CENTER ROCK, INC.

Patent Owner

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
E21B EARTH OR ROCK DRILLING 1185
 
  
 
B23P OTHER WORKING OF METAL; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS 155
 
  
 
1509 MACHINE TOOLS, ABRADING AND FOUNDING MACHINERY128

Top Patents (by citation)

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Recent Publications

Publication # Title Filing Date Pub Date Intl Class
2016/0222,732 DOWN-THE-HOLE DRILL HAMMER HAVING A ROLLER RAMP CLUTCHFeb 03, 16Aug 04, 16[E21B]

Recent Patents

Patent # Title Filing Date Issue Date Intl Class
9821422 Drill bit for a down-the-hole drill hammer having spirally arranged cutting insertsMay 21, 15Nov 21, 17[B23P, E21B]
8915314 Down-the-hole drill drive couplingMar 31, 09Dec 23, 14[E21B]
8800690 Down-the-hole drill hammer having a reverse exhaust system and segmented chuck assemblyNov 18, 09Aug 12, 14[E21B]
8631884 Pressure reversing valve assembly for a down-the-hole percussive drilling apparatusJun 04, 10Jan 21, 14[E21B]
8622152 Down-the-hole drill hammer having a sliding exhaust check valveOct 21, 10Jan 07, 14[E21B]
8439135 Down-the-hole drill hammer having an extendable drill bit assemblyApr 01, 11May 14, 13[E21B]
8397839 Self-indexing down-the-hole drillJun 30, 09Mar 19, 13[E21B]
8302707 Down-the-hole drill reverse exhaust systemJan 28, 09Nov 06, 12[E21B]
D656974 Drill bitJul 07, 11Apr 03, 12[1509]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6827162 Self-retaining downhole-hammer drill bitExpiredOct 30, 02Dec 07, 04[E21B]

Top Inventors for This Owner

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