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:
Jul. 09, 1991
Filed:
Jan. 18, 1990
Applicant:
Inventors:
Osamu Funayama, Iruma, JP;
Mikiro Arai, Iruma, JP;
Yuuji Tashiro, Iruma, JP;
Takeshi Isoda, Niiza, JP;
Kiyoshi Sato, Kamifukuoka, JP;
Assignee:
Tonen Corporation, , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07F / ; C07F / ; C07F / ; C08G / ;
U.S. Cl.
CPC ...
556402 ; 556403 ; 528 12 ; 528 30 ;
Abstract
Disclosed is a polyborosilazane having a B/Si atomic ratio of 0.01 to 3 and a number-average molecular weight of about 200 to about 500,000 which can be pyrolyzed to give ceramics. The polyborosilazane is produced by reacting a polysilazane having a number-average molecular weight of about 100 to about 50,000 with a boron compound.