HUGHES TOOL COMPANY

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
B21K MAKING FORGED OR PRESSED PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS, WHEELS 122
 
  
 
B24D TOOLS FOR GRINDING, BUFFING, OR SHARPENING 129
 
  
 
B66C CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES 130
 
  
 
E21B EARTH OR ROCK DRILLING 195

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
5173090 Rock bit compact and method of manufactureMar 01, 91Dec 22, 92[B24D]
5159857 Fixed cutter bit with improved diamond filled compactsMar 01, 91Nov 03, 92[B21K]
T105101 Casing handling equipmentJun 09, 83Feb 05, 85[E21B, B66C]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5129471 Earth boring bit with protected seal meansExpiredMay 31, 91Jul 14, 92[F16C, E21B, F16J]
5128080 Method of forming diamond impregnated carbide via the in-situ conversion of dispersed graphiteExpiredAug 30, 90Jul 07, 92[C04B]
5119714 Rotary rock bit with improved diamond filled compactsExpiredMar 01, 91Jun 09, 92[B21K]
5038640 Titanium carbide modified hardfacing for use on bearing surfaces of earth boring bitsExpiredFeb 08, 90Aug 13, 91[B21K, C22C]
5015401 Bearings grease for rock bit bearingsExpiredOct 16, 90May 14, 91[C10M]
4984643 Anti-balling earth boring bitExpiredMar 21, 90Jan 15, 91[E21B]
4953641 Two cone bit with non-opposite conesExpiredApr 27, 89Sep 04, 90[E21B]
4923020 Rock bit with rigid face seals and recessed energizersExpiredJun 23, 88May 08, 90[E21B]
4914433 Conductor system for well bore data transmissionExpiredApr 19, 88Apr 03, 90[G01V]
4903777 Dual seal packer for corrosive environmentsExpiredAug 26, 87Feb 27, 90[E21B]
4903786 Earth boring bit with improved two piece bearing and seal assemblyExpiredJun 23, 88Feb 27, 90[E21B]
4899838 Earth boring bit with convergent cutter bearingExpiredNov 29, 88Feb 13, 90[E21B]
4887675 Earth boring bit with pin mounted compensatorExpiredAug 08, 88Dec 19, 89[E21B]
4884071 Wellbore tool with hall effect couplingExpiredNov 28, 88Nov 28, 89[G01V]
4865135 Top drive torque reactorExpiredMay 20, 88Sep 12, 89[E21B]
4866245 Method for manufacturing a rotary rock bit with improved weld root geometryExpiredJun 02, 88Sep 12, 89[B23K]
4845493 Well bore data transmission system with battery preserving switchExpiredNov 04, 87Jul 04, 89[G01V]
4842069 Apparatus and method for cementing a liner in a well boreExpiredJan 25, 88Jun 27, 89[E21B]
4838758 Reduced diameter downthrust pad for a centrifugal pumpExpiredDec 28, 87Jun 13, 89[F04D]
4834174 Completion system for downhole steam generatorExpiredNov 17, 87May 30, 89[E21B]

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