Patent US3958992A successfully refreshed from Google Patents.
US3958992A
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1,3-Disulfonylcycloalkanes as silver halide solvents
Assignee: Polaroid Corp
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Filing: 1974-12-23
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Granted: 1976-05-25
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Expires: 1994-12-23
Abstract
Abstract 1,3-disulfonylcycloalkanes substituted in the 2-position with at least one hydrogen atom are employed as silver halide complexing agents in both conventional and diffusion transfer photography. Preferred compounds are those possessing an S-containing moiety substituted in the 2-position and particularly those containing 6, 7 or 8 members in the cyclic ring and substituted in the 2-position with R 2 -S-CH 2 ) m wherein R 2 is a hydrocarbon radical and m is a whole number 0 to 5. The latter thioether-substituted 1,3-disulfonylcycloalkanes comprise the novel compounds of the present invention.
Inventors
- 👤 Richard B. Greenwald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:07
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/32; G03C8/36; G03C8/365; C; C07; C07D; C07D339/00; C07D339/08; G03C5/00; G03C5/26; G03C5/38
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
49 words
A photographic processing composition comprising an aqueous alkaline processing solution of a silver halide developing agent and 1,3-disulfonylcycloalkane dissolved therein as a silver halide solvent, said 1,3-disulfonylcycloalkane possessing 6, 7, or 8 members in in the cyclic ring and substituted in the 2-position with at least one hydrogen atom.
Claim 2
Dependent Claim
49 words
A photographic processing composition comprising an aqueous alkaline processing solution of a silver halide developing agent and 1,3-disulfonylcycloalkane dissolved therein as a silver halide solvent, said 1,3-disulfonylcycloalkane possessing 6, 7, or 8 members in in the cyclic ring and substituted in the 2-position with at least one hydrogen atom.
Claim 3
Dependent Claim
21 words
A photographic processing composition as defined in claim 1 wherein said 1,3-disulfonylcycloalkane is substituted in the 2-position with two hydrogen atoms.
Claim 4
Dependent Claim
14 words
A photographic processing composition as defined in claim 2 wherein said 1,3-disulfonylcycloalkane is 1,3-dithione-1,1,3,3-tetraoxide.
Claim 5
Dependent Claim
14 words
A photographic processing composition as defined in claim 2 wherein said 1,3-disulfonylcycloalkane is 1,3-dithiepane-1,1,3,3-tetraoxide.
Claim 6
Dependent Claim
86 words
A photographic processing composition as defined in claim 1 wherein said 1,3-disulfonylcycloalkane is substituted in the 2-position with a hydrogen atom and a monovalent organic radical having the formula R 2 -S-(CH 2 ) m wherein R 2 is a hydrocarbon radical containing up to 20 carbon atoms selected from alkyl, aryl, alkaryl and aralkyl, said hydrocarbon radical being unsubstituted or substituted with a solubilizing group selected from carboxy, sulfo, hydroxy and amino and m is a whole number 0, 1, 2, 3, 4 or 5.
Claim 7
Dependent Claim
14 words
A photographic processing composition as defined in claim 5 wherein said 1,3-disulfonylcycloalkane is ##SPC6##
Claim 8
Dependent Claim
14 words
A photographic processing composition as defined in claim 5 wherein said 1,3-disulfonylcycloalkane is ##SPC7##
Claim 9
Dependent Claim
15 words
A photographic processing composition as defined in claim 1 which additionally includes a viscosity-increasing reagent.
Claim 10
Dependent Claim
72 words
A photographic process for forming a water-soluble complex silver salt with the unexposed and undeveloped silver halide of a photosensitive element exposed imagewise and developed but unfixed which comprises treating said silver halide with an aqueous alkaline processing composition comprising a 1,3-disulfonylcycloalkane dissolved therein as a silver halide solvent, said 1,3-disulfonylcycloalkane possessing 6, 7 or 8 members in the cyclic ring and substituted in the 2-position with at least one hydrogen atom.
Claim 11
Dependent Claim
72 words
A photographic process for forming a water-soluble complex silver salt with the unexposed and undeveloped silver halide of a photosensitive element exposed imagewise and developed but unfixed which comprises treating said silver halide with an aqueous alkaline processing composition comprising a 1,3-disulfonylcycloalkane dissolved therein as a silver halide solvent, said 1,3-disulfonylcycloalkane possessing 6, 7 or 8 members in the cyclic ring and substituted in the 2-position with at least one hydrogen atom.
Claim 12
Dependent Claim
20 words
A photographic process as defined in claim 9 wherein said 1,3-disulfonylcycloalkane is substituted in the 2-position with two hydrogen atoms.
