US2775595A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chzohz
Assignee: —
•
Filing: —
•
Granted: 1956-12-25
•
Expires: 1973-12-25
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:53
CPC Classifications
C; C07; C07D; C07D471/00; C07D471/02; C07D471/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
11 words
A 9-SUBSTITUTED 1.10-DIAZA-ANTHRACENE HAVING, IN ONE TAUTOMERIC FORM, THE GENERAL FORMULA
Claim 2
Dependent Claim
11 words
A 9-SUBSTITUTED 1.10-DIAZA-ANTHRACENE HAVING, IN ONE TAUTOMERIC FORM, THE GENERAL FORMULA
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-25 | 1960-06-25 | 1960-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-25 | 1964-06-25 | 1964-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-25 | 1968-06-25 | 1968-12-25 | $7700.00 | Window Closed / Lapsed |