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:
Feb. 09, 1993
Filed:
Dec. 23, 1991
Applicant:
Inventors:
Hirokazu Aoyama, Settsu, JP;
Takashi Yasuhara, Settsu, JP;
Satoru Kono, Settsu, JP;
Satoshi Koyama, Settsu, JP;
Souichi Ueda, Settsu, JP;
Assignee:
Daikin Industries, Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
570172 ;
Abstract
1,1,1,2,2-Pentafluoro-3,3-dichloropropane and 1,1,2,2,3-pentafluoro-1,3-dichloropropane are prepared in pure forms by reacting dichlorofluoromethane and tetrafluoroethylene, or chloroform, difluorochloromethane and tetrafluoroethylene in the presence of a catalyst comprising a halogenated zirconium of the formula: