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:
Nov. 21, 2006
Filed:
Nov. 05, 2004
Applicants:
Alexander Borisovich Shtarov, Wilmington, DE (US);
Stephen James Getty, Wilmington, DE (US);
Axel Hans-joachim Herzog, Wilmington, DE (US);
Inventors:
Alexander Borisovich Shtarov, Wilmington, DE (US);
Stephen James Getty, Wilmington, DE (US);
Axel Hans-Joachim Herzog, Wilmington, DE (US);
Assignee:
E. I. du Pont de Nemours and Company, Wilmington, DE (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C 29/00 (2006.01); C07C 31/00 (2006.01); C07C 31/02 (2006.01); C07C 33/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A process for reducing the level of perfluoroalkanoic acids, perfluoroalkanoic esters, and perfluoroalkyliodides in fluorinated alcohols comprising heating a fluorinated alcohol, or mixtures thereof, containing said acids, esters, or iodides to a temperature of at least 175° C. in the presence of water and a base additive is disclosed.