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Drilling Specialties Co

Drilling S

Active Patents

0

Total Holdings

4

Patent Holdings

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Patent No.	Title	Status	Filing Date	Grant Date	Claims	Actions
US4440228A	Gelled compositions and well treating	Expired / Lapsed	1982-01-28	1984-04-03	11	Details
US4425241A	Drilling fluids	Expired / Lapsed	1981-12-16	1984-01-10	24	Details
US4240505A	Well acidizing compositions and methods	Expired / Lapsed	1978-05-04	1980-12-23	26	Details
US4191657A	Compositions for acidizing subterranean formations	Expired / Lapsed	1978-05-02	1980-03-04	10	Details