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. 11, 1990
Filed:
Jul. 31, 1989
Applicant:
Inventors:
Edgar S Sanders, Jr, Pittsburg, CA (US);
John A Jensvold, Benicia, CA (US);
Daniel O Clark, Benicia, CA (US);
Frederick L Coan, Pittsburg, CA (US);
Henry N Beck, Walnut Creek, CA (US);
William E Mickols, Martinez, CA (US);
Peter K Kim, Danville, CA (US);
Wudneh Admassu, Concord, CA (US);
Assignee:
The Dow Chemical Company, Midland, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ; B01D / ;
U.S. Cl.
CPC ...
55 16 ; 55 68 ; 55158 ; 264 41 ; 264184 ;
Abstract
The invention is a semi-permeable hollow fiber gas separation membrane possessing a non-external discriminating region fabricated from hydrophobic polymeric materials possessing less than about 1 weight percent equilibrium water content at about 25.degree. C. The invention includes a process for making such membranes as well as a method of using such membranes.