US3265501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-swellable colloidal magnesium aluminum silicate photographic composition
Assignee: Eastman Kodak Co
•
Filing: 1960-12-23
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Granted: 1966-08-09
•
Expires: 1980-12-23
Abstract
No abstract record available.
Inventors
- 👤 Gerald J Johnston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:49
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/26; G03C5/261; G03C5/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
A METHOD OF FIXING A PHOTO-EXPOSED AND DEVELOPED SILVER HALIDE EMULSION LAYER COMPRISING IMBIBING IN SAID SILVER HALIDE EMULSION LAYER A VISCOUS PHOTOGRAPHIC SILVER HALIDE PROCESSING SOLUTION COMPRISING (A) A SILVER HALIDE FIXING AGENT SELECTED FROM THE CLASS CONSISTING OF ALKAN METAL THIOSULFATES, ALKALI METAL THIOCYANATES, AMMONIUM THIOSULFATE AND AMMONIUM THIOCYANATE AND (B) A WATER-SWELLABLE, COLLOIDAL MAGNESIUM ALUMINUM SILICATE BELONGING TO THE MONTMORILLONITE GROUP OF MINERALS HAVING AT LEAST 90% MAGNESIUM ALUMINUM SILICATE CONTENT, IN AN AMOUNT FROM ABOUT 0.5 PERCENT TO ABOUT 5.0 PERCENT OF THE TOTAL WEIGHT OF THE SOLUTION.
Claim 2
Independent Claim
92 words
A METHOD OF FIXING A PHOTO-EXPOSED AND DEVELOPED SILVER HALIDE EMULSION LAYER COMPRISING IMBIBING IN SAID SILVER HALIDE EMULSION LAYER A VISCOUS PHOTOGRAPHIC SILVER HALIDE PROCESSING SOLUTION COMPRISING (A) A SILVER HALIDE FIXING AGENT SELECTED FROM THE CLASS CONSISTING OF ALKAN METAL THIOSULFATES, ALKALI METAL THIOCYANATES, AMMONIUM THIOSULFATE AND AMMONIUM THIOCYANATE AND (B) A WATER-SWELLABLE, COLLOIDAL MAGNESIUM ALUMINUM SILICATE BELONGING TO THE MONTMORILLONITE GROUP OF MINERALS HAVING AT LEAST 90% MAGNESIUM ALUMINUM SILICATE CONTENT, IN AN AMOUNT FROM ABOUT 0.5 PERCENT TO ABOUT 5.0 PERCENT OF THE TOTAL WEIGHT OF THE SOLUTION.
References Cited (Backward Citations)
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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) | 1969-08-08 | 1970-02-07 | 1970-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-08 | 1974-02-07 | 1974-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-08 | 1978-02-07 | 1978-08-09 | $7700.00 | Window Closed / Lapsed |