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US3790384A Expired / Lapsed US ⏱️ 0.0 years remaining

Light-sensitive color photographic elements with improved image quality

Assignee: Fujifilm Holdings Corp
•
Filing: 1971-10-26
•
Granted: 1974-02-05
•
Expires: 1991-10-26
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Abstract

Abstract A multi-layer color photographic element comprising a support having a plurality of silver halide emulsion layers, at least one layer being a red-sensitive silver halide emulsion layer, containing a cyan-forming coupler, such as phenol derivatives and Alpha -naphthol derivatives which have an iodine or a bromine atom at the ''''para'''' position to the hydroxyl group. Greensensitive emulsion layers and blue-sensitive emulsion layers are generally used in combination with said red-sensitive layer. The order of application of said layers is of no importance, as long as the red-sensitive emulsion layer is separated from different emulsion layers by an intermediate layer containing silver halide grains of reduced photo-sensitivity. Specific examples of the cyan-forming coupler and acceptable silver halide materials are defined in the disclosure.

Inventors

  • 👤 Y Oishi
  • 👤 Y Yoshida
  • 👤 K Sano

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-06 19:26
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/3029; G03C7/32; G03C7/34; G03C2200/00; G03C2200/35

Claims Analysis

Total Claims: 8
Claim 1
Independent Claim 21 words
A color photographic element as claimed in claim 1, wherein said cyan-forming coupler is selected from compounds having the general formula:
Claim 2
Dependent Claim 21 words
A color photographic element as claimed in claim 1, wherein said cyan-forming coupler is selected from compounds having the general formula:
Claim 3
Dependent Claim 36 words
A color photographic element as claimed in claim 1, wherein said silver halide which is incorporated in the intermediate layer is selected from the group consisting of silver chloride, silver bromide, silver chlorobromide, and silver iodobromide.
Claim 4
Dependent Claim 39 words
A color photographic element as claimed in claim 1 wherein the amount of said silver halide in said intermediate layer varies from 1 X 10 6 to 1 X 10 4 mole per 100 cm2 of said photographic element.
Claim 5
Dependent Claim 26 words
A color photographic element as claimed in claim 1 wherein said silver halide grains in said intermediate layer have a size of less than 0.5 micron.
Claim 6
Dependent Claim 32 words
A color photographic element as claimed in claim 1 comprising a support having coated thereon, successively, said red-sensitive emulsion layer, said intermediate layer, said green-sensitive emulsion layer and said blue-sensitive emulsion layer.
Claim 7
Dependent Claim 35 words
A color photographic element as claimed in claim 1 comprising a support having coated thereon, successively, said blue-sensitive emulsion layer, said intermediate layer, said red-sensitive emulsion layer, said intermediate layer and said green-sensitive emulsion layer.
Claim 8
Dependent Claim 20 words
A color photographic element as claimed in claim 2 wherein said cyan-forming coupler is selected from the group consisting of:

References Cited (Backward Citations)

US3152907A Cited
US3364022A Cited
US3488193A Cited
US3591383A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1977-02-04 1977-08-06 1978-02-05 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-02-04 1981-08-06 1982-02-05 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-02-04 1985-08-06 1986-02-05 $7700.00 Window Closed / Lapsed

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