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. 31, 2019
Filed:
Jun. 20, 2013
Mitsui Mining & Smelting Co., Ltd., Tokyo, JP;
Yoichi Kamikoriyama, Saitama, JP;
Shigeki Nakayama, Saitama, JP;
MITSUI MINING & SMELTING CO., LTD., Tokyo, JP;
Abstract
Disclosed is copper powder having an average primary particle size D of 0.15 to 0.6 μm, having a ratio of D to D, D/D, of 0.8 to 4.0 wherein Dis a sphere-equivalent average particle diameter calculated from a BET specific surface area, and having no layer for preventing agglomeration on the surface thereof. The copper powder is suitably produced by a method which includes a step of mixing (1) hydrazine and (2) a reactant mixture including a monovalent or divalent copper source and a liquid medium which includes water and an organic solvent having water miscibility and capable of reducing the surface tension of water, to reduce the copper source to form copper particles.