US2746915A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic metal treatment and article
Assignee: Autoyre Co Inc
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Filing: 1951-10-15
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Granted: 1956-05-22
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Expires: 1971-10-15
Abstract
No abstract record available.
Inventors
- 👤 William C Giesker
- 👤 Richard K Britton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:58
CPC Classifications
C; C25; C25D; C25D11/00; C25D11/38
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
107 words
THE METHOD OF INCREASING THE CORROSION RESISTANCE OF A STEEL ARTICLE HAVING A PLATING OF CHROMIUM THEREON WHICH IS NORMALLY CATHODIC TO THE STEEL OF THE ARTICLE WHEN IMMERSED IN A SODIUM CHLORIDE SOLUTION, WHICH COMPRISES FORMING A COATING OVER THE CHROMIUM PLATING WHICH IS ANODIC TO THE STEEL OF THE ARTICLE BY CONNECTING THE ARTICLE AS A CATHODE IN AN AQUEOUS ELECTROLYTE CONSISTING ESSENTIALLY OF A HEXAVALENT CHROMIUM-CONTAINING COMPOUND, PASSING AN ELECTRIC CURRENT THROUGH SAID ELECTROLYTE HAVING A CURRENT DENSITY OF FROM ABOUT .1 TO 15 AMPERES PER SQUARE FOOT OF CATHODE, AND MAINTAINING THE TEMPERATURE OF THE ELECTROLYTE NOT IN EXCESS OF ABOUT 200* F.
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) | 1959-05-22 | 1959-11-21 | 1960-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-22 | 1963-11-21 | 1964-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-22 | 1967-11-21 | 1968-05-22 | $7700.00 | Window Closed / Lapsed |