Patent US3418230A successfully refreshed from Google Patents.
US3418230A
Expired / Lapsed
US
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Galvanic anode and aluminum alloy therefor
Assignee: Alcoa Corp
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Filing: 1961-10-05
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Granted: 1968-12-24
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Expires: 1981-10-05
Abstract
No abstract record available.
Inventors
- 👤 Herbert C Rutemiller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:55
CPC Classifications
C; C23; C23F; C23F13/00; C23F13/02; C23F13/06; C23F13/08; C23F13/12; C23F13/14; C22; C22C; C22C21/00; C22C21/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
A GALVANIC ANODE IN THE NON-HEAT TREATED CONDITION COMPOSED OF AN ALUMINUM BASE ALLOY CONSISTING ESSENTIALLY OF ALUMINUM, 3.5% TO 9.0% BY WEIGHT OF ZINC AND 0.008% TO 0.05% BY WEIGHT OF INDIUM, THE TOTAL OF ALL IMPURITIES NOT BEING OVER 0.50%, SAID ANODE IN THE ASCAST OR AS-WORKED CONDITION BEING CHARACTERIZED BY A HIGHER CURRENT EFFICIENCY THAN THE SAME ANODE WITHOUT INDIUM.
Claim 2
Dependent Claim
63 words
A GALVANIC ANODE IN THE NON-HEAT TREATED CONDITION COMPOSED OF AN ALUMINUM BASE ALLOY CONSISTING ESSENTIALLY OF ALUMINUM, 3.5% TO 9.0% BY WEIGHT OF ZINC AND 0.008% TO 0.05% BY WEIGHT OF INDIUM, THE TOTAL OF ALL IMPURITIES NOT BEING OVER 0.50%, SAID ANODE IN THE ASCAST OR AS-WORKED CONDITION BEING CHARACTERIZED BY A HIGHER CURRENT EFFICIENCY THAN THE SAME ANODE WITHOUT INDIUM.
References Cited (Backward Citations)
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US2565544A
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US2913384A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-24 | 1972-06-24 | 1972-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-24 | 1976-06-24 | 1976-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-24 | 1980-06-24 | 1980-12-24 | $7700.00 | Window Closed / Lapsed |