Patent US4450395A successfully refreshed from Google Patents.
US4592991A
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Silver halide photographic printing paper
Assignee: Fujifilm Holdings Corp
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Filing: 1984-12-20
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Granted: 1986-06-03
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Expires: 2004-12-20
Abstract
Abstract A silver halide photographic printing paper is described, comprising a support and a photographic layer containing a silver halide developing agent, wherein a dispersion of an oil-soluble brightening agent in a high boiling point organic solvent having a specific inductive capacity of 7.5 or less is contained in the photographic layer. This printing paper yields a background of high whiteness even when processed under rapid processing conditions.
Inventors
- 👤 Tetsuo Yoshida
- 👤 Tadayoshi Kokubo
- 👤 Keiichi Adachi
- 👤 Tadashi Ikeda
- 👤 Hidetoshi Kobayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:06
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/815; Y; Y10; Y10S; Y10S430/00; Y10S430/134
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
57 words
A silver halide photographic printing paper comprising a support having on the support a photographic layer, containing a photographic emulsions and a silver halide developing agent, wherein an emulsified dispersion of an oil-soluble brightening agent in a high boiling point organic solvent having a specific inductive capacity of 7.5 or less is contained in the photographic layer.
Claim 2
Dependent Claim
57 words
A silver halide photographic printing paper comprising a support having on the support a photographic layer, containing a photographic emulsions and a silver halide developing agent, wherein an emulsified dispersion of an oil-soluble brightening agent in a high boiling point organic solvent having a specific inductive capacity of 7.5 or less is contained in the photographic layer.
Claim 3
Dependent Claim
27 words
A silver halide photographic printing paper as claimed in claim 1, wherein the high boiling point organic solvent has a specific inductive capacity of 6.0 or less.
Claim 4
Dependent Claim
20 words
A silver halide photographic printing paper as claimed in claim 1, wherein the specific inductive capacity is 2.0 or more.
Claim 5
Dependent Claim
37 words
A silver halide photographic printing paper as claimed in claim 1, wherein the high boiling point organic solvent is selected from the group consisting of carboxylic acid esters, phosphoric acid esters, carboxylic acid amides, and substituted hydrocarbons.
Claim 6
Dependent Claim
36 words
A silver halide photographic printing paper as claimed in claim 2, wherein the high boiling point organic solvent is selected from group consisting of carboxylic acid esters, phoshoric acid esters, carboxylic acid amides, and substituted hydrocarbons.
Claim 7
Dependent Claim
27 words
A silver halide photographic printing paper as claimed in claim 1, wherein the high boiling point organic solvent has a boiling point of 150° C. or higher.
Claim 8
Dependent Claim
27 words
A silver halide photographic printing paper as claimed in claim 6, wherein the high boiling point organic solvent has a boiling point of 200° C. or higher.
Claim 9
Dependent Claim
26 words
A silver halide photographic printing paper as claimed in claim 1, wherein the high boiling point organic solvent is selected from the group consisting of ##STR17##
Claim 10
Dependent Claim
28 words
A silver halide photographic printing paper as claimed in claim 1, wherein the brightening agent is contained in an amount of from 1 to 200 mg/m 2 .
Claim 11
Dependent Claim
28 words
A silver halide photographic printing paper as claimed in claim 9, wherein the brightening agent is contained in an amount of from 5 to 50 mg/m 2 .
Claim 12
Dependent Claim
31 words
A silver halide photographic printing paper as claimed in claim 1, wherein the weight ratio of the high boiling point organic solvent to the brightening agent is from 100/0.1 to 100/50.
Claim 13
Dependent Claim
29 words
A silver halide photographic printing paper as claimed in claim 1, wherein the silver halide developing agent added is contained in an amount of 5 g/m 2 or less.
Claim 14
Dependent Claim
30 words
A silver halide photographic printing paper as claimed in claim 12, wherein the silver halide developing agent is contained in an amount of from 1 to 0.01 g/m 2 .
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-06-02 | 1989-12-02 | 1990-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-02 | 1993-12-02 | 1994-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-02 | 1997-12-02 | 1998-06-03 | $7700.00 | Window Closed / Lapsed |