US3862019A
Expired / Lapsed
US
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Composition of electroplating bath for the electrodeposition of bright nickel
Assignee: Hull R O and Co Inc
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Filing: 1974-04-26
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Granted: 1975-01-21
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Expires: 1994-04-26
Abstract
Abstract An aqueous, acid electroplating bath which contains as brightening agents the synergistic combination of N-(3sulfopropyl) pyridinium inner salt and an acetylenic alcoholethylene oxide adduct.
Inventors
- 👤 William E Rosenberg
- 👤 William J Saas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:15
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/12; C25D3/14
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
21 words
A plating bath according to claim 1 including a suitable surfactant in an amount sufficient to prevent gas streaking and pitting.
Claim 2
Dependent Claim
40 words
A plating bath according to claim 2, including at least one compound selected from the group consisting of allyl sulfonic acids, aromatic sulfonic acids, aromatic sulfonamides and aromatic sulfonimides in an amount sufficient to further enhance the nickel deposit brightness.
Claim 3
Dependent Claim
23 words
A plating bath according to claim 2, wherein there is also present saccahrin in an amount sufficient to prevent gas streaking and pitting.
Claim 4
Dependent Claim
23 words
A plating bath according to claim 2, wherein there is also present dibenzenesulfonimide in an amount sufficient to prevent gas streaking and pitting.
Claim 5
Dependent Claim
24 words
A plating bath according to claim 2, wherein there is present naphthalene trisulfonic acid in an amount sufficient to prevent gas streaking and pitting.
Claim 6
Dependent Claim
39 words
A plating bath according to claim 1, wherein the amount of said N-(3-sulfopropyl) pyridinium inner salt ranges from about 0.05 to about 0.3g/l and the amount of said acetylenic alcohol-ethylene oxide adduct ranges from about 0.01 to about 0.1g/l.
Claim 7
Dependent Claim
31 words
A plating bath according to claim 1, wherein the amount of said N-(3-sulfopropyl) pyridinium inner salt is approximately 0.18g/l and the amount of said acctylenic alcohol-ethylene oxide adduct is approximately 0.03g/l.
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) | 1978-01-20 | 1978-07-22 | 1979-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-20 | 1982-07-22 | 1983-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-20 | 1986-07-22 | 1987-01-21 | $7700.00 | Window Closed / Lapsed |