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Joanna L. Duncan
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Sanford, ME, US
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Patents Grants
last 30 patents
Information
Patent Grant
NOx, Hg, and SO2 removal using alkali hydroxide
Patent number
7,052,662
Issue date
May 30, 2006
Powerspan Corp.
Joanna L. Duncan
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Grant
Removing NOx, SO2, and Hg from a gas stream using limestone regener...
Patent number
7,048,899
Issue date
May 23, 2006
Powerspan Corp.
Francis R. Alix
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Grant
NOx, Hg, and SO2 removal using ammonia
Patent number
6,991,771
Issue date
Jan 31, 2006
Powerspan Corp.
Joanna L. Duncan
F23 - COMBUSTION APPARATUS COMBUSTION PROCESSES
Information
Patent Grant
NOx, Hg, and SO2 removal using ammonia
Patent number
6,936,231
Issue date
Aug 30, 2005
Powerspan Corp.
Joanna L. Duncan
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Grant
Sulfur dioxide removal using ammonia
Patent number
6,605,263
Issue date
Aug 12, 2003
Powerspan Corp.
Francis R. Alix
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Patents Applications
last 30 patents
Information
Patent Application
Absorption Media for Scrubbing CO2 from a Gas Stream and Methods Us...
Publication number
20130269525
Publication date
Oct 17, 2013
POWERSPAN CORP.
Francis R. Alix
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Application
METHOD AND APPARATUS FOR PRODUCING AMMONIUM CARBONATE FROM UREA
Publication number
20110110841
Publication date
May 12, 2011
POWERSPAN CORP.
Richard Mahoney
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Application
REMOVAL OF CARBON DIOXIDE FROM A FLUE GAS STREAM
Publication number
20110052453
Publication date
Mar 3, 2011
Christopher McLarnon
F23 - COMBUSTION APPARATUS COMBUSTION PROCESSES
Information
Patent Application
SCRUBBING OF AMMONIA WITH UREA AMMONIUM NITRATE SOLUTION
Publication number
20100319542
Publication date
Dec 23, 2010
POWERSPAN CORP.
Francis R. Alix
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Application
CARBON DIOXIDE SCRUBBING WITH AMMONIUM CARBONATE AND AMMONIA VAPOR...
Publication number
20100089110
Publication date
Apr 15, 2010
POWERSPAN CORP.
Joanna Duncan
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Application
REMOVAL OF CARBON DIOXIDE FROM FLUE GAS STREAMS USING MIXED AMMONIU...
Publication number
20100083828
Publication date
Apr 8, 2010
POWERSPAN CORP.
Joanna Duncan
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Application
Nox hg and so2 removal using ammonia
Publication number
20050002842
Publication date
Jan 6, 2005
Joanna Duncan
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Application
NOx, Hg, AND SO2 REMOVAL USING AMMONIA
Publication number
20040105802
Publication date
Jun 3, 2004
Powerspan Corp.
Joanna L. Duncan
F23 - COMBUSTION APPARATUS COMBUSTION PROCESSES
Information
Patent Application
NOx, Hg, and SO2 removal using ammonia
Publication number
20030175190
Publication date
Sep 18, 2003
Powerspan Corp.
Joanna L. Duncan
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Application
NOx, Hg, and SO2 removal using alkali hydroxide
Publication number
20030108472
Publication date
Jun 12, 2003
Powerspan Corp.
Joanna L. Duncan
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Application
Removing NOx, SO2, and Hg from a gas stream using limestone regener...
Publication number
20030108466
Publication date
Jun 12, 2003
Powerspan Corp.
Francis R. Alix
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Application
Sulfur dioxide removal using ammonia
Publication number
20030108469
Publication date
Jun 12, 2003
Powerspan Corp.
Francis R. Alix
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL