Patents by Inventor Liang B. Chen

Liang B. Chen 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).

  • Rinse-off water-in-oil-in-water compositions
    Patent number: 5589177
    Abstract: Rinse-off, water-in-oil-in-water multiple emulsion compositions are disclosed. The multiple emulsion compositions comprise an external aqueous phase optionally incorporating an emulsifier and/or a second topically-active compound. The internal phase comprises a primary water-in-oil emulsion, wherein the primary emulsion comprises a first topically-active compound, a surfactant phase, an oil phase, and water.
    Type: Grant
    Filed: December 6, 1994
    Date of Patent: December 31, 1996
    Assignee: Helene Curtis, Inc.
    Inventors: Craig A. Herb, Liang B. Chen, Judy B. Chung, Michelle A. Long, Wei M. Sun, Gerald P. Newell, Kimberly Kamis, Richard M. Brucks