US2937190A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbamylanthraquinone compounds and materials dyed therewith
Assignee: Eastman Kodak Co
•
Filing: 1958-03-10
•
Granted: 1960-05-17
•
Expires: 1978-03-10
Abstract
No abstract record available.
Inventors
- 👤 James M Straley
- 👤 Ralph R Giles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:28
CPC Classifications
C; C09; C09B; C09B1/00; C09B1/50; C09B1/54; C09B1/545; C09B1/16; C09B1/20; C09B1/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
THE ANTHRAQUINONE COMPOUNDS HAVING THE FORMULA:
Claim 2
Dependent Claim
6 words
THE ANTHRAQUINONE COMPOUNDS HAVING THE FORMULA:
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-17 | 1963-11-16 | 1964-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-17 | 1967-11-16 | 1968-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-17 | 1971-11-16 | 1972-05-17 | $7700.00 | Window Closed / Lapsed |