SOUTHERN CALIFORNIA GAS COMPANY

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
B09C RECLAMATION OF CONTAMINATED SOIL 18
 
  
 
E21B EARTH OR ROCK DRILLING 195
 
  
 
G01F MEASURING VOLUME, VOLUME FLOW, MASS FLOW, OR LIQUID LEVEL; METERING BY VOLUME 158

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
5769569 In-situ thermal desorption of heavy hydrocarbons in vadose zoneJun 18, 96Jun 23, 98[B09C, E21B]
5654505 Gas meter cabinet and unitary manifoldOct 12, 94Aug 05, 97[G01F]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
7954194 Pig extracting deviceExpiredDec 14, 07Jun 07, 11[B08B]
2011/0126,549 Ultra low emissions fast starting power plantAbandonedNov 09, 10Jun 02, 11[F02C, F02G]
6126369 Hot tap toolExpiredMay 09, 94Oct 03, 00[B23B]
5844134 Gas meter cabinet and unitary manifoldExpiredAug 05, 97Dec 01, 98[G01F]
5595207 Tension actuated gas shutoff valveExpiredOct 19, 94Jan 21, 97[F16K]
5427525 Lox NO.sub.x staged atmospheric burnerExpiredJul 01, 93Jun 27, 95[F23D]
5240404 Ultra low NO.sub.x industrial burnerExpiredFeb 03, 92Aug 31, 93[F23M]
5146061 Electrode for an electric discharge machining apparatusExpiredOct 07, 91Sep 08, 92[B23H]
5127267 Acoustic method for locating concealed pipeExpiredJan 18, 91Jul 07, 92[G01S]
5126654 Non-invasive, high resolution detection of electrical currents and electrochemical impedances at spaced localities along a pipelineExpiredApr 02, 90Jun 30, 92[G01N]
5087873 Non-invasive, high resolution detection of electrical currents and electrochemical impedances at spaced localities along a pipelineExpiredApr 24, 91Feb 11, 92[G01N, C23F]
5052921 Method and apparatus for reducing NO.sub.x emissions in industrial thermal processesExpiredSep 21, 90Oct 01, 91[F27D, F23C]
4703767 Method and apparatus for pneumatic-tool maintenanceExpiredAug 20, 85Nov 03, 87[B08B]
4520265 Method and apparatus for accurate remote monitoring of gasesExpiredSep 06, 83May 28, 85[G01J]
4497362 Regenerative room air exchangerExpiredMar 21, 83Feb 05, 85[F24D, F24F]
4448545 Non-intrusive thermal power monitor and methodExpiredMar 02, 82May 15, 84[G01K]
4432791 Ceramic radiant tube heated aluminum melter and method of melting aluminiumExpiredMar 04, 83Feb 21, 84[F27B, C21C]
4412523 Catalytic gas-fired furnace system and methodExpiredOct 05, 81Nov 01, 83[F24C]
4333524 High efficiency furnaceExpiredFeb 09, 81Jun 08, 82[F28B, F28D, F22B]
4319628 Two liquid heat exchange system and safety valve to prevent contaminationExpiredJul 13, 79Mar 16, 82[G05D]

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