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on 28 Nov 2014
DSC, Inc.
78822589 · 24 Feb 2006
001
Chemical additives for oil well drilling fluids,Chemical additives for...
on 13 Jun 2014
DSC, Inc.
78822699 · 24 Feb 2006
001
THIN EASE,Chemical additives for oil well drilling fluids,THIN EASE,Ch...
on 24 Jul 2007
DSC, Inc.
78822669 · 24 Feb 2006
001
BORE EASE,Chemical additives to fluids used in shallow boring and tunn...
on 22 Mar 2003
DSC, INC.
74191855 · 05 Aug 1991
001
additives for oil well drilling fluids,additives for oil well drilling...
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