Patents by Inventor Takahiko ISHIKAWA

Takahiko ISHIKAWA 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).

  • PHOSPHORUS ELEMENT-CONTAINING ZEOLITE AND METHOD FOR PRODUCING PHOSPHORUS ELEMENT-CONTAINING ZEOLITE
    Publication number: 20230219822
    Abstract: A small-pore zeolite that is modified with phosphorus, is excellent in hydrothermal durability, and has an 8-membered oxygen ring structure. The 8-membered oxygen ring structure is CHA, AEI, and AFX. The small-pore zeolite incudes at least an aluminum element, a silica element, a phosphorus element, wherein the phosphorus element is defined by expression (1), and the small-pore zeolite has an 8-membered oxygen ring structure being of CHA, AEI, or AFX. The phosphorus element that modifies the zeolite is unevenly distributed and richly contained on the surface layer side of the zeolite. A method for producing a phosphorus element-containing zeolite.
    Type: Application
    Filed: April 6, 2021
    Publication date: July 13, 2023
    Applicant: N.E. CHEMCAT CORPORATION
    Inventors: Yukio TAKAGI, Yasuyuki BANNO, Kiyohiko SAITO, Hiroyasu SUZUKA, Yosuke IMANAKA, Takahiko ISHIKAWA