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on 03 Jul 2000
NL INDUSTRIES, INC.
73122037 · 08 Apr 1977
009
APPARATUS AND INSTRUMENTS FOR TESTING DRILLING MUD, WATER, CORROSION, ...
on 01 Nov 1991
NL Industries, Inc.
73497272 · 30 Aug 1984
001
Foundry Mold Wash Additive,Foundry Mold Wash Additive
on 22 Aug 1989
WESTERN GEOPHYSICAL COMPANY OF AMERICA
73531484 · 09 Apr 1985
042
RESERVOIR ENGINEERING AND GEOLOGICAL SERVICES RELATED TO THE PETROLEUM...
on 14 Aug 1989
NL Industries, Inc.
73347882 · 29 Jan 1982
001
Cellulose Derivatives for Use in Well Drilling, Workover and Completio...
on 14 Aug 1989
NL INDUSTRIES, INC.
73525749 · 07 Mar 1985
042
RESERVOIR ENGINEERING AND GEOLOGICAL SERVICES RELATED TO THE PETROLEUM...
on 30 Dec 1985
NL INDUSTRIES, INC.
73524779 · 01 Mar 1985
042
RECORDED LITHOLOGY LOGGING SERVICES TO THE OIL INDUSTRY COMPRISING PRO...
on 27 Aug 1985
NL INDUSTRIES, INC.
73495657 · 20 Aug 1984
001
EXTEND,DRILLING FLUID ADDITIVE,EXTEND,DRILLING FLUID ADDITIVE
on 27 Aug 1985
NL INDUSTRIES, INC.
73510340 · 23 Nov 1984
001
COLLOIDAL CLAYS, ESPECIALLY BENTONITE,COLLOIDAL CLAYS, ESPECIALLY BENT...
on 20 Aug 1985
NL INDUSTRIES, INC.
73497227 · 30 Aug 1984
001
DRILLING FLUID ADDITIVE,DRILLING FLUID ADDITIVE
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