Patents by Inventor Frank L. Chen

Frank L. 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).

  • Sustained release micro-porous hollow fiber and method of manufacturing the same
    Publication number: 20030068353
    Abstract: A sustained release micro-porous hollow fiber and method of manufacturing the same. The central duct and peripheral wall of the hollow fiber is filled with active agents and the open ends are enveloped with a thin layer of permeable resin or impermeable resin. The active agents fill in the central duct of the hollow fiber using a vacuum system to evacuate the air contained in the central duct. The open ends of the hollow fiber can be enveloped with a thin layer of impermeable or permeable resin. The open ends and the micro-pores of the wall of the hollow fiber can also be enveloped by a thin layer of permeable resin.
    Type: Application
    Filed: March 21, 2002
    Publication date: April 10, 2003
    Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE
    Inventors: Frank L. Chen, Ya-Chin Wang