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Fred H. Wahlquist
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Bloomington, MN, US
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Patents Grants
last 30 patents
Information
Patent Grant
Pulse jet air cleaner systems; evacuation valve arrangements; air c...
Patent number
11,826,691
Issue date
Nov 28, 2023
Donaldson Company, Inc.
Fred Wahlquist
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Grant
Pulse ring assembly for air cleaner systems and methods thereof
Patent number
11,731,072
Issue date
Aug 22, 2023
Donaldson Company, Inc.
Thomas R. Olson
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Grant
Pulse jet air cleaner systems; components; and, methods
Patent number
10,967,320
Issue date
Apr 6, 2021
Donaldson Company, Inc.
Gary Gillingham
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Grant
Pulse jet air cleaner systems; evacuation valve arrangements; air c...
Patent number
10,675,578
Issue date
Jun 9, 2020
Donaldson Company, Inc.
Fred Wahlquist
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Grant
Pulse jet air cleaner systems, components, and, methods
Patent number
10,512,870
Issue date
Dec 24, 2019
Donaldson Company, Inc.
Gary Gillingham
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Grant
Pulse jet air cleaner systems, components, and, methods
Patent number
9,757,673
Issue date
Sep 12, 2017
Donaldson Company, Inc.
Gary Gillingham
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Grant
Pulse jet air cleaner systems; evacuation valve arrangements; air c...
Patent number
9,737,837
Issue date
Aug 22, 2017
Donaldson Company, Inc.
Fred H. Wahlquist
F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information
Patent Grant
Pulse jet air cleaner systems; evacuation valve arrangements; air c...
Patent number
9,186,612
Issue date
Nov 17, 2015
Donaldson Company, Inc.
Fred Wahlquist
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Grant
Pulse jet air cleaner systems; components; and, methods
Patent number
9,108,135
Issue date
Aug 18, 2015
Donaldson Company, Inc.
Gary Gillingham
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Grant
Pulse jet air cleaner components; features; assemblies; and, methods
Patent number
8,951,321
Issue date
Feb 10, 2015
Donaldson Company, Inc.
Gary Ray Gillingham
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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
Multistage air cleaner including pulse cleaning system
Patent number
8,444,748
Issue date
May 21, 2013
Donaldson Company, Inc.
Gary R. Gillingham
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Grant
Pulse jet air cleaner system; components; and, methods
Patent number
8,404,021
Issue date
Mar 26, 2013
Donaldson Company, Inc.
Gary R. Gillingham
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
Evacuation valve arrangements; pulse jet air cleaner systems using...
Patent number
8,262,762
Issue date
Sep 11, 2012
Donaldson Company, Inc.
Thomas Olson
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Grant
Evacuation value arrangements; pulse jet air cleaner systems using...
Patent number
7,927,396
Issue date
Apr 19, 2011
Donaldson Company, Inc.
Thomas R. Olson
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
Multistage air cleaner including pulse cleaning system
Patent number
7,090,711
Issue date
Aug 15, 2006
Donaldson Company, Inc.
Gary R. Gillingham
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Grant
Multistage air cleaner including pulse cleaning system
Patent number
6,908,494
Issue date
Jun 21, 2005
Donaldson Company, Inc.
Gary R. Gillingham
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Grant
Multistage air cleaner including pulse cleaning system
Patent number
6,872,237
Issue date
Mar 29, 2005
Donaldson Company, Inc.
Gary R. Gillingham
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Grant
Multistage air cleaner including pulse cleaning system
Patent number
6,676,721
Issue date
Jan 13, 2004
Donaldson Company, Inc.
Gary R. Gillingham
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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
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
Conical filter
Patent number
5,902,364
Issue date
May 11, 1999
Donaldson Company, Inc.
Joseph C. Tokar
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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
Inline filter apparatus
Patent number
5,820,646
Issue date
Oct 13, 1998
Donaldson Company, Inc.
Gary R. Gillingham
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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
Air cleaner having scavenger arrangement
Patent number
5,683,479
Issue date
Nov 4, 1997
Donaldson Company, Inc.
Gary R. Gillingham
F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information
Patent Grant
Air cleaner
Patent number
5,575,826
Issue date
Nov 19, 1996
Donaldson Company, Inc.
