US2692852A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing hard, abrasionresistant coatings on aluminum and aluminum alloys
Assignee: Alcoa Corp
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Filing: 1952-02-09
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Granted: 1954-10-26
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Expires: 1972-02-09
Abstract
No abstract record available.
Inventors
- 👤 Charles F Burrows
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:31
CPC Classifications
C; C25; C25D; C25D11/00; C25D11/02; C25D11/04; C25D11/06; C25D11/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
A METHOD OF FORMING A HARD, ABRASION-RESISTANT ANODIC COATING ON A PREDOMINANTLY ALUMINUM SURFACE BY SUBJECTING IT TO ANODIC OXIDATION WHILE IN CONTACT WITH AN AQUEOUS ACIDIC COATING-FORMING ELECTROLYTE MAINTAINED AT A TEMPERATURE BELOW 40* F. BUT ABOVE THE FREEZING POINT OF THE ELECTROLYTE, SAID ELECTROLYTE BEING AT LEAST SUBSTANTIALLY SATURATED WITH CO2 DURING THE ENTIRE COATING OPERATION.
Claim 2
Independent Claim
58 words
A METHOD OF FORMING A HARD, ABRASION-RESISTANT ANODIC COATING ON A PREDOMINANTLY ALUMINUM SURFACE BY SUBJECTING IT TO ANODIC OXIDATION WHILE IN CONTACT WITH AN AQUEOUS ACIDIC COATING-FORMING ELECTROLYTE MAINTAINED AT A TEMPERATURE BELOW 40* F. BUT ABOVE THE FREEZING POINT OF THE ELECTROLYTE, SAID ELECTROLYTE BEING AT LEAST SUBSTANTIALLY SATURATED WITH CO2 DURING THE ENTIRE COATING OPERATION.
References Cited (Backward Citations)
US1891703A
Cited
US2541083A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-10-25 | 1958-04-26 | 1958-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-10-25 | 1962-04-26 | 1962-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-10-25 | 1966-04-26 | 1966-10-26 | $7700.00 | Window Closed / Lapsed |