Lee; Douglas W.

Patent Applications and Registrations

Patent applications and USPTO patent grants for Lee; Douglas W..The latest application filed is for "vessel and method for treating contaminated water".

Company Profile

1.15.8

Lee; Douglas W. - Calgary CA
Lee; Douglas W. - Alberta CA
Lee; Douglas W. - Wichita KS
Lee; Douglas W. - Enid OK

*profile and listings may contain filings by different individuals or companies with the same name. Review application materials to confirm ownership/assignment.

Patent Activity

Patent	Date
Vessel and method for treating contaminated water Grant 10,329,168 - Lee , et al.	2019-06-25
Vessel And Method For Treating Contaminated Water App 20160185620 - Lee; Douglas W. ; et al.	2016-06-30
Method and device for cleaning non-fixed media filters Grant 9,174,149 - Lee , et al. November 3, 2	2015-11-03
Vessel and method for treating contaminated water Grant 9,150,430 - Lee , et al. October 6, 2	2015-10-06
Method and device for converting horizontal tanks into gas flotation separators Grant 8,968,571 - Lee , et al. March 3, 2	2015-03-03
Vessel And Method For Treating Contaminated Water App 20130292340 - Lee; Douglas W. ; et al.	2013-11-07
Vessel and method for treating contaminated water Grant 8,475,663 - Lee , et al. July 2, 2	2013-07-02
Vessel and method for treating contaminated water Grant 8,323,489 - Lee , et al. December 4, 2	2012-12-04
Vessel And Method For Treating Contaminated Water App 20120025407 - Lee; Douglas W. ; et al.	2012-02-02
Vessel and method for treating contaminated water Grant 8,080,158 - Lee , et al. December 20, 2	2011-12-20
Method And Device For Converting Horizontal Tanks Into Gas Flotation Separators App 20110297620 - Lee; Douglas W. ; et al.	2011-12-08
Vessel And Method For Treating Contaminated Water App 20110163040 - Lee; Douglas W. ; et al.	2011-07-07
Method And Device For Cleaning Non-fixed Media Filters App 20100320159 - Lee; Douglas W. ; et al.	2010-12-23
Vessel and method for treating contaminated water App 20070114183 - Lee; Douglas W. ; et al.	2007-05-24
Drilling rig breakout wrench system Grant 5,231,899 - Lee August 3, 1	1993-08-03
Method of providing a high pressure surge of working fluid to an underground percussive mole Grant 4,958,689 - Lee September 25, 1	1990-09-25
Downhole surge valve for earth boring apparatus Grant 4,928,775 - Lee May 29, 1	1990-05-29
Percussive mole boring device with electronic transmitter Grant 4,907,658 - Stangl , et al. March 13, 1	1990-03-13
Earth boring apparatus and method with control valve Grant 4,834,193 - Leitko, Jr. , et al. May 30, 1	1989-05-30

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