US2598486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic tin plating baths
Assignee: United States Steel Corp
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Filing: 1951-01-12
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Granted: 1952-05-27
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Expires: 1971-01-12
Abstract
No abstract record available.
Inventors
- 👤 John W Andrews
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:59
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/30; C25D3/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
AN ELECTROLYTIC TIN PLATING BATH CONSISTING OF AN AQUEOUS ACID SOLUTION 10 TO 80 GRAMS PER LITER OF TIN IN THE FORM OF A STANNOUS SALT OF AN ACID OF THE GROUP CONSISTING OF PHENOLSULFONIC ACID, BENZENE META-DISULFONIC ACID AND SULPHURIC ACID, AND THE REACTION PRODUCT FORMED BY DIS SOLVING AN AMINE IN SAID SOLUTION AND GRADUALLY ADDING FORMALDEHYDE THERETO AT A TEMPERATURE OF 40* TO 60* C., THE AMINE BEING PRESENT IN A CONCENTRATION OF 2 TO 6 GRAMS PER LITER AND BEING OF THE GROUP CONSISTING OF ANILINE, TOLUIDINE, XYLIDINE AND CHLORANILINE, THE FORMALDEHYDE BEING PRESENT IN AN AMOUNT OF 1 TO 3 MOLS OF FORMALDEHYDE PER MOL OF AMINE, SAID SOLUTION HAVING A TOTAL FREE ACID CONTENT EXPRESSED AS THE H2SO4 EQUIVALENT OF 20 TO 50 GRAMS PER LITER.
Claim 2
Dependent Claim
132 words
AN ELECTROLYTIC TIN PLATING BATH CONSISTING OF AN AQUEOUS ACID SOLUTION 10 TO 80 GRAMS PER LITER OF TIN IN THE FORM OF A STANNOUS SALT OF AN ACID OF THE GROUP CONSISTING OF PHENOLSULFONIC ACID, BENZENE META-DISULFONIC ACID AND SULPHURIC ACID, AND THE REACTION PRODUCT FORMED BY DIS SOLVING AN AMINE IN SAID SOLUTION AND GRADUALLY ADDING FORMALDEHYDE THERETO AT A TEMPERATURE OF 40* TO 60* C., THE AMINE BEING PRESENT IN A CONCENTRATION OF 2 TO 6 GRAMS PER LITER AND BEING OF THE GROUP CONSISTING OF ANILINE, TOLUIDINE, XYLIDINE AND CHLORANILINE, THE FORMALDEHYDE BEING PRESENT IN AN AMOUNT OF 1 TO 3 MOLS OF FORMALDEHYDE PER MOL OF AMINE, SAID SOLUTION HAVING A TOTAL FREE ACID CONTENT EXPRESSED AS THE H2SO4 EQUIVALENT OF 20 TO 50 GRAMS PER LITER.
References Cited (Backward Citations)
US1987749A
Cited
US2450795A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-05-27 | 1955-11-26 | 1956-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-27 | 1959-11-26 | 1960-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-27 | 1963-11-26 | 1964-05-27 | $7700.00 | Window Closed / Lapsed |