Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Lignosulfonates carboxylated with chloroacetic acid as additives in oil recovery processes involving chemical recovery agents

Lignosulfonates carboxylated with chloroacetic acid as additives in oil recovery processes involving chemical recovery agents

US Patent 4267886 · Granted May 19, 1981

Estimated economic value: $29,258,000 ⓘ

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Lignosulfonate-acrylic acid graft copolymers as sacrificial agents for carbon di2005
Conformance improvement in hydrocarbon bearing underground strata using lignosul2001
Method of using lignosulfonate-acrylic acid graft copolymers as sacrificial agen1993
Dialkylate additives for surfactant sytems1992
Method of using a combination lignosulfonate/polyalkylene glycol system as a sac1991
Deoxygenation of aqueous polymer solutions used in enhanced oil recovery process1989
Method of using a lignosulfonate/carbohydrate system as a sacrificial agent for 1986
Modified lignosulfonates as additives in oil recovery processes involving chemic1982
Surfactant fluid suitable for use in waterflood oil recovery method1982
Surfacant waterflooding oil recovery method1981
Surfactant waterflood method for the recovery of oil1981
Sulfomethylated lignosulfonates as additives in oil recovery processes involving1981