US3655387A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antistatic photographic compositions
Assignee: Eastman Kodak Co
•
Filing: 1970-09-15
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Granted: 1972-04-11
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Expires: 1990-09-15
Abstract
Abstract Improved photographic compositions are disclosed comprising a support, a photographic silver halide layer and at least one layer containing a static-inhibiting amount of a compound which is a salt of glycerophosphoric acid.
Inventors
- 👤 Pierre Daniel Collet
- 👤 Guy Clero
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:49
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/85; G03C1/856
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
28 words
A photographic element according to claim 1 wherein said silver halide layer is a photographic silver halide emulsion layer comprising a static-inhibiting amount of an alkali metal glycerophosphate.
Claim 2
Dependent Claim
19 words
A photographic element according to claim 1 wherein said compound is sodium glycerophosphate incorporated in a gelatin backing layer.
Claim 3
Dependent Claim
25 words
A photographic element according to claim 1 wherein said silver halide layer is a photographic silver halide emulsion layer comprising sodium glycerophosphate and monoammonium phosphate.
Claim 4
Dependent Claim
24 words
A photographic element according to claim 1 wherein said salt of glycerophosphoric acid is potassium glycerophosphate, sodium glycerophosphate, calcium glycerophosphate acid or lithium glycerophosphate.
Claim 5
Dependent Claim
16 words
A photographic element according to claim 1 wherein said salt of glycerophosphoric acid is sodium glycerophosphate.
Claim 6
Dependent Claim
28 words
A photographic element according to claim 1 comprising from about 5 grams to about 60 grams of said salt of glycerophosphoric acid per 100 grams of binder vehicle.
Claim 7
Dependent Claim
31 words
A photographic element according to claim 1 comprising from about 15 grams to about 40 grams of said salt of glycerophosphoric acid per 100 grams of binder vehicle in said layer.
Claim 8
Dependent Claim
13 words
A photographic element according to claim 1 wherein said binder vehicle is gelatin.
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) | 1975-04-11 | 1975-10-11 | 1976-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-11 | 1979-10-11 | 1980-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-11 | 1983-10-11 | 1984-04-11 | $7700.00 | Window Closed / Lapsed |