US4069053A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic films
Assignee: Konica Minolta Inc
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Filing: 1977-03-31
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Granted: 1978-01-17
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Expires: 1997-03-31
Abstract
Abstract A photographic film comprising a plastic support having first and second layers therein in that order, the first layer comprising a cellulose acetate together with a matting agent composed mainly of silicon dioxide of less than 1 μ in particle size, the second layer comprising a phosphoric acid ester, or an amine salt thereof of a C 8 to C 22 -higher alkyl alcohol. A light-sensitive emulsion layer is carried on the other side of the support.
Inventors
- 👤 Masayoshi Mayama
- 👤 Tohru Kobayashi
- 👤 Masahide Tamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:34
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/95; G03C1/85; G03C1/856; Y; Y10; Y10S; Y10S430/00; Y10S430/151
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
78 words
In a photographic film having a plastic support; a first layer comprising cellulose acetate and a matting agent comprising silicon dioxide less than 1μ in particle size; a second layer comprising a phosphoric acid ester of a C 8 to C 22 -higher alkyl alcohol, or an amine salt thereof, said first and second layers being carried in that order on one side of the support; and a light-sensitive emulsion layer on the other side of the support.
Claim 2
Dependent Claim
78 words
In a photographic film having a plastic support; a first layer comprising cellulose acetate and a matting agent comprising silicon dioxide less than 1μ in particle size; a second layer comprising a phosphoric acid ester of a C 8 to C 22 -higher alkyl alcohol, or an amine salt thereof, said first and second layers being carried in that order on one side of the support; and a light-sensitive emulsion layer on the other side of the support.
Claim 3
Dependent Claim
27 words
A photographic film as claimed in claim 1, wherein said matting agent further comprises up to 25% of at least one of aluminum oxide and magnesium oxide.
Claim 4
Dependent Claim
19 words
A photographic film as claimed in claim 2, wherein said silicon dioxide is modified by treatment with methyl chloride.
Claim 5
Dependent Claim
26 words
A photographic film as claimed in claim 1, wherein said first layer further comprises at least one of a plasticizer, a colorant or a defoaming agent.
Claim 6
Dependent Claim
26 words
A photographic film as claimed in claim 1, wherein said second layer further comprises at least one of a plasticizer, a colorant or a defoaming agent.
Claim 7
Dependent Claim
35 words
A photographic film as claimed in claim 1, wherein said emulsion layer is a light-sensitive gelatino-silver halide photographic emulsion layer and is coated on a sub layer applied to the other side of the support.
Claim 8
Dependent Claim
21 words
A photographic film as claimed in claim 1, wherein the plastic support is a film of cellulose triacetate or polyethylene terephthalate.
Claim 9
Dependent Claim
136 words
A photographic film which is stain-resistant to developing solutions containing an organic solvent, said film comprising a plastic support of cellulose triacetate or polyethylene terephthalate; a first layer comprising cellulose acetate in an amount of 10-500 mg. per square meter of the layer, and a matting agent of silicon dioxide less than 1μ in particle size in an amount of 0.1 to 0.5 part per part of cellulose acetate; a second layer comprising a phosphoric acid ester of a C 8 to C 22 -higher alkyl alcohol, or an amine salt thereof, in an amount of 6-20 mg. per square meter of said second layer, said first and second layers being carried in that order on one side of said support; and a light-sensitive gelatino-silver halide photographic emulsion layer on the other side of said support.
Claim 10
Dependent Claim
136 words
A photographic film which is stain-resistant to developing solutions containing an organic solvent, said film comprising a plastic support of cellulose triacetate or polyethylene terephthalate; a first layer comprising cellulose acetate in an amount of 10-500 mg. per square meter of the layer, and a matting agent of silicon dioxide less than 1μ in particle size in an amount of 0.1 to 0.5 part per part of cellulose acetate; a second layer comprising a phosphoric acid ester of a C 8 to C 22 -higher alkyl alcohol, or an amine salt thereof, in an amount of 6-20 mg. per square meter of said second layer, said first and second layers being carried in that order on one side of said support; and a light-sensitive gelatino-silver halide photographic emulsion layer on the other side of said support.
Claim 11
Independent Claim
144 words
A method of producing a photographic film which is stain-resistant to developing solutions containing an organic solvent, said method comprising forming a plastic support of cellulose triacetate or polyethylene terephthalate, depositing a first layer on one side of the support, said first layer comprising cellulose acetate in an amount of 10-500 mg. per square meter of the layer, and a matting agent of silicon dioxide less than 1μ in particle size in an amount of 0.1 to 0.5 part per part of cellulose acetate, depositing a second layer on the first layer, said second layer comprising a phosphoric acid ester of a C 8 to C 22 -higher alkyl alcohol, or an amine salt thereof, in an amount of 6-20 mg. per square meter of said second layer, and depositing a light-sensitive gelatino-silver halide photographic emulsion layer on the other side of said support.
Claim 12
Independent Claim
144 words
A method of producing a photographic film which is stain-resistant to developing solutions containing an organic solvent, said method comprising forming a plastic support of cellulose triacetate or polyethylene terephthalate, depositing a first layer on one side of the support, said first layer comprising cellulose acetate in an amount of 10-500 mg. per square meter of the layer, and a matting agent of silicon dioxide less than 1μ in particle size in an amount of 0.1 to 0.5 part per part of cellulose acetate, depositing a second layer on the first layer, said second layer comprising a phosphoric acid ester of a C 8 to C 22 -higher alkyl alcohol, or an amine salt thereof, in an amount of 6-20 mg. per square meter of said second layer, and depositing a light-sensitive gelatino-silver halide photographic emulsion layer on the other side of said support.
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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) | 1981-01-16 | 1981-07-18 | 1982-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-16 | 1985-07-18 | 1986-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-16 | 1989-07-18 | 1990-01-17 | $7700.00 | Window Closed / Lapsed |