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:
Jan. 05, 1988
Filed:
Nov. 18, 1986
Applicant:
Inventors:
Assignee:
Swiss Aluminium Ltd., Chippis, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C25D / ; C25D / ; C25D / ; C25D / ;
U.S. Cl.
CPC ...
204 33 ; 204 383 ; 204 42 ; 2041293 ; 20412975 ; 204295 ;
Abstract
A process for manufacturing a microfilter is such that a foil having an aluminum content of at least 99.95% and thickness 20-250 .mu.m is given a recrystallizing anneal, is etched in an electrolyte in stages at constant current density in the range 0.01 to 2 kA/m.sup.2, and the surface given a stabilizing after treatment to prevent hydration reactions.