US2788292A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of treating chromium surfaces
Assignee: Autoyre Co Inc
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Filing: 1955-11-28
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Granted: 1957-04-09
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Expires: 1975-11-28
Abstract
No abstract record available.
Inventors
- 👤 William C Giesker
- 👤 Richard K Britton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:12
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/05; C23C22/06; C23C22/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 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 IMMERSING THE ARTICLE IN A SOLUTION CONTAINING HEXAVALENT CHROMIUM UNTIL A COATING OF CHROMIUM COMPOUND IS FORMED THEREON.
Claim 2
Independent Claim
71 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 IMMERSING THE ARTICLE IN A SOLUTION CONTAINING HEXAVALENT CHROMIUM UNTIL A COATING OF CHROMIUM COMPOUND IS FORMED THEREON.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-08 | 1960-10-08 | 1961-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-08 | 1964-10-08 | 1965-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-08 | 1968-10-08 | 1969-04-09 | $7700.00 | Window Closed / Lapsed |