Patent ID: 11890607
Assignee: CORNING INCORPORATED
Field: Materials, metallurgy (Chemistry)
Classification: CPC B  C | IPC B

Claim 18:
19. A method of wash coating a porous ceramic article comprising an exterior surface, the method comprising:
applying a hydrophobic cellulose derivative to at least a portion of the exterior surface of the porous ceramic article to create a treated portion of the exterior surface;
heating the ceramic article for a time and at a temperature sufficient to at least partially dry the treated portion, wherein the treated portion is non-wettable;
applying an aqueous catalyst solution comprising catalyst material to the porous ceramic article and contacting the treated portion with the aqueous catalyst solution, the aqueous catalyst solution comprising catalyst material comprising platinum, palladium, rhodium, or combinations thereof; and
heating the ceramic article for a time and at a temperature sufficient to calcine catalyst material and to bond the catalyst material to an untreated portion of the porous ceramic article.