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:
Mar. 30, 1993
Filed:
Sep. 19, 1991
Applicant:
Inventor:
Wilma M Dausch, Limburgerhof, DE;
Assignee:
BASF Aktiengesellschaft, Ludwigshafen, DE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C04B / ;
U.S. Cl.
CPC ...
106429 ; 106419 ; 106425 ;
Abstract
Metal oxide-doped zinc oxide pigments are produced by processing an oxide, carbonate, hydroxide of hydroxycarbonate of zinc in the presence of water and an oxide, carbonate, hydroxide, hydroxy-carbonate, oxalate or formate of the doping metal into a paste using formic acid or oxalic acid in an amount which is at least sufficient for converting the oxides, carbonates, hydroxides or hydroxycarbonates mentioned into formates or oxalates, drying, grinding and calcining at from 700.degree. to 1100.degree. C. in an inert gas atmosphere.