US4141725A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aluminum alloy for galvanic anode
Assignee: Nihon Boshoku Kogy KK
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Filing: 1977-12-14
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Granted: 1979-02-27
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Expires: 1997-12-14
Abstract
Abstract An aluminum alloy for a galvanic anode with improved anode potential and anode current efficiency, which consists of, in weight percentage: Zinc from 0.5 to 10.0%, Indium from 0.005 to 0.050%, Calcium from 0.005 to 0.500%, Magnesium from 0.1 to 4.0%, and The balance aluminum and incidental impurities; Said alloy including an aluminum alloy for a galvanic anode further additionally containing at least one rare earth element of from 0.001 to 0.050% in weight percentage.
Inventors
- 👤 Tohsuke Murai
- 👤 Yuichi Tamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 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: 6
Claim 1
Independent Claim
39 words
An aluminum alloy for a galvanic anode which consists of, in weight percentage: Zinc from 0.5 to 10.0%, Indium from 0.005 to 0.050% Calcium from 0.005 to 0.500%, magnesium from 0.1 to 4.0%, and the balance aluminum and impurities.
Claim 2
Dependent Claim
39 words
An aluminum alloy for a galvanic anode which consists of, in weight percentage: Zinc from 0.5 to 10.0%, Indium from 0.005 to 0.050% Calcium from 0.005 to 0.500%, magnesium from 0.1 to 4.0%, and the balance aluminum and impurities.
Claim 3
Dependent Claim
49 words
An aluminum alloy for a galvanic anode which consists of, in weight percentage: Zinc from 0.5 to 10.0%, Indium from 0.005 to 0.050%, Calcium from 0.005 to 0.500%, Magnesium from 0.1 to 4.0%, at least one rare earth element from 0.001 to 0.050%, and the balance aluminum and impurities.
Claim 4
Dependent Claim
49 words
An aluminum alloy for a galvanic anode which consists of, in weight percentage: Zinc from 0.5 to 10.0%, Indium from 0.005 to 0.050%, Calcium from 0.005 to 0.500%, Magnesium from 0.1 to 4.0%, at least one rare earth element from 0.001 to 0.050%, and the balance aluminum and impurities.
Claim 5
Dependent Claim
22 words
An aluminum alloy of claim 1 consisting of Zinc 4.5%, Indium 0.02%, Calcium 0.02%, Magnesium 2.0%, and the balance aluminum and impurities.
Claim 6
Dependent Claim
29 words
An aluminum alloy of claim 2 consisting of Zinc 4.5%, Indium 0.02%, Calcium 0.01% Magnesium 2.0%, rare earth metal in misch metal 0.01%, and the balance aluminum and impurities.
References Cited (Backward Citations)
US3694196A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-02-26 | 1982-08-28 | 1983-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-26 | 1986-08-28 | 1987-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-26 | 1990-08-28 | 1991-02-27 | $7700.00 | Window Closed / Lapsed |