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:
May. 08, 2001
Filed:
Feb. 02, 1999
Jurgen Hanich, Frankfurt, DE;
Gillian-Ann Jaschik, Frankfurt, DE;
Jörg Wacker, Frankfurt, DE;
Giacinto Monari, Corlo, IT;
Cerdec Aktiengesellschaft Keramische Farben, Frankfurt, DE;
Abstract
The invention provides new stains which fire to a red-brown color for coloring ceramic compositions. The stains comprise Fe,O,and/or an Fe compound which forms Fe,O,on firing, in uniform distribution in a pulverulent matrix based on an oxide-like and/or silicate-like material which is amorphous to X-rays to the extent of at least 50% and has a specific surface area (BET) of at least 40 m,/g, and are obtainable by bringing the constituents into intensive contact together. The matrix preferably comprises 80 to 100% amorphous SiO,or SiO,-rich silicate with a BET surface area of 90 to 300 m,/g and 0 to 20% of an auxiliary substance, such as silicone oil. The stains can be prepared by intensive dry grinding.