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:
Mar. 31, 1992
Filed:
Jun. 19, 1990
Applicant:
Inventors:
Fumio Obata, Kitakyusyu, JP;
Toshiaki Tanaka, Yukuhashi, JP;
Assignee:
501 Hitachi Metals, Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C22B / ;
U.S. Cl.
CPC ...
420 13 ; 420 18 ;
Abstract
Spheroidal graphite cast iron containing 0.016-0.030 weight % of S, in which the number of spheroidal graphite particles having a diameter of 2 .mu.m or more is such that it is 1700/mm.sup.2 or more when an as-cast iron portion measured has a thickness of 3 mm. This cast iron is produced by: