Patents by Inventor Felix M. Mok

Felix M. Mok 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 the separation of sulphate
    Patent number: 5093089
    Abstract: Process for separating sulphate from a contaminating chromium component contained in an aqueous liquor by the crystallization of a sulphate compound. The sulphate may be separated substantially free of chromium component by adjustment of the pH to the range of from about 2.0 to about 6.5, followed by cooling of the liquor to precipitate the sulphate compound from solution which sulphate is subsequently removed. The process provides an effective method for the separation of sulphate from dichromate, and is particularly useful in the production of chlorate.
    Type: Grant
    Filed: July 16, 1990
    Date of Patent: March 3, 1992
    Assignee: Chemetics International Company Ltd.
    Inventors: Raymond E. Alford, Felix M. Mok