US3785814A
Expired / Lapsed
US
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Diffusion transfer color processes and products and compositions useful therein
Assignee: Polaroid Corp
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Filing: 1971-12-23
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Granted: 1974-01-15
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Expires: 1991-12-23
Abstract
Abstract Dye developer diffusion transfer processes are disclosed utilizing 6-alkylamino purines, preferably in combination with a silver halide solvent. In particularly useful embodiments, processing is effected in the presence also of a uracil and bis( Beta -aminoethyl)-sulfide.
Inventors
- 👤 E Land
- 👤 S Bloom
- 👤 H Rogers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:57
CPC Classifications
G; G03; G03C; G03C8/00; G03C1/00; G03C1/005; G03C1/06; G03C1/34
Claims Analysis
Total Claims: 47
Claim 1
Independent Claim
12 words
A photographic color process as defined in claim 1 wherein R is
Claim 2
Dependent Claim
12 words
A photographic color process as defined in claim 1 wherein R is
Claim 3
Dependent Claim
12 words
A photographic color process as defined in claim 1 wherein R is
Claim 4
Dependent Claim
74 words
A photographic color process as defined in claim 1 wherein an imagewise distribution of unoxidized dye developer is formed in undeveloped areas of said silver halide emulsion as a function of said development, said process including the step of transferring by diffusion at least a portion of said imagewise distribution of unoxidized dye developer to an image-receiving layer in superposed relationship with said silver halide emulsion, thereby providing a positive diffusion transfer dye image.
Claim 5
Dependent Claim
65 words
A photographic color process as defined in claim 1 wherein the photosensitive element which is exposed comprises a blue-sensitive silver halide emulsion having a yellow dye developer associated therewith, a green-sensitive silver halide emulsion having a magenta dye developer associated therewith, and a red-sensitive silver halide emulsion having a cyan dye developer associated therewith, and said positive diffusion transfer dye image is a multicolor image.
Claim 6
Dependent Claim
31 words
A photographic color process as defined in claim 6 wherein said 6-alkylamino purine is initially present in said processing composition in a concentration of about 0.01 to 1.0 percent by weight.
Claim 7
Dependent Claim
19 words
A photographic processing composition comprising water, alkali, a silver halide developing agent and a 6-alkylamino purine of the formula:
Claim 8
Dependent Claim
30 words
A photographic processing composition as defined in claim 8 wherein said 6-alkylamino purine is present in said processing composition in a concentration of about 0.01 to 1.0 percent by weight.
Claim 9
Dependent Claim
12 words
A photographic processing composition as defined in claim 8 wherein R is
Claim 10
Dependent Claim
12 words
A photographic processing composition as defined in claim 8 wherein R is
Claim 11
Dependent Claim
18 words
A photographic processing composition comprising water, alkali, a silver halide solvent and a 6-alkylamino purine of the formula:
Claim 12
Dependent Claim
30 words
A photographic processing composition as defined in claim 12 wherein said 6-alkylamino purine is present in said processing composition in a concentration of about 0.01 to 1.0 percent by weight.
Claim 13
Dependent Claim
12 words
A photographic processing composition as defined in claim 12 wherein R is
Claim 14
Dependent Claim
12 words
A photographic processing composition as defined in claim 12 wherein R is
Claim 15
Dependent Claim
15 words
A photographic processing composition as defined in claim 12 including a silver halide developing agent.
Claim 16
Dependent Claim
13 words
A photographic processing composition as defined in claim 12 including a viscosity-increasing material.
Claim 17
Dependent Claim
14 words
A photographic processing composition as defined in claim 12 including a quaternary ammonium salt.
Claim 18
Dependent Claim
39 words
A photosensitive element comprising a support, a lAyer on said support containing a photosensitive silver halide emulsion, a layer on said support containing a dye developer, and a layer on said support containing a 6-alkylamino purine of the formula:
Claim 19
Dependent Claim
46 words
A photosensitive element as defined in claim 19 including a blue-sensitive silver halide emulsion having a yellow dye developer associated therewith, a green-sensitive silver halide emulsion having a magenta dye developer associated therewith, and a red-sensitive silver halide emulsion having a cyan dye developer associated therewith.
Claim 20
Dependent Claim
23 words
A photosensitive element as defined in claim 20 wherein said 6-alkylamino purine is contained in a layer over said blue-sensitive silver halide emulsion.
Claim 21
Dependent Claim
11 words
A photosensitive element as defined in claim 19 wherein R is
Claim 22
Dependent Claim
20 words
A photographic color process as defined in claim 1 wherein said development is effected at a temperature above 75* F.
