PROSERV OPERATIONS, INC.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
E21B EARTH OR ROCK DRILLING 294
 
  
 
F15B SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR 243
 
  
 
G05D SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES 183

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
9051824 Multiple annulus universal monitoring and pressure relief assembly for subsea well completion systems and method of using sameApr 16, 12Jun 09, 15[E21B]
8631873 Tubing hanger—production tubing suspension arrangementMar 04, 11Jan 21, 14[E21B]
5901749 Three-way poppet valveMar 19, 97May 11, 99[F15B]
5771931 High pressure wear resistant pilot valveOct 31, 96Jun 30, 98[F15B]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
2015/0309,515 DUAL PRESSURE SHUTTLE VALVEAbandonedApr 29, 14Oct 29, 15[G05D]
2011/0073,792 Hemispherical Wedge Valve with Laminar FlowAbandonedSep 24, 10Mar 31, 11[F16K]

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