US2510088A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1, 4-diaminoanthraquinone compounds containing a cyano group in the 2-position
Assignee: Eastman Kodak Co
•
Filing: 1947-11-01
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Granted: 1950-06-06
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Expires: 1967-11-01
Abstract
No abstract record available.
Inventors
- 👤 Joseph B Dickey
- 👤 Loria Anthony
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:45
CPC Classifications
C; C09; C09B; C09B1/00; C09B1/16; C09B1/20; C09B1/26; C09B1/32
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)
US2326047A
Cited
GB306963A
Cited
US1938029A
Cited
US2357176A
Cited
US2353108A
Cited
US2359381A
Cited
US2391011A
Cited
US2455077A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-06-05 | 1953-12-05 | 1954-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-06-05 | 1957-12-05 | 1958-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-06-05 | 1961-12-05 | 1962-06-06 | $7700.00 | Window Closed / Lapsed |