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Patent US2583551A successfully refreshed from Google Patents.
US2583551A
Expired / Lapsed
US
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Methine dyestuffs
Assignee: Eastman Kodak Co
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Filing: 1950-05-04
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Granted: 1952-01-29
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Expires: 1970-05-04
Abstract
No abstract record available.
Inventors
- 👤 Joseph B Dickey
- 👤 George J Taylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:25
CPC Classifications
C; C07; C07C; C07C255/00; C09; C09B; C09B23/00; C09B23/14; C09B23/143
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
8 words
THE METHINE DYE COMPOUNDS HAVING THE GENERAL FORMULA:
Claim 2
Dependent Claim
8 words
THE METHINE DYE COMPOUNDS HAVING THE GENERAL 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) | 1955-01-28 | 1955-07-30 | 1956-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-28 | 1959-07-30 | 1960-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-28 | 1963-07-30 | 1964-01-29 | $7700.00 | Window Closed / Lapsed |