Claim 13
Dependent Claim
13 words
A photographic process as defined in claim 10 wherein said 1,3-disulfonylcycloalkane is 1,3-dithiane-1,1,3,3-tetraoxide.
Claim 14
Dependent Claim
13 words
A photographic process as defined in claim 10 wherein said 1,3-disulfonylcycloalkane is 1,3dithiepane-1,1,3,3-tetraoxide.
Claim 15
Dependent Claim
85 words
A photographic process as defined in claim 9 wherein said 1,3-disulfonylcycloalkane is substituted in the 2-position with a hydrogen atom and a monovalent organic radical having the formula R 2 -S-(CH 2 ) m wherein R 2 is a hydrocarbon radical containing up to 20 carbon atoms selected from alkyl, aryl, alkaryl and aralkyl, said hydrocarbon radical being unsubstituted or substituted with a solubilizing group selected from carboxy, sulfo, hydroxy and amino and m is a whole number 0, 1, 2, 3, 4 or 5.
Claim 16
Dependent Claim
13 words
A photographic process as defined in claim 13 wherein said 1,3-disulfonylcycloalkane is ##SPC8##
Claim 17
Dependent Claim
13 words
A photographic process as defined in claim 13 wherein said 1,3-disulfonylcycloalkane is ##SPC9##
Claim 18
Dependent Claim
114 words
A diffusion transfer photographic process comprising the steps of: 1. reacting exposed silver halide of an imagewise exposed photosensitive emulsion layer carried on a support with a silver halide developing agent in aqueous alkaline solution; 2. reacting unreduced silver halide of said photosensitive emulsion with a 1,3-disulfonylcycloalkane possessing 6, 7 or 8 members in the cyclic ring and substituted in the 2-position with at least one hydrogen atom, said 1,3-disulfonylcycloalkane being capable of reacting with silver halide to form a complex silver salt that is soluble in said alkaline solution; 3. transferring said complex silver salt to a superposed image-receiving layer; and 4. reducing said transferred complex silver salt to provide a silver image.
Claim 19
Dependent Claim
114 words
A diffusion transfer photographic process comprising the steps of: 1. reacting exposed silver halide of an imagewise exposed photosensitive emulsion layer carried on a support with a silver halide developing agent in aqueous alkaline solution; 2. reacting unreduced silver halide of said photosensitive emulsion with a 1,3-disulfonylcycloalkane possessing 6, 7 or 8 members in the cyclic ring and substituted in the 2-position with at least one hydrogen atom, said 1,3-disulfonylcycloalkane being capable of reacting with silver halide to form a complex silver salt that is soluble in said alkaline solution; 3. transferring said complex silver salt to a superposed image-receiving layer; and 4. reducing said transferred complex silver salt to provide a silver image.
Claim 20
Dependent Claim
20 words
A photographic process as defined in claim 16 wherein said 1,3-disulfonylcycloalkane is substituted in the 2-position with two hydrogen atoms.
Claim 21
Dependent Claim
13 words
A photographic process as defined in claim 17 wherein said 1,3-disulfonylcycloalkane is 1,3-dithiane-1,1,3,3-tetraoxide.
Claim 22
Dependent Claim
13 words
A photographic process as defined in claim 17 wherein said 1,3-disulfonylcycloalkane is 1,3-dithiepane-1,1,3,3-tetraoxide.
Claim 23
Dependent Claim
85 words
A photographic process as defined in claim 16 wherein said 1,3-disulfonylcycloalkane is substituted in the 2-position with a hydrogen atom and a monovalent organic radical having the formula R 2 -S-(CH 2 ) m wherein R 2 is a hydrocarbon radical containing up to 20 carbon atoms selected from alkyl, aryl, alkaryl and aralkyl, said hydrocarbon radical being unsubstituted or substituted with a solubilizing group selected from carboxy, sulfo, hydroxy and amino and m is a whole number 0, 1, 2, 3, 4 or 5.
Claim 24
Dependent Claim
13 words
A photographic process as defined in claim 20 wherein said 1,3-disulfonylcycloalkane is ##SPC10##
Claim 25
Dependent Claim
13 words
A photographic process as defined in claim 20 wherein said 1,3-disulfonylcycloalkane is ##SPC11##
Claim 26
Dependent Claim
14 words
A photographic process as defined in claim 16 which additionally includes a viscosity-increasing reagent.
References Cited (Backward Citations)
US2767195A
Cited
US3769014A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-05-25 | 1979-11-24 | 1980-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-25 | 1983-11-24 | 1984-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-25 | 1987-11-24 | 1988-05-25 | $7700.00 | Window Closed / Lapsed |