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:
Jan. 13, 2026
Filed:
Aug. 18, 2023
Applicant:
Proterial, Ltd., Tokyo, JP;
Inventor:
Lin Wang, Moka, JP;
Assignee:
PROTERIAL, LTD., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C22C 37/04 (2006.01); C21C 1/10 (2006.01); C22C 33/10 (2006.01); C22C 37/10 (2006.01);
U.S. Cl.
CPC ...
C22C 37/04 (2013.01); C21C 1/10 (2013.01); C22C 33/10 (2013.01); C22C 37/10 (2013.01);
Abstract
A spheroidal graphite cast iron meeting N≥250, N/N≥0.6, and N/N≤0.2, wherein Nrepresents the number (/mm) of graphite particles having equivalent-circle diameters of 5 μm or more, Nrepresents the number (/mm) of graphite particles having equivalent-circle diameters of 5 μm or more and less than 20 μm, and Nrepresents the number (/mm) of graphite particles having equivalent-circle diameters of 30 μm or more, among graphite particles observed in an arbitrary cross section of at least 1 mm.