EP 3775305 B1 20230628 - TARNISHING RESISTANT COPPER GOLD ALLOY, IN PARTICULAR 9K, AND METHOD FOR PRODUCTION THEREOF
Title (en)
TARNISHING RESISTANT COPPER GOLD ALLOY, IN PARTICULAR 9K, AND METHOD FOR PRODUCTION THEREOF
Title (de)
ANLAUFBESTÄNDIGE KUPFER-GOLD-LEGIERUNG, INSBESONDERE 9K, UND VERFAHREN ZUR HERSTELLUNG DAVON
Title (fr)
ALLIAGE DE CUIVRE ET D'OR, EN PARTICULIER 9K, RÉSISTANT AU TERNISSEMENT, ET SON PROCÉDÉ DE PRODUCTION
Publication
Application
Priority
- CH 4642018 A 20180412
- IB 2019053023 W 20190412
Abstract (en)
[origin: WO2019198042A1] The invention refers to an alloy, in particular for jewellery, characterized in that it comprises: Gold in the amount comprised between 330 ‰ and 420 ‰ in weight; Copper in the amount comprised between 500 ‰ and 620 ‰ in weight; Palladium in the amount comprised between 5 ‰ and 35 ‰ in weight. The invention also refers to a method of production of the alloy itself, a method of production of an item for jewellery and an item of jewellery.
IPC 8 full level
C22C 9/00 (2006.01); A44C 27/00 (2006.01); C22F 1/08 (2006.01)
CPC (source: CH EP)
A44C 27/003 (2013.01 - CH EP); C22C 1/02 (2013.01 - CH); C22C 9/00 (2013.01 - CH EP); G04B 37/221 (2024.01 - CH); C22F 1/08 (2013.01 - EP)
Designated contracting state (EPC)
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
DOCDB simple family (publication)
WO 2019198042 A1 20191017; CH 714880 A1 20191015; CH 714880 B1 20211230; EP 3775305 A1 20210217; EP 3775305 B1 20230628
DOCDB simple family (application)
IB 2019053023 W 20190412; CH 4642018 A 20180412; EP 19726481 A 20190412