US3126282A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Najcoj-hzo
Assignee: —
•
Filing: —
•
Granted: 1964-03-24
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Expires: 1981-03-24
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:57
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C5/00; G03C5/26; G03C5/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
A REVERSAL PROCESS OF PHOTOGRAPHY IN WHICH AN EXPOSED PHOTOGRAPHIC ELEMENT HAVING AT LEAST ONE LIGHT-SENSITIVE SILVER HALIDE EMULSION LAYER CONTAINING A NON-DIFFUSING COLOR FORMER (A) IS GIVEN A FIRST DEVELOPMENT IN AN AQUEOUS ALKALINE DEVELOPER SOLUTION CONTAINING A DEVELOPING AGENT TO FORM SILVER IMAGES ONLY, (B) RE-EXPOSED TO LIGHT (C) GIVEN A SECOND DEVELOPMENT IN AN AQUEOUS DEVELOPER SOLUTION CONTAINING A PRIMARY AROMATIC AMINO COLOR DEVELOPING AGENT TO FORM BOTH SILVER AND DYE IMAGES IN THE REVERSE AREAS OF SAID EMULSION LAYER; SAID PROCESS BEING CHARACTERIZED IN THAT THE FIRST DEVELOPMENT IS CARRIED OUT IN A DEVELOPER SOLUTION CONTAINING ABOUT 0.005 TO ABOUT 0.1 MOLE OF IMIDAZOLE PER LITER OF SOLUTION.
Claim 2
Dependent Claim
112 words
A REVERSAL PROCESS OF PHOTOGRAPHY IN WHICH AN EXPOSED PHOTOGRAPHIC ELEMENT HAVING AT LEAST ONE LIGHT-SENSITIVE SILVER HALIDE EMULSION LAYER CONTAINING A NON-DIFFUSING COLOR FORMER (A) IS GIVEN A FIRST DEVELOPMENT IN AN AQUEOUS ALKALINE DEVELOPER SOLUTION CONTAINING A DEVELOPING AGENT TO FORM SILVER IMAGES ONLY, (B) RE-EXPOSED TO LIGHT (C) GIVEN A SECOND DEVELOPMENT IN AN AQUEOUS DEVELOPER SOLUTION CONTAINING A PRIMARY AROMATIC AMINO COLOR DEVELOPING AGENT TO FORM BOTH SILVER AND DYE IMAGES IN THE REVERSE AREAS OF SAID EMULSION LAYER; SAID PROCESS BEING CHARACTERIZED IN THAT THE FIRST DEVELOPMENT IS CARRIED OUT IN A DEVELOPER SOLUTION CONTAINING ABOUT 0.005 TO ABOUT 0.1 MOLE OF IMIDAZOLE PER LITER OF SOLUTION.
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) | 1967-03-24 | 1967-09-23 | 1968-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-24 | 1971-09-23 | 1972-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-24 | 1975-09-23 | 1976-03-24 | $7700.00 | Window Closed / Lapsed |