US3712892A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quinazolinone derivatives
Assignee: Sumitomo Chemical Co Ltd
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Filing: 1970-07-29
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Granted: 1973-01-23
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Expires: 1990-07-29
Abstract
Abstract NOVEL QUINAZOLINE DERIVATIVES, WHICH ARE USEFUL AS MEDICINES, OF THE FORMULA, 1-(R4-CNH2N-),2-(W=),4-D,R1,R2-QUINAZOLINE WHEREIN D IS A GROUP OF THE FOMULA R3-PHENYL, OR PYRIDYL N IS 0 OR AN INTEGER OF 1 TO 3; R1, R2 AND R3 EACH IS HYDROGEN, HALOGEN, C1-4 ALKYL, C1-4 ALKOXY, NITRO, TRIFLUOROMETHYL, ETC.; R4 IS C3-6 CYCLOALKYL; AND W IS OXYGEN OR SULFUR. THESE QUINAZOLINE DERIVATIVES ARE PRODUCED BY ANY OF REACTIONS AS SHOWN IN THE FOLLOWING REACTION SCHEMA; WHEREIN D, N, R1, R2, R4 AND W ARE THE SAME AS DEFINED BELOW, AND R5 IS C1-4 ALKOXY-CARBONYL, CARBOXY, CARBAMYL OR CYANO. D R A W I N G
Inventors
- 👤 S Inaba
- 👤 K Mori
- 👤 H Yamamoto
- 👤 M Yamamoto
- 👤 K Ishizumi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:07
CPC Classifications
C; C07; C07D; C07D401/00; C07D401/02; C07D401/04; A; A61; A61K; A61K31/00; A61K31/33; A61K31/395; A61K31/495; A61K31/505; C07C; C07C255/00; C07D239/00; C07D239/70; C07D239/72; C07D239/78; C07D239/80; C07D239/82
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) | 1976-01-23 | 1976-07-24 | 1977-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-23 | 1980-07-24 | 1981-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-23 | 1984-07-24 | 1985-01-23 | $7700.00 | Window Closed / Lapsed |