Patents by Inventor Hiroshi Kurozumi

Hiroshi Kurozumi 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 extraction of highly purified oxygen
    Patent number: 4519813
    Abstract: A process for separating oxygen more than 90% pure from a raw material gas, for example air, containing oxygen and nitrogen as main components, includes at least two adsorption zones, each having an inlet and a discharging end, and containing therein a bed of an adsorbing agent having sieving action which is capable of selectively adsorbing nitrogen from said raw material gas.
    Type: Grant
    Filed: December 26, 1979
    Date of Patent: May 28, 1985
    Assignee: Osaka Oxygen Industries Ltd.
    Inventors: Zenzi Hagiwara, Tatuo Yamamoto, Hiroshi Kurozumi