US2614927A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rapid processing of photographic materials
Assignee: Eastman Kodak Co
•
Filing: 1949-06-01
•
Granted: 1952-10-21
•
Expires: 1969-06-01
Abstract
No abstract record available.
Inventors
- 👤 Broughton Geoffrey
- 👤 Robert N Woodward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:21
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/485; G03C1/06; G03C1/42; G03C5/00; G03C5/26; G03C5/262; G03C5/38; G03C5/39; Y; Y10; Y10S; Y10S430/00; Y10S430/164
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
90 words
A RAPID PROCESS FOR THE FORMATION OF AN IMASGE IN A PHOTOGRAPHIC EMULSION LAYER WHICH COMPRISES EXPOSING A SILVER HALIDE EMULSION LAYER CONTAINING A DEVELOPING AGENT SELECTED FROM THE GROUP CONSISTING OF 3,4-DIHYDROXY DIPHENYL: 2.5-DIHYDROXY DIPHENYL; AND 2,3-DIHYDROXY DIPHENYL, DEVELOPING A SILVER IMAGE IN SAID EXPOSED LAYER BY TREATMENT WITH AN ALKALINE SOLUTION, AND IMMEDIATELY THEREAFTER STABILIZING SAID LAYER WITH A SOLUTION OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL AND AMMONIUM THIOCYANATES AND THIOSULFATES, THIOSULFATES, THIOUREAS AND THIOGLYCOLLIC ACID, AND DRYING SAID LAYER WITHOUT FURTHER TREATMENT.
Claim 2
Dependent Claim
90 words
A RAPID PROCESS FOR THE FORMATION OF AN IMASGE IN A PHOTOGRAPHIC EMULSION LAYER WHICH COMPRISES EXPOSING A SILVER HALIDE EMULSION LAYER CONTAINING A DEVELOPING AGENT SELECTED FROM THE GROUP CONSISTING OF 3,4-DIHYDROXY DIPHENYL: 2.5-DIHYDROXY DIPHENYL; AND 2,3-DIHYDROXY DIPHENYL, DEVELOPING A SILVER IMAGE IN SAID EXPOSED LAYER BY TREATMENT WITH AN ALKALINE SOLUTION, AND IMMEDIATELY THEREAFTER STABILIZING SAID LAYER WITH A SOLUTION OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL AND AMMONIUM THIOCYANATES AND THIOSULFATES, THIOSULFATES, THIOUREAS AND THIOGLYCOLLIC ACID, AND DRYING SAID LAYER WITHOUT FURTHER TREATMENT.
Claim 3
Dependent Claim
36 words
A LIGHT SENSITIVE PHOTOGRAPHIC ELEMENT COMPRISING A SUPPORT HAVING THEREON A DIRECT-POSITIVE SILVER HALIDE EMULSION LAYER CONTAINING A SUBSTANTIALLY WATER-INSOLUBLE HALIDE DEVELOPING AGENT SELECTED FROM THE GROUP CONSISTING OF 3,4-DIHYDROXY DIPHENYL; 2,5-DIHYDROXY DIPHENYL; AND 2,3-DIHYDROXY DIPHENYL.
Claim 4
Dependent Claim
36 words
A LIGHT SENSITIVE PHOTOGRAPHIC ELEMENT COMPRISING A SUPPORT HAVING THEREON A DIRECT-POSITIVE SILVER HALIDE EMULSION LAYER CONTAINING A SUBSTANTIALLY WATER-INSOLUBLE HALIDE DEVELOPING AGENT SELECTED FROM THE GROUP CONSISTING OF 3,4-DIHYDROXY DIPHENYL; 2,5-DIHYDROXY DIPHENYL; AND 2,3-DIHYDROXY DIPHENYL.
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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) | 1955-10-21 | 1956-04-21 | 1956-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-21 | 1960-04-21 | 1960-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-21 | 1964-04-21 | 1964-10-21 | $7700.00 | Window Closed / Lapsed |