US3935013A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electroless deposition of a copper-nickel alloy on an imagewise pattern of physically developable metal nuclei
Assignee: Eastman Kodak Co
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Filing: 1973-11-12
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Granted: 1976-01-27
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Expires: 1993-11-12
Abstract
Abstract A physical developer composition for latent images comprises a mixture of at least one copper salt and at least one nickel salt and a reducing agent for copper and nickel salts wherein the nickel and copper salts are in such proportions that upon reduction to a metal alloy, the alloy contains from 9 to 98 mole percent copper and from 2 to 91 mole percent nickel.
Inventors
- 👤 Mark Lelental
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:58
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/58
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
63 words
A developed photographic element comprising a support having thereon physically developable metal nuclei in an imagewise pattern and an imagewise coating of a copper nickel alloy containing from 9 to 98 mole percent copper and from 2 to 91 percent of nickel based on total moles of copper and nickel said coating being formed by electroless deposition of said alloy onto said nuclei.
Claim 2
Dependent Claim
63 words
A developed photographic element comprising a support having thereon physically developable metal nuclei in an imagewise pattern and an imagewise coating of a copper nickel alloy containing from 9 to 98 mole percent copper and from 2 to 91 percent of nickel based on total moles of copper and nickel said coating being formed by electroless deposition of said alloy onto said nuclei.
Claim 3
Dependent Claim
24 words
The element of claim 1 wherein the alloy contains from 20 to 60 mole percent copper and from 40 to 80 mole percent nickel.
Claim 4
Independent Claim
84 words
The method of developing an image comprising contacting physically developable metal nuclei in an imagewise pattern with a photographic, physical developer composition comprising a mixture of at least one copper salt and at least one nickel salt and at least one reducing agent for copper salt and nickel salt; said copper salt and nickel salt being in such proportion that upon reduction to a metal alloy, the alloy contains from 9 to 98 mole percent copper and from 2 to 91 mole percent nickel.
Claim 5
Independent Claim
84 words
The method of developing an image comprising contacting physically developable metal nuclei in an imagewise pattern with a photographic, physical developer composition comprising a mixture of at least one copper salt and at least one nickel salt and at least one reducing agent for copper salt and nickel salt; said copper salt and nickel salt being in such proportion that upon reduction to a metal alloy, the alloy contains from 9 to 98 mole percent copper and from 2 to 91 mole percent nickel.
Claim 6
Dependent Claim
28 words
The method of claim 3 wherein the physically developable metal nuclei in an imagewise pattern are formed by the imagewise exposure of a photosensitive material to actinic radiation.
Claim 7
Dependent Claim
11 words
The method of claim 3 wherein the reducing agent comprises hypophosphite.
Claim 8
Dependent Claim
14 words
The method of claim 3 wherein the developer composition also comprises a complexing agent.
Claim 9
Dependent Claim
11 words
The method of claim 6 wherein the complexing agent is pyrophosphate.
Claim 10
Dependent Claim
11 words
The method of claim 6 wherein the complexing agent is ammonia.
Claim 11
Dependent Claim
12 words
The method of claim 6 wherein the complexing agent is gluconic acid.
Claim 12
Dependent Claim
11 words
The method of claim 6 wherein the complexing agent is ethanolamine.
Claim 13
Dependent Claim
26 words
The method of claim 3 wherein the developer composition comprises from 2.5 to 30 mole percent of copper based on total moles of copper and nickel.
Claim 14
Dependent Claim
40 words
The method of claim 3 wherein the proportion of copper salt and nickel salt is such that upon reduction to metal alloy, the alloy contains from 20 to 60 mole percent copper and from 40 to 80 mole percent nickel.
Claim 15
Dependent Claim
39 words
The method of claim 3 wherein the developer composition comprises from about 0.001 to about 1.0 moles per liter of composition of reducing agent and from about 0.01 to about 10 moles per liter of composition of complexing agent.
Claim 16
Dependent Claim
12 words
The method of claim 17 wherein the copper salt is copper chloride.
Claim 17
Dependent Claim
12 words
The method of claim 3 wherein the nickel salt is nickel chloride.
Claim 18
Dependent Claim
19 words
The method of claim 3 wherein the development is carried out at a temperature of from 20°C to 100°C.
Claim 19
Dependent Claim
29 words
The method of claim 4 wherein the developer is contacted with the imagewise exposed photosensitive material by immersion of the photosensitive material into a bath of the developer composition.
Claim 20
Dependent Claim
14 words
The method of claim 4 wherein the photosensitive material comprises a copper (I) complex.
Claim 21
Dependent Claim
12 words
The method of claim 3 whereinn the reducing agent comprises dimethylamine borane.
References Cited (Backward Citations)
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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) | 1979-01-26 | 1979-07-28 | 1980-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-26 | 1983-07-28 | 1984-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-26 | 1987-07-28 | 1988-01-27 | $7700.00 | Window Closed / Lapsed |