Patents by Inventor Hiroshi Mitarashi

Hiroshi Mitarashi 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 preparing nitrogen-containing heterocyclic compounds
    Patent number: 3956329
    Abstract: Nitrogen-containing heterocyclic compounds are prepared by cyclization of a compound having the formula: ##EQU1## or ##EQU2## wherein X represents a hydrogen atom or --CH.sub.2 CHR-Y; R represents a hydrogen atom or methyl atom; Y represents an --OH group or --NH.sub.2 group; and n represents the integers 0 or 1 - 4; with a zeolite catalyst having the formulaa(M.sub.2/n O). (Al.sub.2 O.sub.3) . m(SiO.sub.2)wherein M represents a cation selected from alkali metals, alkaline earth metals, zinc group elements, hydrogen and ammonium cations; n represents the valence of the cation; a is 1.0 .+-. 0.5 and m is 2 - 12.
    Type: Grant
    Filed: July 19, 1974
    Date of Patent: May 11, 1976
    Assignee: Shunan Petrochemical Company, Ltd.
    Inventors: Ryuzo Murakami, Shigeaki Kato, Hiroshi Mitarashi