CITIES SERVICE COMPANY, A DE CORP.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4703797 Sweep improvement in enhanced oil recoveryExpiredFeb 21, 86Nov 03, 87[E21B]
4517101 Reduced biodegradability in a polymer flood processExpiredAug 22, 83May 14, 85[E21B]
4501445 Method of in-situ hydrogenation of carbonaceous materialExpiredAug 01, 83Feb 26, 85[E21B, E21C]
4463988 Horizontal heated plane processExpiredSep 07, 82Aug 07, 84[E21B, E21C]
4452091 Soil gas probeExpiredJun 23, 82Jun 05, 84[G01N]
4452234 Collapsible mobile solar energy power sourceExpiredSep 27, 83Jun 05, 84[H01L, F24J]
4444276 Underground radial pipe networkExpiredNov 24, 80Apr 24, 84[E21B]
4435518 Polymerization catalystExpiredNov 24, 82Mar 06, 84[C08F]
4435519 Novel catalyst compositionExpiredNov 24, 82Mar 06, 84[C08F]
4435520 Catalyst compositionExpiredNov 24, 82Mar 06, 84[C08F]
4434242 Polymerization catalystExpiredNov 24, 82Feb 28, 84[C08F]
4430457 Cling/stretch wrap compositionsExpiredMay 10, 82Feb 07, 84[C08K]
4426317 Process for making olefin polymerization catalystExpiredNov 24, 82Jan 17, 84[C08F]
4422317 Apparatus and process for selectively expanding a tubeExpiredJan 25, 82Dec 27, 83[B21D]
4420866 Apparatus and process for selectively expanding to join one tube into another tubeExpiredJan 25, 82Dec 20, 83[B23P, B21D]
4421943 Collapsible mobile solar energy power sourceExpiredFeb 19, 82Dec 20, 83[H01L, F24J]
4418457 Apparatus and process for expanding to join a tube into a tube sheet openingExpiredJan 21, 82Dec 06, 83[B23P, B21D]
4415034 Electrode well completionExpiredMay 03, 82Nov 15, 83[E21B]
4415431 Integrated oxygasification and hydropyrolysis process for producing liquid and gaseous hydrocarbonsExpiredJul 14, 82Nov 15, 83[C10G]
4412585 Electrothermal process for recovering hydrocarbonsExpiredMay 03, 82Nov 01, 83[E21B]

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