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, 1993
Filed:
Sep. 20, 1991
Applicant:
Inventors:
Ulrich Wannagat, Wolfenbuttel, DE;
Adrian Schervan, Hamm, DE;
Martin Jansen, Bonn, DE;
Hans-Peter Baldus, Burscheid, DE;
Aloys Eiling, Bochum, DE;
Assignee:
Bayer Aktiengesellschaft, Leverkusen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01B / ;
U.S. Cl.
CPC ...
423344 ; 501 97 ; 546-2 ; 546-3 ; 546 14 ;
Abstract
Silicon diimide having a carbon content of at most 0.5% by weight and a chlorine content of at most 20 ppm is prepared by reacting ammonia with organyl amino silane at 50.degree.-300.degree. C. at elevated pressure and is useful as an intermediate for high grade silicon nitride.