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. 11, 1988
Filed:
May. 09, 1986
James K Smith, Slidell, LA (US);
Stephen C Lynch, New Orleans, LA (US);
John W McTopy, II, LaPlace, LA (US);
Gulf South Research Institute, Baton Rouge, LA (US);
Abstract
Anisotropic gas separation membranes are treated to alter the microporosity of their thin, dense layer or composite coating--the layer or coating which provides selectivity in separations employing such membranes. The treatment increases the selectivity of a membrane with minimal decrease in its flux. The process comprises applying a polar activator to the membrane followed by exposing the membrane to microwave frequency radiation for a period of time sufficient to compact the thin layer of the membrane. The polar activator may be incorporated in the membrane during fabrication or applied as an after-treatment.