US4186013A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silver diffusion transfer receiving layer comprising HEC and gelatin
Assignee: Polaroid Corp
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Filing: 1978-04-04
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Granted: 1980-01-29
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Expires: 1998-04-04
Abstract
Abstract A receiving element for use in a photographic silver diffusion transfer process which comprises a transparent support carrying a layer comprising gelatin, hydroxyethyl cellulose and noble metal silver-precipitating nuclei; wherein said nuclei are present in a level of from about 0.1-0.4 mgs/ft 2 , gelatin is present at a level of from about 0.05 to 1.5 mgs/ft 2 and hydroxyethyl cellulose is present at a level of about 0.1 to 7 mgs/ft 2 . Preferably, the noble metal is palladium. The receiving element is particularly useful in an additive color diffusion transfer process.
Inventors
- 👤 Edwin H. Land
- 👤 Stanley M. Bloom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:26
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/30; G03C8/24; G03C8/26; G03C8/28; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31971
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
83 words
An image receiving element for use in a photographic silver diffusion transfer process which comprises a transparent support carrying a layer comprising noble metal silver-precipitating nuclei, gelatin and hydroxyethyl cellulose; wherein said nuclei are present in a level of about 0.1-0.4 mgs/ft 2 said gelatin at a level of about 0.05 to 1.5 mgs/ft 2 ; and said hydroxyethyl cellulose at a level of about 0.1 to 7 mgs/ft 2 ; and said hydroxyethyl cellulose is present in an excess over said gelatin.
Claim 2
Dependent Claim
83 words
An image receiving element for use in a photographic silver diffusion transfer process which comprises a transparent support carrying a layer comprising noble metal silver-precipitating nuclei, gelatin and hydroxyethyl cellulose; wherein said nuclei are present in a level of about 0.1-0.4 mgs/ft 2 said gelatin at a level of about 0.05 to 1.5 mgs/ft 2 ; and said hydroxyethyl cellulose at a level of about 0.1 to 7 mgs/ft 2 ; and said hydroxyethyl cellulose is present in an excess over said gelatin.
Claim 3
Dependent Claim
11 words
The element of claim 1 wherein said noble metal is palladium.
Claim 4
Dependent Claim
18 words
The element of claim 2 wherein said palladium is obtained by the reduction of a salt or complex.
Claim 5
Dependent Claim
43 words
The element as defined in claim 3 wherein said palladium is present at a level of 0.15 mgs/ft 2 ; said gelatin at a level of about 0.2 mgs/ft 2 and said hydroxyethyl cellulose at a level of about 1.0 mgs/ft 2 .
Claim 6
Dependent Claim
13 words
The element as defined in claim 1 which includes an additive color screen.
Claim 7
Dependent Claim
91 words
An image receiving element for use in an additive color photographic diffusion transfer process which comprises a transparent support carrying an additive color screen and a layer comprising palladium metal silver-precipitating nuclei, gelatin and hydroxyethyl cellulose wherein said nuclei are present at a level of about 0.15 mgs/ft 2 ; said gelatin is present at a level of about 0.20 mgs/ft 2 and said hydroxyethyl cellulose is present at a level of about 1.0 mgs/ft 2 and said palladium nuclei are formed by the reduction of palladous chloride with stannous chloride.
Claim 8
Dependent Claim
91 words
An image receiving element for use in an additive color photographic diffusion transfer process which comprises a transparent support carrying an additive color screen and a layer comprising palladium metal silver-precipitating nuclei, gelatin and hydroxyethyl cellulose wherein said nuclei are present at a level of about 0.15 mgs/ft 2 ; said gelatin is present at a level of about 0.20 mgs/ft 2 and said hydroxyethyl cellulose is present at a level of about 1.0 mgs/ft 2 and said palladium nuclei are formed by the reduction of palladous chloride with stannous chloride.
Claim 9
Dependent Claim
89 words
A silver diffusion transfer film unit which comprises a transparent support carrying, in order, a layer comprising noble metal silver-precipitating nuclei, gelatin and hydroxyethyl cellulose, wherein said nuclei are present at a level of about 0.1 to 0.4 mgs/ft 2 ; said gelatin at a level of about 0.05 to 1.5 mgs/ft 2 and said hydroxyethyl cellulose at a level of about 0.1 to 7 mgs/ft 2 ; a photosensitive silver halide layer; and an antihalation layer wherein said hydroxyethyl cellulose is present in an excess over said gelatin.
Claim 10
Dependent Claim
89 words
A silver diffusion transfer film unit which comprises a transparent support carrying, in order, a layer comprising noble metal silver-precipitating nuclei, gelatin and hydroxyethyl cellulose, wherein said nuclei are present at a level of about 0.1 to 0.4 mgs/ft 2 ; said gelatin at a level of about 0.05 to 1.5 mgs/ft 2 and said hydroxyethyl cellulose at a level of about 0.1 to 7 mgs/ft 2 ; a photosensitive silver halide layer; and an antihalation layer wherein said hydroxyethyl cellulose is present in an excess over said gelatin.
Claim 11
Dependent Claim
12 words
The film unit of claim 7 wherein said noble metal is palladium.
Claim 12
Dependent Claim
19 words
The film unit of claim 8 wherein said palladium is obtained by the reduction of a salt or complex.
Claim 13
Dependent Claim
18 words
The film unit of claim 7 wherein said silver halide emulsion is a panchromatically sensitized silver iodobromide emulsion.
Claim 14
Dependent Claim
12 words
The film unit of claim 7 which includes an additive color screen.
Claim 15
Dependent Claim
16 words
The film unit of claim 7 which includes a photographic processing composition containing sodium tetraborate decahydrate.
Claim 16
Dependent Claim
95 words
An additive color diffusion transfer film unit which comprises a transparent support carrying, in order, an additive color screen, a layer comprising palladium metal silver-precipitating nuclei, gelatin and hydroxyethyl cellulose wherein said nuclei are present at a level of about 0.15 mgs/ft 2 said gelatin is present at a level of about 0.2 mgs/ft 2 ; and said hydroxyethyl cellulose is present at a level of about 1.0 mgs/ft 2 and said palladium nuclei are formed by the reduction of palladous chloride with stannous chloride; a photosensitive silver halide emulsion layer; and an anti-halation layer.
Claim 17
Dependent Claim
95 words
An additive color diffusion transfer film unit which comprises a transparent support carrying, in order, an additive color screen, a layer comprising palladium metal silver-precipitating nuclei, gelatin and hydroxyethyl cellulose wherein said nuclei are present at a level of about 0.15 mgs/ft 2 said gelatin is present at a level of about 0.2 mgs/ft 2 ; and said hydroxyethyl cellulose is present at a level of about 1.0 mgs/ft 2 and said palladium nuclei are formed by the reduction of palladous chloride with stannous chloride; a photosensitive silver halide emulsion layer; and an anti-halation layer.
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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) | 1983-01-28 | 1983-07-30 | 1984-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-01-28 | 1987-07-30 | 1988-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-01-28 | 1991-07-30 | 1992-01-29 | $7700.00 | Window Closed / Lapsed |