Patent US3149001A successfully refreshed from Google Patents.
US3149001A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Enameled aluminous metal product
Assignee: Alcoa Corp
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Filing: 1962-04-05
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Granted: 1964-09-15
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Expires: 1982-04-05
Abstract
No abstract record available.
Inventors
- 👤 Paul F Wallace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:27
CPC Classifications
C; C23; C23D; C23D5/00; C22; C22C; C22C21/00; C22C21/06; C22C21/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
A WROUGHT SOLUTION HEAT TREATED AND QUENCHED ALUMINOUS METAL ARTICLE HAVING AN ADHERENT SUBSTANTIALLY SPALL-FREE VITREOUS ENAMEL COATING THEREON, SAID ALUMINOUS METAL BEING COMPOSED OF AN ALLOY CONSISTING OF ALUMINUM, 0.1 TO 0.4% BY WEIGHT OF NICKEL, 0.3 TO 1.0% BY WEIGHT OF MAGNESIUM AND 1.0 TO 2.2% BY WEIGHT OF SILICON, SAID MAGNESIUM AND SILICON BEING PRESENT IN SUCH PROPORTIONS AS TO FORM 0.5 TO 1.6% OF THE INTERMETALLIC COMPOUND MG2SI WITH AT LEAST 0.8% SILICON IN EXCESS OF THAT REQUIRED TO COMBINE WITH THE MAGNESIUM, AND AND A MAXIMUM IMPURITY CONTENT OF 0.25% IRON, 0.03% EACH OF MANGANESE AND CHROMIUM, 0.05% ZINC AND 0.1% TITANIUM, SAID ARTICLE BEING CHARACTERIZED BY A HIGHER STRENGTH AND A GREATER RESISTANCE TO SPALLING OF THE ENAMEL COATING THAN THE SAME ARTICLE CONTAINING NO NICKEL IN THE ALLOY BASE AND LESS THAN 0.8% SILICON IN EXCESS OF THAT COMBINED WITH MAGNESIUM.
Claim 2
Dependent Claim
148 words
A WROUGHT SOLUTION HEAT TREATED AND QUENCHED ALUMINOUS METAL ARTICLE HAVING AN ADHERENT SUBSTANTIALLY SPALL-FREE VITREOUS ENAMEL COATING THEREON, SAID ALUMINOUS METAL BEING COMPOSED OF AN ALLOY CONSISTING OF ALUMINUM, 0.1 TO 0.4% BY WEIGHT OF NICKEL, 0.3 TO 1.0% BY WEIGHT OF MAGNESIUM AND 1.0 TO 2.2% BY WEIGHT OF SILICON, SAID MAGNESIUM AND SILICON BEING PRESENT IN SUCH PROPORTIONS AS TO FORM 0.5 TO 1.6% OF THE INTERMETALLIC COMPOUND MG2SI WITH AT LEAST 0.8% SILICON IN EXCESS OF THAT REQUIRED TO COMBINE WITH THE MAGNESIUM, AND AND A MAXIMUM IMPURITY CONTENT OF 0.25% IRON, 0.03% EACH OF MANGANESE AND CHROMIUM, 0.05% ZINC AND 0.1% TITANIUM, SAID ARTICLE BEING CHARACTERIZED BY A HIGHER STRENGTH AND A GREATER RESISTANCE TO SPALLING OF THE ENAMEL COATING THAN THE SAME ARTICLE CONTAINING NO NICKEL IN THE ALLOY BASE AND LESS THAN 0.8% SILICON IN EXCESS OF THAT COMBINED WITH MAGNESIUM.
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) | 1967-09-15 | 1968-03-16 | 1968-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-15 | 1972-03-16 | 1972-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-15 | 1976-03-16 | 1976-09-15 | $7700.00 | Window Closed / Lapsed |