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:
Dec. 26, 1989
Filed:
Apr. 16, 1987
Applicant:
Inventors:
Assignee:
Alcan International Limited, Montreal, CA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
2104931 ; 210496 ; 21050025 ; 428409 ; 428701 ;
Abstract
A porous anodic aluminum oxide membrane, at least one surface of which is profiled on a scale of 0.01 to 50 mm, may be made by profiling a surface of an aluminium metal substrate anodizing the substrate to form a porous membrane on the surface and separating the membrane from the substrate. The profiling may consist of a system of parallel ribs and troughs. Structure having an interesting properties as filters can be built up by the use of several such membranes bonded to one another along the crests of the ribs.