Powerspan Corp.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
B03C MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS 120
 
  
 
C01B NON-METALLIC ELEMENTS; COMPOUNDS THEREOF178

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
6117403 Barrier discharge conversion of Hg, SO.sub.2 and NOxDec 29, 98Sep 12, 00[B03C]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
2013/0269,525 Absorption Media for Scrubbing CO2 from a Gas Stream and Methods Using the SameAbandonedMay 31, 11Oct 17, 13[B01D]
8092270 Tubulation-free gas filled electrode or lampExpiredApr 06, 09Jan 10, 12[H01J]
8071043 Electrode cap for electrical discharge reactorExpiredJan 18, 08Dec 06, 11[H01J, H01K, B01J]
2011/0125,326 USING RAMAN SPECTROSCPPY TO CONTROL CARBONATE/BICARBONATE CONCENTRATIONSAbandonedJul 28, 09May 26, 11[C12Q, G01J]
2011/0110,841 METHOD AND APPARATUS FOR PRODUCING AMMONIUM CARBONATE FROM UREAAbandonedAug 22, 08May 12, 11[C01C, B01J]
2011/0052,453 REMOVAL OF CARBON DIOXIDE FROM A FLUE GAS STREAMAbandonedOct 31, 08Mar 03, 11[B03C, G01J, B01D]
2010/0319,542 SCRUBBING OF AMMONIA WITH UREA AMMONIUM NITRATE SOLUTIONAbandonedJul 11, 08Dec 23, 10[B01D]
2010/0089,110 CARBON DIOXIDE SCRUBBING WITH AMMONIUM CARBONATE AND AMMONIA VAPOR CONTROLAbandonedMay 09, 08Apr 15, 10[C05C, B01D]
2010/0083,828 REMOVAL OF CARBON DIOXIDE FROM FLUE GAS STREAMS USING MIXED AMMONIUM/ALKALI SOLUTIONSAbandonedMay 01, 08Apr 08, 10[B03C, B01D]
7399453 Discharge reactor fuse linkExpiredNov 15, 02Jul 15, 08[B01J]
7052662 NOx, Hg, and SO.sub.2 removal using alkali hydroxideExpiredJun 28, 02May 30, 06[B01D]
7048899 Removing NOx, SO.sub.2, and Hg from a gas stream using limestone regenerationExpiredAug 12, 02May 23, 06[B01D]
6991771 NOx, Hg, and SO2 removal using ammoniaExpiredDec 05, 03Jan 31, 06[C01B]
6936231 NOx, Hg, and SO2 removal using ammoniaExpiredDec 06, 01Aug 30, 05[B01D]
6605263 Sulfur dioxide removal using ammoniaExpiredJan 31, 02Aug 12, 03[C01B]
6132692 Barrier discharge conversion of SO.sub.2 and NOx to acidsExpiredFeb 16, 99Oct 17, 00[C25B, B01D]
5920474 Power supply for electrostatic devicesExpiredMay 19, 97Jul 06, 99[H02M]
5903450 Electrostatic precipitator power supply circuit having a T-filter and pi-filterExpiredApr 13, 98May 11, 99[H02M]
5871703 Barrier discharge conversion of SO.sub.2 and NOx to acidsExpiredOct 09, 97Feb 16, 99[C25B, B01D]
5740024 Two-stage, high voltage inductorExpiredNov 27, 96Apr 14, 98[G05F]

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