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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 11591681 B1

PDFFull Text
Date of Patent:
Feb. 28, 2023

Filed:

Aug. 30, 2016

Iron-based sintered body

Applicants:

Sumitomo Electric Industries, Ltd., Osaka, JP;

Sumitomo Electric Sintered Alloy, Ltd., Takahashi, JP;

Inventors:

Tomoyuki Ueno, Itami, JP;

Koji Yamada, Itami, JP;

Kazuya Takizawa, Takahashi, JP;

Yuki Adachi, Takahashi, JP;

Tetsuya Hayashi, Takahashi, JP;

Assignees:

Sumitomo Electric Industries, Ltd., Osaka, JP;

Sumitomo Electric Sintered Alloy, Ltd., Takahashi, JP;

Attorneys:

Baker Botts, L.L.P.

Michael A. Sartori

Primary Examiner:

Humera N Sheikh

Assistant Examiner:

Kevin C T Li

Int. Cl.
CPC ...
C22C 49/14 (2006.01); C22C 38/00 (2006.01); C22C 38/04 (2006.01); C22C 47/14 (2006.01); C22C 33/02 (2006.01); C22C 32/00 (2006.01);
U.S. Cl.
CPC ...
C22C 49/14 (2013.01); C22C 33/0228 (2013.01); C22C 38/00 (2013.01); C22C 38/002 (2013.01); C22C 38/04 (2013.01); C22C 47/14 (2013.01); C22C 32/0026 (2013.01);
Abstract

An iron-based sintered body includes a metal matrix and complex oxide particles contained in the metal matrix. When a main viewing field having an area of 176 μm×226 μm is taken on a cross section of the iron-based sintered body and divided into a 5×5 array of 25 viewing fields each having an area of 35.2 μm×45.2 μm, the complex oxide particles have an average equivalent circle diameter of from 0.3 μm to 2.5 μm inclusive, and a value obtained by dividing the total area of the 25 viewing fields by the total number of complex oxide particles present in the 25 viewing fields is from 10 μm/particle to 1,000 μm/particle inclusive. The number of viewing fields in which no complex oxide particle is present is 4 or less out of the 25 viewing fields.

Find Patent Forward Citations

Ueno, Tomoyuki. (2023). Iron-based sintered body (U.S. Patent No. 11591681). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/11591681

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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