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Bernard A. Matthys

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  • Apple Valley, MN, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Fluted filter media
    • Patent number 8,460,442
    • Issue date Jun 11, 2013
    • Donaldson Company, Inc.
    • Wayne M. Wagner
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • Information Patent Grant

    Fluted filter media
    • Patent number 8,268,053
    • Issue date Sep 18, 2012
    • Donaldson Company, Inc.
    • Wayne M. Wagner
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • Information Patent Grant

    Method of making a fluted filter media for air filter
    • Patent number 7,329,326
    • Issue date Feb 12, 2008
    • Donaldson Company, Inc.
    • Wayne M. Wagner
    • Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Information Patent Grant

    Restriction indicator
    • Patent number 6,976,448
    • Issue date Dec 20, 2005
    • Donaldson Company, Inc.
    • William J. Krisko
    • Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Information Patent Grant

    Bowl-cartridge filter having interlock mechanism and methods
    • Patent number 6,752,924
    • Issue date Jun 22, 2004
    • Donaldson Company, Inc.
    • Michael J. Gustafson
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • Information Patent Grant

    Restriction indicator
    • Patent number 6,604,486
    • Issue date Aug 12, 2003
    • Donaldson Company, Inc.
    • William J. Krisko
    • Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Information Patent Grant

    Filter element
    • Patent number D470216
    • Issue date Feb 11, 2003
    • Donaldson Company, Inc.
    • Michael J. Gustafson
    • D23 - Environmental heating and cooling
  • Information Patent Grant

    Valve assembly for preventing liquid ingestion and methods
    • Patent number 6,213,146
    • Issue date Apr 10, 2001
    • Donaldson Company, Inc.
    • Daniel T. Risch
    • F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • Information Patent Grant

    Valve assembly for preventing liquid ingestion and methods
    • Patent number 6,209,559
    • Issue date Apr 3, 2001
    • Donaldson Company, Inc.
    • Daniel T. Risch
    • F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • Information Patent Grant

    Combined filter element and frame therefor
    • Patent number D425189
    • Issue date May 16, 2000
    • Donaldson Company, Inc.
    • Gary R. Gillingham
    • D23 - Environmental heating and cooling
  • Information Patent Grant

    Integrated resonator and filter apparatus
    • Patent number 6,048,386
    • Issue date Apr 11, 2000
    • Donaldson Company, Inc.
    • Gary R. Gillingham
    • F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • Information Patent Grant

    Valve assembly for preventing liquid ingestion and methods
    • Patent number 6,009,898
    • Issue date Jan 4, 2000
    • Donaldson Company, Inc.
    • Daniel T. Risch
    • F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • Information Patent Grant

    Rolled liquid filter using fluted media
    • Patent number 5,895,574
    • Issue date Apr 20, 1999
    • Donaldson Company, Inc.
    • Francis A. Friedmann
    • F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • Information Patent Grant

    Combined filter element and frame therefor
    • Patent number D398046
    • Issue date Sep 8, 1998
    • Donaldson Company, Inc.
    • Gary R. Gillingham
    • D23 - Environmental heating and cooling
  • Information Patent Grant

    Integrated resonator and filter apparatus
    • Patent number 5,792,247
    • Issue date Aug 11, 1998
    • Donaldson Company, Inc.
    • Gary R. Gillingham
    • F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • Information Patent Grant

    Slanted inline filter
    • Patent number 5,772,883
    • Issue date Jun 30, 1998
    • Donaldson Company, Inc.
    • Jim C. Rothman
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • Information Patent Grant

    Self-cleaning air filter
    • Patent number 4,504,293
    • Issue date Mar 12, 1985
    • Donaldson Company, Inc.
    • Gary R. Gillingham
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • Information Patent Grant

    Multi-phase self purging centrifuge
    • Patent number 4,406,651
    • Issue date Sep 27, 1983
    • Donaldson Company, Inc.
    • Denis J. Dudrey
    • B04 - CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL...

Patents Applicationslast 30 patents

  • Information Patent Application

    FLUTED FILTER MEDIA
    • Publication number 20120312167
    • Publication date Dec 13, 2012
    • Donaldson Company, Inc.
    • Wayne M. Wagner
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • Information Patent Application

    Fluted filter media
    • Publication number 20080216654
    • Publication date Sep 11, 2008
    • Donaldson Company, Inc.
    • Wayne M. Wagner
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • Information Patent Application

    Bowl-cartridge filter having interlock mechanism and methods
    • Publication number 20050161386
    • Publication date Jul 28, 2005
    • Donaldson Company, Inc.
    • Michael J. Gustafson
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • Information Patent Application

    Bowl-cartridge filter having interlock mechanism and methods
    • Publication number 20040232059
    • Publication date Nov 25, 2004
    • Donaldson Company, Inc.
    • Michael J. Gustafson
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • Information Patent Application

    Restriction indicator
    • Publication number 20040187765
    • Publication date Sep 30, 2004
    • Donaldson Company, Inc.
    • William J. Krisko
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • Information Patent Application

    Fluted filter media for air filter
    • Publication number 20030121845
    • Publication date Jul 3, 2003
    • Donaldson Company, Inc.
    • Wayne M. Wagner
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • Information Patent Application

    Bowl-cartridge filter having interlock mechanism and methods
    • Publication number 20020170279
    • Publication date Nov 21, 2002
    • Michael J. Gustafson
    • B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL