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. 12, 1999
Filed:
Feb. 20, 1998
Applicant:
Inventors:
Tatsuya Otsuka, Settsu, JP;
Hirokazu Aoyama, Settsu, JP;
Assignee:
Daikin Industries, Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
568677 ; 568669 ; 568681 ; 568683 ;
Abstract
The present invention provides processes for preparing 2,2,3,3,4-pentafluorooxetane and/or 2,2,3,3,4,4-hexafluorooxetane which comprises reacting 2,2,3,3-tetrafluorooxetane with fluorine gas, the process inhibiting decomposition of the oxetane ring during the reaction and producing a reduced amount of by-products.