US3307944A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mercapto-dihydrocarbyl-triazoles in diffusion transfer process
Assignee: Agfa Gevaert NV
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Filing: 1963-02-20
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Granted: 1967-03-07
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Expires: 1983-02-20
Abstract
No abstract record available.
Inventors
- 👤 Weyde Edith
- 👤 Rintelen Harald Von
- 👤 Konig Anita Von
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:52
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/24; G03C8/243
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
IN THE DIFFUSION TRANSFER PROCESS BY WHICH AN IMAGEWISE EXPOSED SILVER HALIDE EMULSION IS DEVELOPED IN CONTACT WITH A RECEIVING LAYER TO CAUSE UNDEVELOPED SILVER HALIDE IN THE EMULSION TO TRANSFER TO THE RECEIVING LAYER AND THERE BE CONVERTED TO A VISIBLE IMAGE, THE IMPROVEMENT ACCORDING TO WHICH THE TRANSFER IS ACCELERATED AND THE IMAGE TONE IMPROVED BY CARRYING OUT THE DEVELOPING IN THE PRESENCE OF A 3-MERCAPTO-4,5-DIHYDROCARBYL-1,2,4TRIAZOLE IN WHICH THE HYDROCARBYL GROUPS ARE ALKYL OR OLEFINICALLY UNSATURATED ALKYL HAVING UP TO 3 CARBON ATOMS, THE TRIAZOLE BEING PRESENT IN A CONCENTRATION OF ABOUT 15 TO 50 MILLIGRAMS PER LITER OF THE DEVELOPER.
Claim 2
Dependent Claim
103 words
IN THE DIFFUSION TRANSFER PROCESS BY WHICH AN IMAGEWISE EXPOSED SILVER HALIDE EMULSION IS DEVELOPED IN CONTACT WITH A RECEIVING LAYER TO CAUSE UNDEVELOPED SILVER HALIDE IN THE EMULSION TO TRANSFER TO THE RECEIVING LAYER AND THERE BE CONVERTED TO A VISIBLE IMAGE, THE IMPROVEMENT ACCORDING TO WHICH THE TRANSFER IS ACCELERATED AND THE IMAGE TONE IMPROVED BY CARRYING OUT THE DEVELOPING IN THE PRESENCE OF A 3-MERCAPTO-4,5-DIHYDROCARBYL-1,2,4TRIAZOLE IN WHICH THE HYDROCARBYL GROUPS ARE ALKYL OR OLEFINICALLY UNSATURATED ALKYL HAVING UP TO 3 CARBON ATOMS, THE TRIAZOLE BEING PRESENT IN A CONCENTRATION OF ABOUT 15 TO 50 MILLIGRAMS PER LITER OF THE DEVELOPER.
References Cited (Backward Citations)
US2432506A
Cited
US3017270A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-03-06 | 1970-09-05 | 1971-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-06 | 1974-09-05 | 1975-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-06 | 1978-09-05 | 1979-03-07 | $7700.00 | Window Closed / Lapsed |