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Abdel-Rahman Mahmoud
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Sugar Land, TX, US
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Patents Grants
last 30 patents
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Patent Grant
Compliant dart-style reverse-flow check valve
Patent number
9,273,541
Issue date
Mar 1, 2016
Schlumberger Technology Corporation
Abdel-Rahman Mahmoud
Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
Information
Patent Grant
Compliant dart-style reverse-flow check valve
Patent number
8,919,446
Issue date
Dec 30, 2014
Schlumberger Technology Corporation
Abdel-Rahman Mahmoud
E21 - EARTH DRILLING MINING
Information
Patent Grant
Compliant dart-style reverse-flow check valve
Patent number
8,561,703
Issue date
Oct 22, 2013
Schlumberger Technology Corporation
Abdel-Rahman Mahmoud
Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
Patents Applications
last 30 patents
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Patent Application
Compliant Dart-Style Reverse-Flow Check Valve
Publication number
20150047851
Publication date
Feb 19, 2015
SCHLUMBERGER TECHNOLOGY CORPORATION
Abdel-Rahman Mahmoud
E21 - EARTH DRILLING MINING
Information
Patent Application
Compliant Dart-Style Reverse-Flow Check Valve
Publication number
20140034326
Publication date
Feb 6, 2014
SCHLUMBERGER TECHNOLOGY CORPORATION
Abdel-Rahman Mahmoud
E21 - EARTH DRILLING MINING
Information
Patent Application
COMPLIANT DART-STYLE REVERSE-FLOW CHECK VALVE
Publication number
20100319924
Publication date
Dec 23, 2010
SCHLUMBERGER TECHNOLOGY CORPORATION
Abdel-Rahman Mahmoud
E21 - EARTH DRILLING MINING