US3232759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diffusion transfer process employing tone modifiers
Assignee: Eastman Kodak Co
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Filing: 1962-09-13
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Granted: 1966-02-01
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Expires: 1982-09-13
Abstract
No abstract record available.
Inventors
- 👤 Richard L White
- 👤 Edwin B Wyand
- 👤 Hugh G Mcguckin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:46
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/24; G03C8/243
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
A PROCESS FOR PREPARING A PHOTOGRAPHIC IMAGE WHICH COMPRISES DEVELOPING AN EXPOSED PHOTOGRAPHIC SILVER HALIDE EMULSION LAYER WITH A SILVER HALIDE DEVELOPING AGENT AND TRANSFERRING THE SILVER HALIDE BY DIFFUSION FROM THE UNDEVELOPED AREAS OF THE EMULSION LAYER TO A SUPPORTED IMAGE RECEIVING LAYER CONTAININ DEELOPING NUCLEI, TRANSFER BEING EFFECTED IN CONTIGUITY WITH SUFFICIENT SILVER HALIDE SOLVENT TO REMOVE SUBSTANTIALLY ALL UNDEVELOPED SILVER HALIDE FROM THE EMULSION LAYER, AN ALKANOLAMINE AND IN ADDITION, A TONING COMPOUND, SAID COMPOUND BEING DIFFERENT FROM THE SILVER HALIDE SOLVENT, HAVING THE GENERAL FORMULA:
Claim 2
Dependent Claim
89 words
A PROCESS FOR PREPARING A PHOTOGRAPHIC IMAGE WHICH COMPRISES DEVELOPING AN EXPOSED PHOTOGRAPHIC SILVER HALIDE EMULSION LAYER WITH A SILVER HALIDE DEVELOPING AGENT AND TRANSFERRING THE SILVER HALIDE BY DIFFUSION FROM THE UNDEVELOPED AREAS OF THE EMULSION LAYER TO A SUPPORTED IMAGE RECEIVING LAYER CONTAININ DEELOPING NUCLEI, TRANSFER BEING EFFECTED IN CONTIGUITY WITH SUFFICIENT SILVER HALIDE SOLVENT TO REMOVE SUBSTANTIALLY ALL UNDEVELOPED SILVER HALIDE FROM THE EMULSION LAYER, AN ALKANOLAMINE AND IN ADDITION, A TONING COMPOUND, SAID COMPOUND BEING DIFFERENT FROM THE SILVER HALIDE SOLVENT, HAVING THE GENERAL FORMULA:
References Cited (Backward Citations)
US2698245A
Cited
US2875048A
Cited
US3017270A
Cited
FR1243430A
Cited
BE594237A
Cited
US2984565A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-31 | 1969-08-02 | 1970-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-31 | 1973-08-02 | 1974-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-31 | 1977-08-02 | 1978-02-01 | $7700.00 | Window Closed / Lapsed |