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Standard Oil Co

Standard O
Active Patents
0
Total Holdings
3

Patent Holdings

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Patent No. Title Status Filing Date Grant Date Claims Actions
US3135591A Separation of helium from a gaseous mixture by means of a n… Expired / Lapsed 1960-09-08 1964-06-02 1 Details
US2187871A Underwater drilling Expired / Lapsed 1937-08-09 1940-01-23 0 Details
US2171672A Underwater drilling Expired / Lapsed 1937-09-30 1939-09-05 0 Details