US3232758A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic diffusion transfer process
Assignee: Eastman Kodak Co
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Filing: 1960-04-11
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Granted: 1966-02-01
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Expires: 1980-04-11
Abstract
No abstract record available.
Inventors
- 👤 Holstead Colin
- 👤 Leslie A Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:37
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/24; G03C8/243
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A PROCESS FOR PREPARING A PHOTOGRAPIC IMAGE BY THE DIFFUSION TRANSFER PROCESS COMPRISIG DEVELOPING A LATEN IMAGE IN A PHOTOGRAPHIC SILVER HALIDE EMULSION. TRANSFERRING THE SILVER HALIDE BY DIFFUSION FROM THE UNDEVELOPED AREAS OF THE EMULSION LAYER TO AN IMAGE-RECEIVING LAYER CONTAINING A SILVER PRECIPITATING AGENT, THE TRANSFER BEING EFFECTED IN CONTIGUITY WITH A SILVER HALIDE SOLVENT AND A COMPOUND OF THE CLASS CONSISTING OF 1-BENZLTHIOSEMICARBAZIDE, METHYL B-BENZOYLDITHIOCARBAZINATE, METHYL B-BENZOYLDITHIOCARBAZINATE, 1-BENZOYLITHIOSEMICARBAZIDE, 1-P-TOLUENESULPHONYLTHIOSEMICARBAZIDE, AND 1-(2''-FURFURYL)THIOSEMICARBAZIDE.
Claim 2
Dependent Claim
74 words
A PROCESS FOR PREPARING A PHOTOGRAPIC IMAGE BY THE DIFFUSION TRANSFER PROCESS COMPRISIG DEVELOPING A LATEN IMAGE IN A PHOTOGRAPHIC SILVER HALIDE EMULSION. TRANSFERRING THE SILVER HALIDE BY DIFFUSION FROM THE UNDEVELOPED AREAS OF THE EMULSION LAYER TO AN IMAGE-RECEIVING LAYER CONTAINING A SILVER PRECIPITATING AGENT, THE TRANSFER BEING EFFECTED IN CONTIGUITY WITH A SILVER HALIDE SOLVENT AND A COMPOUND OF THE CLASS CONSISTING OF 1-BENZLTHIOSEMICARBAZIDE, METHYL B-BENZOYLDITHIOCARBAZINATE, METHYL B-BENZOYLDITHIOCARBAZINATE, 1-BENZOYLITHIOSEMICARBAZIDE, 1-P-TOLUENESULPHONYLTHIOSEMICARBAZIDE, AND 1-(2''-FURFURYL)THIOSEMICARBAZIDE.
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) | 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 |