Patent US3039898A successfully refreshed from Google Patents.
US3039898A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coating aluminum surfaces
Assignee: Alcoa Corp
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Filing: 1961-02-03
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Granted: 1962-06-19
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Expires: 1981-02-03
Abstract
No abstract record available.
Inventors
- 👤 Keller Fred
- 👤 Walter G Zelley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:16
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/05; C23C22/60; C23C22/66
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
THE METHOD OF PRODUCING AN OXIDE COARTING ALUMINUM SURFACE, COMPRISING IMMERSING AN ALUMINUM SURFACE, FOR AT LEAST ABOUT 1 MINUTE, IN A SOLUTION MAINTAINED AT A TEMPERATURE ABOVE ABOUT 152*F. AND CONSISTING ESSENTIALLY OF WATER AND AT LEAST ABOUT 0.5 GRAM PER LITER OF MAGNESIUM OXIDE, SAID MAGNESIUM OXIDE RENDERING THE SOLUTION ALKALINE WITHIN A PH RANGE OF APPROXIMATELY 8.5 TO 11, WHEREBY A CRYSTALLINE COATING COMPRISING HYDRATED MAGNESIUM OXIDE IS FORMED ON THE ALUMINUM SURFACE.
Claim 2
Independent Claim
76 words
THE METHOD OF PRODUCING AN OXIDE COARTING ALUMINUM SURFACE, COMPRISING IMMERSING AN ALUMINUM SURFACE, FOR AT LEAST ABOUT 1 MINUTE, IN A SOLUTION MAINTAINED AT A TEMPERATURE ABOVE ABOUT 152*F. AND CONSISTING ESSENTIALLY OF WATER AND AT LEAST ABOUT 0.5 GRAM PER LITER OF MAGNESIUM OXIDE, SAID MAGNESIUM OXIDE RENDERING THE SOLUTION ALKALINE WITHIN A PH RANGE OF APPROXIMATELY 8.5 TO 11, WHEREBY A CRYSTALLINE COATING COMPRISING HYDRATED MAGNESIUM OXIDE IS FORMED ON THE ALUMINUM SURFACE.
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) | 1965-06-18 | 1965-12-18 | 1966-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-06-18 | 1969-12-18 | 1970-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-06-18 | 1973-12-18 | 1974-06-19 | $7700.00 | Window Closed / Lapsed |