Patent US4069053A successfully refreshed from Google Patents.
US4069053A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic films
Assignee: Konica Minolta Inc
•
Filing: 1977-03-31
•
Granted: 1978-01-17
•
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 18:53
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.
References Cited (Backward Citations)
US2801191A
Cited
US3053662A
Cited
US3159487A
Cited
US3514291A
Cited
US3525621A
Cited
US3658573A
Cited
US3630740A
Cited
US3635714A
Cited
US3656950A
Cited
US3775124A
Cited
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 |