Gary R. Gillingham
F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Patents Applications
last 30 patents
Information
Patent Application
PULSE RING ASSEMBLY FOR AIR CLEANER SYSTEMS AND METHODS THEREOF
Publication number
20230372859
Publication date
Nov 23, 2023
Donaldson Company, Inc.
Thomas R. Olson
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Application
PULSE JET AIR CLEANER SYSTEMS; EVACUATION VALVE ARRANGEMENTS; AIR C...
Publication number
20200398206
Publication date
Dec 24, 2020
Donaldson Company, Inc.
Fred Wahlquist
F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information
Patent Application
PULSE RING ASSEMBLY FOR AIR CLEANER SYSTEMS AND METHODS THEREOF
Publication number
20200338488
Publication date
Oct 29, 2020
Donaldson Company, Inc.
Thomas R. Olson
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Application
PULSE JET AIR CLEANER SYSTEMS; COMPONENTS; AND, METHODS
Publication number
20200230538
Publication date
Jul 23, 2020
Donaldson Company, Inc.
GARY GILLINGHAM
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Application
PULSE JET AIR CLEANER SYSTEMS, COMPONENTS, AND, METHODS
Publication number
20170368489
Publication date
Dec 28, 2017
Donaldson Company, Inc.
GARY GILLINGHAM
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Application
PULSE JET AIR CLEANER SYSTEMS; EVACUATION VALVE ARRANGEMENTS; AIR C...
Publication number
20170341000
Publication date
Nov 30, 2017
Donaldson Company, Inc.
Fred Wahlquist
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Application
Pulse Jet Air Cleaner Systems; Evacuation Valve Arrangements; Air C...
Publication number
20160166967
Publication date
Jun 16, 2016
Donaldson Company, Inc.
Fred H. Wahlquist
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Application
PULSE JET AIR CLEANER SYSTEMS, COMPONENTS, AND, METHODS
Publication number
20150343362
Publication date
Dec 3, 2015
Donaldson Company, Inc.
GARY GILLINGHAM
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Application
PULSE JET AIR CLEANER SYSTEMS; COMPONENTS; AND, METHODS
Publication number
20130219839
Publication date
Aug 29, 2013
Donaldson Company, Inc.
Gary Gillingham
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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
PULSE JET AIR CLEANER SYSTEMS; EVACUATION VALVE ARRANGEMENTS; AIR C...
Publication number
20110252964
Publication date
Oct 20, 2011
Donaldson Company Inc.
Fred Wahlquist
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Application
Evacuation Valve Arrangements; Pulse Jet Air Cleaner Systems Using...
Publication number
20110185893
Publication date
Aug 4, 2011
Donaldson Company, Inc.
Thomas R. Olson
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Application
Pulse jet air cleaner system; components; and, methods
Publication number
20110011042
Publication date
Jan 20, 2011
Donaldson Company, Inc.
Gary R. Gillingham
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Application
Pulse Jet Air Cleaner Components; Features; Assemblies; and, Methods
Publication number
20100031616
Publication date
Feb 11, 2010
Donaldson Company, Inc.
Gary Ray Gillingham
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Application
Evacuation value arrangements; pulse jet air cleaner systems using...
Publication number
20090308034
Publication date
Dec 17, 2009
Thomas R. Olson
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Application
FILTER ELEMENT ARRANGEMENT INCLUDING BYPASS ARRANGEMENT AND METHODS
Publication number
20090229458
Publication date
Sep 17, 2009
Terrance D. Feddersen
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
MULTISTAGE AIR CLEANER INCLUDING PULSE CLEANING SYSTEM
Publication number
20070186774
Publication date
Aug 16, 2007
Donaldson Company, Inc.
Gary R. Gillingham
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Application
MULTISTAGE AIR CLEANER INCLUDING PULSE CLEANING SYSTEM
Publication number
20060277871
Publication date
Dec 14, 2006
Gary R. Gillingham
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Application
Multistage air cleaner including pulse cleaning system
Publication number
20050166559
Publication date
Aug 4, 2005
Donaldson Company, Inc.
Gary R. Gillingham
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Application
Multistage air cleaner including pulse cleaning system
Publication number
20040144253
Publication date
Jul 29, 2004
Donaldson Company, Inc.
Gary R. Gillingham
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Application
Multistage air cleaner including pulse cleaning system
Publication number
20040139707
Publication date
Jul 22, 2004
Donaldson Company, Inc.
Gary R. Gillingham
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