US3323938A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of coating tin over basis metals
Assignee: Dow Chemical Co
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Filing: 1963-11-18
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Granted: 1967-06-06
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Expires: 1983-11-18
Abstract
No abstract record available.
Inventors
- 👤 Leonard M Vaught
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:43
CPC Classifications
C; C23; C23C; C23C18/00; C23C18/16; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/936; Y10S428/939; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12687; Y10T428/12708; Y10T428/12771; Y10T428/12785; Y10T428/12792; Y10T428/12799
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
87 words
A METHOD OF COATING TIN OVER ZINC WHICH COMPRISES PROVIDING ZINC-GALVANIZED STEEL AT A TEMPERATURE OF FROM ABOUT 230 TO ABOUT 470 DEGEES CENTIGRADE, PROVIDING AN AQUEOUS BATH CONTAINING ABOUT 17 PERCENT BY WEIGHT STANNOUS CHLORIDE, SAID BATH BEING AT ROOM TEMPERATURE, IMMERSING SAID ZINC-GALVANIZED STEEL IN SAID BATH, THEREBY COATING TIN OVER THE ZINC AT A COATING TEMPERATURE OF FROM ABOUT 200 TO ABOUT 250 DEGREES CENTIGRADE, AND REMOVING THE TIN-COATED ZINC-GALVANIZED STEEL FROM THE SOLUTION AFTER AT LEAST ABOUT TWO SECONDS AT THE COATING TEMPERATURE.
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) | 1970-06-05 | 1970-12-05 | 1971-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-05 | 1974-12-05 | 1975-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-05 | 1978-12-05 | 1979-06-06 | $7700.00 | Window Closed / Lapsed |