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:
Apr. 30, 2002
Filed:
Feb. 22, 2000
Applicant:
Inventors:
Martin Jansen, Leonberg, DE;
Eberhard Günther, Niederkassel, DE;
Hans-Peter Letschert, Hanau, DE;
Assignee:
dmc, Frankfurt, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01B 2/106 ;
U.S. Cl.
CPC ...
C01B 2/106 ;
Abstract
Nitride or oxidenitride based red to yellow pigments, such as tantalum(V) nitride and oxidenitrides containing tantalum may be produced by passing ammonia over nitridable metal compounds, in particular oxide compounds, at 700 to 1250° C. According to the invention, nitriding proceeds in a rotary tube or fluidised bed reactor in the presence of an oxide from the series SiO , ZrO , GeO , SnO , TiO and HfO under conditions under which this oxide is substantially not nitrided.