US3661730A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the formation of a super-bright solder coating
Assignee: Individual
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Filing: 1969-09-22
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Granted: 1972-05-09
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Expires: 1989-09-22
Abstract
Abstract A process for electrodepositing solder on a basis material from an aqueous, acidic bath comprising stannous and plumbous compounds, o-toluidine or a 2-alkyl anil as a brightening agent and a non-ionic surface-active agent as a dispersant, to obtain a super-bright solder coating on the basis material.
Inventors
- 👤 Kazuo Nishihara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:27
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/56; C25D3/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
A process for electroplating onto a basis material with a bright solder of a 60 percent tin and 40 percent lead alloy which comprises electrodepositing the solder on the basis material from an aqueous acidic bath comprising (1) stannous borofluoride and plumbous borofluoride, (2) 70 g./l. of free HBF4, (3) 10 ml./l. of formalin, (4) 20 ml/l of a 50 percent solution of O-toluidine in n-butyl alcohol as a brightener, and (5) 2 ml./l. of a mixture of wherein R is an alkyl group having eight or nine carbon atoms and n is an integer of 8 to 15 and wherein R is an alkyl group having 12 to 18 carbon atoms and n and n1 are an integer of 0 to 20 in the ratio of 1:1, with a current density of 2 A./dm2.
Claim 2
Dependent Claim
132 words
A process for electroplating onto a basis material with a bright solder of a 60 percent tin and 40 percent lead alloy which comprises electrodepositing the solder on the basis material from an aqueous acidic bath comprising (1) stannous borofluoride and plumbous borofluoride, (2) 70 g./l. of free HBF4, (3) 10 ml./l. of formalin, (4) 20 ml./l. of a 40 percent solution of 2-ethylanil in isopropyl alcohol, and (5) 2 ml./l. of a mixture of wherein R is an alkyl group having eight or nine carbon atoms and n is an integer of 8 to 15 and wherein R is an alkyl group having 12 to 18 carbon atoms and n and n1 are an integer of 0 to 20 in the ratio of 1:1, with a current density of 2 A/dm2.
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) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |