Patent US3901692A successfully refreshed from Google Patents.
US3901692A
Expired / Lapsed
US
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Corrosion resistant copper alloy and the method of forming the alloy
Assignee: Individual
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Filing: 1973-03-15
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Granted: 1975-08-26
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Expires: 1993-03-15
Abstract
Abstract A corrosion resistant copper alloy having copper as its principal component and in addition containing 0.1 to 11 percent aluminum, 0.1 to 10 percent nickel, 0.001 to 1.0 percent boron, 0.01 to 6 percent iron, 0.01 to 10 percent manganese and, optionally, 0.01 to 5 percent cobalt. Also, a method for making the alloy in which manganese is added to a melt containing nickel, boron, iron, and copper in order to eliminate any gaseous oxygen, following which step the aluminum can be added.
Inventors
- 👤 Tsuneaki Mikawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:29
CPC Classifications
C; C22; C22C; C22C9/00; C22C9/06; C22C9/01
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
42 words
A COPPER ALLOY HAVING EXCELLENT CORROSION RESISTANCE CONSISTING ESSENTIALLY OF, BY WEIGHT: 6 TO 7% ALUMINUM 5 TO 7% NICKEL 0.08 TO 0.5% BORON 3 TO 4% IRON 5 TO 10% MANGANESE WITH REMAINDER BEING ESSENTIALLY COPPER CONTAINING LESS THAN 0.001% IMPURITIES.
Claim 2
Dependent Claim
42 words
A COPPER ALLOY HAVING EXCELLENT CORROSION RESISTANCE CONSISTING ESSENTIALLY OF, BY WEIGHT: 6 TO 7% ALUMINUM 5 TO 7% NICKEL 0.08 TO 0.5% BORON 3 TO 4% IRON 5 TO 10% MANGANESE WITH REMAINDER BEING ESSENTIALLY COPPER CONTAINING LESS THAN 0.001% IMPURITIES.
Claim 3
Dependent Claim
17 words
A copper alloy of claim 1 and further including between about 0.01 and 5 percent of cobalt.
Claim 4
Dependent Claim
19 words
A copper alloy of claim 1, wherein manganese is present in an amount of from 7 to 9 percent.
Claim 5
Dependent Claim
17 words
A copper alloy of claim 3, wherein manganese is present in an amount of about 8 percent.
References Cited (Backward Citations)
US1718502A
Cited
US2195433A
Cited
US2430419A
Cited
US2715577A
Cited
US2798826A
Cited
US2870051A
Cited
US3297437A
Cited
US3364016A
Cited
US3416915A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-25 | 1979-02-24 | 1979-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-25 | 1983-02-24 | 1983-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-25 | 1987-02-24 | 1987-08-26 | $7700.00 | Window Closed / Lapsed |