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US4338130A
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US
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Precipitation hardening copper alloys
Assignee: Individual
•
Filing: 1980-11-20
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Granted: 1982-07-06
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Expires: 2000-11-20
Abstract
Abstract A precipitation and dispersion hardening copper alloy is disclosed which combines useful properties of high tensile and yield strength, proportional limit, modulus of elasticity, ductility and formability, corrosion resistance, and electrical conductivity. The copper alloy consists of 2 to 9% nickel, 0.05 to 2% each of silicon, chromium and aluminum, and balance copper.
Inventors
- 👤 Richard A. Burkett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:28
CPC Classifications
C; C22; C22C; C22C9/00; C22C9/06
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
31 words
A precipitation hardenable copper alloy consisting of 2 to 9 weight percent nickel, between 0.05 and 2 weight percent each of aluminum, and silicon, 0.18 to 0.50 chromium and balance copper.
Claim 2
Dependent Claim
31 words
A precipitation hardenable copper alloy consisting of 2 to 9 weight percent nickel, between 0.05 and 2 weight percent each of aluminum, and silicon, 0.18 to 0.50 chromium and balance copper.
Claim 3
Dependent Claim
25 words
A precipitation hardenable copper alloy according to claim 1 in which the total amount of aluminum, chromium and silicon do not exceed 2 weight percent.
Claim 4
Dependent Claim
18 words
A precipitation hardenable copper alloy according to claim 1 in which the conductivity is at least 14% I.A.C.S.
Claim 5
Dependent Claim
21 words
A precipitation hardenable copper alloy according to claim 1 in which the ultimate tensile strength is in excess of 90,000 psi.
Claim 6
Dependent Claim
52 words
A precipitation hardenable copper alloy having an ultimate tensile strength of at least 90,000 psi and a conductivity of at least 14% I.A.C.S. consisting of: 2 to 9% by weight nickel. 0.05 to 2% by weight aluminum 0.18 to 0.50% by weight chromium 0.05 to 2% by weight silicon, and balance copper.
Claim 7
Dependent Claim
52 words
A precipitation hardenable copper alloy having an ultimate tensile strength of at least 90,000 psi and a conductivity of at least 14% I.A.C.S. consisting of: 2 to 9% by weight nickel. 0.05 to 2% by weight aluminum 0.18 to 0.50% by weight chromium 0.05 to 2% by weight silicon, and balance copper.
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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) | 1985-07-05 | 1986-01-04 | 1986-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-07-05 | 1990-01-04 | 1990-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-07-05 | 1994-01-04 | 1994-07-06 | $7700.00 | Window Closed / Lapsed |