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. 27, 1990
Filed:
Oct. 07, 1986
Michiyasu Komatsu, Yokohama, JP;
Tadashi Miyano, Sagamihara, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
A method for the production of a silicon nitride ceramics exhibiting high mechanical strength at elevated temperature is disclosed. This production is effected by a method which comprises preparing a mixture of silicon dioxide with excess carbon as a silicon nitride material for the silicon nitride ceramic, reducing this mixture in an atmosphere of nitrogen, roasting the resulting mixture of silicon nitride with carbon thereby giving rise to a silicon nitride-carbon mixture with the free carbon content thereof adjusted in the range of 0.1 to 3% by weight, molding the produced mixture in combination with a sintering aid in a prescribed shape, calcining the molded mixture, and thereafter sintering the calcined mass.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile