David Kolstad

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White Bear Township, MN, US

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Patents Grantslast 30 patents

Information Patent Grant
Membrane-based reservoir dryer
- Patent number 7,396,383
- Issue date Jul 8, 2008
- John H. Burban
- F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
Information Patent Grant
Oil filter and dehydrator
- Patent number 6,478,953
- Issue date Nov 12, 2002
- Porous Media Corporation
- Michael R. Spearman
- F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL

Patents Applicationslast 30 patents

Information Patent Application
Process and Apparatus to Remove Oxidation Products from Used Oil
- Publication number 20130045903
- Publication date Feb 21, 2013
- Robert O. Crowder
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Application
Delivery System for the Removal of Contaminants in Lubricating and...
- Publication number 20110132819
- Publication date Jun 9, 2011
- David Scott Kolstad
- C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
Information Patent Application
Membrane-based reservoir dryer
- Publication number 20060086249
- Publication date Apr 27, 2006
- John H. Burban
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Application
Filter dehydrator
- Publication number 20020063087
- Publication date May 30, 2002
- Michael R. Spearman
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL