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US2968661A
Expired / Lapsed
US
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1-amino-2-bromo-4-arylaminoanthraquinone compounds
Assignee: Eastman Kodak Co
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Filing: 1958-08-28
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Granted: 1961-01-17
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Expires: 1978-08-28
Abstract
No abstract record available.
Inventors
- 👤 James M Straley
- 👤 Ralph R Giles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:57
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)
DE855541C
Cited
US2716655A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-01-17 | 1964-07-18 | 1965-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-17 | 1968-07-18 | 1969-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-17 | 1972-07-18 | 1973-01-17 | $7700.00 | Window Closed / Lapsed |