US4256825A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic element and photographic record prepared therefrom
Assignee: GAF Corp
•
Filing: 1979-06-08
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Granted: 1981-03-17
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Expires: 1999-06-08
Abstract
Abstract A photographic element, comprising a photographic base carrying a light-sensitive photographic silver halide emulsion layer and a photosensitive non-silver halide layer in operative association with said silver halide layer, said non-silver halide layer containing a light-sensitive composition selected from the group consisting of diazotype compositions, vesicular compositions and photosensitive polymers.
Inventors
- 👤 Frank J. Loprest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:26
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/09; G03F7/095; G03F7/0952; G03C; G03C1/00; G03C1/005; G03C1/46; Y; Y10; Y10S; Y10S430/00; Y10S430/167; Y10S430/168
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
105 words
A method for producing a radiograph which comprises providing a photographic element, having a photographic base carrying a light-sensitive photographic silver halide emulsion layer and a photosensitive non-silver halide layer in operative association with said silver halide layer, said non-silver halide layer being light-sensitive positive working diazotype composition with form azo dyes and the steps of imagewise exposure of said photographic element to x-ray radiation; development of the element to form a silver image; imagewise exposure of said non-silver halide layer through the silver image; and development of the non-silver halide layer to form a non-silver image corresponding to and in registry with silver image.
Claim 2
Independent Claim
105 words
A method for producing a radiograph which comprises providing a photographic element, having a photographic base carrying a light-sensitive photographic silver halide emulsion layer and a photosensitive non-silver halide layer in operative association with said silver halide layer, said non-silver halide layer being light-sensitive positive working diazotype composition with form azo dyes and the steps of imagewise exposure of said photographic element to x-ray radiation; development of the element to form a silver image; imagewise exposure of said non-silver halide layer through the silver image; and development of the non-silver halide layer to form a non-silver image corresponding to and in registry with silver image.
Claim 3
Dependent Claim
21 words
The method of claim 1, wherein the silver halide and non-silver halide layers are provided on opposite sides of the base.
Claim 4
Dependent Claim
28 words
The method according to claim 1, wherein the layers are on the same side of the base, with the silver halide layer being over said non-silver halide layer.
Claim 5
Dependent Claim
37 words
The method according to claim 1, wherein said base is a transparent or translucent material selected from the group consisting of polyester, polycarbonate, cellulose acetate, cellulose acetate butyrate, cellulose acetate propionate, polystyrene, polyvinyl chloride and polyvinyl acetate.
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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) | 1984-03-16 | 1984-09-15 | 1985-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-16 | 1988-09-15 | 1989-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-16 | 1992-09-15 | 1993-03-17 | $7700.00 | Window Closed / Lapsed |