Patent US2478447A successfully refreshed from Google Patents.
Patent US3305553A successfully refreshed from Google Patents.
US3305553A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2-aminoquinazoline derivatives
Assignee: Parke Davis and Co LLC
•
Filing: 1965-10-18
•
Granted: 1967-02-21
•
Expires: 1985-10-18
Abstract
No abstract record available.
Inventors
- 👤 Milton L Hoefle
- 👤 Holmes Ann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:53
CPC Classifications
C; C07; C07D; C07D239/00; C07D239/70; C07D239/72; C07D239/78; C07D239/84
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
12 words
A MEMBER OF THE CLASS CONSISTING OF 2-AMINOQUINAZOLINE COMPOUNDS HAVING THE FORMULA
Claim 2
Dependent Claim
12 words
A MEMBER OF THE CLASS CONSISTING OF 2-AMINOQUINAZOLINE COMPOUNDS HAVING THE FORMULA
References Cited (Backward Citations)
US2945859A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-20 | 1970-08-22 | 1971-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-20 | 1974-08-22 | 1975-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-20 | 1978-08-22 | 1979-02-21 | $7700.00 | Window Closed / Lapsed |