US3173789A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and composition for inhibiting silver sludge in thiosulfate monobaths
Assignee: Eastman Kodak Co
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Filing: 1962-01-29
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Granted: 1965-03-16
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Expires: 1982-01-29
Abstract
No abstract record available.
Inventors
- 👤 James R King
- 👤 James R Moran
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:32
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/26; G03C5/38; G03C5/383
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
A MONOBATH COMPOSTION FOR SIMULTANEOUSLY DEVELOPING AND FIXING AN EXPOSED PHTOGRAPHIC SILVER HALIDE EMULSION LAYER COMPRISING AN AQUEOUS ALKALINE SOLUTION OF A PHOTOGRAPHIC SILVER HALIDE DEVELOPING AGENT FOR REDUCING EXPOSED SILVER HALIDE TO METALLIC SILVER, AT LEAST 80 GRAMS PER LITER OF SOLUTION OF A WATER-SOLUBLE THIOSULFATE, A WATER-SOLUBLE HYDROXYALKYLAMINE, AND FROM ABOUT 0.001 TO ABOUT 1.0 GRAM PER LITER OF SOLUTION OF A HETEROCYCLIC MERCAPTAN CAPABLE OF ADSORBING SILVER COMPOUNDS FORMED BY PHOTOGRAPHIC DEVELOPMENT TO SOLUBILIZE SUCH SILVER COMPOUNDS, SAID HETEROCYCLIC MERCAPTAN BEING SELECTED FROM THE CLASS CONSISTING OF MERCAPTOTETRAXOLES, MERCAPTO-1,3,4-OXADIAZOLES AND MERCAPTO-1,3,4-THIADIAZOLES.
Claim 2
Dependent Claim
94 words
A MONOBATH COMPOSTION FOR SIMULTANEOUSLY DEVELOPING AND FIXING AN EXPOSED PHTOGRAPHIC SILVER HALIDE EMULSION LAYER COMPRISING AN AQUEOUS ALKALINE SOLUTION OF A PHOTOGRAPHIC SILVER HALIDE DEVELOPING AGENT FOR REDUCING EXPOSED SILVER HALIDE TO METALLIC SILVER, AT LEAST 80 GRAMS PER LITER OF SOLUTION OF A WATER-SOLUBLE THIOSULFATE, A WATER-SOLUBLE HYDROXYALKYLAMINE, AND FROM ABOUT 0.001 TO ABOUT 1.0 GRAM PER LITER OF SOLUTION OF A HETEROCYCLIC MERCAPTAN CAPABLE OF ADSORBING SILVER COMPOUNDS FORMED BY PHOTOGRAPHIC DEVELOPMENT TO SOLUBILIZE SUCH SILVER COMPOUNDS, SAID HETEROCYCLIC MERCAPTAN BEING SELECTED FROM THE CLASS CONSISTING OF MERCAPTOTETRAXOLES, MERCAPTO-1,3,4-OXADIAZOLES AND MERCAPTO-1,3,4-THIADIAZOLES.
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) | 1968-03-15 | 1968-09-14 | 1969-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-15 | 1972-09-14 | 1973-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-15 | 1976-09-14 | 1977-03-16 | $7700.00 | Window Closed / Lapsed |