MIDWAY FISHING TOOL COMPANY A CA CORP.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4708201 Top entry electrical transmission assembly for submersible pumpingExpiredOct 29, 84Nov 24, 87[H01R, E21B]
4627489 Top entry electrical transmission safety assembly for submersible pumpingExpiredNov 13, 84Dec 09, 86[E21B]
4532987 Geothermal expansion spool pistonExpiredFeb 21, 84Aug 06, 85[E21B]
4491176 Electric power supplying well head assemblyExpiredOct 01, 82Jan 01, 85[E21B]
4479537 Power tubing hanger and tubing string lifting assemblyExpiredSep 26, 83Oct 30, 84[E21B]
4448247 Geothermal well head clean out and shut off assemblyExpiredSep 03, 82May 15, 84[E21B]
4391324 Geothermal well head and actuator assemblyExpiredAug 10, 81Jul 05, 83[E21B]
4342363 Geothermal well headExpiredNov 03, 80Aug 03, 82[E21B]
4327804 Geothermal well head assemblyExpiredJul 31, 80May 04, 82[F16L, E21B]

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