US3790380A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image recording medium and process
Assignee: Raytheon Co
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Filing: 1969-05-28
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Granted: 1974-02-05
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Expires: 1989-05-28
Abstract
Abstract An electron and/or photon sensitive soluble copper salt in solution is coated upon a substrate, with subsequent evaporation of its solvent. For substrates which resist wetting by the copper salt solution, a wetting agent or film former is employed to obtain an even copper salt coating. For cases where the medium is to be electron exposed, resistivity of the medium is maintained at a sufficiently low level by an additional coating of adequately low resistivity applied beneath the cooper salt layer. After electron or photon exposure, the latent image is developed by exposing the latent image to metal vapor. Thereupon a stable and visible image is formed. The optical density of the image is proportional to the exposure. When the substrate is transparent, this image can be employed in projection.
Inventors
- 👤 W Mckee
- 👤 E Kaspaul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:33
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/04; C23C14/048; G; G03; G03C; G03C1/00; G03C1/72; G03C1/725; G03C5/00; G03C5/58; Y; Y10; Y10S; Y10S430/00; Y10S430/143
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
54 words
The image-recording medium of claim 1 wherein said copper salt is a water-soluble salt of copper in the valence 2 state selected from the group consisting of cupric bromide, cupric chloride, cupric sulfate, cupric formate, cupric acetate, cupric proprionate, cupric lactate and copper salts of 2-hydroxyisobutyric acid, glycolic acid, 2-hydroxylauric acid, and glyceric acid.
Claim 2
Dependent Claim
68 words
The image-recording medium of claim 1 wherein said copper salt is an organic solvent soluble salt of copper in the valence 2 state selected from the group consisting of copper salts of long-chain, fatty acids and complex organic acids consisting of oleic, linoleic, napthenic, stearic, undecylenic and behenic acids; and coordination compounds consisting of copper acetylacetonate, Bis (ethyl acetoacetAto) copper, Bis (1 phenyl 1, 3-butanediono), and copper dimethyldithiocarbamate.
Claim 3
Dependent Claim
38 words
The image-recording medium of claim 3 wherein a conductive layer is positioned between the substrate and the sensitive layer, said conductive layer being substantially visually transparent and providing resistivity of said medium below about 1 megohm per square.
Claim 4
Dependent Claim
162 words
The process of recording an image, said process comprising the steps of: providing a transparent substrate; dissolving essentially only a soluble copper salt which is sensitive to electron and photon radiation exposure in a liquid solvent to form a liquid solution consisting essentially of solvent and copper salt; coating the substrate with the liquid solution of radiation sensitive soluble copper salt; evaporating the solvent to provide a transparent deposited layer, the active ingredient consisting essentially of radiation sensitive copper salt on the substrate; imagewise exposing by electron or photon impingement the image-sensitive copper salt layer to provide a latent image configured in accordance with the exposure; developing the latent image by directing an elemental metal vapor flux of a metal which is less noble than copper at the latent image-carrying copper salt layer in subatmospheric pressure so that the elemental metal deposits as a solid in accordance with the latent image on the sensitive copper salt layer to produce a visible image.
Claim 5
Dependent Claim
44 words
The process of claim 5 further including the succeeding step of: projecting light onto the metal-developed, image-carrying substrate so that light passes through the substrate where no development metal has been image-wise deposited to project an image configured in accordance with the exposure step.
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) | 1977-02-04 | 1977-08-06 | 1978-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-04 | 1981-08-06 | 1982-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-04 | 1985-08-06 | 1986-02-05 | $7700.00 | Window Closed / Lapsed |