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:
Jan. 24, 1995
Filed:
Sep. 24, 1993
Applicant:
Inventors:
Assignee:
Bayer AG, Leverkusen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C04B / ;
U.S. Cl.
CPC ...
264 65 ; 501 97 ; 501 98 ;
Abstract
The present invention relates to a process for the production of a dense Si.sub.3 N.sub.4 material by normal pressure sintering of mouldings which have been manufactured from mixtures of Si.sub.3 N.sub.4 powders and sintering additives without being embedded in a powder packing and are sintered at temperatures of 1775.degree. C.+-. 75.degree. C.