US3993479A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copper base alloy
Assignee: Olin Corp
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Filing: 1975-08-04
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Granted: 1976-11-23
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Expires: 1995-08-04
Abstract
Abstract An improved copper base alloy having good high temperature properties, such as hot rollability, creep strength and stress rupture life. The alloy contains from about 2 to 9.5% aluminum, from about 0.001 to 3% silicon, and a grain refining element selected from the group consisting of iron from about 0.001 to 5%, chromium from about 0.001 to 1%, zirconium from about 0.001 to 1%, cobalt from about 0.001 to 5% and mixtures thereof. In addition, the alloy contains titanium in an amount from about 0.2 to 1%.
Inventors
- 👤 Harvey P. Cheskis
- 👤 Stanley Shapiro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:38
CPC Classifications
C; C22; C22C; C22C9/00; C22C9/01
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
75 words
A copper base alloy strip having improved stress rupture life and hot rollability consisting essentially of from about 2 to 9.5% aluminum, from about 0.001 to 3% silicon, from about 0.2 to 1% titanium, a grain refining element selected from the group consisting of iron from about 0.001 to 5.0%, chromium from about 0.001 to 1%, zirconium from about 0.001 to 1%, cobalt from about 0.001 to 5% and mixtures thereof, and the balance copper.
Claim 2
Dependent Claim
75 words
A copper base alloy strip having improved stress rupture life and hot rollability consisting essentially of from about 2 to 9.5% aluminum, from about 0.001 to 3% silicon, from about 0.2 to 1% titanium, a grain refining element selected from the group consisting of iron from about 0.001 to 5.0%, chromium from about 0.001 to 1%, zirconium from about 0.001 to 1%, cobalt from about 0.001 to 5% and mixtures thereof, and the balance copper.
Claim 3
Dependent Claim
13 words
An alloy according to claim 1 containing from about 2 to 5% aluminum.
Claim 4
Dependent Claim
13 words
An alloy according to claim 2 containing from about 1 to 3% silicon.
Claim 5
Dependent Claim
13 words
An alloy according to claim 3 containing from about 0.3 to 0.5% titanium.
Claim 6
Dependent Claim
13 words
An alloy according to claim 1 wherein the grain refining element is cobalt.
Claim 7
Dependent Claim
17 words
An alloy according to claim 1 wherein the minimum amount of said grain refining element is 0.1%.
Claim 8
Dependent Claim
12 words
An alloy according to claim 1 containing less than about 1% zinc.
Claim 9
Dependent Claim
11 words
An alloy according to claim 1 in the temper rolled condition.
Claim 10
Dependent Claim
38 words
An alloy according to claim 1 wherein the aluminum content is from 2.5 to 3.1%, the silicon content is from 1.5 to 2.1% and wherein the grain refining element is cobalt in an amount from 0.25 to 0.55%.
References Cited (Backward Citations)
US2270716A
Cited
GB672263A
Cited
US2907653A
Cited
US3297497A
Cited
US3416915A
Cited
US3366477A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-11-23 | 1980-05-24 | 1980-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-23 | 1984-05-24 | 1984-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-23 | 1988-05-24 | 1988-11-23 | $7700.00 | Window Closed / Lapsed |