Patent 7132066 was granted and assigned to NGK Insulators on November, 2006 by the United States Patent and Trademark Office.
A method for producing a honeycomb structure using, as a part of a starting material, a recycled raw material recycled from a recovered material which is produced in the production process of the honeycomb structure and originates from the starting material for the honeycomb structure, and further provides the honeycomb structure. The recycled raw material is ground so that it has an average particle diameter of 10–2000 μm and contains 10% or less by weight of particles having an average particle diameter of 2800 μm or more.