US4242376A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for metal plating of powder by substitution
Assignee: Nihon Kogyo KK
•
Filing: 1979-10-16
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Granted: 1980-12-30
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Expires: 1999-10-16
Abstract
Abstract A method for plating a powder with a metal by substitution, which comprises adding a crystalline powder of a metal chloride hydrate after and/or during mixing a powder to be plated and a reducing metal powder, and after the initiation of the reaction, adding water and/or hydrochloric acid.
Inventors
- 👤 Yoshio Kawasumi
- 👤 Mitsuo Takahashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:30
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; B; B22; B22F; B22F1/00; B22F1/18; C04B20/00; C04B20/10; C04B20/1055; C04B35/00; C04B35/515; C04B35/52; C04B41/45; C04B41/50; C04B41/51; C04B41/5144; C04B41/80; C04B41/81; C04B41/85; C04B41/88; C22; C22B; C22B5/00; C22B5/02; C22B5/04; C23; C23C; C23C18/00; C23C18/54
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
65 words
A method for plating a powder with a metal by substitution, which comprises adding a crystalline powder of a metal chloride hydrate, wherein the metal of said metal chloride hydrate is a metal having a negative standard electrode potential, after and/or during mixing a powder to be plated and a reducing metal powder, and after the initiation of the reaction, adding water and/or hydrochloric acid.
Claim 2
Independent Claim
65 words
A method for plating a powder with a metal by substitution, which comprises adding a crystalline powder of a metal chloride hydrate, wherein the metal of said metal chloride hydrate is a metal having a negative standard electrode potential, after and/or during mixing a powder to be plated and a reducing metal powder, and after the initiation of the reaction, adding water and/or hydrochloric acid.
Claim 3
Dependent Claim
12 words
The method of claim 1, wherein said metal is nickel and/or cobalt.
Claim 4
Dependent Claim
16 words
The method of claim 1, wherein said reducing metal is Ca, Mg, Al, Fe or Zn.
Claim 5
Dependent Claim
13 words
The method of claim 3, wherein said reducing metal is Mg or Al.
Claim 6
Dependent Claim
28 words
The method of claim 1, wherein the amount of water and/or hydrochloric acid is such that the slurry concentration after the substitution reaction is 500 to 700 g/l.
Claim 7
Independent Claim
20 words
The method of claims 1 or 5, wherein the concentration of hydrochloric acid is about 15 to 20% by weight.
Claim 8
Dependent Claim
11 words
The method of claim 4, wherein said reducing metal is Mg.
Claim 9
Dependent Claim
11 words
The method of claim 4, wherein said reducing metal is Al.
References Cited (Backward Citations)
US2483075A
Cited
US3438805A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-12-30 | 1984-06-30 | 1984-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-30 | 1988-06-30 | 1988-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-30 | 1992-06-30 | 1992-12-30 | $7700.00 | Window Closed / Lapsed |