Use of anionic dispersion polymers as viscosity modifiers in aqueous drilling fluids

Details for Australian Patent Application No. 2003247539 (hide)

International Classifications

Event Publications

2 October 2003 Complete Application Filed

Priority application(s): 10/173,253 17.06.02 US

26 February 2004 Application Open to Public Inspection

Published as AU-B-2003247539

6 January 2005 Amendment Made

The nature of the amendment is: Amend co-inventor name from Hohnson, Cathy C. to Johnson, Cathy C.

8 January 2009 Application Accepted

Published as AU-B-2003247539

7 May 2009 Standard Patent Sealed

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