Nova Patents
ZA85808B

Hydrophobic associative composition containing a polymer of a water-soluble monomer and an amphiphilic monomer

Abstract

A hydrophobe associative composition of an ethylenically unsaturated, water-soluble monomer such as acrylamide and an ethylenically unsaturated amphiphilic monomer such as dodecyl poly(oxyethylene)10 methacrylate which is particularly effective for increasing the viscosity of brines or other aqueous media contaning salts or other electrolytes. Such copolymers are therefor useful in mobility control fluids and fracturing fluids for enhanced oil recovery and as drag reduction agents.

Term

Term ended

Expired 1 February 2005, 21.6 years ago.

  1. Priority
  2. Filed
  3. Granted
  4. Expired
  5. Today

23 members in 15 offices

This recordMember, by publication datePriority claim5 more offices are in the list below

Priority claims4

Priority claims
DocumentOfficeKindDate
57625084United States of AmericaA
57625084United States of AmericaA
84576250–––
US19840576250–––

Members23

Family members, oldest first
DocumentOfficeKind
WO8503510A1World Intellectual Property Organization (WIPO)A1
AU3995085AAustraliaA
DK446185ADenmarkA
DK446185D0DenmarkD0
NO853876LNorwayL
BR8505157ABrazilA
EP0171429A1European Patent Office (EPO)A1
JPS61500796AJapanA
EP0171429A4European Patent Office (EPO)A4
ZA85808BThis recordSouth AfricaB
AU560102B2AustraliaB2
OA08110AAfrican Intellectual Property Organization (OAPI)A
IT1186180BItalyB
IT8519334A0ItalyA0
IT8519334D0ItalyD0
EP0171429B1European Patent Office (EPO)B1
CA1260195ACanadaA
DE3572988D1GermanyD1
US4921902AUnited States of AmericaA
SU1588285A3Soviet Union (until 1991)A3
NO166947BNorwayB
NO166947CNorwayC
MY103010AMalaysiaA