US4368223A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing nickel layer
Assignee: AGC Inc
•
Filing: 1981-06-01
•
Granted: 1983-01-11
•
Expires: 2001-06-01
Abstract
Abstract A nickel layer is prepared by applying a nickel salt and a reducing agent for reducing said nickel salt, on a substrate and reducing said nickel salt by a chemical reaction. The chemical reduction is carried out in the presence of at least one compound selected from the group consisting of diethylenetriamine, and imidazole.
Inventors
- 👤 Takayuki Kobayashi
- 👤 Ryo Tamamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:36
CPC Classifications
C; C23; C23C; C23C18/00; C23C18/16; C23C18/31; C23C18/32; C23C18/34
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
82 words
In a process for preparing a transparent nickel layer by applying a solution containing a nickel salt and a reducing agent for the reduction of said nickel salt onto a substrate and reducing the nickel salt by a chemical reaction, the improvement comprising: conducting said chemical reduction with a solution containing from 0.02 to 20 wt % of diethylenetriamine or imidazole based on the amount of said nickel salt which enhances the visible and solar energy transmissivity values of the transparent layer.
Claim 2
Dependent Claim
82 words
In a process for preparing a transparent nickel layer by applying a solution containing a nickel salt and a reducing agent for the reduction of said nickel salt onto a substrate and reducing the nickel salt by a chemical reaction, the improvement comprising: conducting said chemical reduction with a solution containing from 0.02 to 20 wt % of diethylenetriamine or imidazole based on the amount of said nickel salt which enhances the visible and solar energy transmissivity values of the transparent layer.
Claim 3
Dependent Claim
28 words
The process of claim 1, wherein said reducing agent is sodium borohydride, potassium borohydride, formaldehyde, sodium hypophosphite, hydrazine, hydrazinium sulfate, glyoxal, dimethylamine borazane, hydrosulfite, diethylborozane or mixtures thereof.
Claim 4
Dependent Claim
18 words
The process of claim 1, wherein the concentration of nickel salt in solution is about 0.1 to 10%.
Claim 5
Dependent Claim
22 words
The process of claim 1, wherein said plating is conducted at a temperature in the range of 10° C. to 60° C.
Claim 6
Dependent Claim
23 words
The process of claim 1, wherein said nickel salt is nickel chloride, nickel sulfate, nickel acetate, nickel bromide, nickel iodide or mixtures thereof.
Claim 7
Dependent Claim
28 words
The process of claim 1, wherein said solution further contains a chelating agent selected from the group consisting of Rochelle salt, ethylenediaminetetraacetic acid, sodium citrate and sodium gluconate.
Claim 8
Dependent Claim
20 words
The process of claim 1, wherein said solution contains malic acid, boric acid or mixtures thereof as a buffering agent.
Claim 9
Dependent Claim
21 words
The process of claim 1, wherein the concentration of said diethylenetriamine or imidazole in solution ranges from 1 to 1000 ppm.
Claim 10
Dependent Claim
80 words
In a process for preparing a transparent nickel layer by applying a solution containing a nickel salt and a reducing agent for the reduction of said nickel salt onto a substrate and reducing the nickel salt by a chemical reaction, the improvement comprising: conducting said chemical reduction with a solution containing from 0.02 to 20 wt % of imidazole based on the amount of said nickel salt which enhances the visible and solar energy transmissivity values of the transparent layer.
Claim 11
Dependent Claim
80 words
In a process for preparing a transparent nickel layer by applying a solution containing a nickel salt and a reducing agent for the reduction of said nickel salt onto a substrate and reducing the nickel salt by a chemical reaction, the improvement comprising: conducting said chemical reduction with a solution containing from 0.02 to 20 wt % of imidazole based on the amount of said nickel salt which enhances the visible and solar energy transmissivity values of the transparent layer.
References Cited (Backward Citations)
US2956900A
Cited
US3234031A
Cited
US3373054A
Cited
US3672939A
Cited
US4065626A
Cited
US4301196A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-01-10 | 1986-07-12 | 1987-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-10 | 1990-07-12 | 1991-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-10 | 1994-07-12 | 1995-01-11 | $7700.00 | Window Closed / Lapsed |