Patents by Inventor Jen-Ken Chang

Jen-Ken Chang 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).

  • Controlled release system and manufacturing method thereof
    Publication number: 20080220070
    Abstract: A controlled release system and manufacturing method thereof. The method comprises providing a first aqueous solution containing a hydrophilic drug and an alkaline agent, providing an organic solution containing a hydrophobic molecule, providing a second aqueous solution containing a hydrophilic surfactant, mixing the first hydrophilic solution with the organic solution to form a first emulsion, and mixing the first emulsion with a second aqueous solution to form a second emulsion containing delayed-release microsphere.
    Type: Application
    Filed: September 20, 2007
    Publication date: September 11, 2008
    Inventors: Yin-Chih Fu, Chih-Kuang Wang, Gwo-Jaw Wang, Mei-Ling Ho, Hui-Ting Chen, Jen-Ken Chang, Cherng-Chyi Tzeng