Placer Dome Technical Services Limited

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
C22B PRODUCTION OR REFINING OF METALS 1612
 
  
 
C01G COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F 336
 
  
 
E21C MINING OR QUARRYING319
 
  
 
B01D SEPARATION 2132
 
  
 
B01F MIXING, e.g. DISSOLVING, EMULSIFYING, DISPERSING 141
 
  
 
C01C AMMONIA; CYANOGEN; COMPOUNDS THEREOF 113
 
  
 
C02F TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE 154
 
  
 
C25C PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR 118
 
  
 
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
8821613 Method for thiosulfate leaching of precious metal-containing materialsFeb 04, 10Sep 02, 14[C22B]
8597399 Method for thiosulfate leaching of precious metal-containing materialsFeb 03, 11Dec 03, 13[C22B]
8097227 Method for thiosulfate leaching of precious metal-containing materialsJan 07, 10Jan 17, 12[C22B]
8029751 Reduction of lime consumption when treating refractory gold ores or concentratesOct 13, 09Oct 04, 11[C22B, C01G]
7722840 Method for thiosulfate leaching of precious metal-containing materialsNov 13, 03May 25, 10[C22B]
7704298 Method for thiosulfate leaching of precious metal-containing materialsApr 30, 04Apr 27, 10[C22B]
7695071 Automated excavation machineOct 15, 03Apr 13, 10[E21C]
7604783 Reduction of lime consumption when treating refractor gold ores or concentratesOct 11, 05Oct 20, 09[C22B]
7559974 Method for thiosulfate leaching of precious metal-containing materialsOct 29, 07Jul 14, 09[C22B]
7544232 Method for thiosulfate leaching of precious metal-containing materialsDec 19, 06Jun 09, 09[C22B]

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
2014/0047,954 METHOD FOR THIOSULFATE LEACHING OF PRECIOUS METAL-CONTAINING MATERIALSAbandonedOct 21, 13Feb 20, 14[C22B]
2006/0016,621 Method and system for deep sea drillingAbandonedJun 08, 05Jan 26, 06[E21B]
6857706 Mining method for steeply dipping ore bodiesExpiredDec 04, 02Feb 22, 05[E21C]
2004/0237,721 Anoxic leaching of precious metals with thiosulfate and precious metal oxidantsAbandonedMay 29, 03Dec 02, 04[C22B]
4979987 Precious metals recovery from refractory carbonate oresExpiredJul 19, 88Dec 25, 90[C22B, C01G]

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