WO2005030416A1 - 合金コロイド粒子、合金コロイド溶液とその製造方法および合金コロイド粒子を定着させた担持体 - Google Patents
合金コロイド粒子、合金コロイド溶液とその製造方法および合金コロイド粒子を定着させた担持体 Download PDFInfo
- Publication number
- WO2005030416A1 WO2005030416A1 PCT/JP2004/014219 JP2004014219W WO2005030416A1 WO 2005030416 A1 WO2005030416 A1 WO 2005030416A1 JP 2004014219 W JP2004014219 W JP 2004014219W WO 2005030416 A1 WO2005030416 A1 WO 2005030416A1
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- WO
- WIPO (PCT)
- Prior art keywords
- alloy
- solution
- particles
- metal
- alloy colloidal
- Prior art date
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J13/00—Colloid chemistry, e.g. the production of colloidal materials or their solutions, not otherwise provided for; Making microcapsules or microballoons
- B01J13/0004—Preparation of sols
- B01J13/0043—Preparation of sols containing elemental metal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/20—Catalysts, in general, characterised by their form or physical properties characterised by their non-solid state
- B01J35/23—Catalysts, in general, characterised by their form or physical properties characterised by their non-solid state in a colloidal state
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/40—Catalysts, in general, characterised by their form or physical properties characterised by dimensions, e.g. grain size
- B01J35/45—Nanoparticles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/05—Metallic powder characterised by the size or surface area of the particles
- B22F1/054—Nanosized particles
- B22F1/0545—Dispersions or suspensions of nanosized particles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/16—Making metallic powder or suspensions thereof using chemical processes
- B22F9/18—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds
- B22F9/24—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from liquid metal compounds, e.g. solutions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/86—Inert electrodes with catalytic activity, e.g. for fuel cells
- H01M4/90—Selection of catalytic material
- H01M4/92—Metals of platinum group
- H01M4/921—Alloys or mixtures with metallic elements
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Definitions
- the present invention relates to alloy colloid particles capable of exhibiting a catalytic function and the like, an alloy colloid solution in which the particles are dispersed in a solution, and a method for producing the same. Furthermore, the present invention relates to a carrier in which the alloy colloid particles are fixed on various substrates.
- Metal particles such as platinum function as a catalyst and platinum is used as metal particles of an alloy with another metal such as ruthenium, so that it is resistant to poisoning by CO, which is a problem with platinum alone.
- metal particles are usually made of fiber, woven cloth, non-woven cloth, film, or the like in order to increase the contact area with the reactants or to make the catalyst easier to handle.
- Metal particles are fixed on the surface of a substrate such as powder. There are various means for fixing metal particles on the surface of the substrate, but the method of applying a colloidal solution containing metal particles to the substrate is the simplest and most uniform method for fixing.
- a method for producing a colloid solution containing metal particles such as an alloy two or more metals are melted at a high temperature or alloyed by a sputtering method or the like, and the alloy is crushed by a crusher such as a colloid mill.
- a method of dispersing the alloy particles thus obtained in a solvent is generally used.
- the average particle size of the obtained alloy particles is large, so that when a porous material is used for the base, the alloy particles cannot enter the pores of the base and cannot be fixed to the base well. There is. Also, since the width of the particle size distribution of the alloy particles is wide, it is difficult to uniformly fix the alloy particles on the surface of the substrate.
- Patent Document 1 discloses a method of preparing an alloy colloid solution other than the dispersion method! RU
- An alloy colloid solution is prepared by simultaneously adding two or more metal salts dissolved in water to an aqueous solution in which a reducing agent such as an organic acid is dissolved. According to this, the degree of alloying of the alloy colloid particles can be increased, and the alloy colloid can be increased. Particles can be miniaturized (eg 2-3 nm).
- Patent Document 1 Japanese Patent Application Laid-Open No. 2001-224969
- the present invention provides an alloy colloid particle that is expected to exhibit excellent catalytic activity efficiently when used as a catalyst, an alloy colloid solution in which the alloy colloid particle is dispersed, and a method for producing the same.
