Inventor

Dennis W. Johnson

Inventor

Barberton, OH, US

Overview

1976–2021

Patent span

Performing operations

Primary field (CPC B)

Patents· 66 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

B01Dprimary

B01DSeparation31%

F23JRemoval or treatment of combustion products or combustion residues8%

Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests6%

Y02EReduction of greenhouse gas [ghg] emissions, related to energy generation, transmission or distribution5%

Y02ATechnologies for adaptation to climate change4%

B03CMagnetic or electrostatic separation of solid materials from solid materials or fluids3%

C01FCompounds of the metals beryllium, magnesium, aluminium, calcium, strontium, barium, radium, thorium, or of the rare-earth metals3%

Y02CCapture, storage, sequestration or disposal of greenhouse gases [ghg]3%

C01BNon-metallic elements3%

D21CProduction of cellulose by removing non-cellulose substances from cellulose-containing materials3%

PatentTitleYear

10,895,114System and method for delivery of oilfield materials2021 10,167,982Stacked duct assemblies2019 9,919,266'Systems and methods for treatment of flue gas'2018 9,709,271'Thermally controlled combustion system'2017 9,702,494'Duct assemblies with internally bolted expansion joint'2017 9,492,786'Multi-purpose absorber'2016 9,108,123'Steam efficiency with non depletive condensing and adiabatic solvent heating'2015 9,034,081'Down-flow direct contact cooler'2015 8,951,489'Cost control for CO2 capture'2015 8,882,896'Multi-directional outlet transition and hood'2014 8,591,844'Start up catalyst heating'2013 8,414,852'Prevention of nitro-amine formation in carbon dioxide absorption processes'2013 8,242,324'Removal of Hg, NOx, and SOx with using oxidants and staged gas/liquid contact'2012 7,628,967'Removal of Hg, NOx, and SOx with using oxidants and staged gas/liquid contact'2009 7,514,053'Method for removing sulfur dioxide, mercury, and nitrogen oxides from a gas stream'2009 7,294,322'Collection scoop for flue gas desulfurization systems with bleed streams or ex situ forced oxidation'2007 6,926,870'Collection scoop for flue gas desulfurization systems with bleed streams or ex situ forced oxidation'2005 6,726,748'Method of converting a downflow/upflow wet flue gas desulfurization (WFGD) system to an upflow single-loop WFGD system'2004 6,695,018'Collection scoop for flue gas desulfurization systems with bleed streams or ex situ forced oxidation'2004 6,303,083'Method and system for SO2 and SO3 control by dry sorbent/reagent injection and wet scrubbing'2001 6,273,940'Mist elimination/air toxic control in a wet scrubber using a condensing heat exchanger'2001 6,143,263'Method and system for SO.sub.2 and SO.sub.3 control by dry sorbent/reagent injection and wet scrubbing'2000 6,010,664'Oxidation detection for sulfite/sulfate systems'2000 5,846,301'Fine-particulate and aerosol removal technique in a condensing heat exchanger using an electrostatic system enhancement'1998 5,826,518'High velocity integrated flue gas treatment scrubbing system'1998 5,820,830'Waste recovery and utilization in the kraft recovery process'1998 5,791,404'Flooding reduction on a tubular heat exchanger'1998 5,792,238'Fine-particulate and aerosol removal technique in a condensing heat exchanger using an electrostatic system enhancement'1998 5,787,821'High velocity integrated flue gas treatment scrubbing system'1998 5,752,994'Black liquor gasifier'1998 5,707,426'Key advanced linear kinetic absorber method using a particulate arresting device'1998 5,676,715'Key advanced linear kinetic absorber system particulate arresting device'1997 5,674,459'Hydrogen peroxide for flue gas desulfurization'1997 5,672,323'Activated carbon flue gas desulfurization systems for mercury removal'1997 5,651,948'Low pressure drop, turbulent mixing zone dry scrubber'1997 5,645,616'Black liquor gasifier'1997 5,639,430'Low pressure drop, turbulent mixing zone dry scrubber'1997 5,634,950'Black liquor gasifier'1997 5,603,909'Selective catalytic reduction reactor integrated with condensing heat exchanger for multiple pollutant capture/removal'1997 5,599,508'Flue gas conditioning for the removal of acid gases, air toxics and trace metals'1997 5,599,382'Enhanced heat exchanger flue gas treatment using steam injection'1997 5,595,713'Hydrogen peroxide for flue gas desulfurization'1997 5,567,215'Enhanced heat exchanger flue gas treatment using steam injection'1996 5,553,782'Expandable diaphragm for scrubber atomizer caps'1996 5,542,609'Extended wear life low pressure drop right angle single exit orifice dual-fluid atomizer with replaceable wear materials'1996 5,534,230'Segmented heat exchanger flue gas treatment'1996 5,520,897'Method of reagent and oxidation air delivery'1996 5,510,094'Ammonia-limestone scrubbing with by-product for use in agriculture'1996 5,510,087'Two stage downflow flue gas treatment condensing heat exchanger'1996 5,500,196'Method of reagent and oxidation air delivery'1996 5,480,619'Regenerative scrubber application with condensing heat exchanger'1996 5,439,658'Regenerable magnesium dry scrubbing'1995 5,354,364'High efficiency advanced dry scrubber'1994 5,308,509'FGD performance enhancement by hydroclone and recycling steps'1994 5,281,402'Cost reduction of wet FGD system with a tray'1994 5,271,562'Dual fluid atomizer exit orifice shield gas supply housing'1993 5,266,287'Regenerable flue gas desulfurization system'1993 5,250,267'Particulate collection device with integral wet scrubber'1993 5,246,471'Method and apparatus for gas liquid contact'1993 5,215,557'Dry scrubber with integral particulate collection device'1993 5,194,076'Low pressure drop dry scrubber'1993 5,173,093'Single spray level for flue gas desulfurization system'1992 5,168,065'Forced oxidation monitoring and control system'1992 5,026,432'Method and apparatus for removing and disposing of contaminated concrete'1991 4,719,799'Head for a bubble tube'1988 3,993,877'Automatic dialing equipment'1976

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1976–1988Based in Saskatoon, CA· patent location history

1991–2012Based in Barberton, OH, US· patent location history

1992–2007Patents assigned to BABCOCK & WILCOX CO (46)· patent assignee history

1998Patents assigned to MCDERMOTT TECHNOLOGY INC (2)· patent assignee history

2012–2016Patents assigned to JOHNSON DENNIS W (8)· patent assignee history

2013–2019Patents assigned to FLUOR TECH CORP (10)· patent assignee history

2013–2016Patents assigned to BROWN JAMES H (3)· patent assignee history

2013–2019Based in Simpsonville, SC, US· patent location history

2021Based in Rosenberg, TX, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
BABCOCK & WILCOX CO	46	1992–2007
FLUOR TECH CORP	10	2013–2019
JOHNSON DENNIS Wself	8	2012–2016
BROWN JAMES H	3	2013–2016
MCDERMOTT TECHNOLOGY INC	2	1998

Locations

Location	Patents	Span
Barberton, OH, US	52	1991–2012
Simpsonville, SC, US	11	2013–2019
Saskatoon, CA	2	1976–1988
Rosenberg, Texas, US	1	2021