Patent US2494031A successfully refreshed from Google Patents.
US2494031A
Expired / Lapsed
US
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Dimethine merocyanine dyes
Assignee: Eastman Kodak Co
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Filing: 1945-06-23
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Granted: 1950-01-10
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Expires: 1965-06-23
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
2026-11-02 17:35
CPC Classifications
C; C09; C09B; C09B23/00; C09B23/16; C09B23/162; C09B23/164; C09B23/10; C09B23/105
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
9 words
THE DIMETHINE MEROCYANINE DYES OF THE FOLLOWING GENERAL FORMULA:
Claim 2
Dependent Claim
9 words
THE DIMETHINE MEROCYANINE DYES OF THE FOLLOWING GENERAL FORMULA:
References Cited (Backward Citations)
US2083804A
Cited
US2170803A
Cited
US2156464A
Cited
GB466097A
Cited
US2170804A
Cited
US2265908A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-09 | 1953-07-11 | 1954-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-09 | 1957-07-11 | 1958-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-09 | 1961-07-11 | 1962-01-10 | $7700.00 | Window Closed / Lapsed |