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.:
Date of Patent:
Oct. 13, 2026
Filed:
Mar. 05, 2021
Applicant:
Kuwana Metals, Ltd., Kuwana, JP;
Inventor:
Ryo Goto, Tokyo, JP;
Assignee:
Kuwana Metals, Ltd., Kuwana, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C22C 37/10 (2006.01); C21D 5/14 (2006.01); C22C 33/08 (2006.01);
U.S. Cl.
CPC ...
C22C 37/10 (2013.01); C21D 5/14 (2013.01); C22C 33/08 (2013.01); C21D 2211/005 (2013.01); C21D 2211/006 (2013.01);
Abstract
The black heart malleable cast iron according to the present embodiment comprises a matrix of ferrite and lump graphite included in the matrix, the black heart malleable cast iron comprising 50 ppm or more and 100 ppm or less of boron, and 65 ppm or more and 200 ppm or less of nitrogen in a mass ratio, wherein a grain size of the matrix is 8.0 or more and 10.0 or less in terms of grain size number, numerically determined by comparison between a metallographic photograph and a standard grain size chart.
Quick Actions:
Goto, Ryo. (2026). Black heart malleable cast iron and method for producing same (U.S. Patent No. 12760395). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12760395
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile