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CASING RUNNING AND DRILLING SYSTEM

10/794,795 | U.S. Patent Application

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Location ELECTRONIC
Filed March 5, 2004
Examiner KENNETH L THOMPSON
Class 166
Art Group 3672
Patent No. 7,191,840
Case Type Utility - 166/380000
Status Patent Expired Due to NonPayment of Maintenance Fees Under 37 CFR 1.362
Parent 60/451,964 Expired
Child 11/688,619 Patented
Last Updated: 6 years, 3 months ago
Date # Transaction