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US3941600A Expired / Lapsed US ⏱️ 0.0 years remaining

Method of forming a photographic emulsion layer

Assignee: Polaroid Corp
•
Filing: 1973-07-27
•
Granted: 1976-03-02
•
Expires: 1993-07-27
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Abstract

Abstract Silver halide emulsion layers are formed by applying a water-soluble silver halide complex to a gelled substrate, and treating to decomplex to form silver halide crystals therein.

Inventors

  • 👤 Vivian K. Walworth

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-29 07:34
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005

Claims Analysis

Total Claims: 19
Claim 1
Independent Claim 52 words
A method for forming a photographic silver halide emulsion layer which comprises applying to a layer of gelled colloid binder material an aqueous solution of a water-soluble complex of silver halide complexed with excess halide and crystallizing photosensitive silver halide crystals by decomplexation of said silver halide complex within said gelled layer.
Claim 2
Independent Claim 52 words
A method for forming a photographic silver halide emulsion layer which comprises applying to a layer of gelled colloid binder material an aqueous solution of a water-soluble complex of silver halide complexed with excess halide and crystallizing photosensitive silver halide crystals by decomplexation of said silver halide complex within said gelled layer.
Claim 3
Dependent Claim 12 words
A method as defined in claim 1 wherein said solution is saturated.
Claim 4
Dependent Claim 16 words
A method as defined in claim 1 wherein said colloid binder material is a natural material.
Claim 5
Dependent Claim 14 words
A method as defined in claim 3 wherein said colloid binder material is gelatin.
Claim 6
Dependent Claim 17 words
A method as defined in claim 1 wherein said colloid binder material is a synthetic polymeric material.
Claim 7
Dependent Claim 23 words
A method as defined in claim 1 wherein said gelled layer includes an agent for modulating the crystallization of said silver halide crystals.
Claim 8
Dependent Claim 27 words
A method as defined in claim 1 wherein said gelled layer includes particulate material adapted to provide nucleating material for the formation of said silver halide crystals.
Claim 9
Dependent Claim 18 words
A method as defined in claim 6 wherein said gelled substrate includes a water-soluble halide salt disposed therein.
Claim 10
Dependent Claim 23 words
A method as defined in claim 8 wherein said water-soluble halide salt comprises the same halide as the halide of the water-soluble complex.
Claim 11
Dependent Claim 16 words
A method as defined in claim 1 wherein said complex is a saturated silver bromide complex.
Claim 12
Dependent Claim 16 words
A method as defined in claim 1 wherein said gelled layer is carried on a support.
Claim 13
Dependent Claim 18 words
A method as defined in claim 1 which includes the step of washing said silver halide emulsion layer.
Claim 14
Dependent Claim 18 words
A method as defined in claim 1 which includes the step of drying said silver halide emulsion layer.
Claim 15
Dependent Claim 26 words
A method as defined in claim 1 wherein a photographic sensitizing agent is disposed in said gelled layer prior to the application of said water-soluble complex.
Claim 16
Dependent Claim 22 words
A method as defined in claim 1 wherein a photographic sensitizing agent is applied to said gelled layer subsequent to said crystallization.
Claim 17
Dependent Claim 114 words
A process for forming a multicolor photosensitive element which comprises depositing on a substrate a multiplicity of elemental portions wherein each of said elemental portions comprises dye image-forming material and sensitizing dye disposed in a colloid binder material wherein said elemental portions are made up of at least two sets of elemental portions sensitive to light of different wavelengths, which elemental portions form a pattern which simulates a color screen type of pattern; gelling said binder material and imbibing into said gelled elemental portions an aqueous solution of a water-soluble complex of silver halide complexed with excess halide and crystallizing photosensitive silver halide crystals by decomplexation of said halide complex within said gelled layer.
Claim 18
Dependent Claim 114 words
A process for forming a multicolor photosensitive element which comprises depositing on a substrate a multiplicity of elemental portions wherein each of said elemental portions comprises dye image-forming material and sensitizing dye disposed in a colloid binder material wherein said elemental portions are made up of at least two sets of elemental portions sensitive to light of different wavelengths, which elemental portions form a pattern which simulates a color screen type of pattern; gelling said binder material and imbibing into said gelled elemental portions an aqueous solution of a water-soluble complex of silver halide complexed with excess halide and crystallizing photosensitive silver halide crystals by decomplexation of said halide complex within said gelled layer.
Claim 19
Dependent Claim 16 words
The process as defined in claim 16 wherein said dye image-forming material is a dye developer.

References Cited (Backward Citations)

US1503595A Cited
US3000741A Cited
US3241970A Cited
US3511662A Cited
US3598593A Cited
US3600175A Cited
US3690918A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1979-03-02 1979-09-01 1980-03-02 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1983-03-02 1983-09-01 1984-03-02 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1987-03-02 1987-09-01 1988-03-02 $7700.00 Window Closed / Lapsed

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