Patent US2644754A successfully refreshed from Google Patents.
US2644754A
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Supersensitized photographic silver halide emulsions
Assignee: Gevaert Photo Producten NV
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Filing: 1947-08-04
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Granted: 1953-07-07
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Expires: 1967-08-04
Abstract
No abstract record available.
Inventors
- 👤 Jennen Jacob Joseph
- 👤 Vandenbroele Oscar Hendrik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:26
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/28; G03C1/29
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
PHOTOGRAPHIC SILVER HALIDE EMULSION HAVING INCORPORATED THEREIN A SUPERSENSITIZING DYESTUFF COMPOSITION COMPRISING AT LEAST ONE SENSITIZING DYESTUFF AND AT LEAST ONE POLYMETHINE DYESTUFF, SAID SENSITIZING DYESTUFF BEING SELECTED FROM THE GROUP CONSISTING OF 3,3'' - DIETHYL - 2,2'' - CYANINE IODINE AND 3,3'',9-TRIETHYL-6,7,6'',7''-DIBENZOXOCARBOCYANINE IODIDE, SAID POLYMETHINE DYESTUFF HAVING THE FOLLOWING GENERAL FORMULA:
Claim 2
Dependent Claim
52 words
PHOTOGRAPHIC SILVER HALIDE EMULSION HAVING INCORPORATED THEREIN A SUPERSENSITIZING DYESTUFF COMPOSITION COMPRISING AT LEAST ONE SENSITIZING DYESTUFF AND AT LEAST ONE POLYMETHINE DYESTUFF, SAID SENSITIZING DYESTUFF BEING SELECTED FROM THE GROUP CONSISTING OF 3,3'' - DIETHYL - 2,2'' - CYANINE IODINE AND 3,3'',9-TRIETHYL-6,7,6'',7''-DIBENZOXOCARBOCYANINE IODIDE, SAID POLYMETHINE DYESTUFF HAVING THE FOLLOWING 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) | 1956-07-06 | 1957-01-05 | 1957-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-06 | 1961-01-05 | 1961-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-06 | 1965-01-05 | 1965-07-07 | $7700.00 | Window Closed / Lapsed |