Patent US3981781A successfully refreshed from Google Patents.
US3981781A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytically formed composite coatings
Assignee: Suzuki Motor Corp
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Filing: 1974-08-09
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Granted: 1976-09-21
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Expires: 1994-08-09
Abstract
Abstract In a method for electrolytically forming on a metal surface a composite coating having improved hardness and wear resistance, a compound containing phosphorous is added into the plating electrolyte, with the phosphorous content being in a quantity of between about 0.1 to 4.2 g/l with minute particles of a required property suspended therein thereby to coprecipitate a nickel phosphide together with the minute particles, whereby the physical and chemical properties of the composite coating are remarkably improved.
Inventors
- 👤 Yasunobu Mori
- 👤 Shinjiro Otsuka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:12
CPC Classifications
C; C25; C25D; C25D15/00; C25D15/02
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
81 words
A method for improving the properties of an electrolytically plated composite layer containing nickel and minute particles codeposited on a substrate comprising the steps of providing a nickel plating electrolyte having a pH of between about 3.5 to 6.0 and containing minute particles, adding to said nickel plating electrolyte a compound containing phosphorous in an amount of between about 0.1 and 4.2 grams per liter, and electrolytically depositing nickel and phosphorous along with said minute particles to produce a composite coating.
Claim 2
Independent Claim
81 words
A method for improving the properties of an electrolytically plated composite layer containing nickel and minute particles codeposited on a substrate comprising the steps of providing a nickel plating electrolyte having a pH of between about 3.5 to 6.0 and containing minute particles, adding to said nickel plating electrolyte a compound containing phosphorous in an amount of between about 0.1 and 4.2 grams per liter, and electrolytically depositing nickel and phosphorous along with said minute particles to produce a composite coating.
Claim 3
Dependent Claim
25 words
A method as set forth in claim 1 wherein the phosphorous is added in an amount of between about 0.2 and 2.8 grams per liter.
Claim 4
Dependent Claim
20 words
A method as set forth in claim 1 wherein the phosphorous compound added into the plating electrolyte is sodium hypophosphite.
Claim 5
Dependent Claim
24 words
A method as set forth in claim 1 wherein the phosphorous compound added into the electrolytic liquid is a 30% solution of phosphorous acid.
Claim 6
Dependent Claim
20 words
A method as set forth in claim 1 wherein the pH of the electrolyte is between about 3.5 and 4.5.
Claim 7
Dependent Claim
20 words
A method as set forth in claim 2 wherein the pH of the electrolyte is between about 3.5 and 4.5.
Claim 8
Dependent Claim
21 words
A method as set forth in claim 1 wherein the size of said minute particles is between about 0.2μ and 20μ.
Claim 9
Dependent Claim
21 words
A method as set forth in claim 1 wherein the size of said minute particles is between about 1μ and 5μ.
Claim 10
Dependent Claim
21 words
A method as set forth in claim 5 wherein the size of said minute particles is between about 0.2μ and 20μ.
Claim 11
Dependent Claim
21 words
A method as set forth in claim 5 wherein the size of said minute particles is between about 1μ and 5μ.
Claim 12
Dependent Claim
22 words
A method as set forth in claim 2 wherein the size of said minute particles is between about 0.2μ and 20μ .
Claim 13
Dependent Claim
21 words
A method as set forth in claim 2 wherein the size of said minute particles is between about 1μ and 5μ.
Claim 14
Dependent Claim
21 words
A method as set forth in claim 6 wherein the size of said minute particles is between about 0.2μ and 20μ.
Claim 15
Dependent Claim
21 words
A method as set forth in claim 6 wherein the size of said minute particles is between about 1μ and 5μ.
Claim 16
Dependent Claim
14 words
A method as set forth in claim 2 wherein said minute particles are SiC.
Claim 17
Dependent Claim
14 words
A method as set forth in claim 1 wherein said minute particles are SiC.
Claim 18
Dependent Claim
14 words
A method as set forth in claim 7 wherein said minute particles are SiC.
Claim 19
Dependent Claim
14 words
A method as set forth in claim 8 wherein said minute particles are SiC.
Claim 20
Independent Claim
69 words
A method for improving the properties of an electrolytically plated composite layer containing nickel and minute particles codeposited on a substrate comprising the steps of providing a nickel plating electrolyte having a pH of between about 3.5 to 6.0 and containing minute particles, adding to said nickel plating electrolyte a compound containing phosphorous, and electrolytically depositing nickel and phosphorous along with said minute particles to produce a composite coating.
Claim 21
Independent Claim
69 words
A method for improving the properties of an electrolytically plated composite layer containing nickel and minute particles codeposited on a substrate comprising the steps of providing a nickel plating electrolyte having a pH of between about 3.5 to 6.0 and containing minute particles, adding to said nickel plating electrolyte a compound containing phosphorous, and electrolytically depositing nickel and phosphorous along with said minute particles to produce a composite coating.
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) | 1979-09-21 | 1980-03-22 | 1980-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-21 | 1984-03-22 | 1984-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-21 | 1988-03-22 | 1988-09-21 | $7700.00 | Window Closed / Lapsed |