Patents by Inventor Yoshiyuki Nishiyama

Yoshiyuki Nishiyama 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 producing a gaseous product from carbonaceous material
    Patent number: 4005995
    Abstract: A process for producing a gaseous product from carbonaceous material which is solid at room temperature comprising:Pretreating the particulate carbonaceous material with liquid ammonia at room temperature to 150.degree. C. to extract out of said carbonaceous material substantially all ammonia-solubles; and treating the residual carbonaceous material with a gasifying agent at a temperature of 400.degree. to 1,000.degree. C. under a pressure ranging from atmospheric pressure to super-atmospheric pressure in the presence or absence of a catalyst to obtain a gaseous product.With such process, there is obtained a high gasification efficiency, with avoidance of caking and coking the carbonaceous material.
    Type: Grant
    Filed: October 1, 1975
    Date of Patent: February 1, 1977
    Assignee: Tohoku University
    Inventors: Yasukatsu Tamai, Yoshiyuki Nishiyama, Minoru Mitida