Patent US4564588A successfully refreshed from Google Patents.
US4564588A
Expired / Lapsed
US
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Silver halide photographic material for radiography
Assignee: Konica Minolta Inc
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Filing: 1985-02-06
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Granted: 1986-01-14
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Expires: 2005-02-06
Abstract
Abstract Silver halide photographic material for radiography comprising a transparent support having a hydrophilic colloid layer coated on each side thereof said layer comprising (a) photosensitive silver halide grains, (b) silver halide grains having surfaces covered with a solubility reducing agent and which, in the absence of said solubility reducing agent, are more soluble in a material capable of dissolving silver halide than said (a), said (b) having a sensitivity to light generally less than 1/10 that of said (a), and (c) physical development nuclei, wherein the molar ratio of (a) to (b), based on the silver content of each, is between 1:0.1 to 1:0.8 on each side of said support and the total silver content of (a) and (b) is from 1 to 8 g/m 2 .
Inventors
- 👤 Eiichi Sakamoto
- 👤 Mikio Kawasaki
- 👤 Kouji Ono
- 👤 Tomomi Yoshizawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:00
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/16; Y; Y10; Y10S; Y10S430/00; Y10S430/167; Y10S430/168
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
129 words
A silver halide photographic material for radiography comprising a transparent support having a hydrophilic colloid layer coated on each side thereof, said layer comprising (a) photosensitive silver halide grains, (b) silver halide grains whose surface is covered with a solubility reducing agent and which, in the absence of said solubility reducing agent, are more soluble in a material capable of dissolving silver halide than said (a), said (b) having a sensitivity to light generally less than 1/10th that of said (a), and (c) physical development nuclei, wherein the molar ratio of (a) to (b), based on the silver content of each, is between 1:0.1 to 1:0.8 on each side of said support and the total silver content of (a) and (b) is from 1 to 8 g/m 2 .
Claim 2
Dependent Claim
129 words
A silver halide photographic material for radiography comprising a transparent support having a hydrophilic colloid layer coated on each side thereof, said layer comprising (a) photosensitive silver halide grains, (b) silver halide grains whose surface is covered with a solubility reducing agent and which, in the absence of said solubility reducing agent, are more soluble in a material capable of dissolving silver halide than said (a), said (b) having a sensitivity to light generally less than 1/10th that of said (a), and (c) physical development nuclei, wherein the molar ratio of (a) to (b), based on the silver content of each, is between 1:0.1 to 1:0.8 on each side of said support and the total silver content of (a) and (b) is from 1 to 8 g/m 2 .
Claim 3
Dependent Claim
18 words
A silver halide photographic material according to claim 1, wherein the solubility reducing agent is a mercapto compound.
Claim 4
Dependent Claim
16 words
A silver halide photographic material according to claim 2, wherein the mercapto compound is a mercaptotetrazole.
Claim 5
Dependent Claim
39 words
A silver halide photographic material according to claim 1, wherein the photosensitive silver halide grains (a) are made of silver chloride, silver bromide, silver iodide, silver chlorobromide, silver iodobromide, silver chloroiodobromide or a mixture of two or more thereof.
Claim 6
Dependent Claim
34 words
A silver halide photographic material according to claim 1, wherein the photosensitive silver halide grains (b) are made of silver bromide or silver chloride which has not been chemically sensitized or a mixture thereof.
Claim 7
Dependent Claim
30 words
A silver halide photographic material according to claim 1, wherein the average diameter of the silver halide grains (b) is smaller than that of the photosensitive silver halide grains (a).
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) | 1989-01-13 | 1989-07-15 | 1990-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-13 | 1993-07-15 | 1994-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-13 | 1997-07-15 | 1998-01-14 | $7700.00 | Window Closed / Lapsed |