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Dennis D. Leatherman

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  • Upper St. Clair, PA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Abrasive article
    • Patent number 5,114,438
    • Issue date May 19, 1992
    • PPG Industries, Inc.
    • Dennis D. Leatherman
    • B24 - GRINDING POLISHING
  • Information Patent Grant

    Electrically conductive article
    • Patent number 5,047,283
    • Issue date Sep 10, 1991
    • PPG Industries, Inc.
    • Dennis D. Leatherman
    • H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • Information Patent Grant

    Active agent delivery device
    • Patent number 5,035,886
    • Issue date Jul 30, 1991
    • PPG Industries, Inc.
    • Paritosh M. Chakrabarti
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    Microporous material having a coating of hydrophobic polymer
    • Patent number 5,032,450
    • Issue date Jul 16, 1991
    • PPG Industries, Inc.
    • Thomas Rechlicz
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Active agent delivery device
    • Patent number 4,959,208
    • Issue date Sep 25, 1990
    • PPG Industries, Inc.
    • Paritosh M. Chakrabarti
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    Bacteria impermeable, gas permeable package
    • Patent number 4,937,115
    • Issue date Jun 26, 1990
    • PPG Industries, Inc.
    • Dennis D. Leatherman
    • B32 - LAYERED PRODUCTS
  • Information Patent Grant

    Pressure-sensitive multi-part record unit
    • Patent number 4,927,802
    • Issue date May 22, 1990
    • PPG Industries, Inc.
    • Dennis D. Leatherman
    • B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
  • Information Patent Grant

    Multilayer article of microporous and substantially nonporous mater...
    • Patent number 4,892,779
    • Issue date Jan 9, 1990
    • PPG Industries, Inc.
    • Dennis D. Leatherman
    • B32 - LAYERED PRODUCTS
  • Information Patent Grant

    Multilayer article of microporous and porous materials
    • Patent number 4,877,679
    • Issue date Oct 31, 1989
    • PPG Industries, Inc.
    • Dennis D. Leatherman
    • B32 - LAYERED PRODUCTS
  • Information Patent Grant

    Printed microporous material
    • Patent number 4,861,644
    • Issue date Aug 29, 1989
    • PPG Industries, Inc.
    • James Young
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    Stretched microporous material
    • Patent number 4,833,172
    • Issue date May 23, 1989
    • PPG Industries, Inc.
    • Richard A. Schwarz
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL