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:
Oct. 04, 1988
Filed:
Jul. 28, 1987
Applicant:
Inventor:
William E Dummitt, St. Louis, MO (US);
Assignee:
Mallinckrodt Inc., St. Louis, MO (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C02C / ;
U.S. Cl.
CPC ...
570140 ; 570129 ;
Abstract
An improved method for preparing 4,4' difluorobiphenyl by reacting a parafluorinated Grignard reagent and a parafluorinated halophenyl in solution and in the presence of free palladium producing catalysts is disclosed.