Patent US2843580A successfully refreshed from Google Patents.
US2843580A
Expired / Lapsed
US
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Metallized azo dyes prepared by coupling amino-phenols to diphenylamines
Assignee: Eastman Kodak Co
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Filing: 1956-04-04
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Granted: 1958-07-15
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Expires: 1976-04-04
Abstract
No abstract record available.
Inventors
- 👤 James M Straley
- 👤 David J Wallace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:53
CPC Classifications
C; C09; C09B; C09B29/00; C09B29/06; C09B29/08; C09B45/00; C09B45/02; C09B45/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
39 words
AS A COMPOSITION OF MATTER, A COMPLEX METAL COMPOUND WHICH CONTAINS A METAL SELECTED FROM THE GROUP CONSISTING OF CHROMIUM, COBALT, COPPER, IRON, MANGANESE, NICKEL AND VANADIUM IN COMPLEX COMBINATION WITH A MONOAZO COMPOUND HAVING THE FOLLOWING STRUCTURAL FORMULA:
Claim 2
Dependent Claim
39 words
AS A COMPOSITION OF MATTER, A COMPLEX METAL COMPOUND WHICH CONTAINS A METAL SELECTED FROM THE GROUP CONSISTING OF CHROMIUM, COBALT, COPPER, IRON, MANGANESE, NICKEL AND VANADIUM IN COMPLEX COMBINATION WITH A MONOAZO COMPOUND HAVING THE FOLLOWING STRUCTURAL FORMULA:
References Cited (Backward Citations)
US2069743A
Cited
US2077322A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-14 | 1962-01-13 | 1962-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-14 | 1966-01-13 | 1966-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-14 | 1970-01-13 | 1970-07-15 | $7700.00 | Window Closed / Lapsed |