Patent US4533388A successfully refreshed from Google Patents.
US4533388A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Technique for removing iron-rich components from a copper melt
Assignee: Olin Corp
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Filing: 1984-04-11
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Granted: 1985-08-06
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Expires: 2004-04-11
Abstract
Abstract A copper or copper alloy material having a reduced number of stringer defects is formed by removing iron-containing components from the material with a member having exposed silicon carbide particles while the material is in a molten state. The member may be a bed filter formed from bed media having exposed silicon carbide particles, a porous body formed from a slurry containing silicon carbide, a porous body having at least one melt contacting surface coated with a silicon carbide material, and/or a furnace or passageway lining having at least one melt contacting surface coated with a silicon carbide material.
Inventors
- 👤 Derek E. Tyler
- 👤 Harvey P. Cheskis
- 👤 Paul D. Tungatt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:56
CPC Classifications
C; C22; C22B; C22B15/00; C22B15/0026; C22B15/006; C22B9/00; C22B9/02; C22B9/023; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
81 words
A process for reducing the number of iron containing defects in a solid copper or copper base alloy comprising: providing a copper or copper base alloy melt including iron containing components which result in defects in the solid alloy formed from said melt; and substantially reducing the number of said defects in said solid alloy by providing contact between said melt and a silicon carbide containing material so that the silicon carbide captures defect forming iron containing components in said melt.
Claim 2
Dependent Claim
81 words
A process for reducing the number of iron containing defects in a solid copper or copper base alloy comprising: providing a copper or copper base alloy melt including iron containing components which result in defects in the solid alloy formed from said melt; and substantially reducing the number of said defects in said solid alloy by providing contact between said melt and a silicon carbide containing material so that the silicon carbide captures defect forming iron containing components in said melt.
Claim 3
Dependent Claim
25 words
The process of claim 1 wherein said contact providing step comprises: at least partially immersing said material in said melt to capture said iron-containing components.
Claim 4
Dependent Claim
34 words
The process of claim 1 further comprising: forming a bed filter from said material, said material having exposed silicon carbide particles; and said contact providing step comprising flowing said melt through said bed filter.
Claim 5
Dependent Claim
22 words
The process of claim 3 further comprising: positioning said bed filter between two porous structures to maintain said bed filter in position.
Claim 6
Dependent Claim
19 words
The process of claim 4 wherein said positioning step comprises: positioning said bed filter between two open-pore ceramic plates.
Claim 7
Dependent Claim
30 words
The process of claim 1 further comprising: forming said silicon carbide containing material into a porous body; and said contact providing step comprising flowing said melt through said porous body.
Claim 8
Dependent Claim
39 words
The process of claim 6 wherein said forming step comprises: forming said porous body from a slurry containing silicon carbide and at least one other material selected from the group consisting of a refractory material and a ceramic material.
Claim 9
Dependent Claim
36 words
The process of claim 1 further comprising: providing a body having at least one surface with said silicon carbide containing material; and said contact providing step comprising contacting said at least one surface with said melt.
Claim 10
Dependent Claim
39 words
The process of claim 1 further comprising: providing a body having a porous core material and at least one surface coated with said silicon carbide containing material; and said contact providing step comprising passing said melt through said body.
Claim 11
Dependent Claim
25 words
The process of claim 1 further comprising: agitating said melt to increase the amount of contact between said melt and said silicon carbide containing material.
Claim 12
Dependent Claim
15 words
The process of claim 1 further comprising: casting said melt to form a desired product.
Claim 13
Dependent Claim
16 words
The process of claim 11 further comprising: working said cast product to form a strip material.
Claim 14
Dependent Claim
18 words
The process of claim 1 wherein said contact providing step comprises: removing iron-rich liquid droplets from said melt.
Claim 15
Dependent Claim
18 words
The process of claim 1 wherein said contact providing step comprises: removing iron-rich solid particles from said melt.
Claim 16
Dependent Claim
8 words
The product of the process of claim 1.
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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) | 1988-08-05 | 1989-02-04 | 1989-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-05 | 1993-02-04 | 1993-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-05 | 1997-02-04 | 1997-08-06 | $7700.00 | Window Closed / Lapsed |