US2724716A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1-amino-2-trifluoromethyl-4-phenyl-aminoanthraquinone compounds
Assignee: Eastman Kodak Co
•
Filing: 1951-09-05
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Granted: 1955-11-22
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Expires: 1971-09-05
Abstract
No abstract record available.
Inventors
- 👤 Joseph B Dickey
- 👤 Edmund B Towne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:17
CPC Classifications
C; C09; C09B; C09B1/00; C09B1/16; C09B1/20; C09B1/26; C09B1/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
THE ANTHRAQUINONE COMPOUNDS HAVING THE GENERAL FORMULA:
Claim 2
Dependent Claim
7 words
THE ANTHRAQUINONE COMPOUNDS HAVING THE GENERAL FORMULA:
References Cited (Backward Citations)
US2459149A
Cited
US2466008A
Cited
US2466009A
Cited
US2451478A
Cited
US2487045A
Cited
US2510088A
Cited
US2539406A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-11-21 | 1959-05-23 | 1959-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-21 | 1963-05-23 | 1963-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-21 | 1967-05-23 | 1967-11-22 | $7700.00 | Window Closed / Lapsed |