- the purpose is to do.
- Another object of the present invention is to provide a carrier in which the function as a catalyst is more efficiently exhibited by fixing the colloidal alloy particles to a substrate.
- the alloy colloid particles of the present invention are characterized in that an alloy containing one or more kinds of metals different from the metal fine particles is formed on the surfaces of the metal fine particles.
- the solution is characterized in that the alloy colloid particles are dispersed in the solution.
- a metal salt is added to a solution containing no oxygen, the mixture is reduced for a certain period of time, and then at least one other metal salt is added and further reduced. It is characterized by the following.
- the carrier of the present invention is characterized in that the alloy colloid particles are fixed on a substrate.
- the alloy colloid particles of the present invention have a structure in which an alloy containing one or more metals different from the metal fine particles is precipitated on the surfaces of the metal fine particles.
- the alloy precipitates in the form of particles on the surface of metal fine particles, or precipitates so as to cover the metal surface.
- the catalytic activity of the alloy colloid particles of the present invention which will be described later in detail, is superior to the conventional alloy colloid particles.
- the alloy colloid solution in which the alloy colloid particles are dispersed in a solution is prepared by adding a metal salt to a solution containing no oxygen, reducing the metal salt for a certain period of time, and then adding one or more other metal salts. Then, it can be produced from the reduced product.
- the structure of the metal colloid particles can be changed by adjusting the time from the addition of the first metal salt to the addition of the next metal salt. By leaving an interval of about 2 minutes or more, it is possible to obtain alloy colloid particles having a structure in which another metal is precipitated on metal fine particles.
- the following metal salt is preferably added after 10 minutes or more, more preferably 60 minutes or more. Since there is no significant change in the metal fine particles serving as nuclei even after a long time interval, the time is preferably set to 300 minutes or less, more preferably 240 minutes or less.
- the metal salt is not particularly limited as long as it is appropriately selected depending on the components of the alloy colloid particles to be obtained, and is sufficiently dissolved in a solution and reduced by a reducing agent or the like.
- both the first metal salt and the second metal salt are at least one of platinum (Pt), ruthenium (Ru), gold (Au) and palladium (Pd). .
- the solution to which the metal salt is added is not particularly limited as long as it can dissolve the metal salt or a reducing agent described later, and examples thereof include water, alcohols, ketones, and ethers. Two or more of these may be used in combination.
- the alcohols include methanol, ethanol, 1-propanol and 2-propanol.
- ketones include methyl formate, methyl acetate, and ethyl acetate.
- ethers include methylethyl ether and getyl ether. From the viewpoint of sufficiently dissolving the metal salt, water or alcohol is preferred.
- a reducing agent to the solution to which the metal salt has been added.
- the reducing agent may be added before or after the addition of the metal salt, all at once or divided into two or more portions. It may be added.
- the reducing agent is not particularly limited as long as it is soluble in the solution.
- Examples include alcohols, citrates, carboxylic acids, ketones, ethers, aldehydes and esters. Further, two or more of these may be used in combination.
- alcohols include methanol, ethanol, 1-propanol, 2-propanol, ethylene glycol and glycerin.
- citrates include citrates such as citrate, sodium citrate, potassium citrate or ammonium citrate.
- carboxylic acids include formic acid, acetic acid, fumaric acid, malic acid, succinic acid, aspartic acid, and carboxylic acid salts thereof.
- ketones include acetone and methyl ethyl ketone.
- ethers include getyl ether.
- aldehydes include formalin and acetoaldehyde.
- esters include methyl formate, methyl acetate and ethyl acetate.
- the alloy colloid particles can be supported on various substrates such as fibers, woven fabrics, nonwoven fabrics, films and powders by a known means such as a dip method or a spray method.
- a support of the alloy colloid particles can be easily obtained regardless of the shape of the substrate.
- the type of the substrate is not particularly limited as long as the colloid particles can be fixed, but a porous substrate is preferable.
- Examples include carbons, inorganic ceramics or organic polymers. Further, two or more of these may be used in combination.
