US5028520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silver halide photographic material for X-ray use
Assignee: Fujifilm Holdings Corp
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Filing: 1989-05-26
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Granted: 1991-07-02
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Expires: 2009-05-26
Abstract
Abstract A silver halide photographic material for X-ray use comprising a support having provided thereon at least one hydrophilic colloid layer, at least one of which is a silver halide emulsion layer, wherein the silver halide emulsion layer contains tabular silver halide grains having an aspect ratio of 3 or more, and at least one of the silver halide emulsion layers or other hydrophilic colloid layers of the photographic material contains a polyhydroxy-substituted benzene compound in an amount of from 3×10 -2 mol to less than 5×10 -1 mol per mol of silver.
Inventors
- 👤 Tadashi Ito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:01
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/10; G03C5/00; G03C5/16; G03C5/17; G03C1/0051; G03C1/12; G03C1/14; G03C1/18; G03C1/76; G03C1/825; G03C1/83; G03C1/832; G03C2001/0055; G03C2200/00; G03C2200/23; Y; Y10; Y10S; Y10S430/00; Y10S430/151; Y10S430/167
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
92 words
A silver halide photographic material for X-ray use comprising a support having provided thereon at least one hydrophilic colloid layer, at least one of which is a silver halide emulsion layer, wherein said silver halide emulsion layer contains tabular silver halide grains having an aspect ratio of 3 or more, and at least one of said silver halide emulsion layers or other hydrophilic colloid layers of said photographic material contains a polyhydroxy-substituted benzene compound in an amount of from 3×10 -2 mol to less than 5×10 -1 mol per mole of silver.
Claim 2
Dependent Claim
92 words
A silver halide photographic material for X-ray use comprising a support having provided thereon at least one hydrophilic colloid layer, at least one of which is a silver halide emulsion layer, wherein said silver halide emulsion layer contains tabular silver halide grains having an aspect ratio of 3 or more, and at least one of said silver halide emulsion layers or other hydrophilic colloid layers of said photographic material contains a polyhydroxy-substituted benzene compound in an amount of from 3×10 -2 mol to less than 5×10 -1 mol per mole of silver.
Claim 3
Dependent Claim
27 words
A silver halide photographic material as in claim 1, wherein said polyhydroxy-substituted benzene compound is selected from the group consisting of ##STR23## wherein X represents a substituent.
Claim 4
Dependent Claim
54 words
A silver halide photographic material as in claim 2, wherein the substituent represented by X is selected from the group consisting of: --H, --OH, ##STR24## --Cl, --Br, --COOH, --CH 2 CH 2 COOH, (CH 3 ) 2 CH--, --CH 3 , (CH 3 ) 3 C--, --OCH 3 , --CHO, and --SO 3 K.
Claim 5
Dependent Claim
22 words
A silver halide photographic material as in claim 2, wherein said polyhydroxy-substituted benzene compound is selected from 1,4-dihydroxy-benzene derivatives and 1,3-dihydroxy benzene.
Claim 6
Dependent Claim
30 words
A silver halide photographic material as in claim 1, wherein the amount of said polyhydroxy-substituted benzene compound is from 5×10 -2 mol to 1×10 -1 mol per mol of silver.
Claim 7
Dependent Claim
52 words
A silver halide photographic material as in claim 1, wherein said silver halide emulsion layer containing tabular silver halide grains having an aspect ratio of 3 or more comprises silver halide emulsion grains having 0.3 to 2.0 μm in diameter of the projected surface area and 0.05 to 0.3 μm in thickness.
Claim 8
Dependent Claim
52 words
A silver halide photographic material as in claim 1, wherein said silver halide emulsion layer containing tabular silver halide grains having an aspect ratio of 3 or more comprises silver halide emulsion grains having 0.5 to 1.2 μm in diameter of the projected surface area and 0.1 to 0.25 μm in thickness.
Claim 9
Dependent Claim
43 words
A silver halide photographic material as in claim 1, wherein the proportion of said tabular silver halide grains having an aspect ratio of 3 or more in said silver halide emulsion layer is 50% or more of the total silver halide grain area.
Claim 10
Dependent Claim
43 words
A silver halide photographic material as in claim 1, wherein the proportion of said tabular silver halide grains having an aspect ratio of 3 or more in said silver halide emulsion layer is 70% or more of the total silver halide grain area.
Claim 11
Dependent Claim
43 words
A silver halide photographic material as in claim 1, wherein the proportion of said tabular silver halide grains having an aspect ratio of 3 or more in said silver halide emulsion layer is 90% or more of the total silver halide grain area.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-07-01 | 1994-12-31 | 1995-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-01 | 1998-12-31 | 1999-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-01 | 2002-12-31 | 2003-07-02 | $7700.00 | Window Closed / Lapsed |