US Patent 7270718 Method for manufacturing a soft magnetic powder material
Patent 7270718 was granted and assigned to Denso on September, 2007 by the United States Patent and Trademark Office.
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Patent abstract
The invention provides a method for manufacturing a soft magnetic powder material covered by oxide layers at surfaces of the powder, by using a soft magnetic alloy powder containing a soft magnetic powder material and a second element such as Si having an oxidizing reactivity higher than iron, and heating the soft magnetic alloy powder in an atmosphere of a weak oxidizing gas by mixing a weak oxidizing gas in an inert gas, and oxidizing selectively the second element at surface layers of the powder while restraining an oxidation of iron to form thin oxide layers with high electrical resistance.
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Current Assignee
Patent Jurisdiction
Patent Number
72707180
Date of Patent
September 18, 2007
0Patent Application Number
109935020
Date Filed
November 19, 2004
0Patent Primary Examiner
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US Patent 07270718 Method for manufacturing a soft magnetic powder material US Patent 7270718 Method for manufacturing a soft magnetic powder material
Infobox
Patent Number
0727071800
Patent Number
727071800
Edits on 3 Apr, 2023
Golden AI
Infobox
Is a
Current Assignee
Patent Jurisdiction
Patent Number
072707180
Date of Patent
September 18, 2007
0Patent Application Number
109935020
Date Filed
November 19, 2004
0Official Website
Patent Primary Examiner
Edits on 22 Sep, 2022
Golden AI
Infobox
Is a
Current Assignee
Patent Jurisdiction
Patent Number
072707180
Date of Patent
September 18, 2007
0Patent Application Number
109935020
Date Filed
November 19, 2004
0Official Website
Patent Primary Examiner
Edits on 17 Jun, 2022
Golden AI
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US Patent 07270718 Method for manufacturing a soft magnetic powder material
Infobox
Is a
Current assignee
Patent jurisdiction
Patent number
07270718
Date of patent
September 18, 2007
Patent application number
10993502
Date Filed
November 19, 2004
Patent primary examiner
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