Patent US4255515A successfully refreshed from Google Patents.
US4255515A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic films
Assignee: Konica Minolta Inc
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Filing: 1978-11-13
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Granted: 1981-03-10
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Expires: 1998-11-13
Abstract
Abstract A photographic film which comprises (A) a support, having two sides, (B) at least one light-sensitive emulsion layer on one side of said support (A), and, (C) at least one layer containing a compound represented by formula [I]and a hydrophobic polymer (first layer) and at least one layer containing an antistatic agent (second layer), said first and second layers being placed on the other side of said support (A) and said first layer being placed closer to said support (A) than said second layer: ##STR1## wherein, R 1 represents a carboxylic acid residue having from 12 to 24 carbon atoms and R 2 , R 3 and R 4 represent independently hydrogen atoms or organic acid residues having from 1 to 24 carbon atoms.
Inventors
- 👤 Toshiaki Shibue
- 👤 Koichi Nagayasu
- 👤 Masayoshi Mayama
- 👤 Masao Ishihara
- 👤 Naoto Abe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:25
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/85; G03C1/7614; Y; Y10; Y10S; Y10S430/00; Y10S430/162
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
127 words
A photographic film which comprises (A) a support having two sides, (B) at least one light-sensitive silver halide emulsion layer on one side of said support (A), and, (C), at least one layer containing a compound represented by formula I and a hydrophobic polymer (first layer) and at least one layer containing an antistatic agent (second layer), said first and second layers being placed on the other side of said support (A) and said first layer being placed closer to said support (A) than said second layer: ##STR8## wherein, R 1 represents a carboxylic acid residue having from 12 to 24 carbon atoms and R 2 , R 3 and R 4 represent independently hydrogen atoms or organic acid residues having from 1 to 24 carbon atoms.
Claim 2
Dependent Claim
127 words
A photographic film which comprises (A) a support having two sides, (B) at least one light-sensitive silver halide emulsion layer on one side of said support (A), and, (C), at least one layer containing a compound represented by formula I and a hydrophobic polymer (first layer) and at least one layer containing an antistatic agent (second layer), said first and second layers being placed on the other side of said support (A) and said first layer being placed closer to said support (A) than said second layer: ##STR8## wherein, R 1 represents a carboxylic acid residue having from 12 to 24 carbon atoms and R 2 , R 3 and R 4 represent independently hydrogen atoms or organic acid residues having from 1 to 24 carbon atoms.
Claim 3
Dependent Claim
30 words
The photographic film as claimed in claim 1, wherein R 1 , R 2 and R 3 are straight chain carboxylic acid residues having from 12 to 24 carbon atoms.
Claim 4
Dependent Claim
25 words
The photographic film as claimed in claim 2, wherein R 4 is a straight chain carboxylic acid residue having from 12 to 24 carbon atoms.
Claim 5
Dependent Claim
23 words
The photographic film as claimed in claim 1, in which the compound having formula (I) is selected from the group consisting of: ##STR9##
Claim 6
Dependent Claim
18 words
The photographic film as claimed in claim 1 or 2, wherein the hydrophobic polymer is a cellulose derivative.
Claim 7
Dependent Claim
17 words
The photographic film as claimed in claim 1 or 4, wherein the hydrophobic polymer is cellulose diacetate.
Claim 8
Dependent Claim
17 words
The photographic film as claimed in claim 1, wherein the antistatic agent is a high molecular electrolyte.
Claim 9
Dependent Claim
29 words
The photographic film as claimed in claim 1 or 4, wherein the second layer is formed by using a coating solvent which dissolves substantially none of the first layer.
Claim 10
Dependent Claim
25 words
The photographic film as claimed in claim 6, wherein R 4 is a straight chain carboxylic acid residue having from 12 to 24 carbon atoms.
Claim 11
Dependent Claim
25 words
The photographic film as claimed in claim 8, wherein R 4 is a straight chain carboxylic acid residue having from 12 to 24 carbon atoms.
Claim 12
Dependent Claim
17 words
The photographic film as claimed in claim 9, wherein the antistatic agent is a high molecular electrolyte.
Claim 13
Dependent Claim
17 words
The photographic film as claimed in claim 10, wherein the antistatic agent is a high molecular electrolyte.
Claim 14
Dependent Claim
15 words
The photographic film as claimed in claim 10, wherein the hydrophobic polymer is cellulose diacetate.
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) | 1984-03-09 | 1984-09-08 | 1985-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-09 | 1988-09-08 | 1989-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-09 | 1992-09-08 | 1993-03-10 | $7700.00 | Window Closed / Lapsed |