Patents by Inventor Kun-Chen Wang

Kun-Chen Wang 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).

  • Liquid dispersed dye of the azo or anthraquinone type
    Patent number: 6066183
    Abstract: A liquid dispersed dye of the azo or anthraquinone type that includes a dispersing agent and dispersing assistant in order to keep the dye dissolved in liquid without sedimentation. The preferred dispersing agent is a sulfonated lignin salt and the preferred dispersing assistant is a surfactant such as polyethylene glycol epoxide ether (EO-1), polyethylene glycol phenolic-formaldehyde epoxide ether (EO-2), or polyethylene glycol amino methylene epoxide ether (EO-3).
    Type: Grant
    Filed: April 13, 1998
    Date of Patent: May 23, 2000
    Assignee: I-Hwa Industrial Co., Ltd.
    Inventor: Kun-Chen Wang