Patent US2952680A successfully refreshed from Google Patents.
US2952680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Derivatives of x-quevazolone
Assignee: —
•
Filing: —
•
Granted: 1960-09-13
•
Expires: 1977-09-13
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:29
CPC Classifications
C; C07; C07D; C07D239/00; C07D239/70; C07D239/72; C07D239/86; C07D239/88; C07D239/91; C07D471/00; C07D471/02; C07D471/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
16 words
A 4-QUINAZOLONE SELECTED FROM THE GROUP CONSISTING OF COMPOUNDS HAVING ONE OF THE FOLLOWING GENERAL STRUCTURES
Claim 2
Dependent Claim
16 words
A 4-QUINAZOLONE SELECTED FROM THE GROUP CONSISTING OF COMPOUNDS HAVING ONE OF THE FOLLOWING GENERAL STRUCTURES
References Cited (Backward Citations)
US2439386A
Cited
CA535449A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-13 | 1964-03-14 | 1964-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-13 | 1968-03-14 | 1968-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-13 | 1972-03-14 | 1972-09-13 | $7700.00 | Window Closed / Lapsed |