US3671409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrodeposition of nickel
Assignee: London and Scandinavian Metallurgical Co Ltd
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Filing: 1970-05-04
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Granted: 1972-06-20
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Expires: 1990-05-04
Abstract
Abstract Known nickel plating baths can have large amounts of chloride incorporated in them. An improved nickel plating bath is described which has water-soluble bromide in it, preferably many times the weight of nickel present. The bath can include other electrodepositable metals besides nickel, so that the electrodeposition of hard nickel alloys can also be accomplished. The main result of the high bromide formulations proposed is to give deposits of nickel or its alloys which are notably free from stress. Many examples of nickel plating baths are given.
Inventors
- 👤 Ernest Charles Henry Barrett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:14
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/08; F01N13/087; C; C25; C25D; C25D3/00; C25D3/02; C25D3/12; C25D3/56; C25D3/562
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
20 words
A method as claimed in claim 1, wherein the pH value of the bath is between about 1.8 and 5.0.
Claim 2
Dependent Claim
14 words
immersing a substrate in the electroforming bath for receiving the desired electroforming deposit, and
Claim 3
Dependent Claim
52 words
electrolyzing said bath at a current density of up to 100 A.S.F. and at a bath temperature in the range of from 18* to 50* C. to thereby form on the substratE, at high throwing power, an electroformed article free for excessive stress and being characterized by great hardness and good ductility.
Claim 4
Dependent Claim
27 words
A method as claimed in claim 1, wherein step (3) is continued until an electroformed article is obtained which has a minimum thickness of about 0.1 inch.
Claim 5
Dependent Claim
35 words
A method as claimed in claim 1, wherein the bath also contains at least one source of metal ions selected from the group of metals consisting of cobalt, iron, zinc, manganese, uranium, molybdenum and vanadium.
Claim 6
Dependent Claim
16 words
A method as claimed in claim 1, wherein the bath contains a source of sulphite ions.
Claim 7
Dependent Claim
21 words
A method as claimed in claim 5, wherein the source of sulphite ions is up to 0.6 g/l of sodium sulphite.
Claim 8
Dependent Claim
25 words
A method as claimed in claim 1, wherein step (3) is carried out in a static bath at a current density below about 50 A.S.F.
Claim 9
Dependent Claim
51 words
An electrolytic bath for the production of electroformed nickel articles, comprising an acidic aqueous solution, devoid of ammonium ions, and comprising a source of nickel ions and at least one water-soluble bromide as a source of bromide ions, the weight of bromide being 5 to 20 times the weight of nickel.
Claim 10
Dependent Claim
21 words
An electrolytic bath as claimed in claim 8, wherein the pH value of the bath is between about 1.8 to 5.0.
References Cited (Backward Citations)
GB902499A
Cited
US3244603A
Cited
US3271274A
Cited
US3489660A
Cited
US3454376A
Cited
GB1059915A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |