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, 2009
Filed:
Jul. 29, 2008
Chun-hsu Lin, Taipei, TW;
Chac-chou Tu, Hsinchu County, TW;
Chan-yuan Ho, Hsinchu, TW;
Chuan-yu Chou, Jhongli, TW;
Wei-hsiung Ou, Longtan Township, Taoyuan County, TW;
Shieh-jun Wang, Taipei, TW;
Chun-Hsu Lin, Taipei, TW;
Chac-Chou Tu, Hsinchu County, TW;
Chan-Yuan Ho, Hsinchu, TW;
Chuan-Yu Chou, Jhongli, TW;
Wei-Hsiung Ou, Longtan Township, Taoyuan County, TW;
Shieh-Jun Wang, Taipei, TW;
Abstract
A method for producing 1,4-bis(difluoromethyl)tetrafluorobenzene is disclosed, which has the following steps: (a) mixing 1,4-bis(dichloromethyl)tetrafluorobenzene, a catalyst, an aprotic polar solvent, and an alkali metal fluoride to form a reaction mixture; (b) heating the reaction mixture; and (c) purifying the resultant to obtain 1,4-bis(difluoromethyl)tetrafluorobenzene.