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. 11, 2013
Filed:
Sep. 10, 2010
Allen Capron Sievert, Elkton, MD (US);
Lee Grant Sprague, Augusta, GA (US);
James A. Schultz, Swedesboro, NJ (US);
Katelyn Rae Walck, West Chester, PA (US);
Allen Capron Sievert, Elkton, MD (US);
Lee Grant Sprague, Augusta, GA (US);
James A. Schultz, Swedesboro, NJ (US);
Katelyn Rae Walck, West Chester, PA (US);
E.I. du Pont de Nemours and Company, Wilmington, DE (US);
Abstract
A process for the purification of fluoroalkanesulfonate salt comprising (a) contacting a mixture of said salt and an inorganic salt contaminant with a solvent to selectively dissolve said fluoroalkanesulfonate salt in solution, and (b) isolating the solution, to yield a fluoroalkanesulfonate salt containing less than 500 micrograms of inorganic salt contaminant per gram of fluoroalkanesulfonate salt, or containing less than a maximum of 0.3% by weight of individual solvent.