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Intl Class Technology Matters Rank in Class
 
  
 
C09K MATERIALS FOR APPLICATIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR194
 
  
 
F15D FLUID DYNAMICS, i.e. METHODS OR MEANS FOR INFLUENCING THE FLOW OF GASES OR LIQUIDS 110
 
  
 
G06T IMAGE DATA PROCESSING OR GENERATION, IN GENERAL 1134

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
5465323 Method for modelling a surface and device for implementing sameMay 20, 91Nov 07, 95[G06T]
5255716 Pipe rectifier for stabilizing fluid flowMay 23, 91Oct 26, 93[F15D]
5242899 Emulsfiying agent, reverse emulsions produced using this emulsifying agent and use of these emulsions in drilling wellsJan 27, 92Sep 07, 93[C09K]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5247828 Procedure and device for measurement of the gelling of paraffinic petroleum products, especially crude productsExpiredFeb 07, 92Sep 28, 93[G01N]
5207832 Lightened cement grout suitable for the cementation of hydrocarbon production wellsExpiredOct 11, 91May 04, 93[C04B]
5095466 Marine seismic prospectingExpiredOct 30, 90Mar 10, 92[G01V]
5075625 Procedure and device for the detection of inversions of the earth's magnetic field by means of measurement taken in a drill shaftExpiredOct 09, 90Dec 24, 91[G01V]
5052219 Procedure and cell for measuring coefficients of adhesion and friction of a drilling fluidExpiredFeb 09, 90Oct 01, 91[G01N]
4986350 Device for the seismic monitoring of an underground depositExpiredFeb 09, 90Jan 22, 91[E21B, G01V]
4975483 Process for treating an aqueous solution of acrylamide resin in order to enable it to gel slowly even at high temperatureExpiredOct 22, 87Dec 04, 90[C08L]
4877452 Compound cement, more particularly usable in bore holesExpiredApr 28, 88Oct 31, 89[C04B]
4859196 Underwater electric connectorExpiredJul 22, 88Aug 22, 89[H01R]
4852667 Pressure relief process for well-drillingExpiredJun 26, 87Aug 01, 89[E21B]
4839239 Metallic coating on an inorganic substrateExpiredNov 04, 87Jun 13, 89[B05D, B21D]
4823891 Stabilizer sleeve for drill stringExpiredAug 27, 87Apr 25, 89[E21B]
4824445 Method for recycling in a crude oil stabilization installation, which improves the production of liquefied petroleum gas coming from the associated gasesExpiredJan 28, 88Apr 25, 89[B01D]
4790768 Immersible electrical couplingExpiredMay 20, 87Dec 13, 88[H01R]
4784525 Apparatus for use in installing a piece of equipment horizontally on a submerged unit and for removing it therefromExpiredSep 29, 87Nov 15, 88[B63C]
4736624 Consistometer for analysis of rheological changeExpiredFeb 11, 87Apr 12, 88[G01N]
4732586 Asymmetric or composite polyquinoxaline base membranes, possible application to gaseous permeation and more particularly gaseous mixture fractionation, and mainly dehydration and deacidification of gases, especially gaseous hydrocarbonsExpiredFeb 10, 86Mar 22, 88[B01D]
4726422 Annular safety assembly for an oil well, especially a double production zone wellExpiredJan 27, 86Feb 23, 88[E21B]
4702837 Rotary vortex separator for a heterogeneous liquidExpiredDec 23, 86Oct 27, 87[B01D]
4699350 Valve and a process for removing a closure member of the valveExpiredMar 19, 86Oct 13, 87[F16K]

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