US2741605A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phenoxazine compounds and their p-nitrosoaniline intermediates
Assignee: EIDP Inc
•
Filing: 1954-08-27
•
Granted: 1956-04-10
•
Expires: 1974-08-27
Abstract
No abstract record available.
Inventors
- 👤 Zwilgmeyer Frithjof
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:02
CPC Classifications
C; C09; C09B; C09B19/00; C07; C07D; C07D265/00; C07D265/28; C07D265/34; C07D265/38
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 3
Dependent Claim
6 words
A P-NITROSOANILINE COMPOUND OF THE FORMULA
Claim 4
Dependent Claim
6 words
A P-NITROSOANILINE COMPOUND OF THE FORMULA
References Cited (Backward Citations)
US1766403A
Cited
US1879541A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-04-10 | 1959-10-10 | 1960-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-10 | 1963-10-10 | 1964-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-10 | 1967-10-10 | 1968-04-10 | $7700.00 | Window Closed / Lapsed |