Nalco Canada Inc.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
 
 
C02F TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE 253

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
5230808 Liquid suspension of polyethylene oxide for use in treating paper and pulp wastewaterSep 24, 92Jul 27, 93[C02F]
5178770 Method of treating BCTMP/CTMP wastewaterJul 12, 91Jan 12, 93[C02F]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5810971 Liquid slurry of bentoniteExpiredOct 04, 96Sep 22, 98[D21H, C08K]
5629368 Liquid slurry of bentoniteExpiredMay 17, 95May 13, 97[C04B, C08K]
5484834 Liquid slurry of bentoniteExpiredNov 04, 93Jan 16, 96[C04B, C08K]
5342538 Liquid suspension of polyethylene oxide for use in treating paper and pulp wastewaterExpiredSep 09, 92Aug 30, 94[C09K, C02F]
5173208 Liquid suspension of polyethylene oxide for use in treating paper and pulp wastewaterExpiredJun 17, 91Dec 22, 92[C09K, C07F, B01D]
5126014 Retention and drainage aid for alkaline fine papermaking processExpiredJul 16, 91Jun 30, 92[D21H]

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