Patent US4004928A successfully refreshed from Google Patents.
US4004928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color photographic material
Assignee: Mitsubishi Paper Mills Ltd
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Filing: 1975-08-25
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Granted: 1977-01-25
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Expires: 1995-08-25
Abstract
Abstract Use of the compounds represented by the general formula; <IMAGE> (wherein R represents an alkyl group of 1 - 8 carbon atoms) as a permanent solvent for color coupler or ultraviolet ray absorber in color photographic materials.
Inventors
- 👤 Sadayuki Miyazawa
- 👤 Yoshikazu Takaya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:05
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/388; G03C7/3885; G03C1/00; G03C1/76; G03C1/815
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
94 words
A color photographic material having a silver halide emulsion layer and a filter layer, there being present either one or both of (1) a non-diffusing oil-soluble color coupler in said silver halide emulsion layer; or (2) an ultraviolet ray absorber in said layer on a support, there being present in at least one of said silver halide emulsion layer and said layer at least one compound of the formula: ##STR3##wherein R is an alkyl group of 1 - 8 carbon atoms as a permanent solvent for said color coupler or said ultraviolet ray absorber.
Claim 2
Dependent Claim
94 words
A color photographic material having a silver halide emulsion layer and a filter layer, there being present either one or both of (1) a non-diffusing oil-soluble color coupler in said silver halide emulsion layer; or (2) an ultraviolet ray absorber in said layer on a support, there being present in at least one of said silver halide emulsion layer and said layer at least one compound of the formula: ##STR3##wherein R is an alkyl group of 1 - 8 carbon atoms as a permanent solvent for said color coupler or said ultraviolet ray absorber.
Claim 3
Dependent Claim
25 words
A color photographic material according to claim 1, wherein the permanent solvent containing a color coupler or ultraviolet ray absorber is dispersed in oil-in-water state.
Claim 4
Dependent Claim
33 words
A color photographic material according to claim 1, wherein the color coupler is selected from ketomethylene yellow dye forming coupler, 5-pyrazolone magenta dye forming coupler and phenolic or α-naphtholic cyan dye forming coupler.
Claim 5
Dependent Claim
17 words
A color photographic material according to claim 1, wherein the ultraviolet ray absorber is a 2-aryl-benzotriazole derivative.
Claim 6
Dependent Claim
31 words
A color photographic material according to claim 3, wherein the amount of the permanent solvent is 0.3 - 3 parts by weight per 1 part by weight of the color coupler.
Claim 7
Dependent Claim
31 words
A color photographic material according to claim 4, wherein the amount of the permanent solvent is 0.3 - 3 parts by weight per 1 part by weight the ultraviolet ray absorber.
Claim 8
Dependent Claim
19 words
A color photographic material according to claim 1, wherein the permanent solvent is dipentaerythritol hexaoctanoate ester or dipentaerythritolhexabutyrate ester.
Claim 9
Dependent Claim
23 words
A color photographic material according to claim 1, wherein the color coupler and the permanent solvent are present in silver halide emulsion layers.
Claim 10
Dependent Claim
27 words
A color photographic material according to claim 1, including protective layers and wherein the ultraviolet ray absorber and the permanent solvent are present in said protective layers.
References Cited (Backward Citations)
US3676147A
Cited
US3779765A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-01-25 | 1980-07-26 | 1981-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-25 | 1984-07-26 | 1985-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-25 | 1988-07-26 | 1989-01-25 | $7700.00 | Window Closed / Lapsed |