US4132610A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of bright electroplating of tin-lead alloy
Assignee: Hyogo Prefectural Government
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Filing: 1976-05-18
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Granted: 1979-01-02
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Expires: 1996-05-18
Abstract
Abstract A method of electroplating of tin-lead alloys, which comprises using a solution containing hydroxyalkyl sulfonic acid and its divalent tin salts and lead salts, said solution being mixed with reaction products of acetaldehyde with O-toluidine as additives for brightening.
Inventors
- 👤 Nobuyasu Dohi
- 👤 Keigo Obata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:56
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/56; C25D3/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
a method of bright electroplating of tin-lead alloy which is characterized by using a plating solution containing hydroxyalkyl sulfonic acid and its divalent tin salts and lead salts, represented by the general formula, ##STR2## said solution being mixed with reaction products of acetaldehyde with O-toluidine as additives for brightening.
Claim 2
Independent Claim
49 words
a method of bright electroplating of tin-lead alloy which is characterized by using a plating solution containing hydroxyalkyl sulfonic acid and its divalent tin salts and lead salts, represented by the general formula, ##STR2## said solution being mixed with reaction products of acetaldehyde with O-toluidine as additives for brightening.
References Cited (Backward Citations)
GB1151460A
Cited
US3905878A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-01-01 | 1982-07-03 | 1983-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-01 | 1986-07-03 | 1987-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-01 | 1990-07-03 | 1991-01-02 | $7700.00 | Window Closed / Lapsed |