US3177078A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter and absorbing dyes for photographic emulsions
Assignee: Agfa Gevaert NV
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Filing: 1963-01-21
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Granted: 1965-04-06
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Expires: 1983-01-21
Abstract
No abstract record available.
Inventors
- 👤 Bockly Erich
- 👤 Loffler Beate
- 👤 Muller Reinhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:19
CPC Classifications
C; C09; C09B; C09B57/00; C09B57/10; C07; C07F; C07F15/00; C07F15/02; C07F15/025; G; G03; G03C; G03C1/00; G03C1/76; G03C1/825; G03C1/83; G03C1/833
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
162 words
A PHOTOGRAPHIC ELEMENT FOR SUBTRACTIVE COLOUR PHOTOGRAPHY COMPRISING A SUPPORT HAVING COATED THEREON A PLURALITY OF SILVER HALIDE EMULSION LAYERS, ONE OF WHICH IS SENSITIVE TO THE BLUE REGION OF THE SPECTRUM AND CONTAINS A COLOUR-FORMING COMPOUND CAPABLE OF COUPLING WITH THE OXIDATION PRODUCTS OF A COLOUR DEVELOPER TO PRODUCE A YELLOW IMAGE, ONE OF WHICH IS SENSITIVE TO THE GREEN REGION OF THE SPECTRUM AND CONTAINS A COLOUR-FORMING COMPOUND CAPABLE OF COUPLING WITH THE OXIDATION PRODUCTS OF A COLOUR DEVELOPER TO PRODUCE A MAGENTA IMAGE AND ONE OF WHICH IS SENSITIVE TO THE RED REGION OF THE SPECTRUM AND CONTAINS (1) A COLOUR-FORMING COMPOUND CAPABLE OF COUPLING WITH THE OXIDATION PRODUCTS OF A COLOUR DEVELOPER TO PRODUCE A CYAN IMAGE AND (2) FROM ABOUT 0.5 TO 10 GRAMS PER MOLE OF SILVER HALIDE OF A WATER SOLUBLE DYE HAVING ITS MAXIMUM ABSORPTION IN THE RED-LIGHT REGION OF THE SPECTRUM, SAID DYE BEING A REACTION PRODUCT OF FERRIC CHLORIDE WITH 1,2-DIAMINONAPHTHALENE-DISULPHONIC ACID.
References Cited (Backward Citations)
FR1163100A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-04-05 | 1968-10-05 | 1969-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-05 | 1972-10-05 | 1973-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-05 | 1976-10-05 | 1977-04-06 | $7700.00 | Window Closed / Lapsed |