Patent US4876213A successfully refreshed from Google Patents.
US3794643A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quinazolinedione derivatives
Assignee: Hisamitsu Pharmaceutical Co Inc
•
Filing: 1971-04-20
•
Granted: 1974-02-26
•
Expires: 1991-04-20
Abstract
Abstract THE PRESENT INVENTION RELATES TO NOVEL QUINZAOLINEDIONE DERIVATIVES POSSESSING EXCELLENT ANTI-INFLAMMATORY ACTION AND ANALGESIC ACTION, AND PROCESS FOR THE PRODUCTION THEREOF BY REACTING THE COMPOUNDS HAVING THE FOLLOWING GENERAL FORMULA, 2,4-DI(O=),1-(R2,R3-PHENYL)-1,2,3,4-TETRAHYDROQUINAZOLINE WHEREN R2 AND/OR R3 REPRESENT HYDROGEN ATOM, CF3, ONE OR MORE OF HALOGEN ATOMS SELECTED FROM THE GROUP CONSISTING OF CL, BR AND F, METHYL-, METHOXY- OR ETHOXYRADICAL), WITH THE GENERAL FORMULA, R1X OR R2SO4 (WHEREIN R1 REPRESENTS ALKYL RADICAL, SUBSTITUTED ALKYL RADICAL OR ACYL RADICAL, X REPRESENTS HALOGEN ATOM, AND R REPRESENTS LOWER ALKYL RADICAL).
Inventors
- 👤 A Nakagawa
- 👤 R Kimura
- 👤 T Yabuuchi
- 👤 H Fujimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:56
CPC Classifications
C; C07; C07D; C07D239/00; C07D239/70; C07D239/72; C07D239/95; C07D239/96
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1977-02-25 | 1977-08-27 | 1978-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-25 | 1981-08-27 | 1982-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-25 | 1985-08-27 | 1986-02-26 | $7700.00 | Window Closed / Lapsed |