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:
Aug. 01, 1989
Filed:
May. 18, 1987
Wankei Wan, Sarnia, CA;
Exxon Research & Engineering Company, Florham Park, NJ (US);
Abstract
Regenerated cellulose membranes used for the separation of organic liquids, for example, ketone dewaxing solvents from dewaxed oil or NMP extraction solvents from extract, have their solute rejection capability enhanced by chemical modification by contacting said membrane with a bifunctional reagent that is reactive with the hydroxy groups in the anhydroglucose units of the regenerated cellulose polymer. The reaction of the bifunctional reagent with the hydroxy groups in the polymer results in the crosslinking of the polymer which, in turn, results in the improvement of the membrane's selectivity in organic liquid separations applications.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile