Patent US1868247A successfully refreshed from Google Patents.
EP0355535A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Silver halide photographic emulsions
Assignee: Fujifilm Holdings Corp
•
Filing: 1989-08-04
•
Granted: —
•
Expires: 2009-08-04
Abstract
Abstract A silver halide photographic emulsion having a high sensitivity is disclosed, which comprises a dispersion medium and silver halide grains, wherein said silver halide grains contain at least one phase composed of two or more kinds of different silver halides and the phase contains at least 10 mol% silver chloride with microscopically homogeneous distribution.
Inventors
- 👤 Shigeharu Urabe
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 17:29
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/0051; G03C1/06; G03C1/08; G03C1/10; G03C1/12; G03C1/14; G03C1/18
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
47 words
A silver halide photographic emulsion comprising a dispersion medium and silver halide grains, wherein said silver halide grains contain at least one phase composed of two or more kinds of different silver halides and the phase contains at least 10 mol% silver chloride with microscopically homogeneous distribution.
Claim 2
Dependent Claim
47 words
A silver halide photographic emulsion comprising a dispersion medium and silver halide grains, wherein said silver halide grains contain at least one phase composed of two or more kinds of different silver halides and the phase contains at least 10 mol% silver chloride with microscopically homogeneous distribution.
Claim 3
Dependent Claim
43 words
The silver halide photographic emulsion of claim 1, wherein said silver halide grains include tabular grains accounting for at least 50% of the total projected area of said silver halide grains, the mean aspect ratio of the tabular grains being at least 3.
Claim 4
Dependent Claim
20 words
The silver halide photographic emulsion of claim 1, wherein said phase contains from 10 to 90 mol% of silver chloride.
Claim 5
Dependent Claim
20 words
The silver halide photographic emulsion of claim 3, wherein said phase contains from 20 to 80 mol% of silver chloride.
Claim 6
Dependent Claim
27 words
The silver halide photographic emulsion of claim 1, wherein said phase is contained in the proportion of from 5 to 99 mol% of the silver halide grain.
Claim 7
Dependent Claim
27 words
The silver halide photographic emulsion of claim 5, wherein said phase is contained in the proportion of from 20 to 99 mol% of the silver halide grain.
Claim 8
Dependent Claim
32 words
The silver halide photographic emulsion of claim 1, wherein said silver halide grains are contained in the proportion of at least 40% based on the total silver halide grains in the emulsion.
Claim 9
Dependent Claim
17 words
The silver halide photographic emulsion of claim 1, wherein said phase is silver chlorobromide or silver iodochlorobromide.
Claim 10
Dependent Claim
58 words
The silver halide photographic emulsion of claim 1, wherein said silver halide grain is a tabular grain having at most 2 lines showing the microscopic silver chloride distribution within an interval of 0.2 µm in the direction of perpendiculary crossing the line in the transmitted image of the grain obtained by using a cooling type transmission election microscopy.
Claim 11
Dependent Claim
26 words
The silver halide photographic emulsion of claim 9, wherein said silver halide grain is a tabular grain having no line showing the microscope silver chloride distribution.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.