US3146102A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic multicolor diffusion transfer process using dye developers
Assignee: Eastman Kodak Co
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Filing: 1960-08-22
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Granted: 1964-08-25
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Expires: 1980-08-22
Abstract
No abstract record available.
Inventors
- 👤 Walter J Weyerts
- 👤 Wilho M Salminen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:40
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/02; G03C8/08; G03C8/10; G03C8/12; G03C8/14; G03C8/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
IN THE PROCESSING OF AN EXPOSED PHOTOGRAPHIC ELEMENT COMPRISING A SUPPORT, A PLURALITY OF LIGHT-SENSITIVE SILVER HALIDE EMULSION LAYERS SENSITIVE TO LIGHT OF DIFFERENT REGIONS OF THE SPECTRUM, AND A DYE DEVELOPER WHICH IS BOTH A SILVER HALIDE DEVELOPING AGENT AND A DYE CONTIGUOUS TO THE SILVER HALIDE OF EACH OF SAID SILVER HALIDE EMULSION LAYERS, SAID PROCESSING BEING EFFECTED BY TREATING SAID PHOTOGRAPHIC ELEMENT WITH AN ALKALINE LIQUID, DEVELOPING LATENT IMAGES IN THE REGIONS OF EXPOSURE OF SAID SILVER HALIDE EMULSION LAYERS AND THERBY IMMOBILIZING DYE DEVELOPERS IN SAID REGIONS OF EXPOSURE, DYE DEVELOPERS IN UNDEVELOPED REGIONS DIFFUSING IMAGEWISE IN REGISTER TO A DYE DEVELOPER RECEPTION LAYER, THE IMPROVEMENT WHICH COMPRISES EFFECTING SAID PROCESSING IN THE PRESENCE OF A HETEROCYCLIC QUATERNARY AMMONIUM COMPOUND CAPABLE OF FORMING A DIFFUSIBLE METHYLENE BASE IN SAID ALKALINE LIQUID.
Claim 2
Dependent Claim
135 words
IN THE PROCESSING OF AN EXPOSED PHOTOGRAPHIC ELEMENT COMPRISING A SUPPORT, A PLURALITY OF LIGHT-SENSITIVE SILVER HALIDE EMULSION LAYERS SENSITIVE TO LIGHT OF DIFFERENT REGIONS OF THE SPECTRUM, AND A DYE DEVELOPER WHICH IS BOTH A SILVER HALIDE DEVELOPING AGENT AND A DYE CONTIGUOUS TO THE SILVER HALIDE OF EACH OF SAID SILVER HALIDE EMULSION LAYERS, SAID PROCESSING BEING EFFECTED BY TREATING SAID PHOTOGRAPHIC ELEMENT WITH AN ALKALINE LIQUID, DEVELOPING LATENT IMAGES IN THE REGIONS OF EXPOSURE OF SAID SILVER HALIDE EMULSION LAYERS AND THERBY IMMOBILIZING DYE DEVELOPERS IN SAID REGIONS OF EXPOSURE, DYE DEVELOPERS IN UNDEVELOPED REGIONS DIFFUSING IMAGEWISE IN REGISTER TO A DYE DEVELOPER RECEPTION LAYER, THE IMPROVEMENT WHICH COMPRISES EFFECTING SAID PROCESSING IN THE PRESENCE OF A HETEROCYCLIC QUATERNARY AMMONIUM COMPOUND CAPABLE OF FORMING A DIFFUSIBLE METHYLENE BASE IN SAID ALKALINE LIQUID.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-08-25 | 1968-02-24 | 1968-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-25 | 1972-02-24 | 1972-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-25 | 1976-02-24 | 1976-08-25 | $7700.00 | Window Closed / Lapsed |