US3644183A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for coating an object with a bright nickel/chromium coatin
Assignee: Research Holland NV
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Filing: 1968-02-19
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Granted: 1972-02-22
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Expires: 1988-02-19
Abstract
Abstract Objects are coated with a basic bright nickel layer, an intermediate layer in which solid particles are embedded, and a chromium layer. The solid particles comprise particles of a solid, nonacid-resistant silicate which gives an alkaline reaction in aqueous suspension. The resulting composite coating has an outstanding corrosion resistance.
Inventors
- 👤 Jules Marie Odekerken
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:44
CPC Classifications
C; C25; C25D; C25D15/00; C25D15/02; C23; C23C; C23C18/00; C23C18/16; C23C18/31; C23C18/32; C23C18/34; C23C18/36; C25D5/00; C25D5/10; C25D5/12; C25D5/14; C25D5/60; C25D5/623; C25D5/627; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/934; Y10S428/935; Y10T; Y10T428/00; Y10T428/12; Y10T428/12451; Y10T428/12493; Y10T428/1266; Y10T428/12771; Y10T428/12806; Y10T428/12826; Y10T428/12847; Y10T428/12854; Y10T428/12861; Y10T428/12944
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
19 words
A process according to claim 1, wherein the average diameter of said particles does not exceed about 1 micron.
Claim 2
Dependent Claim
28 words
A process according to claim 2, wherein the concentration of said particles in said plating bath is in the range of about 2-20 grams per liter of bath.
Claim 3
Dependent Claim
39 words
A process according to claim 3, wherein said silicate is the product of heating at a temperature between 90* C. and 105* C. a mixture of finely divided diatomaceous earth, a hydroxide of an alkaline earth metal, and water.
Claim 4
Dependent Claim
26 words
A process according to claim 2, wherein the concentration of said particles in said plating bath is at least about 2 grams per liter of bath.
Claim 5
Dependent Claim
27 words
A process according to claim 1, wherein said particles include a corrosion inhibitor, said corrosion inhibitor being a substance which inhibits the corrosion of iron and/or nickel.
Claim 6
Dependent Claim
23 words
A process according to claim 6, wherein said corrosion inhibitor is selected from the group consisting of dimethyl glyoxime, hydrazine and dicyclohexylamine nitrite.
Claim 7
Dependent Claim
16 words
A process according to claim 1, wherein said intermediate coating is deposited electrolytically utilizing electrical current.
Claim 8
Dependent Claim
21 words
A process according to claim 1, wherein said intermediate layer is deposited by reduction without the use of an electric current.
Claim 9
Dependent Claim
19 words
A process according to claim 1, wherein the thickness of said intermediate layer does not exceed about 2.5 microns.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-21 | 1975-08-23 | 1976-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-21 | 1979-08-23 | 1980-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-21 | 1983-08-23 | 1984-02-22 | $7700.00 | Window Closed / Lapsed |