US2930740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrodeposition of tin
Assignee: Bethlehem Steel Corp
•
Filing: 1958-05-14
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Granted: 1960-03-29
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Expires: 1978-05-14
Abstract
No abstract record available.
Inventors
- 👤 Herbert H Francisco
- 👤 Homer G Ressler
- 👤 George W Ward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:43
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
AN AQUEOUS ELECTROLYTIC TINPLATING BATH COMPRISES STANNOUS SULFATE IN THE AMOUNT OF FROM 9-55 G./L., SULFATE RADICAL, INTRODUCED AS SULFURIC ACID, IN EXCESS OF THAT STOICHIOMETRICALLY EQUIVALENT TO THE STANNOUS TIN BY AN AMOUNT OF FROM 30-80 G./L., SODIUM FLUORIDE IN THE AMOUNT OF FROM 30-80 G./L., AN ORGANIC ADDITION AGENT, AND APPROXIMATELY 1 G./L., OF SODIUM BIFLUORIDE FOR EACH GRAM PER LITER OF TIN IN EXCESS OF 10 F./L., WHEREIN THE RATION OF SAID EXCESS SULFATE RADICAL TO SODIUM FLUORIDE IS APPROXIMATELY 1:1.
Claim 2
Dependent Claim
84 words
AN AQUEOUS ELECTROLYTIC TINPLATING BATH COMPRISES STANNOUS SULFATE IN THE AMOUNT OF FROM 9-55 G./L., SULFATE RADICAL, INTRODUCED AS SULFURIC ACID, IN EXCESS OF THAT STOICHIOMETRICALLY EQUIVALENT TO THE STANNOUS TIN BY AN AMOUNT OF FROM 30-80 G./L., SODIUM FLUORIDE IN THE AMOUNT OF FROM 30-80 G./L., AN ORGANIC ADDITION AGENT, AND APPROXIMATELY 1 G./L., OF SODIUM BIFLUORIDE FOR EACH GRAM PER LITER OF TIN IN EXCESS OF 10 F./L., WHEREIN THE RATION OF SAID EXCESS SULFATE RADICAL TO SODIUM FLUORIDE IS APPROXIMATELY 1:1.
References Cited (Backward Citations)
US2402185A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-29 | 1963-09-28 | 1964-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-29 | 1967-09-28 | 1968-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-29 | 1971-09-28 | 1972-03-29 | $7700.00 | Window Closed / Lapsed |