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:
Jun. 09, 1998
Filed:
Nov. 27, 1996
Applicant:
Inventors:
Lev Solomonovich German, deceased, late of Moscow, RU;
Valerii Romanovich Polishchuk, deceased, late of Lod, IL;
Riichi Iwa, Ibaraki, JP;
Haruyoshi Tatsu, Ibaraki, JP;
Assignee:
Nippon Mektron, Limited, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
570127 ; 570144 ;
Abstract
2,2-diphenylhexafluoropropanes are prepared by condensation reaction of benzene or benzenes substituted with a halogen atom or atoms, a lower alkyl group or groups or a hydroxyl group or groups with hexafluoroacetone in the presence of trifluoromethane sulfonic acid. Among the 2,2-diphenylhexafluoropropanes, 2,2-diphenylhexafluoropropane and 2,2-bis(p-chlorophenyl)hexafluoropropane are novel compounds.