US3137575A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic silver halide emulsions and elements containing a polyfructose
Assignee: EIDP Inc
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Filing: 1960-11-01
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Granted: 1964-06-16
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Expires: 1980-11-01
Abstract
No abstract record available.
Inventors
- 👤 Jr Vaughan Crandall Chambers
- 👤 Overman Joseph De Witt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 00:13
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
A PHOTOGRAPHIC SILVER HALIDE EMULSION COMPRISING, ON A DRY BASIS PER 100 PARTS BY WEIGHT OF G ELATIN, 20 TO 80 PARTS BY WEIGHT OF A WATER-SOLUBLE POLYFRUCTOSE HAVING AN AVERAGE MOLECULAR WEIGHT OF FROM 2,000 TO 200,000 AND 60 TO 150 PARTS BY WEIGHT OF A LIGHT-SSENSITIVE SILVER HALIDE.
Claim 2
Dependent Claim
50 words
A PHOTOGRAPHIC SILVER HALIDE EMULSION COMPRISING, ON A DRY BASIS PER 100 PARTS BY WEIGHT OF G ELATIN, 20 TO 80 PARTS BY WEIGHT OF A WATER-SOLUBLE POLYFRUCTOSE HAVING AN AVERAGE MOLECULAR WEIGHT OF FROM 2,000 TO 200,000 AND 60 TO 150 PARTS BY WEIGHT OF A LIGHT-SSENSITIVE SILVER HALIDE.
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) | 1967-06-16 | 1967-12-16 | 1968-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-16 | 1971-12-16 | 1972-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-16 | 1975-12-16 | 1976-06-16 | $7700.00 | Window Closed / Lapsed |