Patents by Inventor Siew F. Yoong

Siew F. Yoong 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).

  • Mild cold pearlizing concentrates
    Patent number: 5560873
    Abstract: Novel ultra-mild cold pearlizing concentrates provide pearlescent personal hair and skin compositions such as shampoos and beauty soaps with added luster and sheen.
    Type: Grant
    Filed: December 30, 1994
    Date of Patent: October 1, 1996
    Inventors: Pu Chen, Joseph Niu, Siew F. Yoong