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. 30, 2007
Filed:
Jul. 08, 2005
Applicants:
Alexandre Tchistiakov, Milan, IT;
Simonetta Fontana, Milan, IT;
Claudio Tonelli, Milan, IT;
Inventors:
Assignee:
Solvay Solexis S.p.A., Milan, IT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 41/03 (2006.01);
U.S. Cl.
CPC ...
Abstract
A process for separating bifunctional perfluoropolyethers (PFPEs) having two terminations —CHOH from their mixtures with monofunctional PFPEs with one termination —CHOH, of general formulaX—O—Rf—Y   (I)wherein Rf is a perfluoropolyoxyalkylene chain having a number average molecular weight of 500-10,000; Xand Y are end groups selected from —CFXCHOH (wherein X is F or CF), —CF, —CFCl, —CFCFCl, —CFCl, —CFBr, —CFCF, wherein at least one of the two end groups is —CFXCHOH, said process comprising the steps of: