Nova Patents
NO176403C

Oil-based well bore fluids and gellants therefor.

Abstract

An invert emulsion drilling fluid comprised of a liquid oleaginous medium, water, an emulsifier and a gellant comprised of sulfonated ethylene/propylene/5-phenyl-2-norbornene terpolymer and an organophilic clay.

Term

No projected expiry on record.

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

41 members in 18 offices

This recordMember, by publication datePriority claim8 more offices are in the list below

Priority claims3

Priority claims
DocumentOfficeKindDate
13514087United States of AmericaA
135140–––
US19870135140–––

Members41

Family members, oldest first
DocumentOfficeKind
NO885575D0NorwayD0
DK703288D0DenmarkD0
DK703288ADenmarkA
NO885575LNorwayL
EP0321130A2European Patent Office (EPO)A2
CN1034018AChinaA
AU2649588AAustraliaA
BR8806579ABrazilA
BR8806579ABrazilA
JPH01221483AJapanA
EP0321130A3European Patent Office (EPO)A3
AU610300B2AustraliaB2
US5021170AUnited States of AmericaA
MX164304BMexicoB
CA1314702CCanadaC
EP0321130B1European Patent Office (EPO)B1
MY104075AMalaysiaA
DE3885251D1GermanyD1
ES2045148T3SpainT3
DE3885251T2GermanyT2
NO176403BNorwayB
NO176403CThis recordNorwayC
CN1030325CChinaC
EG19728AEgyptA
WO2011073365A1World Intellectual Property Organization (WIPO)A1
EP2382248A1European Patent Office (EPO)A1
CN102686619AChinaA
KR20120104611ARepublic of KoreaA
US2012252988A1United States of AmericaA1
MX2012006781AMexicoA
EP2382248B1European Patent Office (EPO)B1
DK2382248T3DenmarkT3
PT2382248EPortugalE
EA201290434A1Eurasian Patent Organization (EAPO)A1
ES2397270T3SpainT3
US8546496B2United States of AmericaB2
KR101514983B1Republic of KoreaB1
CN102686619BChinaB
BR112012014851A2BrazilA2
EA023158B1Eurasian Patent Organization (EAPO)B1
BR112012014851B1BrazilB1