US2406172A - Platinum or allied metals, or their alloys, and articles made therefrom - Google Patents
Platinum or allied metals, or their alloys, and articles made therefrom Download PDFInfo
- Publication number
- US2406172A US2406172A US478552A US47855243A US2406172A US 2406172 A US2406172 A US 2406172A US 478552 A US478552 A US 478552A US 47855243 A US47855243 A US 47855243A US 2406172 A US2406172 A US 2406172A
- Authority
- US
- United States
- Prior art keywords
- platinum
- alloys
- metals
- articles made
- rhodium
- 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.)
- Expired - Lifetime
Links
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 title description 41
- 229910052751 metal Inorganic materials 0.000 title description 22
- 239000002184 metal Substances 0.000 title description 22
- 229910052697 platinum Inorganic materials 0.000 title description 19
- 150000002739 metals Chemical class 0.000 title description 15
- 229910045601 alloy Inorganic materials 0.000 title description 12
- 239000000956 alloy Substances 0.000 title description 12
- 239000000463 material Substances 0.000 description 13
- 239000010948 rhodium Substances 0.000 description 10
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 10
- 229910052703 rhodium Inorganic materials 0.000 description 9
- ZCUFMDLYAMJYST-UHFFFAOYSA-N thorium dioxide Chemical compound O=[Th]=O ZCUFMDLYAMJYST-UHFFFAOYSA-N 0.000 description 8
- 229910003452 thorium oxide Inorganic materials 0.000 description 7
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 7
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 6
- 239000004615 ingredient Substances 0.000 description 6
- 239000010937 tungsten Substances 0.000 description 6
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 229910052739 hydrogen Inorganic materials 0.000 description 5
- 239000001257 hydrogen Substances 0.000 description 5
- 229910052741 iridium Inorganic materials 0.000 description 5
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 description 5
- 229910052707 ruthenium Inorganic materials 0.000 description 5
- 229910052721 tungsten Inorganic materials 0.000 description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 239000003054 catalyst Substances 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 239000000470 constituent Substances 0.000 description 3
- 229910052763 palladium Inorganic materials 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 229910001260 Pt alloy Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- VGBPIHVLVSGJGR-UHFFFAOYSA-N thorium(4+);tetranitrate Chemical compound [Th+4].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O VGBPIHVLVSGJGR-UHFFFAOYSA-N 0.000 description 2
- ZSLUVFAKFWKJRC-IGMARMGPSA-N 232Th Chemical compound [232Th] ZSLUVFAKFWKJRC-IGMARMGPSA-N 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 150000001218 Thorium Chemical class 0.000 description 1
- 229910052776 Thorium Inorganic materials 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- QZPSXPBJTPJTSZ-UHFFFAOYSA-N aqua regia Chemical compound Cl.O[N+]([O-])=O QZPSXPBJTPJTSZ-UHFFFAOYSA-N 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 239000011872 intimate mixture Substances 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 229910003446 platinum oxide Inorganic materials 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- -1 rhodium ammonium chloride Chemical compound 0.000 description 1
- 229910003450 rhodium oxide Inorganic materials 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 229910001930 tungsten oxide Inorganic materials 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T13/00—Sparking plugs
- H01T13/20—Sparking plugs characterised by features of the electrodes or insulation
- H01T13/39—Selection of materials for electrodes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D3/00—Cutting work characterised by the nature of the cut made; Apparatus therefor
- B26D3/18—Cutting work characterised by the nature of the cut made; Apparatus therefor to obtain cubes or the like
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/0466—Alloys based on noble metals
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
- C22C32/001—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with only oxides
- C22C32/0015—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with only oxides with only single oxides as main non-metallic constituents
- C22C32/0021—Matrix based on noble metals, Cu or alloys thereof
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N10/00—Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects
- H10N10/80—Constructional details
- H10N10/85—Thermoelectric active materials
- H10N10/851—Thermoelectric active materials comprising inorganic compositions
- H10N10/854—Thermoelectric active materials comprising inorganic compositions comprising only metals
Definitions
- This invention relates to platinum, or any of the following allied metals in the platinum group, namely, rhodium, iridium, ruthenium, and palladium, and to alloys in which any of these metals forms the principal ingredient.
- the invention also relates to articles made from such metals or alloys and required to be able to withstand high temperatures and corrosive actions, such as sparking plug electrodes, thermocouples, electric furnace heating elements, and wire gauzes foruse as catalyst gauzes in chemical operations. to minimise the normal tendency of the initially fine-grained structure of such metals or their alloys to change into a coarse-grained structure when subjected to high temperatures with consequent deterioration of their mechanical properties.
- the invention consists of a material, or an article made therefrom, in the form of a compacted and sintered agglomerate of platinum or any of the allied metals above specified or an alloy thereof, and refractory oxide, the constituents being initially in a finely divided condition.
- I may use commercially pure platinum, but preferably I use an alloy containing for example, about rhodium, or about 4% tungsten, or up to 30% iridium, or up to 30% ruthenium, the balance being platinum.
- the required finely divided condition is obtained by any known and suitable process such as precipitation, or decomposition and reduction in hydrogen, and the metal in this condition is intimately mixed with any suitable and finely divided oxide, such as alumina, thoria,
- the refractory oxide, or compound adapted to produce it subsequently is mixed with a compound of the metal (or compounds of the metals) before the reduction or decomposition.
- Thequantity of oxide required is usually from about 0.1% to 1% of the weight of the metal, and preferably about 0.25%. The best amount for any particular purpose is readily ascertainable by experiment. If too little is used there will be insuflicient control of grain growth; if too much is used the resulting metal will be difficult to shape by swaging, rolling or drawing.
- the mixture is then compacted by pressure, sintered, and subsequently swaged, rolled, drawn, or otherwise
- the object of the invention is rhodium, and thorium oxide.
- thorium nitrate containing 0.5 gram of thorium oxide (ThOz).
- ThiOz thorium oxide
- the resultant paste is evaporated to dryness with constant stirring to ensure a uniform distribution of the constituents.
- the dried mass is then heated in a current of hydrogen at about 850 C. to decompose the rhodium and the thorium salts,.leaving an intimate mixture of platinum,
- the product is sieved, packed into a steel mould and compressed under a pressure of about tons per square inch in order to form a coherent mass.
- the compressed material is then heated at about 1400-1550 C.
- I employ 96 grams of platinum dissolved in aqua regia, a solution of ammonium tungstate containing 4 grams of tungsten, and another or the same solution containing thorium nitrate having 0.2% grams of thorium oxide.
- the tungsten and thorium solutions are added to the platinum solution, and after neutralising with ammonia, the mixture is evaporated to dryness.
- the resulting powder is heated at about 800 C. in air and then heated to about 1000 C. in hydrogen.
- the product consisting of finely divided platinum, tungsten and thorium oxide is formed into a bar by pressing in a steel mould at about 50 tons per square inch. The bar is then sintered in hydrogen for about two hoursat about 1450 C. and finally swaged, rolled or drawn to the required form and dimensions.
- Materials made in accordance with the invention are characterised by having a higher tensile strength and greater hardness than corresponding materials made in the usual way, and by a crystalline structure which is satisfactorily stable at high temperatures.
- the platinum, and platinum alloys produced in accordance with my invention are especially useful for use as sparking plug electrodes. They are also useful for thermo-couples, furnace heating elements, catalyst gauzes, and other articles required to resist high temperatures (of the order of 1000" C. or more), or corrosive actions under which metals produced in ordinary ways are liable to coarsening of the grain structure or other deterioration resulting in weakening such mechanical properties as strength or hardness.
- a material as claimed in claim 2 which contains platinum alloyed with about 10% of rhodium, and about 0.5% of thorium oxide.
- a material as claimed in claim 2 which contains platinum alloyed with about 4% of tungsten, and about 0.2% of thorium oxide.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Inorganic Chemistry (AREA)
- Powder Metallurgy (AREA)
- Catalysts (AREA)
- Spark Plugs (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1654/42A GB578956A (en) | 1942-02-07 | 1942-02-07 | Improvements relating to sparking plug electrodes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2406172A true US2406172A (en) | 1946-08-20 |
Family
ID=9725709
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US478552A Expired - Lifetime US2406172A (en) | 1942-02-07 | 1943-03-09 | Platinum or allied metals, or their alloys, and articles made therefrom |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US2406172A (xx) |
| BE (1) | BE466569A (xx) |
| CH (1) | CH266685A (xx) |
| DE (1) | DE838067C (xx) |
| FR (1) | FR941701A (xx) |
| GB (1) | GB578956A (xx) |
| IT (1) | IT460208A (xx) |
| LU (1) | LU28048A1 (xx) |
| NL (1) | NL69608C (xx) |
Cited By (59)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2467446A (en) * | 1944-11-08 | 1949-04-19 | Baker & Co Inc | Catalytic oxidation of ammonia to oxides of nitrogen |
| US2476222A (en) * | 1944-03-10 | 1949-07-12 | Int Nickel Co | Production of powdered metal mixtures for sintering |
| US2476208A (en) * | 1943-10-28 | 1949-07-12 | Int Nickel Co | Sintered precious metal product |
| US2506414A (en) * | 1947-12-05 | 1950-05-02 | Bell Telephone Labor Inc | Sealed wire contact device |
| US2537733A (en) * | 1950-05-01 | 1951-01-09 | Adolph Cohn | Variable resistor |
| US2545438A (en) * | 1949-01-12 | 1951-03-20 | Baker & Co Inc | Spark plug electrode |
| US2636819A (en) * | 1951-01-31 | 1953-04-28 | Baker & Co Inc | Grain stabilizing metals and alloys |
| US2641582A (en) * | 1950-10-03 | 1953-06-09 | Universal Oil Prod Co | Regeneration of a platinumcontaining catalyst |
| US2699518A (en) * | 1952-03-19 | 1955-01-11 | Cohn Eugene | Grid for electron tubes |
| US2708253A (en) * | 1950-11-18 | 1955-05-10 | Baker & Co Inc | Fuel igniters |
| US2708252A (en) * | 1950-11-18 | 1955-05-10 | Baker & Co Inc | Fuel igniters |
| US2737541A (en) * | 1951-02-17 | 1956-03-06 | Roger S Coolidge | Storage battery electrodes and method of making the same |
| US2752665A (en) * | 1950-04-21 | 1956-07-03 | Baker & Co Inc | Grain stabilized metals and alloys |
| DE959857C (de) * | 1954-06-16 | 1957-03-14 | Thyssen Huette Ag | Schutzrohr fuer Thermoelemente der Platingruppe |
| US2786925A (en) * | 1952-12-31 | 1957-03-26 | Sprague Electric Co | Metal film resistor |
| US2844868A (en) * | 1954-06-01 | 1958-07-29 | Sylvania Electric Prod | Method of joining refractory metals |
| US2856491A (en) * | 1952-09-27 | 1958-10-14 | North Electric Co | Electrical contact alloy of platinum group metal and zinc and method of making same |
| US2861114A (en) * | 1955-05-23 | 1958-11-18 | Nishimura Hideo | Thermocouple and elements thereof |
| US2866692A (en) * | 1954-06-28 | 1958-12-30 | Roehm & Haas Gmbh | Catalytic apparatus and method for protecting a metallic catalyst against injury |
| US2957037A (en) * | 1959-07-16 | 1960-10-18 | Battelle Development Corp | Thermocouple |
| US2978314A (en) * | 1956-03-05 | 1961-04-04 | Fairchild Camera Instr Co | Compositions for electrical resistance films |
| US3007990A (en) * | 1960-03-29 | 1961-11-07 | Gen Electric | Thermocouple |
| US3009779A (en) * | 1953-02-25 | 1961-11-21 | Basf Ag | Production of hydroxylamine |
| US3044867A (en) * | 1957-05-15 | 1962-07-17 | Messrs Aktiebolaget Svenska Me | Method for the production of metallicceramic materials |
| US3049577A (en) * | 1959-08-28 | 1962-08-14 | Engelhard Ind Inc | Composite material and thermocouple made therefrom |
| US3061756A (en) * | 1960-07-05 | 1962-10-30 | Monsanto Chemicals | Spark plug |
| US3070436A (en) * | 1959-03-17 | 1962-12-25 | Curtiss Wright Corp | Method of manufacture of homogeneous compositions |
| US3082277A (en) * | 1960-04-19 | 1963-03-19 | Westinghouse Electric Corp | Thermoelectric elements |
| US3099575A (en) * | 1959-10-20 | 1963-07-30 | Engelhard Ind Inc | Thermocouple |
| US3109716A (en) * | 1957-07-22 | 1963-11-05 | Owens Corning Fiberglass Corp | Lamellar metal structure |
| US3159460A (en) * | 1957-07-10 | 1964-12-01 | Engelhard Ind Inc | Composite material |
| US3166417A (en) * | 1962-05-07 | 1965-01-19 | Int Nickel Co | Platinum-group metal sheet |
| US3229139A (en) * | 1962-10-18 | 1966-01-11 | John E Watson | High temperature spark plug |
| US3305817A (en) * | 1964-04-02 | 1967-02-21 | Hitachi Ltd | Electric strain gauge having platinumpalladium-molybdenum alloy filament |
| US3305816A (en) * | 1964-02-08 | 1967-02-21 | Hitachi Ltd | Ternary alloy strain gauge |
| US3306857A (en) * | 1962-03-28 | 1967-02-28 | Du Pont | Solid solution of w-v sc and thermoelectric element consisting of same |
| US3326645A (en) * | 1965-09-22 | 1967-06-20 | Beckman Instruments Inc | Cermet resistance element and material |
| US3362799A (en) * | 1964-05-13 | 1968-01-09 | Int Nickel Co | Ductile ruthenium alloy and process for producing the same |
| US3423248A (en) * | 1963-10-08 | 1969-01-21 | Bbc Brown Boveri & Cie | Gas diffusion electrode for electrochemical fuel cells and method of making same |
| US3506494A (en) * | 1966-12-22 | 1970-04-14 | Engelhard Ind Inc | Process for producing electrical energy utilizing platinum-containing catalysts |
| US3622310A (en) * | 1968-01-20 | 1971-11-23 | Degussa | Process of preparing noble metal materials having improved high temperature strength properties |
| US3665756A (en) * | 1965-10-18 | 1972-05-30 | Microdot Inc | Strain gauge temperature compensation system |
| US4049513A (en) * | 1975-03-17 | 1977-09-20 | Erco Industries Limited | Treatment of cell anodes |
| US4186110A (en) * | 1978-07-03 | 1980-01-29 | United Technologies Corporation | Noble metal-refractory metal alloys as catalysts and method for making |
| US4301032A (en) * | 1980-05-21 | 1981-11-17 | The United States Of America As Represented By The Secretary Of The Interior | Thorium oxide-containing catalyst and method of preparing same |
| EP0350152A2 (en) * | 1988-07-06 | 1990-01-10 | Ngk Spark Plug Co., Ltd | An igniter plug particularly for use with very low temperature liquid fuel |
| US5275670A (en) * | 1993-07-06 | 1994-01-04 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | High temperature, oxidation resistant noble metal-Al alloy thermocouple |
| USRE34778E (en) * | 1981-04-30 | 1994-11-08 | Nippondenso Co., Ltd. | Spark plug and method of manufacturing the same |
| EP0982409A2 (de) * | 1998-08-27 | 2000-03-01 | C. HAFNER GmbH & Co. | Verfahren zum Herstellen eines Formkörpers aus Rhodium-Pulver sowie aus Rhodium-Pulver hergestellter Formkörper |
| US6663728B2 (en) | 2000-09-18 | 2003-12-16 | W.C. Heraeus Gmbh & Co. Kg | Gold-free platinum material dispersion-strengthened by small, finely dispersed particles of base metal oxide |
| US20090218647A1 (en) * | 2008-01-23 | 2009-09-03 | Ev Products, Inc. | Semiconductor Radiation Detector With Thin Film Platinum Alloyed Electrode |
| US8436520B2 (en) | 2010-07-29 | 2013-05-07 | Federal-Mogul Ignition Company | Electrode material for use with a spark plug |
| US8471451B2 (en) | 2011-01-05 | 2013-06-25 | Federal-Mogul Ignition Company | Ruthenium-based electrode material for a spark plug |
| US8575830B2 (en) | 2011-01-27 | 2013-11-05 | Federal-Mogul Ignition Company | Electrode material for a spark plug |
| US8760044B2 (en) | 2011-02-22 | 2014-06-24 | Federal-Mogul Ignition Company | Electrode material for a spark plug |
| US8766519B2 (en) | 2011-06-28 | 2014-07-01 | Federal-Mogul Ignition Company | Electrode material for a spark plug |
| US8890399B2 (en) | 2012-05-22 | 2014-11-18 | Federal-Mogul Ignition Company | Method of making ruthenium-based material for spark plug electrode |
| US8979606B2 (en) | 2012-06-26 | 2015-03-17 | Federal-Mogul Ignition Company | Method of manufacturing a ruthenium-based spark plug electrode material into a desired form and a ruthenium-based material for use in a spark plug |
| US10044172B2 (en) | 2012-04-27 | 2018-08-07 | Federal-Mogul Ignition Company | Electrode for spark plug comprising ruthenium-based material |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1139281B (de) * | 1954-07-14 | 1962-11-08 | Degussa | Verbundwerkstoff fuer elektrische Kontakte |
| DE1116418B (de) * | 1955-06-13 | 1961-11-02 | Siemens Ag | Schreibstift zum Erzeugen von Schreibspuren durch Einwirkung eines elektrischen Potentials auf metallisierte Aufzeichnungstraeger |
| FR2429264A1 (fr) * | 1978-06-20 | 1980-01-18 | Louyot Comptoir Lyon Alemand | Procede de fabrication d'un platinoide comportant une phase dispersee d'un oxyde refractaire |
| DE4417495C1 (de) * | 1994-05-19 | 1995-09-28 | Schott Glaswerke | Verfahren zur Herstellung von mit Y¶2¶0¶3¶ dispersionsverfestigten Reinst-Platin-Werkstoffen, Halbzeugen und Blechen |
| DE10005559A1 (de) * | 2000-02-09 | 2001-08-23 | Bosch Gmbh Robert | Metallegierung mit Ruthenium und Zündkerze mit dieser Legierung |
| EP3121297B1 (fr) | 2015-07-23 | 2020-12-16 | Cartier International AG | Procédé d'obtention d'un composant d'ornement en alliage de platine |
-
0
- DE DENDAT838067D patent/DE838067C/de not_active Expired
- LU LU28048D patent/LU28048A1/xx unknown
- IT IT460208D patent/IT460208A/it unknown
-
1942
- 1942-02-07 GB GB1654/42A patent/GB578956A/en not_active Expired
-
1943
- 1943-03-09 US US478552A patent/US2406172A/en not_active Expired - Lifetime
-
1946
- 1946-07-05 CH CH266685D patent/CH266685A/de unknown
- 1946-07-10 NL NL126447A patent/NL69608C/xx active
- 1946-07-11 BE BE466569D patent/BE466569A/xx unknown
- 1946-07-12 FR FR941701D patent/FR941701A/fr not_active Expired
Cited By (65)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2476208A (en) * | 1943-10-28 | 1949-07-12 | Int Nickel Co | Sintered precious metal product |
| US2476222A (en) * | 1944-03-10 | 1949-07-12 | Int Nickel Co | Production of powdered metal mixtures for sintering |
| US2467446A (en) * | 1944-11-08 | 1949-04-19 | Baker & Co Inc | Catalytic oxidation of ammonia to oxides of nitrogen |
| US2506414A (en) * | 1947-12-05 | 1950-05-02 | Bell Telephone Labor Inc | Sealed wire contact device |
| US2545438A (en) * | 1949-01-12 | 1951-03-20 | Baker & Co Inc | Spark plug electrode |
| US2752665A (en) * | 1950-04-21 | 1956-07-03 | Baker & Co Inc | Grain stabilized metals and alloys |
| US2537733A (en) * | 1950-05-01 | 1951-01-09 | Adolph Cohn | Variable resistor |
| US2641582A (en) * | 1950-10-03 | 1953-06-09 | Universal Oil Prod Co | Regeneration of a platinumcontaining catalyst |
| US2708253A (en) * | 1950-11-18 | 1955-05-10 | Baker & Co Inc | Fuel igniters |
| US2708252A (en) * | 1950-11-18 | 1955-05-10 | Baker & Co Inc | Fuel igniters |
| US2636819A (en) * | 1951-01-31 | 1953-04-28 | Baker & Co Inc | Grain stabilizing metals and alloys |
| US2737541A (en) * | 1951-02-17 | 1956-03-06 | Roger S Coolidge | Storage battery electrodes and method of making the same |
| US2699518A (en) * | 1952-03-19 | 1955-01-11 | Cohn Eugene | Grid for electron tubes |
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Also Published As
| Publication number | Publication date |
|---|---|
| NL69608C (xx) | 1952-03-15 |
| GB578956A (en) | 1946-07-18 |
| CH266685A (de) | 1950-02-15 |
| IT460208A (xx) | |
| FR941701A (fr) | 1949-01-19 |
| BE466569A (xx) | 1947-01-11 |
| DE838067C (de) | 1952-03-27 |
| LU28048A1 (xx) |
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