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. 05, 2000
Filed:
Oct. 16, 1995
Charles P Gibson, Oshkosh, WI (US);
Other;
Abstract
There is disclosed a method of making unsupported particles of a base metal selected from the group consisting of iron, cobalt, and nickel, which comprises combining an aqueous solution or suspension of a base metal salt, a strong base so that the resulting combination has an effective hydroxide ion concentration, and a reducing agent, which is then subjected to an autocatalytic reaction at about atmospheric pressure to form a precipitate of the metal. The unsupported base metal particles exhibit an anisometric morphology, generally platetlet or disk-shaped, and have a relatively high aspect or width to thickness ratio, which is preferably three or greater, exhibit ferromagnetic properties, and one or more of these base metals may be formed to exhibit a single magnetic domain. The resulting precipitate of metal particles may be formed as an agglomerate as by subjecting the precipitate to aging or to external means.