(19)
(11) EP 4 423 768 A1

(12)

(43) Date of publication:
04.09.2024 Bulletin 2024/36

(21) Application number: 22809015.5

(22) Date of filing: 21.10.2022
(51) International Patent Classification (IPC): 
G16H 30/40(2018.01)
G16H 50/20(2018.01)
(52) Cooperative Patent Classification (CPC):
G16H 30/40; G16H 50/20
(86) International application number:
PCT/EP2022/079331
(87) International publication number:
WO 2023/072743 (04.05.2023 Gazette 2023/18)
(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 ME MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA
Designated Validation States:
KH MA MD TN

(30) Priority: 28.10.2021 WO PCT/CN2021/126965
29.11.2021 EP 21210915

(71) Applicants:
  • Unilever IP Holdings B.V.
    3013 AL Rotterdam (NL)

    AL AT BE BG CH CZ DK EE ES FI FR GR HR HU IS LI LT LU LV MC ME MK NL NO PL PT RO SE SI SK SM 
  • Unilever Global IP Limited
    Wirral, Merseyside CH62 4ZD (GB)

    CY DE GB IE IT MT RS TR 

(72) Inventors:
  • HU, Wenchao
    6708 WH Wageningen (NL)
  • SUN, Yiwen
    6708 WH Wageningen (NL)
  • WANG, Shan
    6708 WH Wageningen (NL)
  • YANG, Hui
    6708 WH Wageningen (NL)

(74) Representative: Tansley, Sally Elizabeth 
Unilever Patent Group Bronland 14
6708 WH Wageningen
6708 WH Wageningen (NL)

   


(54) METHODS AND APPARATUS FOR DETERMINING A COLOUR VALUE OF TEETH