US3853557A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic diffusion transfer element
Assignee: Eastman Kodak Co
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Filing: 1970-01-26
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Granted: 1974-12-10
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Expires: 1990-01-26
Abstract
Abstract A photographic silver salt diffusion transfer element of the integral type having the silver precipitation stratum located above a support and below the light-sensitive silver halide emulsion provided on the element is improved by providing a further silver precipitation layer over the light-sensitive emulsion. Elements provided with this stratum over the emulsion layer which are subjected to processing in equipment provided with rollers which contact the element result in elimination of scoring or marking of the element which may interfere with the transport of exposed elements through the processing apparatus.
Inventors
- 👤 H Fassbender
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:34
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/02; G03C8/04; G03C8/06; G03C8/24; G03C8/26; G03C8/28
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
85 words
A LIGHT-SENSITIVE PHOTOGRAPHIC ELEMENT COMPRISING A SUPPORT, A FIRST SILVER PRECIPITATING AGENT ON THE SUPPORT, A WATER SOLUBLE LIGHT-SENSITIVE SILVER HALIDE EMULSION LAYER PROVIDED OVER SAID PRECIPITATING AGENT AND BEING CAPABLE OF BEING REMOVED FROM SAID ELEMENT BY AQUEOUS WASHING WITHOUT REMOVING SAID FIRST PRECIPITATING AGENT, AND A TEMPORARY, REMOVABLE SECOND SILVER PRECIPITATING AGENT WHICH IS WATER PREMEABLE AND COATED OVER SAID EMULSION LAYER, SAID FIRST SILVER PRECIPITATING AGENT, SAID SILVER HALIDE EMULSION LAYER, AND SAID SECOND PRECIPITATING AGENT ALL BEING ON THE SAME SUPPORT.
Claim 2
Dependent Claim
85 words
A LIGHT-SENSITIVE PHOTOGRAPHIC ELEMENT COMPRISING A SUPPORT, A FIRST SILVER PRECIPITATING AGENT ON THE SUPPORT, A WATER SOLUBLE LIGHT-SENSITIVE SILVER HALIDE EMULSION LAYER PROVIDED OVER SAID PRECIPITATING AGENT AND BEING CAPABLE OF BEING REMOVED FROM SAID ELEMENT BY AQUEOUS WASHING WITHOUT REMOVING SAID FIRST PRECIPITATING AGENT, AND A TEMPORARY, REMOVABLE SECOND SILVER PRECIPITATING AGENT WHICH IS WATER PREMEABLE AND COATED OVER SAID EMULSION LAYER, SAID FIRST SILVER PRECIPITATING AGENT, SAID SILVER HALIDE EMULSION LAYER, AND SAID SECOND PRECIPITATING AGENT ALL BEING ON THE SAME SUPPORT.
Claim 3
Dependent Claim
29 words
A light-sensitive photographic element according to claim 1 wherein said silver halide emulsion layer comprises silver halide dispersed in a binder which comprises an alkali-soluble acid-insoluble carboxylated cellulose derivative.
Claim 4
Dependent Claim
31 words
A light-sensitive photographic element according to claim 2 wherein said binder is selected from the group consisting of dibasic acid half-esters of cellulose ethers, and dibasic acid half-esters of cellulose esters.
Claim 5
Dependent Claim
27 words
A light-sensitive photographic element according to claim 3 wherein said binder is a member selected from the group consisting of ethyl cellulose phthalate and cellulose acetate phthalate.
Claim 6
Dependent Claim
37 words
A light-sensitive photographic element according to claim 1 wherein said second silver precipitating agent is dispersed in a binder selected from the group consisting of gelatin, hydrophilic synthetic resins, cellulose ethers, and alkali-soluble, acid-insoluble carboxylated cellulose derivatives.
Claim 7
Dependent Claim
19 words
A light-sensitive photographic element according to claim 5 wherein the binder of said second silver precipitating agent comprises gelatin.
Claim 8
Dependent Claim
47 words
A light-sensitive photographic element according to claim 1 wherein each of said first and second silver precipitating agents is in a gelatin binder, the gelatin binder of said second silver precipitating agent having a lower melting point than the gelatin binder of said first silver precipitating agent.
Claim 9
Dependent Claim
36 words
A light-sensitive photographic element according to claim 5 wherein said second silver precipitating agent is a member selected from the group consisting of heavy metals, thiourea, mercaptans, stannous halides, heavy metal salts, and fogged silver halide.
Claim 10
Dependent Claim
90 words
In a process of producing an image in the silver precipitating layer of a photographically exposed integral silver halide diffusion transfer photographic element comprising a support, a silver precipitating layer, and a photographically exposed silver halide emulsion layer thereover, wherein the element is advanced through photographic development apparatus by work advancing means to provide a photographic image in said silver precipitating layer, the improvement which comprises utilizing an integral silver halide diffusion transfer photographic element according to claim 1 to reduce the accumulation of deposit on said work advancing means.
Claim 11
Dependent Claim
96 words
A method of forming a photographic image which comprises developing a latent image in the emulsion layer of an exposed element of claim 1 with an alkaline silver halide developing solution containing a silver halide developing agent and a silver halide solvent for a time sufficient to form a silver image and an imagewise distribution of a soluble silver complex to diffuse imagewise to said silver precipitating agents and the silver of said portion of silver complex to be precipitated by said agents and removing the emulsion layer and said second agent from said first agent.
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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) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |