CA2179374A1 - Gold alloy - Google Patents
Gold alloyInfo
- Publication number
- CA2179374A1 CA2179374A1 CA002179374A CA2179374A CA2179374A1 CA 2179374 A1 CA2179374 A1 CA 2179374A1 CA 002179374 A CA002179374 A CA 002179374A CA 2179374 A CA2179374 A CA 2179374A CA 2179374 A1 CA2179374 A1 CA 2179374A1
- Authority
- CA
- Canada
- Prior art keywords
- alloy
- gold
- karats
- copper
- silver
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 229910001020 Au alloy Inorganic materials 0.000 title claims description 8
- 239000003353 gold alloy Substances 0.000 title description 5
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 37
- 239000000956 alloy Substances 0.000 claims abstract description 37
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims abstract description 22
- 229910052737 gold Inorganic materials 0.000 claims abstract description 22
- 239000010931 gold Substances 0.000 claims abstract description 22
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 14
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910052802 copper Inorganic materials 0.000 claims abstract description 12
- 239000010949 copper Substances 0.000 claims abstract description 12
- 239000011701 zinc Substances 0.000 claims abstract description 11
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims abstract description 10
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910052709 silver Inorganic materials 0.000 claims abstract description 10
- 239000004332 silver Substances 0.000 claims abstract description 10
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 10
- 238000004519 manufacturing process Methods 0.000 claims abstract description 6
- 229910002059 quaternary alloy Inorganic materials 0.000 claims abstract 3
- 229910002058 ternary alloy Inorganic materials 0.000 claims abstract 2
- 239000010936 titanium Substances 0.000 claims description 11
- 229910052719 titanium Inorganic materials 0.000 claims description 11
- 229910052738 indium Inorganic materials 0.000 claims description 5
- 229910052741 iridium Inorganic materials 0.000 claims description 5
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 claims description 4
- 229910052796 boron Inorganic materials 0.000 claims description 4
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 claims description 4
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 229910052707 ruthenium Inorganic materials 0.000 claims description 4
- 229910052710 silicon Inorganic materials 0.000 claims description 4
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 230000032683 aging Effects 0.000 abstract description 5
- 238000007669 thermal treatment Methods 0.000 abstract description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 8
- 229910017052 cobalt Inorganic materials 0.000 description 4
- 239000010941 cobalt Substances 0.000 description 4
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229910052759 nickel Inorganic materials 0.000 description 4
- 229910017944 Ag—Cu Inorganic materials 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 238000011282 treatment Methods 0.000 description 2
- NSMXQKNUPPXBRG-SECBINFHSA-N (R)-lisofylline Chemical compound O=C1N(CCCC[C@H](O)C)C(=O)N(C)C2=C1N(C)C=N2 NSMXQKNUPPXBRG-SECBINFHSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 206010020751 Hypersensitivity Diseases 0.000 description 1
- 241000102542 Kara Species 0.000 description 1
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000003570 air Substances 0.000 description 1
- 208000026935 allergic disease Diseases 0.000 description 1
- 230000007815 allergy Effects 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- -1 cobale Chemical compound 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 230000007928 solubilization Effects 0.000 description 1
- 238000005063 solubilization Methods 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 239000010938 white gold Substances 0.000 description 1
- 229910000832 white gold Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C5/00—Alloys based on noble metals
- C22C5/02—Alloys based on gold
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Adornments (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Catalysts (AREA)
Abstract
The alloy is based on gold and is suitable for use in the jewelry field for production of jewelry articles, coins and gold rods, with a titer variable between 8-22 karats and has a variable percentage of other components among which silver, copper, zinc in a ternary alloy, quaternary alloy and others. The alloy contains the titanium element. A satisfactory ratio is achieved between the aging time and the hardness in the thermal treatment carried out during the aging process.
Description
FIELD OF THE lNV~NllON
The present invention relate~ to alloys made of gold useful in the 3ewelry field for the production of jewelry articles, coins and rods made of gold with a titer which varies be~ween 8 karats and 22 karats with different percentages of other components among which are silver, copper and zinc and characterized by the presence of titanium which i~ the object of the presen~ invention.
BACKGROUND OF T~E ~NV~:NlION
It is well known ehat pure gold is extremely soft and th~t in the production of jewelry articles it is necessary to use a material which has particular properties of hardness, re~istance to wear and at ehe same time Qhould retain a warm and brilliant color.
The hardness of the alloy is due to phenomena of precipitation in the ~olid phase as well as phenomena of the disorder-order transition which occur below certain temperatures and particular atomic ratios between the elements of the alloy. I~ is at thi~
point that titanium is inserted into the composition and titanium, due to the fact thst it participates to the above mentioned phenomena of precipitation, imparts to the alloy novel properties.
Alloys of gold in general are made from the ternary system Au-Ag-Cu and in commerce they are available with different titer~ between 8 and 24 karats. Intermediate titers in commerce are 9, 10, 12, 14, 18, 20, 21 and 22 karaes. Up to very recent times the study of gold, a metal used for centuries for ornamental `~ 21 79374 purposes, above all because of the particular color and resi~tance to spotting, has been limited to alloys which are easily workable and with a plea~ant color. In YieW of the incre~e in the price o~ gold which at certain times has even been above $800 per ounce, i~ is evident that it has become necessary to use lighter jewelry but equally resistane.
In addition, for articles more showy, particularly bracelets (hollow), earrings made with a circle and ~inally the production of very thin chains similar for in~tance to the product~
listed in the Italian p~tent application VI9SA000085 of the same ~pplicsnt, there are required lighter and more re~istant products not only for economical but also aesthetic reasons. This requirement is respon~ible for the fact that other me~als in pure state have been added to the three elements listed abo~e for the purpose of preparing jewelry alloys.
The metal which mo~tly is being used tO form the common quaternly alloy is zinc which is added in sm~ll quantities, less than 0.5% as a deoxidizing material or in greater amounts for instance up to 10% or even more in order to modify the color, ~he workability and the mechanical properties of the alloy. The combination, gold, silver, copper and zinc, constitute e~sentially all the gold alloys commonly used for jewelry ar~icles. These alloys may be different one from the other due to the addition to the four basic elements sm~ll amounts of other metals ~uch as nickel, cobale, iron, silicon, boron, ruthenium, iridium, indium or others. sy ~ay of example, patents which describe what has been summarized hereinabove and which show the variety of components being used to form a gold alloy are:
- USP No. 2,141,15~ in the name of Peterson, which contains 33Z-84% of gold, 10%-67% of copper, 2Z-10% of zinc, 2%-10% of ~ilYer and 0.1%-5~ o~ cobalt. In this alloy the cobalt is being used to obeain rever~ible hardening.
- USP No. 2,229,463 in the name of Leach, which contains 35%-752 of gold, 5%-25% of fiil~er, 12~-35% copper, 0.1~-12% zinc, and 1%-5 of iron. In this alloy the iron is used eo obtain both the reversible as well as irreversible hardening.
- USP No. 2,24~,100 in t~e name of ~oebich, which contains 33%-66% of gold, 1%-30% of sîlver, 10%-55% of copper, 0.5%-15% of zinc and 0.1%-5% of iron.
- USP No. 3,981,723 describes an alloy of white gold which contains palladium, silver, indium and 0.005% of iridium or ruthenium.
More recent patent~ describe alloys such as ~SP No. 5,180,551 in the name of Leach and Garner and USP No. 5,173,132 in the name of Solomon. In these patents different combinations of cobalt and ~ickel are used for the purpose of impro~ing the structure of the grain, optimizing ~he color and increasing the mechanical resistence .
It is clear from the above list of patents with respect to the state of the art in the field of jewelry products, the titanium element does not ~ppear because the work of alloy~ which coneain this element requires particular precaution~ due to great activity `- 21 79374 at high temperature ~ith air, oxygen, nitrogen, carbon which are commonly present in forming the protec~ive atmo~phere during the ~reatment-~ of solubilization, aging, cold working, fusion or otbers.
The only alloy of gold known at present which contains titsnium is the alloy knowD as "gold 990". This alloy has a high karat and i~ the result of btudy carried out in the 1970 period and the purpose was to sol~e two ~ypes of problems, hardening an alloy with a very low percentage of alloying elements and at the same time produce an ~lloy which is aesthetically satisfactory, for ins~ance with respect eo color. The result has been that an alloy with karats of 23.76 in gold and 1% by weight of titanium has been made. This alloy has offered a resistance to wear equal to an alloy of 18 karatg and hafi been claimed particularly in USP
1,023,334 and Dutch Patent ~o. P35 02 914.5.
The titanium is present in this alloy in the form of titanium nitride in the galvanic treatments of superficial hardening for the purpose of increasing the resistance to wear and to abrasion of jewelry articles having high karats (see A.R.
Zielonka Gold Technology No. 14, November 1994).
SUMMARY OF THE INVENTION
The object of the present invention is to provide a gold alloy h~ing between 8 and 22 karats with the ternary system Au-Ag-Cu, which msy include other elementb such 8S Zn, ~u, Ir, B, Si, In or others and which contain the titanium element.
In particular, titsnium sub~titute6 in practice two elements which ~p ~o the present time have been employed in the production of jewelry, that is nickel and cobalt. These two elements have the drawback that they are ferromagnetic and ~heir pre~ence in the alloy limits the sale of jewelry in the markets in which ~here are some restricting laws in this respect. Further the nickel, as it i~ well known, may cause serious types of allergy in the skin to such an extent that in several coun~ries such as Japan, England and Germany law~ have been made which prevent the commercialization of jewelry articles ~-hich contain nickel.
With an alloy containing abo~ 58.5% of gold, 5%-10$ of silver, 15%-25~ of copper, 10%-20~ of zinc and 0.1%-1% of titanium, one obtains a gold product suitable for the above described uses, of sufficient mechanical resistance and hardness (160 HV with the renewed baking and 280 HV with the agin~ treatm~nt and with a grain dimension of 8 AS~M). A~ the same time the alloy has a pleasan~
color si~ilar to the alloy having 18 karats which is the alloy most used - see Ta~le he~einbelow.
re~aked alloy allov 2~ter the aging treatment hardness 160 ~v 280 HV
grain dLmension 8 ASTM 8 ASTM
The present invention relate~ to alloys made of gold useful in the 3ewelry field for the production of jewelry articles, coins and rods made of gold with a titer which varies be~ween 8 karats and 22 karats with different percentages of other components among which are silver, copper and zinc and characterized by the presence of titanium which i~ the object of the presen~ invention.
BACKGROUND OF T~E ~NV~:NlION
It is well known ehat pure gold is extremely soft and th~t in the production of jewelry articles it is necessary to use a material which has particular properties of hardness, re~istance to wear and at ehe same time Qhould retain a warm and brilliant color.
The hardness of the alloy is due to phenomena of precipitation in the ~olid phase as well as phenomena of the disorder-order transition which occur below certain temperatures and particular atomic ratios between the elements of the alloy. I~ is at thi~
point that titanium is inserted into the composition and titanium, due to the fact thst it participates to the above mentioned phenomena of precipitation, imparts to the alloy novel properties.
Alloys of gold in general are made from the ternary system Au-Ag-Cu and in commerce they are available with different titer~ between 8 and 24 karats. Intermediate titers in commerce are 9, 10, 12, 14, 18, 20, 21 and 22 karaes. Up to very recent times the study of gold, a metal used for centuries for ornamental `~ 21 79374 purposes, above all because of the particular color and resi~tance to spotting, has been limited to alloys which are easily workable and with a plea~ant color. In YieW of the incre~e in the price o~ gold which at certain times has even been above $800 per ounce, i~ is evident that it has become necessary to use lighter jewelry but equally resistane.
In addition, for articles more showy, particularly bracelets (hollow), earrings made with a circle and ~inally the production of very thin chains similar for in~tance to the product~
listed in the Italian p~tent application VI9SA000085 of the same ~pplicsnt, there are required lighter and more re~istant products not only for economical but also aesthetic reasons. This requirement is respon~ible for the fact that other me~als in pure state have been added to the three elements listed abo~e for the purpose of preparing jewelry alloys.
The metal which mo~tly is being used tO form the common quaternly alloy is zinc which is added in sm~ll quantities, less than 0.5% as a deoxidizing material or in greater amounts for instance up to 10% or even more in order to modify the color, ~he workability and the mechanical properties of the alloy. The combination, gold, silver, copper and zinc, constitute e~sentially all the gold alloys commonly used for jewelry ar~icles. These alloys may be different one from the other due to the addition to the four basic elements sm~ll amounts of other metals ~uch as nickel, cobale, iron, silicon, boron, ruthenium, iridium, indium or others. sy ~ay of example, patents which describe what has been summarized hereinabove and which show the variety of components being used to form a gold alloy are:
- USP No. 2,141,15~ in the name of Peterson, which contains 33Z-84% of gold, 10%-67% of copper, 2Z-10% of zinc, 2%-10% of ~ilYer and 0.1%-5~ o~ cobalt. In this alloy the cobalt is being used to obeain rever~ible hardening.
- USP No. 2,229,463 in the name of Leach, which contains 35%-752 of gold, 5%-25% of fiil~er, 12~-35% copper, 0.1~-12% zinc, and 1%-5 of iron. In this alloy the iron is used eo obtain both the reversible as well as irreversible hardening.
- USP No. 2,24~,100 in t~e name of ~oebich, which contains 33%-66% of gold, 1%-30% of sîlver, 10%-55% of copper, 0.5%-15% of zinc and 0.1%-5% of iron.
- USP No. 3,981,723 describes an alloy of white gold which contains palladium, silver, indium and 0.005% of iridium or ruthenium.
More recent patent~ describe alloys such as ~SP No. 5,180,551 in the name of Leach and Garner and USP No. 5,173,132 in the name of Solomon. In these patents different combinations of cobalt and ~ickel are used for the purpose of impro~ing the structure of the grain, optimizing ~he color and increasing the mechanical resistence .
It is clear from the above list of patents with respect to the state of the art in the field of jewelry products, the titanium element does not ~ppear because the work of alloy~ which coneain this element requires particular precaution~ due to great activity `- 21 79374 at high temperature ~ith air, oxygen, nitrogen, carbon which are commonly present in forming the protec~ive atmo~phere during the ~reatment-~ of solubilization, aging, cold working, fusion or otbers.
The only alloy of gold known at present which contains titsnium is the alloy knowD as "gold 990". This alloy has a high karat and i~ the result of btudy carried out in the 1970 period and the purpose was to sol~e two ~ypes of problems, hardening an alloy with a very low percentage of alloying elements and at the same time produce an ~lloy which is aesthetically satisfactory, for ins~ance with respect eo color. The result has been that an alloy with karats of 23.76 in gold and 1% by weight of titanium has been made. This alloy has offered a resistance to wear equal to an alloy of 18 karatg and hafi been claimed particularly in USP
1,023,334 and Dutch Patent ~o. P35 02 914.5.
The titanium is present in this alloy in the form of titanium nitride in the galvanic treatments of superficial hardening for the purpose of increasing the resistance to wear and to abrasion of jewelry articles having high karats (see A.R.
Zielonka Gold Technology No. 14, November 1994).
SUMMARY OF THE INVENTION
The object of the present invention is to provide a gold alloy h~ing between 8 and 22 karats with the ternary system Au-Ag-Cu, which msy include other elementb such 8S Zn, ~u, Ir, B, Si, In or others and which contain the titanium element.
In particular, titsnium sub~titute6 in practice two elements which ~p ~o the present time have been employed in the production of jewelry, that is nickel and cobalt. These two elements have the drawback that they are ferromagnetic and ~heir pre~ence in the alloy limits the sale of jewelry in the markets in which ~here are some restricting laws in this respect. Further the nickel, as it i~ well known, may cause serious types of allergy in the skin to such an extent that in several coun~ries such as Japan, England and Germany law~ have been made which prevent the commercialization of jewelry articles ~-hich contain nickel.
With an alloy containing abo~ 58.5% of gold, 5%-10$ of silver, 15%-25~ of copper, 10%-20~ of zinc and 0.1%-1% of titanium, one obtains a gold product suitable for the above described uses, of sufficient mechanical resistance and hardness (160 HV with the renewed baking and 280 HV with the agin~ treatm~nt and with a grain dimension of 8 AS~M). A~ the same time the alloy has a pleasan~
color si~ilar to the alloy having 18 karats which is the alloy most used - see Ta~le he~einbelow.
re~aked alloy allov 2~ter the aging treatment hardness 160 ~v 280 HV
grain dLmension 8 ASTM 8 ASTM
The above mentioned properties are also clear ~ro~ the accompanying figures:
Fig. 1 which illustrates the r~tio which exists between the time and the hardness in the thermal treatment of aging.
The specific quantities of the indi~idual pure metals, expressed in percentage weight clearly vary as a function of the specific uses of the gold alloy.
The invention, therefore, consists of providing an alloy having the ternary gold, silver, copper composition and ~ieh titanium variable as well a~ alloys of a quaternary type and others.
Fig. 1 which illustrates the r~tio which exists between the time and the hardness in the thermal treatment of aging.
The specific quantities of the indi~idual pure metals, expressed in percentage weight clearly vary as a function of the specific uses of the gold alloy.
The invention, therefore, consists of providing an alloy having the ternary gold, silver, copper composition and ~ieh titanium variable as well a~ alloys of a quaternary type and others.
Claims (4)
1. An alloy of gold comprising at least the ternary composition of gold, silver and copper, having 8-22 karats in several percentage compositions by weight and suitable for the production of jewelry articles, coins and gold rods and which comprises also titanium.
2. The alloy according to claim 1, wherein the alloy is a quaternary alloy containing gold, silver, copper and zinc, having between 8 and 22 karats and additionally contains titanium.
3. The alloy according to claim 1, wherein the alloy is ternary alloy with gold, silver and copper, has 8-22 karats and additionally contains titanium and which comprises small quantities of other elements, said elements being silicon, boron, indium, iridium, ruthenium or others.
4. The alloy according to claim 2 which is a quaternary alloy containing gold, silver, copper and zinc and additionally titanium, said alloy having 8-22 karats and having small quantities of the elements silicon, boron, indium, ruthenium, iridium or others.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT95VI000105A IT1280528B1 (en) | 1995-06-27 | 1995-06-27 | GOLD-BASED ALLOYS |
| ITVI95A000105 | 1995-06-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2179374A1 true CA2179374A1 (en) | 1996-12-28 |
Family
ID=11425817
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002179374A Abandoned CA2179374A1 (en) | 1995-06-27 | 1996-06-18 | Gold alloy |
Country Status (7)
| Country | Link |
|---|---|
| JP (1) | JPH0913132A (en) |
| CA (1) | CA2179374A1 (en) |
| DE (1) | DE19625807A1 (en) |
| GB (1) | GB2302694B (en) |
| IL (1) | IL118622A (en) |
| IT (1) | IT1280528B1 (en) |
| TR (1) | TR199600540A3 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005045477A1 (en) * | 2005-09-22 | 2007-03-29 | Qvc Handel Gmbh | Gold alloy for manufacture of jewelry contains 75 to 91 per cent weight of the elements gold, silver, zinc and copper |
| RU2514898C1 (en) * | 2013-04-09 | 2014-05-10 | Федеральное Государственное Автономное Образовательное Учреждение Высшего Профессионального Образования "Сибирский Федеральный Университет" | Assay 585 gold-based alloy of red colour |
| RU2625204C1 (en) * | 2016-07-11 | 2017-07-12 | Юлия Алексеевна Щепочкина | Gold-based alloy |
| DE102020206620A1 (en) | 2020-05-27 | 2021-12-02 | Dr. Alex Wellendorff Gmbh & Co. Kg | Alloy, in particular noble metal alloy, semifinished product made from such an alloy, piece of jewelry with at least one such semifinished product, and method for producing such a semifinished product |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB878032A (en) * | 1959-12-11 | 1961-09-20 | B G Corp | Improvements in or relating to brazing compositions for metals and ceramics, and articles produced using such compositions |
| GB1149597A (en) * | 1967-05-24 | 1969-04-23 | Vnii Goznaka | Gold alloys and method of working them |
| US4775511A (en) * | 1986-07-08 | 1988-10-04 | William Kono | Method of sulfide tarnish inhibiting of silver-copper, silver-gold and silver-copper-gold alloys |
| JPH02225655A (en) * | 1989-02-28 | 1990-09-07 | Agency Of Ind Science & Technol | Gold alloy capable of coloring into bright black color and coloring method therefor |
-
1995
- 1995-06-27 IT IT95VI000105A patent/IT1280528B1/en active IP Right Grant
-
1996
- 1996-06-11 IL IL11862296A patent/IL118622A/en not_active IP Right Cessation
- 1996-06-12 JP JP8150751A patent/JPH0913132A/en active Pending
- 1996-06-13 GB GB9612394A patent/GB2302694B/en not_active Expired - Fee Related
- 1996-06-18 CA CA002179374A patent/CA2179374A1/en not_active Abandoned
- 1996-06-27 DE DE19625807A patent/DE19625807A1/en not_active Withdrawn
- 1996-06-27 TR TR96/00540A patent/TR199600540A3/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| GB9612394D0 (en) | 1996-08-14 |
| GB2302694B (en) | 1998-11-11 |
| ITVI950105A0 (en) | 1995-06-27 |
| IT1280528B1 (en) | 1998-01-22 |
| GB2302694A (en) | 1997-01-29 |
| TR199600540A2 (en) | 1998-01-21 |
| JPH0913132A (en) | 1997-01-14 |
| IL118622A (en) | 2000-08-13 |
| DE19625807A1 (en) | 1997-01-02 |
| TR199600540A3 (en) | 1998-01-21 |
| ITVI950105A1 (en) | 1996-12-27 |
| IL118622A0 (en) | 1996-10-16 |
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| Date | Code | Title | Description |
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