Walker-Dawson Interests, Inc.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
B01D SEPARATION 2132
 
  
 
F04F PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED 212
 
  
 
B02C CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN 134

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
9375761 Methods for modifying non-standard frac sand to sand with fracking propertiesMay 21, 13Jun 28, 16[B02C, B08B]
7045068 Apparatus and methods for separating slurried materialMay 18, 05May 16, 06[B01D]
6911145 Apparatus and methods for separating slurried materialJul 19, 02Jun 28, 05[B01D]
6450775 Jet pumps and methods employing the sameNov 13, 00Sep 17, 02[F04F]
6322327 Jet pump for transfer of materialJan 13, 00Nov 27, 01[F04F]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
2011/0126,936 Vacuum container system and related methodAbandonedJan 07, 05Jun 02, 11[B65B]
2008/0044,294 IN-LINE JET PUMPS AND METHODS OF USEAbandonedAug 21, 06Feb 21, 08[F04F]
7243478 Vacuum system manifold and related methodsExpiredApr 04, 05Jul 17, 07[B65B]
6860042 Excavation system employing a jet pumpExpiredJul 19, 02Mar 01, 05[E02F]
6817837 Jet pump with recirculating motive fluidExpiredJul 19, 02Nov 16, 04[F04B]
2003/0176,179 Wireless local area network and antenna used thereinAbandonedMar 14, 03Sep 18, 03[H04B]

Top Inventors for This Owner

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