US4463082A
Expired / Lapsed
US
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Silver diffusion transfer film unit with noble metal compound as stabilizer
Assignee: Polaroid Corp
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Filing: 1983-04-19
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Granted: 1984-07-31
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Expires: 2003-04-19
Abstract
Abstract A silver diffusion transfer film unit comprising photosensitive silver halide, silver precipitating nuclei, a stabilizing compound of the formula XS(CH.sub.2).sub.n COOR wherein X is a noble metal below silver in the Electromotive Series of Elements, n is 1, 2 or 3 and R is an alkyl or substituted alkyl group; and a compound of the formula H.sub.x S.sub.y [(CH.sub.2).sub.b COOZ].sub.m wherein Z is hydrogen or alkyl, b is 1, 2 or 3, m=1 or 2, x=1 or 0 and y=1 or 2; when y=2, m=2 and x=0 and when y=1, m=1 and x=1.
Inventors
- 👤 John H. Ferguson
- 👤 Kenneth S. Norland
- 👤 Stephen R. Sofen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:22
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/24; G03C8/243
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
121 words
A photographic silver diffusion transfer film unit which comprises a photosensitive silver halide layer, silver precipitating nuclei layer and a protective layer intermediate said silver halide layer and said silver precipitating layer, said protective layer containing a stabilizing compound of the formula: XS(CH.sub.2).sub.n COOR wherein X is a noble metal below silver in the Electromotive Series of Elements, n is 1, 2 or 3 and R is an alkyl or substituted alkyl group; and a compound of the formula H.sub.x S.sub.y [(CH.sub.2).sub.b COOZ].sub.m wherein Z is hydrogen or alkyl, b is 1, 2 or 3; m is 1 or 2, x is 1 or 0, y is 1 or 2; when y=2, m=2 and x=0; and when y=1, m=1 and x=1.
Claim 2
Dependent Claim
121 words
A photographic silver diffusion transfer film unit which comprises a photosensitive silver halide layer, silver precipitating nuclei layer and a protective layer intermediate said silver halide layer and said silver precipitating layer, said protective layer containing a stabilizing compound of the formula: XS(CH.sub.2).sub.n COOR wherein X is a noble metal below silver in the Electromotive Series of Elements, n is 1, 2 or 3 and R is an alkyl or substituted alkyl group; and a compound of the formula H.sub.x S.sub.y [(CH.sub.2).sub.b COOZ].sub.m wherein Z is hydrogen or alkyl, b is 1, 2 or 3; m is 1 or 2, x is 1 or 0, y is 1 or 2; when y=2, m=2 and x=0; and when y=1, m=1 and x=1.
Claim 3
Dependent Claim
16 words
The film unit of claim 1 wherein R is a 1 to 4 carbon alkyl group.
Claim 4
Dependent Claim
13 words
The film unit of claim 2 wherein X is gold, palladium or platinum.
Claim 5
Dependent Claim
12 words
The film unit of claim 1 wherein said compound is dithiodiglycolic acid.
Claim 6
Dependent Claim
12 words
The film unit of claim 1 wherein said compound is methyl thioglycolate.
Claim 7
Dependent Claim
16 words
The film unit of claim 1 wherein said stabilizing compound is AuSCH 2 COOCH 3 .
Claim 8
Dependent Claim
10 words
The film unit of claim 1 which includes a support.
Claim 9
Dependent Claim
20 words
The film unit of claim 1 includes a stripping layer intermediate said protective layer and said photosensitive silver halide layer.
Claim 10
Dependent Claim
14 words
The film unit as defined in claim 1 which includes an additive color screen.
Claim 11
Dependent Claim
147 words
A photographic process which comprises the steps of: (a) exposing a film unit which comprises a support carrying, in order, a layer comprising silver precipitating nuclei; a protective layer carrying a stabilizing compound of the formula XS(CH.sub.2).sub.n COOR wherein X is a noble metal below silver in the Electromative Series of Elements, n is 1, 2 or 3 and R is an alkyl or substituted alkyl group and a compound of the formula H.sub.x S.sub.y [(CH.sub.2).sub.b COOZ].sub.m wherein Z is hydrogen or alkyl, b is 1, 2 or 3, m=1 or 2, x=1 or 0 and y=1 or 2, when y=2, m=2 and x=0 and when y=1, m=1 and x=1; a release layer and a photosensitive silver halide emulsion layer; (b) contacting said exposed film unit with a liquid processing composition; and (c) detaching said photosensitive silver halide emulsion layer from the remainder of the film unit.
