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. 20, 2009
Filed:
Oct. 14, 2004
Charlotte Pham, Saverne, FR;
Laurie Pesant, Strasbourg, FR;
Pierre Bernhardt, Heiligenberg, FR;
Michel Wolf, Brumath, FR;
Cuong Pham-huu, Saverne, FR;
Marc-jacques Ledoux, Strasbourg, FR;
Michel Kartheuser, Soufflenheim, FR;
Estelle Vanhaecke, Strasbourg, FR;
Charlotte Pham, Saverne, FR;
Laurie Pesant, Strasbourg, FR;
Pierre Bernhardt, Heiligenberg, FR;
Michel Wolf, Brumath, FR;
Cuong Pham-Huu, Saverne, FR;
Marc-Jacques Ledoux, Strasbourg, FR;
Michel Kartheuser, Soufflenheim, FR;
Estelle Vanhaecke, Strasbourg, FR;
SICAT, Paris, FR;
Entre National de la Recherche Scientifigue, Paris, FR;
Universite Louis Pasteur de Strasbourg, Strasbourg, FR;
Abstract
This invention relates to β-SiC foam parts with a specific surface area preferably equal to at least 5 m/g and with at least two zones A and B with a different cellular porosity distribution, wherein the parts were made by chemical transformation of a porous precursor medium comprising at least two blocks A' and B′, each having a different cellular porosity distribution, and in that the at least two zones A and B are derived from the chemical transformation of the two blocks A′ and B′. This foam, optionally after deposition of an active layer, may be used as a filter medium in cartridges designed for the purification of exhaust gases. The invention also relates to manufacturing processes for preparing such a filter medium.