- the carbons include activated carbon, charcoal, and carbon fiber.
- the inorganic ceramics include alumina, titania, magnesia, silica and zeolite.
- organic polymer examples include polyethylene, polypropylene, polystyrene, polyimide, polysnolephone, polysilicone, naphion and polycellulose.
- those supported on carbons are suitable for catalysts for fuel cells, and those supported on nonwoven fabrics are suitable for use as biomarkers.
- FIG. 1 shows a TEM (transmission electron microscope) photograph of the alloy colloid particles in the alloy colloid solution thus obtained.
- the alloy colloidal particles had a structure in which a platinum-ruthenium alloy was precipitated on the surface of platinum fine particles, and the alloy also precipitated in the form of particles.
- the particle size of the alloy colloid particles was about 3-5 nm.
- FIG. 2 shows a TEM (transmission electron microscope) photograph of the alloy colloid particles in the alloy colloid solution thus obtained.
- the alloy colloid particles had a structure in which a platinum-gold alloy was precipitated on the surface of gold fine particles, and the alloy was precipitated as if the gold fine particles were covered.
- the particle size of the alloy colloid particles was about 10 nm.
- Example 1 the order of addition of the salted platinum solution and the ruthenium chloride solution was changed.
- a platinum-ruthenium alloy colloid solution was obtained in the same manner as described above.
- the alloy colloid particles thus obtained have a structure in which a platinum-ruthenium alloy is precipitated on the surface of ruthenium fine particles.
- a platinum-ruthenium-based alloy colloid solution was obtained in the same manner as in Example 1 except that a salted platinum acid solution and a ruthenium chloride solution were added at the same time and a reduction reaction was performed for 60 minutes.
- the alloy colloid particles obtained in this manner are the same as the colloid particles of a platinum-lutetium alloy as in Patent Document 1.
- the alloy colloid solution 100 / zee was added to a hydrogen peroxide solution at 50 ° C and 10Occ, and the alloy colloid solution was added.
- the amount (mol) of oxygen generated between 15 seconds and 60 seconds after the addition was measured, and the amount of oxygen generated per unit time (min) and unit platinum amount (mg) was determined.
- the amount of oxygen generated per unit time per unit amount of platinum was 0.78 (mol-O Zmg—PtZmin) in Example 3 and 0 in Comparative Example 1.
- Example 3 has a higher decomposition activity of hydrogen peroxide.
- alloy colloid particles and alloy colloid solutions having excellent activity as a catalyst can be obtained by a relatively simple method.
- the structure of the alloy colloid particles can be controlled by devising a procedure for introducing a metal salt as a raw material.
- the alloy colloid particles have a very small particle size (1 to 20 nm) and a small dispersion, and the alloy colloid particles in the solution are uniformly dispersed, using this alloy colloid solution, It can be easily carried on a substrate, and can be carried on any shape of substrate.
- the base material it can be used in various fields such as fuel cell catalysts and biomarkers.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Nanotechnology (AREA)
- Materials Engineering (AREA)
- Dispersion Chemistry (AREA)
- Inorganic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Composite Materials (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Catalysts (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
- Colloid Chemistry (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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JP2005514244A JP4815215B2 (ja) | 2003-09-29 | 2004-09-29 | 合金コロイド粒子、合金コロイド溶液とその製造方法および合金コロイド粒子を定着させた担持体 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2003-336898 | 2003-09-29 | ||
JP2003336898 | 2003-09-29 |
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WO2005030416A1 true WO2005030416A1 (ja) | 2005-04-07 |
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PCT/JP2004/014219 WO2005030416A1 (ja) | 2003-09-29 | 2004-09-29 | 合金コロイド粒子、合金コロイド溶液とその製造方法および合金コロイド粒子を定着させた担持体 |
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JP (1) | JP4815215B2 (ja) |
WO (1) | WO2005030416A1 (ja) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007029607A1 (ja) | 2005-09-08 | 2007-03-15 | Nippon Sheet Glass Company, Limited | 貴金属微粒子およびその製造方法 |
JP2007265887A (ja) * | 2006-03-29 | 2007-10-11 | Nippon Steel Corp | 固体高分子型燃料電池用アノード触媒 |
JP2010077526A (ja) * | 2008-09-25 | 2010-04-08 | Samsung Electro-Mechanics Co Ltd | 金属シードを用いた金属ナノ粒子の製造方法及び金属シードを含む金属ナノ粒子 |
JP2010185135A (ja) * | 2009-01-14 | 2010-08-26 | Kyushu Univ | コアシェル型金属ナノ粒子の製造方法 |
JP2011042863A (ja) * | 2009-08-19 | 2011-03-03 | Samsung Electro-Mechanics Co Ltd | 金属シードを用いた金属ナノ粒子の製造方法及び金属シードを含む金属ナノ粒子 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6417803A (en) * | 1987-07-14 | 1989-01-20 | Agency Ind Science Techn | Method for coating metal fine powder with other metal |
JP2002275511A (ja) * | 2001-03-15 | 2002-09-25 | Murata Mfg Co Ltd | 金属粉末の製造方法、金属粉末、導電性ペーストならびに積層セラミック電子部品 |
JP2002541320A (ja) * | 1999-04-02 | 2002-12-03 | サントル・ナショナル・ドゥ・ラ・ルシェルシュ・シャンティフィク | 粒子をコーティングするための方法 |
JP2003055703A (ja) * | 2001-08-16 | 2003-02-26 | Korea Advanced Inst Of Sci Technol | 金属間の置換反応を用いたコア−シェル構造および混合された合金構造の金属ナノ粒子の製造方法とその応用 |
-
2004
- 2004-09-29 WO PCT/JP2004/014219 patent/WO2005030416A1/ja active Application Filing
- 2004-09-29 JP JP2005514244A patent/JP4815215B2/ja not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6417803A (en) * | 1987-07-14 | 1989-01-20 | Agency Ind Science Techn | Method for coating metal fine powder with other metal |
JP2002541320A (ja) * | 1999-04-02 | 2002-12-03 | サントル・ナショナル・ドゥ・ラ・ルシェルシュ・シャンティフィク | 粒子をコーティングするための方法 |
JP2002275511A (ja) * | 2001-03-15 | 2002-09-25 | Murata Mfg Co Ltd | 金属粉末の製造方法、金属粉末、導電性ペーストならびに積層セラミック電子部品 |
JP2003055703A (ja) * | 2001-08-16 | 2003-02-26 | Korea Advanced Inst Of Sci Technol | 金属間の置換反応を用いたコア−シェル構造および混合された合金構造の金属ナノ粒子の製造方法とその応用 |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007029607A1 (ja) | 2005-09-08 | 2007-03-15 | Nippon Sheet Glass Company, Limited | 貴金属微粒子およびその製造方法 |
US7754644B2 (en) | 2005-09-08 | 2010-07-13 | Nippon Sheet Glass Company, Limited | Noble metal particle and process of producing the same |
JP2007265887A (ja) * | 2006-03-29 | 2007-10-11 | Nippon Steel Corp | 固体高分子型燃料電池用アノード触媒 |
JP2010077526A (ja) * | 2008-09-25 | 2010-04-08 | Samsung Electro-Mechanics Co Ltd | 金属シードを用いた金属ナノ粒子の製造方法及び金属シードを含む金属ナノ粒子 |
JP2010185135A (ja) * | 2009-01-14 | 2010-08-26 | Kyushu Univ | コアシェル型金属ナノ粒子の製造方法 |
JP2011042863A (ja) * | 2009-08-19 | 2011-03-03 | Samsung Electro-Mechanics Co Ltd | 金属シードを用いた金属ナノ粒子の製造方法及び金属シードを含む金属ナノ粒子 |
Also Published As
Publication number | Publication date |
---|---|
JP4815215B2 (ja) | 2011-11-16 |
JPWO2005030416A1 (ja) | 2007-11-15 |
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