Claim 23
Dependent Claim
44 words
A photographic color process as defined in claim 5 wherein a layer containing titanium dioxide is positioned between said image-receiving layer and said silver halide emulsion whereby said positive dye image may be viewed without separating said image-receiving layer from said silver halide emulsion.
Claim 24
Dependent Claim
20 words
A photographic color process as defined in claim 24 wherein said titanium dioxide is initially present in said processing composition.
Claim 25
Dependent Claim
17 words
A photographic color process as defined in claim 1 wherein a silver halide solvent is also present.
Claim 26
Dependent Claim
20 words
A photographic color process as defined in claim 1 wherein said development is effected in the presence of a uracil.
Claim 27
Dependent Claim
15 words
A photographic color process as defined in claim 27 wherein said uracil is 5-methyl uracil.
Claim 28
Dependent Claim
24 words
A photographic color process as defined in claim 1 wherein said development is effected in the presence of 5-methyl uracil and bis-( Beta -aminoethyl)-sulfide.
Claim 29
Dependent Claim
12 words
A photographic processing composition comprising water, a uracil and bis-( Beta -aminoethyl)-sulfide.
Claim 30
Dependent Claim
15 words
A photographic processing composition as defined in claim 30 wherein said uracil is 6-methyl uracil.
Claim 31
Dependent Claim
15 words
A photographic processing composition as defined in claim 30 including a silver halide developing agent.
Claim 32
Dependent Claim
47 words
In a photographic process wherein a silver halide emulsion is exposed and developed with a silver halide developing agent, the step of contacting undeveloped silver halide with a processing composition containing a uracil and bis-( Beta -aminoethyl)-sulfide during or after development of said exposed silver halide emulsion.
Claim 33
Dependent Claim
14 words
The photographic process as defined in claim 33 wherein said uracil is 6-methyl uracil.
Claim 34
Dependent Claim
29 words
The photographic process as defined in claim 33 wherein said uracil and said bis-( Beta -aminoethyl)-sulfide are present in the same processing composition as said silver halide developing agent.
Claim 35
Dependent Claim
70 words
A photographic product for use in forming a color image by diffusion transfer, said product comprising, in combination, a photosensitive element, a rupturable container releasably holding a viscous, alkaline processing composition, and an image-receiving layer, said photosensitive element comprising a support carrying at least one photosensitive silver halide emulsion, each said silver halide emulsion having associated therewith a dye developer, said product also including a 6-alkylamino purine of the formula:
Claim 36
Dependent Claim
11 words
A photographic product as defined in claim 36 wherein R is
Claim 37
Dependent Claim
11 words
A photographic product as defined in claim 36 wherein R is
Claim 38
Dependent Claim
11 words
A photographic product as defined in claim 36 wherein R is
Claim 39
Dependent Claim
50 words
A photographic product as defined in claim 36 wherein said photosensitive element comprises a blue-sensitive silver halide emulsion having a yellow dye developer associated therewith, a green-sensitive silver halide Emulsion having a magenta dye developer associated therewith, and a red-sensitive silver halide emulsion having a cyan dye developer associated therewith.
Claim 40
Dependent Claim
17 words
A photographic product as defined in claim 36 wherein said processing composition includes titanium dioxide dispersed therein.
Claim 41
Dependent Claim
16 words
A photographic product as defined in claim 36 wherein a silver halide solvent is also present.
Claim 42
Dependent Claim
16 words
A photographic product as defined in claim 42 wherein said silver halide solvent is a uracil.
Claim 43
Dependent Claim
14 words
A photographic product as defined in claim 43 wherein said uracil is 5-methyl uracil.
Claim 44
Dependent Claim
14 words
A photographic product as defined in claim 43 wherein said uracil is 6-methyl uracil.
Claim 45
Dependent Claim
15 words
A photographic product as defined in claim 43 wherein bis-( Beta -aminoethyl)-sulfide is also present.
Claim 46
Dependent Claim
30 words
A photographic product as defined in claim 36 wherein said 6-alkylamino purine is initially present in said processing composition in a concentration of about 0.01 to 1.0 percent by weight.
Claim 47
Dependent Claim
18 words
A photographic product as defined in claim 36 wherein said image-receiving layer is carried on a transparent support.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-14 | 1977-07-16 | 1978-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-14 | 1981-07-16 | 1982-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-14 | 1985-07-16 | 1986-01-15 | $7700.00 | Window Closed / Lapsed |