Patents by Inventor James W. Downing, Jr.

James W. Downing, Jr. 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 FOR PRODUCTION OF FLUOROPOLYMER MICROPOWDERS WITH REDUCED PFAS/PFOA
    Publication number: 20240010801
    Abstract: A method of manufacturing fluoropolymer micropowders with low perfluoroalkyl species (PFAS) content, such as perfluorooctanoic acid (PFOA). The method includes thermally treating, at a temperature from 125° C. to 300° C. Ma substantially oxygen free atmosphere and/or in a fluidized bed reactor, an irradiated or thermally degraded perfluorinated fluoropolymer. The method may also include micronizing the thermally treated low molecular weight fluoropolymer intermediate to provide a micropowder.
    Type: Application
    Filed: November 24, 2021
    Publication date: January 11, 2024
    Applicant: PPG Industries Ohio, Inc.
    Inventors: James W. Downing, Jr., Kurt L. Mecray, Michael J. Haley
  • Microsphere-filled polytetrafluoroethylene compositions
    Patent number: 7314898
    Abstract: The present invention is a composition that includes granular-grade polytetrafluoroethylene and a plurality of microspheres, where the plurality of microspheres have an average specific gravity less than about 0.9 grams per cubic centimeter.
    Type: Grant
    Filed: December 29, 2004
    Date of Patent: January 1, 2008
    Assignee: 3M Innovative Properties Company
    Inventors: James W. Downing, Jr., Kenji Nagai, Makoto Nagase, Katsuhiko Nakazato