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US Patent 11661796 Sealing system for downhole tool

OverviewStructured DataIssuesContributorsActivity
Is a
Patent
Patent
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Current Assignee
The Charles Machine Works Inc.
The Charles Machine Works Inc.
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Date Filed
August 9, 2021
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Date of Patent
May 30, 2023
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Patent Applicant
The Charles Machine Works Inc.
The Charles Machine Works Inc.
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Patent Application Number
17397110
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Patent Citations
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US Patent 9611695 Dual pipe drilling head with improved bearing retention structure
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US Patent 7216724 Coupling for dual member pipe
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US Patent 7798496 Rotary shaft sealing assembly
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US Patent 9556691 Horizontal directional drilling system
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US Patent RE46746 Mud-lubricated bearing assembly with mechanical seal
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Patent Jurisdiction
United States Patent and Trademark Office
United States Patent and Trademark Office
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Patent Number
11661796
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Patent Primary Examiner
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D. Andrews
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CPC Code
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E21B 4/003
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F16C 19/54
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F16C 33/6677
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F16C 33/6625
0

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