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:
Nov. 02, 1976
Filed:
Dec. 23, 1974
Roland John Lumby, Birmingham, EN;
Bernard North, Birmingham, EN;
Joseph Lucas Limited, Birmingham, EN;
Abstract
In a method of forming a sintered, ceramic product, aluminium nitride is reacted with silica at a temperature of between 1200.degree. and 2000.degree. C to form a single phase silicon aluminium oxynitride ceramic material, the reaction mixture at said temperature containing not more than 60% by weight of the aluminium nitride and also containing first and second metal oxides other than silica. The metal oxides are arranged so that they do not introduce into the mixture a combination of magnesium oxide and alumina alone and further are arranged so that during the reaction they combine with part of said silica to form a silicate glass having a liquidus temperature below that of the silicate glass which would be formed from silica with either of said metal oxides alone. The silicate glass formed then aids densification of the ceramic material during sintering.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile