US Patent 8978772 Casing hanger lockdown with conical lockdown ring
Is a
Date Filed
December 7, 2011
0
Date of Patent
March 17, 2015
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Patent Application Number
13313160
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Patent Inventor Names
Chad Eric Yates
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Daniel Caleb Benson
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David L. Ford
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Patent Jurisdiction
Patent Number
Patent Primary Examiner
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