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:
Feb. 02, 1988
Filed:
Nov. 18, 1986
Applicant:
Inventors:
Assignee:
Swiss Aluminium Ltd., Chippis, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C25D / ; C25D / ; B23H / ; C25F / ;
U.S. Cl.
CPC ...
204 376 ; 204 33 ; 204 383 ; 20412955 ; 204295 ; 2041293 ; 20412995 ;
Abstract
A process for manufacturing a partially permeable membrane is such that a 20-200 .mu.m thick aluminum foil in the non-recrystallized condition is etched in an electrolyte at a current density in the range 2-20 kA/m.sup.2 and the surface given an after-treatment to prevent hydration reactions. The membrane is particularly suitable for ultrafiltration, gas separation or pervaporation and to that end can also be employed in combination with a polymer membrane.