US3955983A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for forming a color image on an exposed photosensitive material
Assignee: Fujifilm Holdings Corp
•
Filing: 1974-12-12
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Granted: 1976-05-11
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Expires: 1994-12-12
Abstract
Abstract A high contrast, high density color image is formed on a silver halide photosensitive monochromatic, e.g., irradiated by X-rays, by subjecting the photosensitive material to coupling or color development with a developer solution containing a p-phenylene diamine developing agent and 1-phenyl-3-pyrazolidone and then, without desilverization, to fixing. The coupler may be contained in the silver halide photo-emulsion or in a developing solution.
Inventors
- 👤 Yosuke Nakajima
- 👤 Yoshihiko Yamada
- 👤 Haruhiko Iwano
- 👤 Katsuhiko Ohtani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:36
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/16
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
105 words
In a process for forming a color image of an image on a photographic X-ray element having coated on opposite surfaces of a support monochromatically photosensitive silver halide emulsion layers including the steps of subjecting the X-ray image-wise exposed element to color development in the presence of a color coupler with a developer solution containing a p-phenylene diamine developing agent whereby said color coupler couples with the oxidation product of said developing agent to form a color image in said element and fixing said color image in said element, the improvement comprising omitting desilverization from said color development and said developer solution additionally containing 1-phenyl-3-pyrazolidone.
Claim 2
Dependent Claim
105 words
In a process for forming a color image of an image on a photographic X-ray element having coated on opposite surfaces of a support monochromatically photosensitive silver halide emulsion layers including the steps of subjecting the X-ray image-wise exposed element to color development in the presence of a color coupler with a developer solution containing a p-phenylene diamine developing agent whereby said color coupler couples with the oxidation product of said developing agent to form a color image in said element and fixing said color image in said element, the improvement comprising omitting desilverization from said color development and said developer solution additionally containing 1-phenyl-3-pyrazolidone.
Claim 3
Dependent Claim
18 words
The process as claimed in claim 1, wherein said color coupler is present in said silver halide emulsion.
Claim 4
Dependent Claim
17 words
The process as claimed in claim 1, wherein said color coupler is present in said developer solution.
Claim 5
Dependent Claim
15 words
The process as claimed in claim 1, wherein said developer solution additionally contains 6-nitrobenzimidazole nitrate.
Claim 6
Dependent Claim
33 words
The process as claimed in claim 1, wherein said developer solution additionally contains a poly(oxyethylene)glycol or a cationic, nonionic or anionic derivative thereof, said poly-(oxyethylene)glycol being soluble in water or swelled by water.
Claim 7
Dependent Claim
15 words
The process as claimed in claim 5, wherein said developer solution additionally contains 6-nitrobenzimidazole nitrate.
Claim 8
Dependent Claim
23 words
The process as claimed in claim 5, wherein said poly-(oxyethylene)glycol or derivative thereof has a molecular weight ranging from about 400 to 4000.
Claim 9
Dependent Claim
46 words
The process as claimed in claim 7, wherein said poly(oxyethylene)glycol or derivative thereof is a poly(oxyethylene)glycol methylphenyl ether, a poly(oxyethylene) alkyl ether, a poly(oxyethylene) nonylphenyl ether, a poly(oxyethylene) sorbitan ester, a poly(oxyethylene)-(oxypropylene) block copolymer, a poly(oxyethylene) alkyl ester, a poly(oxyethylene)-bis(pyridinium methane sulfonate) or a polyethoxy-ethyl-bis-sulfuric acid.
Claim 10
Dependent Claim
16 words
The process as claimed in claim 7, wherein said poly(oxyethylene)glycol or derivative thereof is poly(oxyethylene) glycol.
Claim 11
Dependent Claim
48 words
The process as claimed in claim 6, wherein said 1-phenyl-3-pyrazolidone, said poly(oxyethylene)glycol or derivative thereof, and said 6-nitrobenzimidazole nitrate are present at a level of from about 0.05 to 0.5 g, about 0.5 to 5 g and about 5 to 150 mg, respectively, per liter of developer solution.
References Cited (Backward Citations)
US2950970A
Cited
US3362820A
Cited
US3518085A
Cited
US3545971A
Cited
US3679423A
Cited
US3734735A
Cited
US3658525A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-05-11 | 1979-11-10 | 1980-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-11 | 1983-11-10 | 1984-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-11 | 1987-11-10 | 1988-05-11 | $7700.00 | Window Closed / Lapsed |