Frank E. Evans — 10 Patents at Chevron

Frank E. Evans has been granted 10 US patents while listed as an inventor at Chevron. The first was granted in 2002 and the most recent in March 2017. Frank E. Evans ranks #481,000 of 4,157,543 US inventors in our database (top 11.6%). Patent records list Frank E. Evans in Diemelstraße, TX, US.

Issued Patents All Time

Showing 1–10 of 10 patents

Patent #	Title	Co-Inventors	Date	Approx Value ⓘ
9598627	Fluid loss additives and methods of making and using same	Jeffery R. Harris	2017-03-21
9353306	Viscoelastic surfactant based wellbore fluids and methods of use	Charles Svoboda, LaTosha Moore	2016-05-31
9328280	Additives for oil-based drilling fluids	Marshall D. Bishop, Willie P. Reneau, John E. Anderson	2016-05-03
9034800	Fluid loss additives and methods of making and using same	Jeffery R. Harris	2015-05-19
8937034	Viscoelastic surfactant based wellbore fluids and methods of use	Charles Svoboda, LaTosha Moore	2015-01-20
8871097	Reclamation of formate brines	Hui Zhang, Robert L. Horton, Charles Svoboda	2014-10-28
8575072	Fluid loss additives and methods of making and using same	Jeffery R. Harris	2013-11-05
7152697	Delayed phase changing agent for invert emulsion drilling fluid	Robert L. Horton, Bethicia B. Prasek, Taylor Green, Mark Luyster, Steve Mason	2006-12-26
6855671	Water based fluids comprising multivalent salts and low molecular weight, low charge cationic polyacrylamide copolymers	James Norfleet, Michael A. Jarrett, Patricia A. Potts, Tao Xiang	2005-02-15	$28,171,000
6355600	Shale stabilizing drilling fluids comprising calcium chloride and low molecular weight low charge cationicpolyacrylamide copolymers	James Norfleet, Michael A. Jarrett, Patricia A. Potts, Tao Xiang	2002-03-12	$45,823,000

Frank E. Evans — 10 Patents

Issued Patents All Time

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