US3497514A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1(2-tertiary aminoethyl)-2-methyl-3-aryl-4-oxo-1,2,3,4-tetrahydroquinazoline derivatives and the preparation thereof
Assignee: Tanabe Pharma Corp
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Filing: 1967-11-15
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Granted: 1970-02-24
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Expires: 1987-11-15
Abstract
No abstract record available.
Inventors
- 👤 Kentaro Okumura
- 👤 Toyonari Oine
- 👤 Yoshihisa Yamada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:56
CPC Classifications
C; C07; C07D; C07D239/00; C07D239/70; C07D239/72; C07D239/86; C07D239/88; C07D239/91; A; A61; A61K; A61K31/00; A61K31/33; A61K31/395; A61K31/495; A61K31/505
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3213094A
Cited
US3215697A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-23 | 1973-08-25 | 1974-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-23 | 1977-08-25 | 1978-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-23 | 1981-08-25 | 1982-02-24 | $7700.00 | Window Closed / Lapsed |