US4940653A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multilayered color photographic material having an alkali soluble interlayer
Assignee: Agfa Gevaert AG
•
Filing: 1989-09-22
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Granted: 1990-07-10
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Expires: 2009-09-22
Abstract
Abstract In a process for the preparation of a multilayered photographic material in which the layers are applied in at least two stages and the material is dried and wound up in between the stages, sticking of the semi-finished preparations does not occur if the uppermost layer applied in the first stage contains polymer particles soluble in alkali and having an average particle diameter from 0.2 to 5.0 μm.
Inventors
- 👤 Prem Lalvani
- 👤 Diethart Lademann
- 👤 Hans Buschmann
- 👤 Heinz Reif
- 👤 Walther Cohnen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:41
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/3029; G03C1/00; G03C1/76; G03C1/95; G03C1/74; G03C2001/7481; Y; Y10; Y10S; Y10S430/00; Y10S430/151; Y10S430/162
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
108 words
A silver halide color photographic element comprising a support, on the support at least one red-sensitive silver halide emulsion layer containing at least one non-diffusible cyan coupler, at least one green-sensitive silver halide emulsion layer containing at least one non-diffusible magenta coupler, at least one blue-sensitive silver halide emulsion layer containing at least one yellow coupler and at least one interlayer which is not the layer of the photographic element furthermost from the support said interlayer containing polymer particles soluble in alkali in a quantity of from 20 to 200 mg/m 2 of the photographic element and having an average particle diameter of from 0.5 to 3.0 μm.
Claim 2
Dependent Claim
108 words
A silver halide color photographic element comprising a support, on the support at least one red-sensitive silver halide emulsion layer containing at least one non-diffusible cyan coupler, at least one green-sensitive silver halide emulsion layer containing at least one non-diffusible magenta coupler, at least one blue-sensitive silver halide emulsion layer containing at least one yellow coupler and at least one interlayer which is not the layer of the photographic element furthermost from the support said interlayer containing polymer particles soluble in alkali in a quantity of from 20 to 200 mg/m 2 of the photographic element and having an average particle diameter of from 0.5 to 3.0 μm.
Claim 3
Dependent Claim
22 words
A silver halide color photographic element of claim 1 wherein the polymer particles consist of cellulose derivatives of semi-esters of dicarboxylic acids.
Claim 4
Dependent Claim
21 words
A silver halide photographic element of claim 1 wherein the polymer particles are soluble in water at a pH above 7.
Claim 5
Dependent Claim
29 words
A silver halide color photographic element according to claim 1 wherein the polymer particles are used in a quantity of from 50 to 120 mg/m 2 of photographic material.
Claim 6
Dependent Claim
20 words
A silver halide color photographic element according to claim 1 wherein the polymer particles consist of hydroxy propylmethyl cellulose hexahydrophthalate.
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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) | 1993-07-09 | 1994-01-08 | 1994-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-09 | 1998-01-08 | 1998-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-09 | 2002-01-08 | 2002-07-10 | $7700.00 | Window Closed / Lapsed |