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:
Sep. 02, 2003
Filed:
Nov. 16, 2000
Applicant:
Inventors:
Bernd Felix, Burgkirchen, DE;
Reinhard Sulzbach, Burghausen, DE;
Stephan Führer, Burgkirchen, DE;
Thomas Kaiser, Kelkheim, DE;
Hagen Kniep, Frankfurt am Main, DE;
Armin Budesheim, Wiesbaden-Naurod, DE;
Assignee:
3M Innovative Properties Company, St. Paul, MN (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C 5/321 ; C07C 5/143 ; C08L 3/00 ;
U.S. Cl.
CPC ...
C07C 5/321 ; C07C 5/143 ; C08L 3/00 ;
Abstract
Fluorinated emulsifier acids can be isolated from wastewater by firstly removing fine solids and/or material which can be converted into fine solids from the wastewater, preferably by precipitation, subsequently bringing the wastewater into contact with an anion-exchange resin and eluting the adsorbed emulsifier acids from the latter.