Claim 12
Dependent Claim
147 words
A photographic process which comprises the steps of: (a) exposing a film unit which comprises a support carrying, in order, a layer comprising silver precipitating nuclei; a protective layer carrying a stabilizing compound of the formula XS(CH.sub.2).sub.n COOR wherein X is a noble metal below silver in the Electromative Series of Elements, n is 1, 2 or 3 and R is an alkyl or substituted alkyl group and a compound of the formula H.sub.x S.sub.y [(CH.sub.2).sub.b COOZ].sub.m wherein Z is hydrogen or alkyl, b is 1, 2 or 3, m=1 or 2, x=1 or 0 and y=1 or 2, when y=2, m=2 and x=0 and when y=1, m=1 and x=1; a release layer and a photosensitive silver halide emulsion layer; (b) contacting said exposed film unit with a liquid processing composition; and (c) detaching said photosensitive silver halide emulsion layer from the remainder of the film unit.
Claim 13
Dependent Claim
12 words
The process of claim 10 wherein X is gold, palladium or platinum.
Claim 14
Dependent Claim
11 words
The process of claim 10 wherein said compound is dithiodiglycolic acid.
Claim 15
Dependent Claim
10 words
The process of claim 10 wherein said compound is methylthioglycolate.
Claim 16
Dependent Claim
15 words
The process of claim 10 wherein said stabilizing compound is AuSCH 2 COOCH 3 .
Claim 17
Dependent Claim
10 words
The process of claim 10 wherein said support is transparent.
Claim 18
Dependent Claim
17 words
The process of claim 10 wherein said film unit is an additive color diffusion transfer film unit.
Claim 19
Dependent Claim
122 words
A silver diffusion transfer film unit which comprises a support carrying, in order, a layer comprising silver precipitating nuclei; a protective layer; a release layer; and a photosensitive silver halide emulsion layer; wherein said protective layer contains a stabilizing compound of the formula XS(CH.sub.2).sub.n COOR wherein x is a noble metal below silver in the Electromotive Series of Elements, n is 1, 2 or 3 and R is an alkyl or substituted alkyl group; and a compound of the formula H.sub.x S.sub.y [(CH.sub.2).sub.b COOZ].sub.m wherein Z is hydrogen or alkyl, b is 1, 2 or 3; m is 1 or 2, x is 1 or 0, y is 1 or 2; when y=2, m=2 and x=0; and when y=1, m=1 and x=1.
Claim 20
Dependent Claim
122 words
A silver diffusion transfer film unit which comprises a support carrying, in order, a layer comprising silver precipitating nuclei; a protective layer; a release layer; and a photosensitive silver halide emulsion layer; wherein said protective layer contains a stabilizing compound of the formula XS(CH.sub.2).sub.n COOR wherein x is a noble metal below silver in the Electromotive Series of Elements, n is 1, 2 or 3 and R is an alkyl or substituted alkyl group; and a compound of the formula H.sub.x S.sub.y [(CH.sub.2).sub.b COOZ].sub.m wherein Z is hydrogen or alkyl, b is 1, 2 or 3; m is 1 or 2, x is 1 or 0, y is 1 or 2; when y=2, m=2 and x=0; and when y=1, m=1 and x=1.
Claim 21
Dependent Claim
20 words
The film unit of claim 17 wherein said stabilizing compound is gold methyl thioglycolate and said compound is dithiodiglycolic acid.
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) | 1987-07-31 | 1988-01-30 | 1988-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-31 | 1992-01-30 | 1992-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-31 | 1996-01-30 | 1996-07-31 | $7700.00 | Window Closed / Lapsed |