US3976477A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High conductivity high temperature copper alloy
Assignee: Olin Corp
•
Filing: 1974-12-23
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Granted: 1976-08-24
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Expires: 1994-12-23
Abstract
Abstract A high conductivity high temperature copper alloy containing mischmetal and phosphorus in a specific ratio. The alloy is free from internal copper oxides and is suitable for applications requiring stability at elevated temperatures. Strengths on the order of 70 KSI and conductivities on the order of 90% IACS are obtainable in cold worked material.
Inventors
- 👤 Jacob Crane
- 👤 Eugene Shapiro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:02
CPC Classifications
C; C22; C22C; C22C9/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
72 words
A heat treated copper base alloy possessing high conductivity which consists, in weight percent, essentially of: from about 0.03 to about 0.5% of an element, selected from the group consisting of the lanthanide series and mixtures thereof, and from about 0.01 to about 0.1% of phosphorus, balance copper, the lanthanide and phosphorus being added in substantially stoichiometric ratio or proportions and further characterized by being substantially free of low melting point eutectics.
Claim 2
Dependent Claim
72 words
A heat treated copper base alloy possessing high conductivity which consists, in weight percent, essentially of: from about 0.03 to about 0.5% of an element, selected from the group consisting of the lanthanide series and mixtures thereof, and from about 0.01 to about 0.1% of phosphorus, balance copper, the lanthanide and phosphorus being added in substantially stoichiometric ratio or proportions and further characterized by being substantially free of low melting point eutectics.
Claim 3
Dependent Claim
12 words
The alloy of claim 1 wherein said element consists essentially of mischmetal.
Claim 4
Dependent Claim
10 words
The alloy of claim 1 wherein said element comprises cerium.
Claim 5
Dependent Claim
32 words
The alloy of claim 1 wherein said element consists essentially of from about 0.05 to about 0.4% and said phosphorus is present in an amount ranging from about 0.02 to about 0.1%.
Claim 6
Dependent Claim
15 words
The alloy of claim 1 wherein said alloy contains precipitate particles of the compound CeP.
Claim 7
Dependent Claim
25 words
The alloy of claim 1 wherein the amount of said element present does not exceed the amount determined by said ratio by more than 0.05%.
Claim 8
Dependent Claim
12 words
The alloy of claim 6 wherein said stoichiometric ratio is about 4.52:1.
References Cited (Backward Citations)
SU279320A1
Cited
DE192124C
Cited
US2066512A
Cited
US2123628A
Cited
US2357190A
Cited
US2802733A
Cited
US2795501A
Cited
SU206095A1
Cited
US3253910A
Cited
US3525605A
Cited
US3677745A
Cited
US3738827A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-08-24 | 1980-02-23 | 1980-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-24 | 1984-02-23 | 1984-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-24 | 1988-02-23 | 1988-08-24 | $7700.00 | Window Closed / Lapsed |