Patents by Inventor Teiji Yamada

Teiji Yamada 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).

  • Catalyst for purification of exhaust gas
    Patent number: 5202300
    Abstract: A catalyst composition comprising a refractory support having deposited thereon an active layer containing a platinum group metal component comprising an alumina component having the platinum group metals rhodium and palladium dispersed thereon, a cerium compound, a strontium compound, and a zirconium compound.
    Type: Grant
    Filed: October 23, 1990
    Date of Patent: April 13, 1993
    Assignee: Engelhard Corporation
    Inventors: Masaki Funabiki, Kunihide Kayano, Teiji Yamada
  • Exhaust gas-purifying catalyst excellent in heat resistance and process for preparation thereof
    Patent number: 5200384
    Abstract: This invention relates to a purifying-catalyst for exhaust gas emitted from internal combustion engines such as automobiles, and the object is to provide a catalyst which exhibits excellent exhaust gas purification performance at lower temperature compared to usual catalysts, even after high temperature aging, and a process for preparation thereof.
    Type: Grant
    Filed: February 11, 1991
    Date of Patent: April 6, 1993
    Assignee: N.E Chemcat Corporation
    Inventors: Masaki Funabiki, Kunihide Kayano, Teiji Yamada
  • Exhaust gas-purifying catalyst and process for preparation thereof
    Patent number: 5147842
    Abstract: This invention relates to a purifying-catalyst for exhaust gas emitted from internal combustion engines such as automobiles, and the object is to provide a catalyst which exhibits excellent exhaust gas purification performance at lower temperature compared to usual catalysts, even after high temperature aging, and a process for preparation thereof.
    Type: Grant
    Filed: February 11, 1991
    Date of Patent: September 15, 1992
    Assignee: N.E. Chemcat Corporation
    Inventors: Masaki Funabiki, Kunihide Kayano, Teiji Yamada
  • Exhaust gas purification catalyst for suppressing hydrogen sulfide evolution, and process for production thereof
    Patent number: 5039650
    Abstract: An exhaust gas purification catalyst for removing carbon monoxide, hydrocarbons and nitrogen oxides from an exhaust gas and suppressing the evolution of hydrogen sulfide comprises a monolithic support and deposited thereon, at least one platinum-group element, active alumina, cerium oxide and germanium oxide. The catalyst is produced by a process which comprises(a) a step of preparing active alumina having a compound of at least one platinum-group element deposited thereon,(b) a step of preparing a slurry comprising the active alumina obtained in step (a), cerium oxide, and germanium oxide, and(c) a step of depositing the slurry on a monolithic support and calcining the support.
    Type: Grant
    Filed: January 8, 1990
    Date of Patent: August 13, 1991
    Assignee: N. E. Chemcat Corporation
    Inventors: Teiji Yamada, Masaki Funabiki, Kunihide Kayano
  • Process for producing a catalyst for purifying exhaust gases from internal combustion engines
    Patent number: 4965243
    Abstract: A three-way catalyst for the purification of automotive exhaust is made by depositing on a monolithic support a slurry containing a platinum group element, active alumina, cerium oxide a barium compound and a zirconium compound and calcining the support.
    Type: Grant
    Filed: February 9, 1990
    Date of Patent: October 23, 1990
    Assignee: Engelhard Corporation
    Inventors: Teiji Yamada, Masaki Funabiki