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:
Jun. 01, 1982
Filed:
Jul. 30, 1980
Peter Bock, Bayreuth, DE;
Rosenthal Technik AG, Selb, DE;
Abstract
Disclosed is an alumina porcelain composition, suitable for use after firing to form electric insulators, comprising from about 40 to 65% by weight of calcined alumina, from about 15 to 40% by weight of plastic kaolinite-montmorillonite constituents, and from about 20 to 26% by weight of a flux combination which contains alkali-aluminum silicates and from about 0.1 to 5% by weight of one or more alkaline earth oxides, preferably in the form of alkaline earth compounds. The flux combination preferably comprises about 22 to 24% by weight of potassium-aluminum silicates and from about 0.2 to 2.5% by weight of barium oxide in the form of barium compounds, thus avoiding the disadvantages associated with the use of TiO.sub.2 and MnO.sub.2.