HER MAJESTY IN RIGHT OF CANADA AS REPRESENTED BY THE MINISTER OF ENVIRONMENT

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
B09C RECLAMATION OF CONTAMINATED SOIL 18
 
  
 
C02F TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE 154

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
5645374 Method for dehalogenating contaminated water and soilNov 27, 95Jul 08, 97[B09C, C02F]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5556545 Removal of arsenic from aqueous liquids with selected aluminaExpiredMar 03, 94Sep 17, 96[C02F]
5002784 Microwave-assisted natural products extractionExpiredMay 07, 90Mar 26, 91[A23L]
4781796 Apparatus for the conversion of sludgesExpiredMay 07, 87Nov 01, 88[C10B]
4668342 Recausticizing kraft green liquorExpiredDec 03, 85May 26, 87[C01F, D21C, C01D]
4652761 Grating ozone spectrophotometerExpiredDec 04, 84Mar 24, 87[G01J]
4618735 Process and apparatus for the conversion of sludgesExpiredAug 29, 84Oct 21, 86[C07C]
4544489 Process and apparatus for controlled addition of conditioning material to sewage sludgeExpiredJul 02, 84Oct 01, 85[C02F]
4300044 Method and apparatus for the analysis of chemical compounds in aqueous solution by mass spectroscopy of evaporating ionsExpiredMay 07, 80Nov 10, 81[B01D]

Top Inventors for This Owner

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