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:
Dec. 12, 2017
Filed:
Jul. 31, 2012
Beum Jae Lee, Ulsan, KR;
Won Hone Kim, Ulsan, KR;
Cheol Min Park, Daejeon, KR;
Young Re Cho, Ulsan, KR;
Min Jae Jeong, Ulsan, KR;
Beum Jae Lee, Ulsan, KR;
Won Hone Kim, Ulsan, KR;
Cheol Min Park, Daejeon, KR;
Young Re Cho, Ulsan, KR;
Min Jae Jeong, Ulsan, KR;
POONGSAN CORPORATION, Pyeongtaek-si, KR;
Abstract
Disclosed is a leadless free-cutting copper alloy that exhibits superior machinability, cold workability and dezincification resistance and a method for producing the same. The leadless free-cutting copper alloy comprises 56 to 77% by weight of copper (Cu), 0.1 to 3.0% by weight of manganese (Mn), 1.5 to 3.5% by weight of silicon (Si), and the balance of zinc (Zn) and other inevitable impurities, thus exhibiting superior eco-friendliness, machinability, cold workability and dezincification resistance.