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:
Apr. 21, 1987
Filed:
Oct. 25, 1985
Applicant:
Inventors:
Wendell G Bark, Baton Rouge, LA (US);
John C Parks, Ballwin, MO (US);
Assignee:
Ethyl Corporation, Richmond, VA (US);
Primary Examiner:
Int. Cl.
CPC ...
B02C / ; C07C / ;
U.S. Cl.
CPC ...
241 18 ; 241 23 ; 568639 ; 570211 ;
Abstract
A process for purifying crude brominated aromatic compounds such as decabromodiphenyl oxide containing impurities. The crude brominated aromatic compound undergoes a single processing step of grinding in the presence of heated air. The temperature is sufficient to effect substantial removal of impurities and yet remains below the melting point of the brominated aromatic compound.