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:
May. 09, 2000
Filed:
Nov. 24, 1998
Applicant:
Inventors:
Roderick J Ray, Bend, OR (US);
David D Newbold, Bend, OR (US);
Dwayne T Friesen, Bend, OR (US);
Scott B McCray, Bend, OR (US);
Lori A Ray, Bend, OR (US);
Assignee:
Bend Research, Inc., Bend, OR (US);
Primary Examiner:
Int. Cl.
CPC ...
B01D / ; B01D / ; B01D / ;
U.S. Cl.
CPC ...
95 52 ; 95118 ; 210638 ; 210669 ; 210685 ; 210767 ;
Abstract
A system for the ultrapurification of organic solvents comprising (1) a membrane-based vapor permeation step for selective removal of water vapor from the solvent, wherein a countercurrent sweep stream is used that has a particular partial pressure of water vapor, (2) a filtration step for selective removal of particulates, and (3) an ion exchange step for selective removal of ionic species.