Roy E. Roth Company

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
F01D NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES 164
 
  
 
F04B POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS 161
 
  
 
F16J PISTONS; CYLINDERS; PRESSURE VESSELS IN GENERAL; SEALINGS149

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
6190119 Multi-channel regenerative pumpJul 29, 99Feb 20, 01[F01D]
5934683 Rotary seal assembly having grooved seal facingJul 10, 97Aug 10, 99[F16J]
5525039 Hermetically sealed magnetic drive pumpJul 21, 93Jun 11, 96[F04B]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
2014/0097,372 Flow Rate and Pressure Reduction AssemblyAbandonedOct 04, 13Apr 10, 14[G05D]
2014/0086,768 Drain Vent for Petroleum/Chemical Pumping Devices and Methods of Making the SameAbandonedSep 24, 13Mar 27, 14[F01B]
5238253 Regenerative turbine flow inducer for double or tandem mechanical sealsExpiredApr 22, 91Aug 24, 93[F16J]
5137418 Floating self-centering turbine impellerExpiredDec 21, 90Aug 11, 92[F16C, F04D]
4479756 Multi-stage pumpExpiredJan 17, 83Oct 30, 84[F04D]
4299536 Multi-stage pumpsExpiredAug 09, 79Nov 10, 81[F04D]
4248571 Centrifugal impellersExpiredSep 11, 78Feb 03, 81[F04D]

Top Inventors for This Owner

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