SDG, LLC

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
E21B EARTH OR ROCK DRILLING 1581
 
  
 
B02C CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN 332
 
  
 
H01B CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING, OR DIELECTRIC PROPERTIES 272
 
  
 
B23H WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL 120
 
  
 
E21C MINING OR QUARRYING121
 
  
 
G01V GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS 179
 
  
 
H01F MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES 183
 
  
 
H01J ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS 1127
 
  
 
H01S DEVICES USING STIMULATED EMISSION191
 
  
 
H03H IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS 170

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
9700893 Virtual electrode mineral particle disintegratorJul 29, 14Jul 11, 17[B02C, E21B, E21C]
9190190 Method of providing a high permittivity fluidDec 17, 12Nov 17, 15[H01B]
9016359 Apparatus and method for supplying electrical power to an electrocrushing drillJan 09, 12Apr 28, 15[E21B, E21C]
9010458 Pressure pulse fracturing systemDec 27, 11Apr 21, 15[B02C, H01B, B23H, E21B, E21C]
8789772 Virtual electrode mineral particle disintegratorJun 14, 11Jul 29, 14[B02C]
8616302 Pulsed electric rock drilling apparatus with non-rotating bit and directional controlMay 08, 12Dec 31, 13[E21B]
8567522 Apparatus and method for supplying electrical power to an electrocrushing drillDec 19, 12Oct 29, 13[E21B]
8186454 Apparatus and method for electrocrushing rockJul 14, 09May 29, 12[E21B]
8172006 Pulsed electric rock drilling apparatus with non-rotating bitAug 26, 08May 08, 12[E21B]
8083008 Pressure pulse fracturing systemAug 19, 05Dec 27, 11[E21B]

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
2015/0308,235 APPARATUS AND METHOD FOR SUPPLYING ELECTRICAL POWER TO AN ELECTROCRUSHING DRILLAbandonedApr 23, 15Oct 29, 15[E21B]
2014/0008,968 APPARATUSES AND METHODS FOR SUPPLYING ELECTRICAL POWER TO AN ELECTROCRUSHING DRILLAbandonedJul 05, 13Jan 09, 14[E21B]
4741405 Focused shock spark discharge drill using multiple electrodesExpiredJan 06, 87May 03, 88[E21B]

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