Patents by Inventor John Kai-Fai Chan

John Kai-Fai Chan 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).

  • Preparation of organic sulfone compounds
    Patent number: 4097526
    Abstract: An in-situ process for preparing organic sulfone compounds by oxidizing the corresponding sulfide compound with a mixture of hydrogen peroxide, a carboxylic acid in the presence of a catalytic amount of a mineral acid or an organic sulfonic acid.
    Type: Grant
    Filed: February 10, 1977
    Date of Patent: June 27, 1978
    Assignee: Union Carbide Corporation
    Inventor: John Kai-Fai Chan