Patents by Inventor Chyn Duog Shiah

Chyn Duog Shiah 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).

  • Topical hair coloring formulation in the form of suspension, lotion and cream
    Patent number: 4173453
    Abstract: Hair coloring formulations in the form of suspensions, lotions, or creams based upon a combination of water-soluble copper salts, water-soluble iron salts and finely divided sulfur are described. No toxic lead salts are used. Hair coloring formulations which contain copper cystine or zinc cystine and finely divided sulfur are also described. These formulations are particularly useful for the gradual coloring of gray hair.
    Type: Grant
    Filed: March 9, 1978
    Date of Patent: November 6, 1979
    Assignee: CDC Research Inc.
    Inventor: Chyn-Duog Shiah
  • Production of rutile from ilmenite
    Patent number: 4085190
    Abstract: A catalytic ilmenite reduction procedure is described which provides a magnetic fraction consisting of the iron and titanium values of the ilmenite ores and a non-magnetic gangue. The magnetic fraction, after solubilization of the reduced iron, provides beneficiated Rutile-type titania product with purity ranges from 80 to 95% depending on the grade of ilmenite starting material. The titanias are further purified by sulfation and a metathetical reaction to convert the titanyl sulfates to chlorides by CaCl.sub.2.
    Type: Grant
    Filed: April 29, 1975
    Date of Patent: April 18, 1978
    Inventor: Chyn Duog Shiah