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. 25, 1983
Filed:
Jul. 09, 1981
Applicant:
Inventors:
Rudolf Hirschberg, Bad Nenndorf, DE;
Bernd Schonfeld, Bad Nenndorf, DE;
Assignee:
Riedel-De Haen Aktiengesellschaft, Seelze/Hanover, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09C / ; C01G / ;
U.S. Cl.
CPC ...
51293 ; 51307 ; 423466 ; 423463 ;
Abstract
Chlorofluoroferrates(II,III) are manufactured by fusing alkali metal halides or ammonium halides with an iron(III) halide and metallic iron. The starting materials used are, in particular, (a) an alkali metal chloride or ammonium chloride, (b) an alkali metal fluoride or ammonium fluoride, (c) anhydrous iron(III) chloride and (d) iron powder. The reaction is carried out a temperature of 300.degree. to 900.degree. C. The chlorofluoroferrates, which have a markedly lower hygroscopicity compared with customary chloroferrates, are particularly suitable for use as active fillers for grinding wheels.