Donaldson; R. Ashley

Patent Applications and Registrations

Patent applications and USPTO patent grants for Donaldson; R. Ashley.The latest application filed is for "wellbore fluids containing additives for removing a filter cake and methods of using the same".

Company Profile

0.7.5

Donaldson; R. Ashley - Houston TX
Donaldson; R. Ashley - Spring TX

*profile and listings may contain filings by different individuals or companies with the same name. Review application materials to confirm ownership/assignment.

Patent Activity

Patent	Date
Wellbore fluids containing additives for removing a filter cake and methods of using the same Grant 7,939,474 - Blauch , et al. May 10, 2	2011-05-10
Wellbore Fluids Containing Additives For Removing A Filter Cake And Methods Of Using The Same App 20070184988 - Blauch; Matthew E. ; et al.	2007-08-09
Wellbore fluids containing additives for removing a filter cake and methods of using the same Grant 7,222,672 - Blauch , et al. May 29, 2	2007-05-29
Apparatus and method for completing an interval of a wellbore while drilling Grant 7,108,083 - Simonds , et al. September 19, 2	2006-09-19
Expandable sand control screen and method for use of same Grant 7,048,048 - Nguyen , et al. May 23, 2	2006-05-23
Wellbore fluids containing additives for removing a filter cake and methods of using the same App 20050155761 - Blauch, Matthew E. ; et al.	2005-07-21
Expandable sand control screen and method for use of same App 20040261994 - Nguyen, Philip D. ; et al.	2004-12-30
Apparatus and method for completing an interval of a wellbore while drilling App 20040168799 - Simonds, Floyd Randolph ; et al.	2004-09-02
Expandable sand control device and specialized completion system and method Grant 6,766,862 - Chatterji , et al. July 27, 2	2004-07-27
Expandable sand control device and specialized completion system and method App 20030131997 - Chatterji, Jiten ; et al.	2003-07-17
Invert well service fluid and method Grant 6,562,764 - Donaldson , et al. May 13, 2	2003-05-13
Expandable sand control device and specialized completion system and method Grant 6,543,545 - Chatterji , et al. April 8, 2	2003-04-08

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