola Vithal Shetty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:52
CPC Classifications
C; C07; C07D; C07D209/00; C07D209/02; C07D209/44; C07D209/48; C07D211/00; C07D211/04; C07D211/06; C07D211/36; C07D211/40; C07D211/44; C07D211/52; C07D223/00; C07D223/14; C07D223/16; C07D239/00; C07D239/70; C07D239/72; C07D239/86; C07D239/88; C07D239/90; C07D239/91; C07D295/00; C07D295/04; C07D295/12; C07D295/125; C07D295/13; C07D295/16; C07D295/18; C07D295/182; C07D295/192; C07D471/00; C07D471/02; C07D471/10
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-17 | 1975-07-19 | 1976-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-17 | 1979-07-19 | 1980-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-17 | 1983-07-19 | 1984-01-18 | $7700.00 | Window Closed / Lapsed |