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:
Jul. 15, 2025
Filed:
Feb. 02, 2022
Johnson Matthey Public Limited Company, London, GB;
Sabina Burmester, Royston, GB;
Thomas Hotchkiss, Royston, GB;
David Marvell, Royston, GB;
Jonathon Paul Sapsford, Royston, GB;
Johnson Matthey Public Limited Company, London, GB;
Abstract
Methods for treating a filter for filtering particulate matter from exhaust gas are disclosed in which a dry powder is sprayed towards an inlet face of the filter entrained in a primary flow of gas to pass through the inlet face to contact a porous structure of the filter. The back pressure of the filter is monitored during spraying of the dry powder and the spraying of the dry powder is stopped when the back pressure of the filter reaches a required value. The required value may equal an absolute back pressure, or a pre-determined target back pressure for the filter minus an offset pressure, or an estimated back pressure of the filter.