Patents Assigned to ARGOR-HERAEUS SA
  • Discoloration resistant gold alloy and method of production thereof
    Patent number: 11889904
    Abstract: A discoloration resistant Gold alloy for jewelry characterized in that it comprises in weight: Gold, in the amount comprised between 755‰ and 770‰, Copper, in the amount comprised between 165‰ and 183‰, Silver, in the amount comprised between 28‰ and 50‰, Palladium, in the amount comprised between 19‰ and 23‰ and Iron, in the amount comprised between 2‰ and 6‰. and characterized by the absence of Vanadium.
    Type: Grant
    Filed: March 14, 2019
    Date of Patent: February 6, 2024
    Assignee: Argor-Heraeus SA
    Inventors: Sergio Arnaboldi, Marta Rossini, Marco Nauer
  • Discoloration-resistant gold alloy
    Patent number: 10683570
    Abstract: Alloy for the manufacturing of jewels or clock components with minimum concentrations of gold of 75 wt %, of copper between 5% and 21%, of silver between 0% and 21%, of iron between 0.5% and 4% and vanadium between 0.1% and 2.0%, intended to increase the tarnishing-resistance of alloys with a minimum content of gold of 75 wt % under environments in which Sulphur- and chlorine-compounds are present.
    Type: Grant
    Filed: June 1, 2018
    Date of Patent: June 16, 2020
    Assignee: ARGOR-HERAEUS SA
    Inventors: Sergio Arnaboldi, Marco Nauer, Stefano Ghiringhelli
  • Discoloration-resistant gold alloy
    Patent number: 10030296
    Abstract: Alloy for the manufacturing of jewels or clock components with minimum concentrations of gold of 75 wt %, of copper between 5% and 21%, of silver between 0% and 21%, of iron between 0.5% and 4% and vanadium between 0.1% and 2.0%, intended to increase the tarnishing-resistance of alloys with a minimum content of gold of 75 wt % under environments in which sulphur- and chlorine-compounds are present.
    Type: Grant
    Filed: December 2, 2013
    Date of Patent: July 24, 2018
    Assignee: ARGOR-HERAEUS SA
    Inventors: Sergio Arnaboldi, Marco Nauer, Stefano Ghiringhelli
  • DISCOLORATION-RESISTANT GOLD ALLOY
    Publication number: 20150345001
    Abstract: Alloy for the manufacturing of jewels or clock components with minimum concentrations of gold of 75 wt %, of copper between 5% and 21%, of silver between 0% and 21%, of iron between 0.5% and 4% and vanadium between 0.1% and 2.0%, intended to increase the tarnishing-resistance of alloys with a minimum content of gold of 75 wt % under environments in which sulphur- and chlorine-compounds are present.
    Type: Application
    Filed: December 2, 2013
    Publication date: December 3, 2015
    Applicant: ARGOR-HERAEUS SA
    Inventors: Sergio ARNABOLDI, Marco NAUER, Stefano GHIRINGHELLI