(19)
(11) EP 4 093 892 A1

(12)

(43) Date of publication:
30.11.2022 Bulletin 2022/48

(21) Application number: 20821384.3

(22) Date of filing: 30.11.2020
(51) International Patent Classification (IPC): 
C22C 5/02(2006.01)
C22C 1/03(2006.01)
A44C 27/00(2006.01)
 C22C 1/02(2006.01)
C22F 1/14(2006.01)
G04B 37/22(2006.01)
(52) Cooperative Patent Classification (CPC):
C22C 5/02; C22C 1/02; C22C 1/03; C22F 1/14; G04B 37/22; A44C 27/003
(86) International application number:
PCT/IB2020/061265
(87) International publication number:
WO 2021/148862 (29.07.2021 Gazette 2021/30)
(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: 24.01.2020 CH 842020
24.01.2020 IT 202000001432

(71) Applicant: Argor-Heraeus S.A.
6850 Mendrisio (CH)

(72) Inventors:
  • ROSSINI, Marta
    6815 Melide (CH)
  • ARNABOLDI, Sergio
    23867 Suello (IT)
  • NAUER, Marco
    6834 Morbio Inferiore (CH)

(74) Representative: PGA S.p.A., Milano, Succursale di Lugano 
Via Castagnola, 21c
6900 Lugano
6900 Lugano (CH)

   


(54) TARNISHING RESISTANT QUINARY GOLD ALLOY, WITH COLOR COMPATIBLE WITH THE 5N STANDARD