US3658524A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic film unit comprising silver halide and a dyeable stratum contained on a common support and process employing same
Assignee: Polaroid Corp
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Filing: 1969-09-29
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Granted: 1972-04-25
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Expires: 1989-09-29
Abstract
Abstract Novel systems for preparing dye images utilizing novel film units including a layer of a light-sensitive silver halide, a color-providing material disposed in this layer or in an adjacent layer, which color-providing material is non-diffusible, but, upon oxidation, can release a diffusible color-providing moiety for transfer, said film unit further including a dyeable stratum separable from the aforementioned layer or layers.
Inventors
- 👤 Joel M Piesach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:34
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/02; G03C8/08; G03C8/10; G03C8/42; G03C8/50; G03C8/52
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
23 words
A product as defined in claim 1 wherein said layer of non-diffusible material is contained in the same layer as said silver halide.
Claim 2
Dependent Claim
23 words
A product as defined in claim 1 including a stripping layer disposed on the surface of said dyeable stratum opposed from said support.
Claim 3
Dependent Claim
13 words
A product as defined in claim 1 wherein said support is substantially transparent.
Claim 4
Dependent Claim
16 words
A photographic product as defined in claim 1 wherein said non-diffusible material is of the formula:
Claim 5
Dependent Claim
34 words
A photographic product comprising a support carrying on one side thereof, in order, a dyeable stratum, a stripping layer, and a layer containing a light-sensitive silver halide emulsion and a compound of the formula:
Claim 6
Dependent Claim
155 words
A photographic process comprising the steps of exposing a product as defined in claim 1 to form a developable image; developing said image by applying to the thus exposed product an aqueous alkaline processing composition including a silver halide developing agent which when oxidized is capable of undergoing a redox reaction with said non-diffusible material; as a function of said development providing an imagewise distribution of oxidized developing agent in terms of developed areas of said silver halide layer; contacting said non-diffusible material with said imagewise distribution of oxidized developing agent whereby said material is selectively oxidized by a redox reaction with said oxidized silver halide developing agent to effect said ring-closure and to release said diffusible color-providing moiety in an imagewise pattern corresponding to said imagewise distribution of oxidized developing agent; and transferring said imagewise pattern of diffusible color-providing material, by diffusion, to said dyeable stratum whereby to impart thereto a color transfer image.
Claim 7
Dependent Claim
15 words
A process as defined in claim 7 wherein said color image is a negative transparency.
Claim 8
Dependent Claim
17 words
A process as defined in claim 7 wherein said non-diffusible material is a compound of the foRmula:
Claim 9
Dependent Claim
31 words
A process as defined in claim 9 wherein said development is effected by spreading said aqueous processing composition in a substantially uniform layer between said product and a superposed sheet material.
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) | 1975-04-25 | 1975-10-25 | 1976-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-25 | 1979-10-25 | 1980-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-25 | 1983-10-25 | 1984-04-25 | $7700.00 | Window Closed / Lapsed |