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:
Aug. 07, 1990
Filed:
Jan. 23, 1989
Applicant:
Inventors:
Yohnosuke Ohsaka, Ibaraki, JP;
Shoji Takaki, Takatsuki, JP;
Assignee:
Daikin Industries, Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
549511 ; 549510 ;
Abstract
A novel process for distillation of a mixture comprising 2,2,3,3-tetrafluorooxetane, which method comprises distilling the mixture comprising 2,2,3,3-tetrafluorooxetane in a metallic distillation column in the presence of at least one additive compound selected from the group consisting of an organic nitro compound and an aromatic compound.