Patents by Inventor John M. Denison

John M. Denison 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).

  • Active agent delivery device
    Patent number: 4959208
    Abstract: An active agent delivery device comprises (a) microporous material comprising a matrix consisting essentially of linear ultrahigh molecular weight polyolefin, a large proportion of finely divided water-insoluble filler of which at least about 50 percent by weight is siliceous, and interconnecting pores; and (b) a releasable active agent or precursor thereof associated with at least a portion of the filler.
    Type: Grant
    Filed: October 28, 1988
    Date of Patent: September 25, 1990
    Assignee: PPG Industries, Inc.
    Inventors: Paritosh M. Chakrabarti, John M. Denison, Harlan B. Johnson, Malcolm Korach, Dennis D. Leatherman, Linda P. Reinhardt, Richard A. Schwarz, Robert B. Simmons