Patents by Inventor Yoshihide Kotera

Yoshihide Kotera 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).

  • Process for production of hydrogen and sulfur from hydrogen sulfide as raw material
    Patent number: 4039613
    Abstract: Sulfur and hydrogen are produced from hydrogen sulfide according to the present invention by bringing hydrogen sulfide into contact, at a temperature exceeding the boiling point of sulfur, with at least one member selected from the group consisting of the sulfides of molybdenum, tungsten and ruthenium to give rise to a gaseous mixture consisting of hydrogen sulfide, hydrogen and sulfur, cooling the produced mixture to separate therefrom the sulfur component in the condensed form and leave behind a gaseous mixture wherein the hydrogen component makes up the majority of the total weight thereof and subsequently removing hydrogen sulfide from this mixture by means of condensation or absorption.
    Type: Grant
    Filed: March 9, 1976
    Date of Patent: August 2, 1977
    Assignee: Agency of Industrial Science & Technology
    Inventors: Yoshihide Kotera, Naoyuki Todo, Kenzo Fukuda
  • Process for production of hydrogen and sulfur from hydrogen sulfide as raw material
    Patent number: 3962409
    Abstract: Sulfur and hydrogen are produced from hydrogen sulfide according to the present invention by bringing hydrogen sulfide into contact, at a temperature exceeding the boiling point of sulfur, with at least one member selected from the group consisting of the sulfides of molybdenum, tungsten and ruthenium to give rise to a gaseous mixture consisting of hydrogen sulfide, hydrogen and sulfur, cooling the produced mixture to separate therefrom the sulfur component in the condensed form and leave behind a gaseous mixture wherein the hydrogen component makes up the majority of the total weight thereof and subsequently removing hydrogen sulfide from this mixture by means of condensation or absorption.
    Type: Grant
    Filed: October 24, 1974
    Date of Patent: June 8, 1976
    Assignee: Agency of Industrial Science & Technology
    Inventors: Yoshihide Kotera, Naoyuki Todo, Kenzo Fukuda