Patent US4594221A successfully refreshed from Google Patents.
US4594221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multipurpose copper alloys with moderate conductivity and high strength
Assignee: Olin Corp
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Filing: 1985-04-26
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Granted: 1986-06-10
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Expires: 2005-04-26
Abstract
Abstract A multipurpose copper base alloy having an improved combination of ultimate tensile strength and electrical conductivity. The alloy can be tailored for applications such as in connectors or leadframes by processing. The alloy may be processed to provide improved bead formability at some sacrifice in strength. The alloy in the stabilized condition shows surprising improvement in stress relaxation resistance. The alloy comprises a Cu-Ni-Si alloy to which about 0.05 to about 0.45% by weight magnesium is added.
Inventors
- 👤 Ronald N. Caron
- 👤 John F. Breedis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:01
CPC Classifications
C; C22; C22C; C22C9/00; C22C9/06; H; H10; H10W; H10W70/00; H10W70/40; H10W70/456
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
49 words
A copper base alloy having an improved combination of ultimate tensile strength and electrical conductivity consisting essentially of from about 2 to about 4.8% by weight nickel, from about 0.2 to about 1.4% by weight silicon, from about 0.05 to about 0.45% by weight magnesium and the balance copper.
Claim 2
Dependent Claim
49 words
A copper base alloy having an improved combination of ultimate tensile strength and electrical conductivity consisting essentially of from about 2 to about 4.8% by weight nickel, from about 0.2 to about 1.4% by weight silicon, from about 0.05 to about 0.45% by weight magnesium and the balance copper.
Claim 3
Dependent Claim
42 words
A copper base alloy as in claim 1 consisting essentially of from about 2.4 to about 4.0% by weight nickel, from about 0.3 to about 1.1% by weight silicon, from about 0.05 to about 0.3% by weight magnesium and the balance copper.
Claim 4
Dependent Claim
24 words
A copper base alloy as in claim 1 comprising a leadframe having good bend formability and wherein said alloy is in an overaged condition.
Claim 5
Dependent Claim
29 words
A copper base alloy as in claim 1 wherein said alloy comprises an electrical connector having good stress relaxation properties and wherein said alloy is in a stabilized condition.
Claim 6
Dependent Claim
25 words
A copper base alloy as in claim 1 wherein the ratio of nickel to silicon in said alloy ranges from about 3.5:1 to about 4.5:1.
Claim 7
Dependent Claim
18 words
A copper base alloy as in claim 5 wherein said ratio ranges from about 3.8:1 to about 4.3:1.
Claim 8
Dependent Claim
24 words
A copper base alloy as in claim 2 comprising a leadframe having good bend formability and wherein said alloy is in an overaged condition.
Claim 9
Dependent Claim
29 words
A copper base alloy as in claim 2 wherein said alloy comprises an electrical connector having good stress relaxation properties and wherein said alloy is in a stabilized condition.
Claim 10
Dependent Claim
60 words
A copper base alloy as in claim 2 further including an effective amount up to about 1% by weight of a silicide forming element selected from the group consisting of chromium, cobalt, iron, titanium, zirconium, hafnium, niobium, tantalum, mischmetal and mixtures thereof and wherein the nickel content of said alloy is reduced by the amount of said silicide forming element.
Claim 11
Dependent Claim
36 words
A copper base alloy as in claim 9 further including an effective amount up to about 0.25% of a deoxidizing or desulfurizing element selected from the group consisting of lithium, calcium, manganese, mischmetal and mixtures thereof.
Claim 12
Dependent Claim
21 words
A copper base alloy as in claim 9 wherein when chromium is present it does not exceed about 0.1% by weight.
Claim 13
Dependent Claim
19 words
A copper base alloy as in claim 1 having improved bend formability, said alloy being in an overaged condition.
Claim 14
Dependent Claim
20 words
A copper base alloy as in claim 1 having improved stress relaxation resistance, said alloy being in a stabilized condition.
Claim 15
Dependent Claim
19 words
A copper base alloy as in claim 2 having improved bend formability, said alloy being in an overaged condition.
Claim 16
Dependent Claim
20 words
A copper base alloy as in claim 2 having improved stress relaxation resistance, said alloy being in a stabilized condition.
Claim 17
Dependent Claim
20 words
A copper base alloy as in claim 2 wherein said magnesium is from about 0.1 to about 0.2% by weight.
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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) | 1989-06-09 | 1989-12-09 | 1990-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-09 | 1993-12-09 | 1994-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-09 | 1997-12-09 | 1998-06-10 | $7700.00 | Window Closed / Lapsed |