US4801328A
Expired / Lapsed
US
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Deoxidizing agent
Assignee: Individual
•
Filing: 1987-12-31
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Granted: 1989-01-31
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Expires: 2007-12-31
Abstract
Abstract The present invention discloses an agent for the deoxidation of ferrous melts, generally comprising a discrete layer of aluminum surrounding a ferrous core, and a method of deoxidation of ferrous melts utilizing the agent of the invention to provide an improved aluminum deoxidation efficiency. The agent of the invention is also useful as an alloying agent for the addition of aluminum to a ferrous melt for the purpose of producing a ferrous-aluminum alloy.
Inventors
- 👤 Glenn Canfield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:37
CPC Classifications
C; C22; C22C; C22C35/00; C22C35/005; C21; C21C; C21C7/00; C21C7/04; C21C7/06
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
46 words
A deoxidizing agent for molten ferrous metals comprising: a core of material being chemically non-reactive with the ferrous metal to be deoxidized and having a density greater than the density of metallic aluminum; and one or more discrete layers of metallic aluminum substantially surrounding said core.
Claim 2
Dependent Claim
46 words
A deoxidizing agent for molten ferrous metals comprising: a core of material being chemically non-reactive with the ferrous metal to be deoxidized and having a density greater than the density of metallic aluminum; and one or more discrete layers of metallic aluminum substantially surrounding said core.
Claim 3
Dependent Claim
24 words
The deoxidizing agent of claim 1, wherein the material of said core has a density greater than or equal to the density of iron.
Claim 4
Dependent Claim
16 words
The deoxidizing agent of claim 1, wherein the material of said core is a ferrous metal.
Claim 5
Dependent Claim
30 words
The deoxidizing agent of claim 1, wherein said metallic aluminum of said one or more discrete layers of metallic aluminum consists of not less than about ninety-five percent pure aluminum.
Claim 6
Dependent Claim
39 words
The deoxidizing agent of claim 1, wherein the material of said core is a ferrous metal and the proportion of metallic aluminum comprising said deoxidizing agent is between about thirty percent by weight and about fifty percent by weight.
Claim 7
Dependent Claim
74 words
A deoxidizing agent for molten ferrous metals comprising: a core of material consisting essentially of iron and being chemically non-reactive with the molten ferrous metal to be deoxidized; and a discrete layer of metallic aluminum disposed at least partially around the outer surface of said core and interconnected thereto so as to maintain the interconnection between said layer of metallic aluminum and said core upon immersion of the deoxidizing agent in molten ferrous metal.
Claim 8
Dependent Claim
74 words
A deoxidizing agent for molten ferrous metals comprising: a core of material consisting essentially of iron and being chemically non-reactive with the molten ferrous metal to be deoxidized; and a discrete layer of metallic aluminum disposed at least partially around the outer surface of said core and interconnected thereto so as to maintain the interconnection between said layer of metallic aluminum and said core upon immersion of the deoxidizing agent in molten ferrous metal.
Claim 9
Dependent Claim
22 words
The deoxidizing agent of claim 6, wherein said layer of metallic aluminum consists of not less than about ninety percent pure aluminum.
Claim 10
Dependent Claim
22 words
The deoxidizing agent of claim 6, wherein said layer of metallic aluminum consists of not less than about ninety-five percent pure aluminum.
Claim 11
Dependent Claim
18 words
The deoxidizing agent of claim 6, wherein said core consists of not less than about ninety percent iron.
Claim 12
Dependent Claim
18 words
The deoxidizing agent of claim 6, wherein said core consists of not less than about ninety-five percent iron.
Claim 13
Dependent Claim
28 words
The deoxidizing agent of claim 6, wherein the proportion of aluminum comprising said deoxidizing agent is between about ten percent by weight and about seventy-five percent by weight.
Claim 14
Dependent Claim
28 words
The deoxidizing agent of claim 6, wherein the proportion of aluminum comprising said deoxidizing agent is between about thirty percent by weight and about fifty percent by weight.
Claim 15
Dependent Claim
43 words
In a process of producing a deoxidizing agent consisting essentially of iron and aluminum for the deoxidizing of molten ferrous metals, the improvement comprising interconnecting a discrete layer consisting essentially of metallic aluminum on the exterior of a core consisting essentially of iron.
Claim 16
Dependent Claim
43 words
In a process of producing a deoxidizing agent consisting essentially of iron and aluminum for the deoxidizing of molten ferrous metals, the improvement comprising interconnecting a discrete layer consisting essentially of metallic aluminum on the exterior of a core consisting essentially of iron.
Claim 17
Dependent Claim
78 words
An alloying agent for introducing aluminum to molten ferrous metal for the purpose of producing a ferrous metal alloy containing aluminum, comprising: a core of material being chemically nonreactive with the ferrous metal to which such alloying agent is to be introduced and with the ferrous metal alloy to be produced and having a density greater than the density of aluminum; and a discrete layer of metallic aluminum disposed on the surface of said core and interconnected thereto.
Claim 18
Dependent Claim
78 words
An alloying agent for introducing aluminum to molten ferrous metal for the purpose of producing a ferrous metal alloy containing aluminum, comprising: a core of material being chemically nonreactive with the ferrous metal to which such alloying agent is to be introduced and with the ferrous metal alloy to be produced and having a density greater than the density of aluminum; and a discrete layer of metallic aluminum disposed on the surface of said core and interconnected thereto.
Claim 19
Dependent Claim
13 words
The alloying agent of claim 14, wherein said core consists essentially of iron.
Claim 20
Dependent Claim
20 words
The alloying agent of claim 14, wherein said metallic aluminum consists of not less than about ninety-five percent pure aluminum.
References Cited (Backward Citations)
US2397418A
Cited
US3915693A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-01-31 | 1992-08-01 | 1993-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-31 | 1996-08-01 | 1997-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-31 | 2000-08-01 | 2001-01-31 | $7700.00 | Window Closed / Lapsed |