Patents by Inventor Fuming Bruce Li

Fuming Bruce Li 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).

  • METHOD OF MAKING ELECTRET ARTICLES BASED ON ZETA POTENTIAL
    Publication number: 20090293279
    Abstract: A method of making an electret article, from a polymeric article that has a zeta potential of greater than or less than ?7.5 millivolts. The article is charged by contacting it with an aqueous liquid that has a pH and conductivity as follows: (i) if the article has a zeta potential of ?7.5 mV or less, then the contacting liquid has pH greater than 7 and a conductivity of 5 to 9,000 microSiemens per centimeter; and (ii) if the article has a zeta potential of greater than ?7.5 mV, then the contacting liquid has a pH of 7 or less and a conductivity of 5 to 5,500 microSiemens per centimeter. An electret article made in this manner can provide improved electret performance, particularly in electret filtration articles.
    Type: Application
    Filed: June 2, 2008
    Publication date: December 3, 2009
    Inventors: John M. Sebastian, Marvin E. Jones, Fuming Bruce Li, Shih-Hung Chou, Nathan E. Schultz, Justin L. Keough, Rahul R. Shah, Daniel A. Japuntich