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Western Atlas International Inc

Western At

Active Patents

0

Total Holdings

14

Patent Holdings

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Patent No.	Title	Status	Filing Date	Grant Date	Claims	Actions
US5640371A	Method and apparatus for beam steering and bessel shading o…	Expired / Lapsed	1995-11-22	1997-06-17	47	Details
US5089989A	Method and apparatus for measuring the quality of a cement …	Expired / Lapsed	1990-10-30	1992-02-18	2	Details
US4870422A	Method and system for determining position from signals fro…	Expired / Lapsed	1986-08-11	1989-09-26	46	Details
US4809005A	Multi-antenna gas receiver for seismic survey vessels	Expired / Lapsed	1988-01-21	1989-02-28	10	Details
US4686625A	Method and apparatus for generating a display of well loggi…	Expired / Lapsed	1984-09-07	1987-08-11	22	Details
US4263509A	Method for in situ determination of the cation exchange cap…	Expired / Lapsed	1979-02-26	1981-04-21	10	Details
US4152691A	Seismic recording method using separate recording units for…	Expired / Lapsed	1977-09-26	1979-05-01	13	Details
US4117448A	Seismic telemetric system for land operations	Expired / Lapsed	1977-04-13	1978-09-26	21	Details
US4072923A	Multichannel seismic telemeter system and array former	Expired / Lapsed	1976-03-08	1978-02-07	6	Details
US3990036A	Multiplexing method and apparatus for telemetry of seismic …	Expired / Lapsed	1974-02-28	1976-11-02	12	Details
US3824533A	Digital count rate meter and depth delay system for well lo…	Expired / Lapsed	1972-09-18	1974-07-16	4	Details
US3792430A	Digital count rate meter and depth delay system for well lo…	Expired / Lapsed	1972-09-18	1974-02-12	7	Details
US3662325A	Method of displaying seismic data	Expired / Lapsed	1969-08-27	1972-05-09	25	Details
US3611799A	Multiple chamber earth formation fluid sampler	Expired / Lapsed	1969-10-01	1971-10-12	0	Details