Patents by Inventor Yoshiaki An-Nen

Yoshiaki An-Nen 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 mono- or di-ortho-methyl-substituted phenols by catalytic methylation and catalyst therefor
    Patent number: 4329517
    Abstract: In a process for producing a mono- or di-ortho-methyl-substituted phenol which comprises methylating a phenol having one or two ortho-hydrogens with methanol in the presence of a catalytic amount of a catalyst comprising a major proportion of an oxide of iron as a first component (A) and a minor proportion of at least one oxide of metal other than iron as a second component (B), the improvement wherein said metal other than iron in component (B) is a metal selected from the group consisting of Ga, Ge, Y, Nb, Hf, Bi and Ta; and a catalyst used therefor.
    Type: Grant
    Filed: May 14, 1980
    Date of Patent: May 11, 1982
    Assignee: Mitsui Petrochemical Industries Ltd.
    Inventors: Katsuo Taniguchi, Kazunori Takahata, Yoshiaki An-Nen