Patent US2626259A successfully refreshed from Google Patents.
US2626259A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ffiii-ce
Assignee: —
•
Filing: —
•
Granted: 1953-01-20
•
Expires: 1970-01-20
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:41
CPC Classifications
C; C07; C07D; C07D241/00; C07D241/36; C07D241/38; C07D241/40; C07D241/42; C07D241/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
4 words
QUINOXALINE-DI-N-OXIDES OF THE FORMULA
Claim 2
Dependent Claim
4 words
QUINOXALINE-DI-N-OXIDES OF THE FORMULA
References Cited (Backward Citations)
US2416658A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-01-20 | 1956-07-21 | 1957-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-01-20 | 1960-07-21 | 1961-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-01-20 | 1964-07-21 | 1965-01-20 | $7700.00 | Window Closed / Lapsed |