Patents by Inventor Naomichi Miyakawa

Naomichi Miyakawa has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method for producing a silicon nitride filter
    Publication number: 20020043735
    Abstract: A method for producing a silicon nitride filter, which comprises heat-treating in nitrogen a green body comprising from 35 to 90 mass % of silicon nitride particles having an average particle diameter of from 1 to 30 &mgr;m, from 5 to 60 mass % of a pore-forming agent and from 0.
    Type: Application
    Filed: October 12, 2001
    Publication date: April 18, 2002
    Applicant: Asahi Glass Company, Limited
    Inventor: Naomichi Miyakawa
  • Silicon nitride porous body and its production process
    Publication number: 20010036531
    Abstract: A silicon nitride porous body which is a body having a generally columnar outer shape and at least two through-holes mutually parallel to one another and which has generally perpendicularly oriented columnar crystals on the surface of the through-holes.
    Type: Application
    Filed: April 27, 2001
    Publication date: November 1, 2001
    Applicant: Asahi Glass Company, Limited
    Inventors: Nobuhiro Shinohara, Naomichi Miyakawa, Kanji Arai