US3647450A
Expired / Lapsed
US
⏱️ 0.0 years remaining
ELECTROLESS DEPOSITION OF Ni OR Co LIGHT-GENERATED Ag NUCLEI
Assignee: Ferrania SpA
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Filing: 1968-09-09
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Granted: 1972-03-07
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Expires: 1988-09-09
Abstract
Abstract An imaging process is shown wherein a recording element having a photosensitive layer comprising a composition which, upon light exposure, is capable of producing silver nuclei is exposed to a light image to cause formation of said nuclei. Upon said nuclei is then deposited a nonnoble metal by electroless deposition from a solution comprising a nonnoble metal and a reducing agent selected from the group consisting of an amine borane, a borohydride, and a combination of an amine borane and a borohydride. Also shown are recording elements produced by this method.
Inventors
- 👤 Ennio Calligaris
- 👤 Mario Rossello
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:52
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/64; G03C5/00; G03C5/58
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
69 words
An imaging process which comprises a. exposing to a light image a recording element having a photosensitive layer comprising a composition which, upon light exposure, is capable of producing silver nuclei; and b. plating nickel or cobalt metal selectively on said silver nuclei by electroless deposition from a solution comprising nickel or cobalt metal compound and, as a reducing agent, an amine borane, a borohydride, or a mixture thereof.
Claim 2
Dependent Claim
39 words
The imaging process of claim 2 additionally comprising washing said exposed recording element with a solution capable of dissolving said silver compound therefrom, thereby removing said silver compound from non-light-exposed areas of said element prior to said electroless deposition.
Claim 3
Dependent Claim
12 words
The process of claim 2 wherein said reducing agent is dimethylamine borane.
Claim 4
Dependent Claim
18 words
The process of claim 2 wherein said reducing agent is a mixture of dimethylamine borane and sodium borohydride.
Claim 5
Dependent Claim
68 words
An imaging process comprising a. exposing to a light image a recording element having a photosensitive layer comprising a compound of silver and an Iron III compound capable, upon light exposure, of reducing said compound of silver to silver nuclei; and b. depositing nickel or cobalt metal selectively on said silver nuclei by electroless deposition from a solution comprising a nickel or cobalt metal compound and dimethylamine borane.
Claim 6
Dependent Claim
64 words
A recording element comprising a layer having light-exposed areas and non-light-exposed areas, said layer having light-generated silver nuclei selectively in light-exposed areas and having a nickel or cobalt metal selectively superimposed on said silver nuclei by electroless deposition from a solution comprising said nickel or cobalt metal compound and an amine borane, a borohydride, or a mixture of an amine borane and a borohydride.
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) | 1975-03-07 | 1975-09-06 | 1976-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-07 | 1979-09-06 | 1980-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-07 | 1983-09-06 | 1984-03-07 | $7700.00 | Window Closed / Lapsed |