Patent US2556515A successfully refreshed from Google Patents.
US2556515A
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Methine dyes containing a 3-aryl-4-thiazolidone nucleus
Assignee: Eastman Kodak Co
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Filing: 1948-01-02
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Granted: 1951-06-12
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Expires: 1968-01-02
Abstract
No abstract record available.
Inventors
- 👤 Leslie G S Brooker
- 👤 Frank L White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:30
CPC Classifications
C; C09; C09B; C09B23/00; C09B23/0091; C09B23/0075; C09B23/0083; C09B23/02; C09B23/04; G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/10; G03C1/12; G03C1/14; G03C1/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
21 words
THE PROCESS FOR PREPARING A METHINE DYE WHICH COMPRISES CONDENSING A HALOGEN-ESTER SELECTED FROM THOSE REPRESENTED BY THE FOLLOWING GENERAL FORMULAS:
Claim 2
Dependent Claim
21 words
THE PROCESS FOR PREPARING A METHINE DYE WHICH COMPRISES CONDENSING A HALOGEN-ESTER SELECTED FROM THOSE REPRESENTED BY THE FOLLOWING GENERAL FORMULAS:
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) | 1954-06-11 | 1954-12-11 | 1955-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-11 | 1958-12-11 | 1959-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-11 | 1962-12-11 | 1963-06-12 | $7700.00 | Window Closed / Lapsed |