Patents by Inventor Fey-Long Wang

Fey-Long Wang 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 selective ortho-methylation of cyclohexanones in the vapor phase
    Patent number: 5488173
    Abstract: A cyclohexanone having at least one ortho-hydrogen is selectively methylated in the ortho-position in the vapor phase. High conversion of the selected cyclohexanone and high selectivity in the ortho-position are obtained. The reaction products include 2-methylcyclohexanone, 2,6-dimethylcyclohexanone and 2,6-xylenol.
    Type: Grant
    Filed: August 3, 1994
    Date of Patent: January 30, 1996
    Inventor: Fey-Long Wang