US3721535A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite copper alloy
Assignee: Olin Corp
•
Filing: 1971-01-25
•
Granted: 1973-03-20
•
Expires: 1991-01-25
Abstract
Abstract The disclosure teaches a novel, composite copper alloy having good stress corrosion resistance. The composite has a copper alloy core containing from 2 to 12 percent by weight aluminum, balance essentially copper, clad with copper or a high copper alloy containing at last 95 percent copper.
Inventors
- 👤 M Pryor
- 👤 R Procter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:59
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/01; C; C22; C22C; C22C9/00; C22C9/01; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/923; Y10S428/924; Y10S428/925; Y10S428/9335; Y10S428/934; Y10S428/935; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12771; Y10T428/12861; Y10T428/12903; Y10T428/1291
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
33 words
A composite according to claim 1 wherein said cladding is clad on both sides of the core, with each cladding layer representing from 2 to 20 percent of the thickness of the composite.
Claim 2
Dependent Claim
56 words
A composite according to claim 1 wherein the core contains at least one material selected from the group consisting of zinc up to 30 percent, cobalt up to 2 percent, iron up to 5 percent, manganese up to 15 percent, silicon up to 3 percent, nickel up to 10 percent, and arsenic up to 0.5 percent.
Claim 3
Dependent Claim
58 words
A composite according to claim 1 wherein the cladding contains at least one material selected from the group consisting of silver up to 1 percent, cadmium up to 1.5 percent, chromium up to 1.5 percent, iron up to 3 percent, zirconium up to 1 percent and phosphorus up to 0.2 percent, others in total less than 1 percent.
Claim 4
Dependent Claim
64 words
A composite according to claim 4 wherein said cladding is clad on both sides of the core, with each cladding layer representing from 2 to 20 percent of the thickness of the composite and wherein said core contains at least one material selected from the group consisting of zinc up to 30 percent, cobalt up to 2 percent and silicon up to 3 percent.
Claim 5
Dependent Claim
14 words
A composite according to claim 2 wherein said cladding is electrolytic tough pitch copper.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-19 | 1976-09-18 | 1977-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-19 | 1980-09-18 | 1981-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-19 | 1984-09-18 | 1985-03-20 | $7700.00 | Window Closed / Lapsed |