CAMCO DRILLING GROUP LIMITED

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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
 
  
 
G01R MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES 1158
 
  
 
G01S RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES1108
 
  
 
H01L SEMICONDUCTOR DEVICES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR 1361

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
5875849 Apparatus and method for recompleting wells with coiled tubingJul 08, 97Mar 02, 99[E21B]
5780317 Apparatus for forming oxide film of semiconductor deviceDec 24, 96Jul 14, 98[H01L, G01R]
5244039 Rotary drill bitsOct 31, 91Sep 14, 93[E21B]
5182563 Enhanced performance mode S interrogatorNov 01, 91Jan 26, 93[G01S]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6116355 Choke deviceExpiredJul 22, 97Sep 12, 00[E21B]
5487436 Cutter assemblies for rotary drill bitsExpiredJan 18, 94Jan 30, 96[E21B]
5348109 Cutter assemblies and cutting elements for rotary drill bitsExpiredOct 05, 93Sep 20, 94[E21B]
5165494 Rotary drills bitsExpiredNov 21, 90Nov 24, 92[E21B]

Top Inventors for This Owner

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