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:
Mar. 14, 1989
Filed:
Oct. 16, 1987
Applicant:
Inventor:
Christian Ehrsam, Winterthur, CH;
Assignee:
Sulzer Brothers Limited, Winterthur, CH;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
210490 ; 21050025 ; 204 24 ; 428613 ;
Abstract
A metal microfilter foil is provided with a supporting structure made up of two layers which are deposited on a rear side of the foil. The first layer comprises a plurality of connecting elements of column or web shape which widen at the top to form enlarged portions which merge together to form the second layer leaving open macropores. The continuous supporting structure provides large pores as compared with the micropores of the foil and offer considerable stability.