WHEELABRATOR CLEAN WATER SYSTEMS INC.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
B01D SEPARATION 1133
 
  
 
C05F ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE111

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
RE33998 Apparatus and process for producing an organic product from sewage sludgeMay 21, 90Jul 21, 92[C05F, B01D]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5337496 Sludge treatment processExpiredMay 14, 92Aug 16, 94[F26B]
4989344 Particulate removal for a sludge treatment processExpiredAug 04, 88Feb 05, 91[F26B]
4956926 Sludge treatment processExpiredMay 18, 89Sep 18, 90[F26B]
4953478 Odor control for a sludge treatment processExpiredMay 09, 89Sep 04, 90[F23J]
4860671 Odor control for a sludge treatment processExpiredJul 18, 88Aug 29, 89[F23J, F26B]
4852269 Combined sewage and lime slude treatment processExpiredSep 12, 88Aug 01, 89[F26B]
4829678 Sludge treatment processExpiredAug 08, 88May 16, 89[F26B]
4761891 Method and appartus for machining a screw thread with little dispersionExpiredNov 10, 87Aug 09, 88[B43L]

Top Inventors for This Owner

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