← Back to Companies

Shell Development Co

Shell Deve

Active Patents

0

Total Holdings

5

Patent Holdings

Filter in Explorer →

Patent No.	Title	Status	Filing Date	Grant Date	Claims	Actions
US2707440A	Oil well pump control system	Expired / Lapsed	1951-07-21	1955-05-03	0	Details
US2665885A	Apparatus for offshore coring	Expired / Lapsed	1948-10-25	1954-01-12	0	Details
US2616020A	Automatic temperature control	Expired / Lapsed	1950-03-07	1952-10-28	0	Details
US2550093A	Oil well control system	Expired / Lapsed	1949-03-15	1951-04-24	0	Details
US2326442A	Gas-lift control	Expired / Lapsed	1941-08-05	1943-08-10	0	Details