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Thomas A. Robertson
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Houston, TX, US
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Patents Grants
last 30 patents
Information
Patent Grant
Well fracturing systems with electrical motors and methods of use
Patent number
11,767,748
Issue date
Sep 26, 2023
STEWART & STEVENSON LLC
Mark Payne
E21 - EARTH DRILLING MINING
Information
Patent Grant
Well fracturing systems with electrical motors and methods of use
Patent number
11,408,267
Issue date
Aug 9, 2022
STEWART & STEVENSON LLC
Mark Payne
E21 - EARTH DRILLING MINING
Information
Patent Grant
Well fracturing systems with electrical motors and methods of use
Patent number
10,851,638
Issue date
Dec 1, 2020
STEWART & STEVENSON LLC
Mark Payne
E21 - EARTH DRILLING MINING
Information
Patent Grant
Well fracturing systems with electrical motors and methods of use
Patent number
10,246,984
Issue date
Apr 2, 2019
Mark Payne
E21 - EARTH DRILLING MINING
Information
Patent Grant
Method for controlling the density of a well fracturing slurry
Patent number
5,441,340
Issue date
Aug 15, 1995
Stewart & Stevenson Services, Inc.
Greg Cedillo
B28 - WORKING CEMENT, CLAY, OR STONE
Information
Patent Grant
Method and apparatus for automatically controlling a well fracturin...
Patent number
5,281,023
Issue date
Jan 25, 1994
Stewart & Stevenson Services, Inc.
Greg Cedillo
B28 - WORKING CEMENT, CLAY, OR STONE
Patents Applications
last 30 patents
Information
Patent Application
WELL FRACTURING SYSTEMS WITH ELECTRICAL MOTORS AND METHODS OF USE
Publication number
20220349295
Publication date
Nov 3, 2022
Stewart & Stevenson, LLC
MARK PAYNE
E21 - EARTH DRILLING MINING
Information
Patent Application
WELL FRACTURING SYSTEMS WITH ELECTRICAL MOTORS AND METHODS OF USE
Publication number
20200355058
Publication date
Nov 12, 2020
Stewart & Stevenson, LLC
MARK PAYNE
E21 - EARTH DRILLING MINING
Information
Patent Application
WELL FRACTURING SYSTEMS WITH ELECTRICAL MOTORS AND METHODS OF USE
Publication number
20190226317
Publication date
Jul 25, 2019
Stewart & Stevenson, LLC
MARK PAYNE
E21 - EARTH DRILLING MINING
Information
Patent Application
WELL FRACTURING SYSTEMS WITH ELECTRICAL MOTORS AND METHODS OF USE
Publication number
20160258267
Publication date
Sep 8, 2016
STEWART & STEVENSON, LLC
MARK PAYNE
E21 - EARTH DRILLING MINING