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Jeffrey J. Theisen
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Prior Lake, MN, US
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Patents Grants
last 30 patents
Information
Patent Grant
Filter arrangement and methods
Patent number
8,425,769
Issue date
Apr 23, 2013
Donaldson Company, Inc.
Gary H. Gift
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Grant
Seal arrangement for spin-on filters
Patent number
6,096,208
Issue date
Aug 1, 2000
Donaldson Company, Inc.
John F. Connelly
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Grant
Fuel filter with sediment drain valve and level indicator
Patent number
6,083,381
Issue date
Jul 4, 2000
Donaldson Company, Inc.
John F. Connelly
F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information
Patent Grant
Fluid filter arrangement including valve arrangement, fluid level i...
Patent number
6,012,485
Issue date
Jan 11, 2000
Donaldson Company, Inc.
John F. Connelly
F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information
Patent Grant
Liquid filtration system incorporating a bypass filter element
Patent number
5,885,447
Issue date
Mar 23, 1999
Donaldson Company, Inc.
Jeffrey J. Theisen
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Grant
Pressure isolation valve and bypass valve; and filter head assembly...
Patent number
5,501,791
Issue date
Mar 26, 1996
Donaldson Company, Inc.
Jeffrey J. Theisen
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Grant
High pressure hydraulic spin-on filter
Patent number
5,104,537
Issue date
Apr 14, 1992
Donaldson Company, Inc.
Jack Stifelman
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Grant
Relief valve assembly; piston member from same and filter head asse...
Patent number
4,883,083
Issue date
Nov 28, 1989
Donaldson Company, Inc.
Patrick Fisher
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Patents Applications
last 30 patents
Information
Patent Application
FILTER ARRANGEMENT AND METHODS
Publication number
20100140155
Publication date
Jun 10, 2010
Donaldson Co., Inc.
Gary H. Gift
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL