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. 19, 1993
Filed:
Apr. 12, 1991
Isao Nakatani, Tokyo, JP;
Kiyosho Ozawa, Tokyo, JP;
Masayuki Hijikata, Tokyo, JP;
Tsutomu Takahashi, Tokyo, JP;
National Research Institute for Metals, Tokyo, JP;
Abstract
A method of manufacturing a fine-particle colloid or a magnetic fluid of a metal nitride through reaction between a metal carbonyl and a nitride-bearing compound, a two-step reaction is performed, comprising a first-step reaction of synthesizing a nitrogen-bearing metal carbonyl which is a precursor substance and a second-step reaction of synthesizing metal nitride from said precursor substance. A step of eliminating unreacted metal carbonyl is provided between the two-step reaction. By repeatedly causing the series of reactions, a fine-particle colloid or a magnetic fluid of the metal nitride is manufactured. For the magnetic fluid, the solvent may be replaced in response to a particular purpose of use of application after production.