STANDARD OIL PRODUCTION COMPANY

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4916616 Self-consistent log interpretation methodExpiredDec 08, 86Apr 10, 90[G06F]
4886395 Pipeline to riser connection method and apparatusExpiredJul 02, 87Dec 12, 89[E16L, E21B]
4850449 Piezoelectric seismic vibration device and methodExpiredJun 16, 86Jul 25, 89[G01V]
4829816 Method and apparatus for testing spotting fluids for releasing stuck drill pipeExpiredNov 06, 87May 16, 89[E21B]
4750157 Seismic vibrator earth impedance determination and compensation systemExpiredMay 06, 87Jun 07, 88[G01V]

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