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:
Dec. 09, 1980
Filed:
Aug. 01, 1979
Applicant:
Inventor:
Duk S Chun, Uniontown, OH (US);
Assignee:
PPG Industries, Inc., Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01B / ;
U.S. Cl.
CPC ...
423240 ; 423292 ; 423487 ;
Abstract
Boron trichloride containing minor amounts of phosgene as an impurity is purified by contacting a vaporous stream thereof and at least a stoichiometric amount of hydrogen, based on the phosgene impurity, with a substantially metal-free carbon catalyst under substantially anhydrous conditions at temperatures of between about 300.degree. C. and about 700.degree. C.