US4409322A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silver halide photosensitive material
Assignee: Konica Minolta Inc
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Filing: 1981-12-10
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Granted: 1983-10-11
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Expires: 2001-12-10
Abstract
Abstract A silver halide photographic material comprising a silver halide emulsion layer and a protective layer on one side of the support and a non-photosensitive back layer on the other side of the support. The amount of silver halide in the emulsion layer is not more than 30 mg/dm2. A matting agent in indeterminate form is included in the protective layer and a substantially spherical matting agent is included in the back layer.
Inventors
- 👤 Atsuo Ezaki
- 👤 Takeshi Murakami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:23
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/95; Y; Y10; Y10S; Y10S430/00; Y10S430/151
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
161 words
A silver halide photographic material comprising a support, a silver halide emulsion layer and a protective layer on one side of said support, and a non-photosensitive back layer on the other side of said support wherein silver halide is present in said silver halide emulsion layer in an amount not greater than 30 mg/dm 2 based on the amount of silver, and a first matting agent in said protective layer and a substantially spherical matting agent in said back layer, wherein said first matting agent comprising a fine powder of an inorganic compound selected from the group consisting of barium sulphate, desensitized silver halide, zinc dust, manganese colloid, titanium dioxide, silicon dioxide, magnesium oxide and calcium carbonate or a an organic high molecular weight compound selected from the group consisting of polytetrafluoroethylene, cellulose acetate, polystyrene, polymethylstyrene, polymethylmethacrylate, polypropylmethacrylate, polymethylacrylate, butyl polyacrylate and polyethylenecarbonate, and wherein said spherical matting agent is an organic high molecular weight compound obtained by suspension polymerization thereof.
Claim 2
Dependent Claim
161 words
A silver halide photographic material comprising a support, a silver halide emulsion layer and a protective layer on one side of said support, and a non-photosensitive back layer on the other side of said support wherein silver halide is present in said silver halide emulsion layer in an amount not greater than 30 mg/dm 2 based on the amount of silver, and a first matting agent in said protective layer and a substantially spherical matting agent in said back layer, wherein said first matting agent comprising a fine powder of an inorganic compound selected from the group consisting of barium sulphate, desensitized silver halide, zinc dust, manganese colloid, titanium dioxide, silicon dioxide, magnesium oxide and calcium carbonate or a an organic high molecular weight compound selected from the group consisting of polytetrafluoroethylene, cellulose acetate, polystyrene, polymethylstyrene, polymethylmethacrylate, polypropylmethacrylate, polymethylacrylate, butyl polyacrylate and polyethylenecarbonate, and wherein said spherical matting agent is an organic high molecular weight compound obtained by suspension polymerization thereof.
Claim 3
Dependent Claim
30 words
A silver halide photographic material according to claim 1, wherein the matting agent in an indeterminate form has neither a plane of symmetry thereof or a point of symmetry thereof.
Claim 4
Dependent Claim
34 words
A silver halide photographic material according to claim 1 or 2, wherein the amount added of the matting agent in an indetermnate form is 0.1-10% by weight to the amount of the protective layer.
Claim 5
Dependent Claim
27 words
A silver halide photographic material according to claim 1 or 2, wherein the matting agent in an indeterminate form has an average grain diameter of 0.1-20 μm.
Claim 6
Dependent Claim
23 words
A silver halide photographic material according to claim 1, wherein the substantially sherical matting agent has an average grain diameter of 0.1-20 μm.
Claim 7
Dependent Claim
32 words
A silver halide photographic material according to claim 1 or 5, wherein the amount added of the substantially spherical matting agent is 0.1-10% by weight to the amount of the back layer.
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) | 1986-10-10 | 1987-04-11 | 1987-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-10 | 1991-04-11 | 1991-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-10 | 1995-04-11 | 1995-10-11 | $7700.00 | Window Closed / Lapsed |