C - Chemistry – Metallurgy – 09 – K
Patent
C - Chemistry, Metallurgy
09
K
31/31
C09K 8/32 (2006.01)
Patent
CA 1205992
150-4670 IMPROVEMENTS IN OR RELATING TO ORGANIC COMPOUNDS Abstract of the Disclosure A fluid loss reducing additive for an oil-based well working fluid is the product or mixing together, in an oil or oil-based fluid, lignite or humic acid with an aliphatic amide or hydroxy- amide, or a cyclic derivative thereof, containing no primary or secondary amine or amine salt groups.
424654
Coates Jacqueline A.
Connell David L.
Kirby Eades Gale Baker
Sandoz Ltd.
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