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:
Aug. 15, 1978
Filed:
Jun. 20, 1977
Applicant:
Inventors:
Karl Alex Schwetz, Sulzberg, DE;
George Vogt, Kempten-Sankt Mang, DE;
Alfred Lipp, Bad Worishofen, DE;
Assignee:
Elektroschmelzwerk Kempten GmbH, Herzog-Wilheim-Strasse 16, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01B / ;
U.S. Cl.
CPC ...
423290 ;
Abstract
Process for the manufacture of hexagonal boron nitride which comprises causing a starting material containing an alkali metal boride or an alkaline earth metal boride, preferably a hexa- or dodecaboride, to react with nitrogen at temperatures of at least 900.degree. C and, if desired, up to 2500.degree. C, in the presence of impurities or additives of other boron compounds or compounds of the alkaline earth metals or of carbon compounds. Boron nitride has many uses in various fields, among them, electronics and crucible melting for most non-metallic melts.