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Union Oil Company of California

Union Oil

Active Patents

0

Total Holdings

5

Patent Holdings

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Patent No.	Title	Status	Filing Date	Grant Date	Claims	Actions
US2650068A	Coring method and apparatus	Expired / Lapsed	1949-01-31	1953-08-25	0	Details
US2606003A	Off-shore drilling	Expired / Lapsed	1948-08-28	1952-08-05	0	Details
US2225668A	Method and apparatus for logging drill holes	Expired / Lapsed	1936-08-28	1940-12-24	0	Details
US1928969A	Well survey instrument	Expired / Lapsed	1930-10-15	1933-10-03	0	Details
US1739724A	Recording dynamometer and method of measuring load variatio…	Expired / Lapsed	1927-07-18	1929-12-17	0	Details