(19)
(11) EP 4 069 808 A1

(12)

(43) Date of publication:
12.10.2022 Bulletin 2022/41

(21) Application number: 20793521.4

(22) Date of filing: 01.10.2020
(51) International Patent Classification (IPC): 
C10M 129/70(2006.01)
C10N 30/02(2006.01)
C10N 30/08(2006.01)
 C10M 141/02(2006.01)
C10N 30/06(2006.01)
C10N 40/04(2006.01)
(52) Cooperative Patent Classification (CPC):
C10M 129/70; C10M 141/02; C10M 2207/281; C10M 2207/282; C10M 2203/1006; C10M 2205/0285; C10M 2209/084; C10M 2205/02; C10N 2030/08; C10N 2030/06; C10N 2030/02; C10N 2040/04
 
C-Sets:
C10M 2203/1006, C10N 2020/02;
(86) International application number:
PCT/US2020/053670
(87) International publication number:
WO 2021/112946 (10.06.2021 Gazette 2021/23)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME
Designated Validation States:
KH MA MD TN

(30) Priority: 04.12.2019 US 201962943453 P

(71) Applicant: The Lubrizol Corporation
Wickliffe, Ohio 44092-2298 (US)

(72) Inventors:
  • SALEM, Kamalakumari K.
    Wickliffe, Ohio 44092-2298 (US)
  • BARTON, William R.S.
    Belper Derbyshire DE56 1QN (GB)
  • CORRIGAN, Thomas S.
    Wickliffe, Ohio 44092-2298 (US)
  • SIVAKOVA, Sona
    Wickliffe, Ohio 44092-2298 (US)

(74) Representative: D Young & Co LLP 
120 Holborn
London EC1N 2DY
London EC1N 2DY (GB)

   


(54) USE OF ESTER BASE STOCKS TO IMPROVE VISCOSITY INDEX AND EFFICIENCY IN DRIVELINE AND INDUSTRIAL GEAR LUBRICATING FLUIDS