Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B1/00—Layered products having a non-planar shape
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B15/00—Layered products comprising a layer of metal
  • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
  • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B15/00—Layered products comprising a layer of metal
  • B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B27/00—Layered products comprising a layer of synthetic resin
  • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
  • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B27/00—Layered products comprising a layer of synthetic resin
  • B32B27/28—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B27/00—Layered products comprising a layer of synthetic resin
  • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
  • B32B27/308—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising acrylic (co)polymers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B27/00—Layered products comprising a layer of synthetic resin
  • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
  • B32B7/04—Interconnection of layers
  • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
  • H01M10/00—Secondary cells; Manufacture thereof
  • H01M10/04—Construction or manufacture in general
  • H01M10/0436—Small-sized flat cells or batteries for portable equipment
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
  • H01M10/00—Secondary cells; Manufacture thereof
  • H01M10/05—Accumulators with non-aqueous electrolyte
  • H01M10/052—Li-accumulators
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
  • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
  • H01M50/10—Primary casings; Jackets or wrappings
  • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
  • H01M50/11—Primary casings; Jackets or wrappings characterised by their shape or physical structure having a chip structure, e.g. micro-sized batteries integrated on chips
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
  • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
  • H01M50/10—Primary casings; Jackets or wrappings
  • H01M50/116—Primary casings; Jackets or wrappings characterised by the material
  • H01M50/117—Inorganic material
  • H01M50/119—Metals
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
  • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
  • H01M50/10—Primary casings; Jackets or wrappings
  • H01M50/116—Primary casings; Jackets or wrappings characterised by the material
  • H01M50/121—Organic material
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
  • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
  • H01M50/10—Primary casings; Jackets or wrappings
  • H01M50/116—Primary casings; Jackets or wrappings characterised by the material
  • H01M50/124—Primary casings; Jackets or wrappings characterised by the material having a layered structure
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
  • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
  • H01M50/10—Primary casings; Jackets or wrappings
  • H01M50/183—Sealing members
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2307/00—Properties of the layers or laminate
  • B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
  • B32B2307/206—Insulating
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2307/00—Properties of the layers or laminate
  • B32B2307/30—Properties of the layers or laminate having particular thermal properties
  • B32B2307/306—Resistant to heat
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2307/00—Properties of the layers or laminate
  • B32B2307/30—Properties of the layers or laminate having particular thermal properties
  • B32B2307/308—Heat stability
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2307/00—Properties of the layers or laminate
  • B32B2307/70—Other properties
  • B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2307/00—Properties of the layers or laminate
  • B32B2307/70—Other properties
  • B32B2307/724—Permeability to gases, adsorption
  • B32B2307/7242—Non-permeable
  • B32B2307/7246—Water vapor barrier
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2307/00—Properties of the layers or laminate
  • B32B2307/70—Other properties
  • B32B2307/726—Permeability to liquids, absorption
  • B32B2307/7265—Non-permeable
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2425/00—Cards, e.g. identity cards, credit cards
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B2457/00—Electrical equipment
  • B32B2457/10—Batteries
• • 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
  • Y02E60/10—Energy storage using batteries

Definitions

• the invention relates to a galvanic element with a metallic foil housing enclosing at least one positive and at least one negative electrode, an electronic chip card having such a galvanic element and a multilayer composite foil and their use as a sealing material for sealing the housing of galvanic elements.
• Lithium-ion cells in particular lithium-polymer cells (primary and secondary), can be produced as very thin, flexible flat cells and are thus very well suited as energy storage for chip cards, in particular for electronic chip cards such. As so-called “Active Smart Cards.” In such electronic smart cards energy storage for powering an IC chip or other components such as integrated miniature sensors or transponders are needed.
• EVA Ethylene vinyl acetate
• the object of the present invention was to find an alternative film material to EVA which, like EVA, has high heat resistance and good aging resistance, but has improved properties with respect to its adhesion properties to metals, in particular to copper.
• the new sealing material should provide galvanic elements with improved sealing properties, which are particularly suitable for use in electronic chip cards.
• a galvanic element according to the invention has a preferably multi-part, metallic foil housing which encloses at least one positive and at least one negative electrode.
• a galvanic element according to the invention preferably has exactly one positive and exactly one negative electrode.
• the film housing according to the invention is characterized in that it is sealed by means of a plastic film, which consists at least partially of a polymer having acid groups and / or acid anhydride groups and / or groups derived therefrom.
• the plastic film isolates the parts of the film housing against each other. At the same time, it acts as an electrical insulator and as a sealant which prevents the penetration of moisture into the interior of the film housing or into the interior of the cell according to the invention. It forms a sealant layer.
• the metallic film housing itself preferably performs not only its functions as a bare housing but also the functions of a current collector.
• the foil housing consists of two half-parts, one of which is in preferably direct contact with the at least one positive and the other in preferably direct contact with the at least one negative electrode.
• the half-parts then form the poles of the galvanic element according to the invention, on which the current can be taken off.
• the plastic film is arranged as a circumferential strip between the two half-parts.
• plastic films with a proportion of an acid group and / or acid anhydride groups and / or polymers derived therefrom have excellent adhesion properties to metals, in particular to copper, and at the same time are stable under the electrochemical loads occurring in a galvanic element. Also disruptive effects of the reactive acid groups and / or acid anhydride groups and / or groups derived therefrom of the plastic film used according to the invention on the electrochemical processes could not have been ruled out a priori, but could not be observed.
• the films used in accordance with the present invention provided a remarkably good barrier to moisture ingress.
• the plastic film is preferably a multilayer composite film, wherein at least one layer of the composite film of the Acid groups and / or acid anhydride groups and / or polymer derived therefrom groups exists.
• the polymer having acid groups and / or acid anhydride groups and / or groups derived therefrom is, in particular, an acrylic acid and / or methacrylic acid-based polymer.
• Polymers which have been obtained by copolymerization of a non-polar with a polar monomer have proved to be particularly suitable. Examples include ethylene-methacrylic acid copolymers (short EMAA, eg Surlyn® from DuPont) or ethylene-acrylic acid copolymers (EAA for short).
• the proportion of polar monomers in these polymers is preferably from 1% to 15%, preferably from 5% to 10%.
• the composite film has at least one layer of a preferably unmodified, in particular pure and nonpolar polyolefin.
• a preferably unmodified, in particular pure and nonpolar polyolefin is preferably polypropylene (PP).
• the composite film has at least two, preferably exactly two layers of the acid groups and / or acid anhydride groups and / or polymer derived therefrom and at least one, preferably exactly one layer of the polyolefin, the latter preferably between the at least two or exactly two layers of the acid groups and / or acid anhydride groups and / or polymer derived therefrom groups is arranged. It is thus particularly preferable to use a film with a sequence of EAA polyolefin EAA or EMAA polyolefin EMAA as the composite film, wherein the polyolefin is preferably polypropylene.
• At least one further layer of a further polymer is arranged, in particular as adhesion promoter or as adhesion-promoting Layer or location can serve.
• the further polymer may in particular be a polyolefin, in particular a polyethylene, more preferably LDPE (low density polyethylene).
• LDPE low density polyethylene
• composite films with a sequence with five layers are particularly preferred.
• a galvanic element according to the invention preferably has at least one lithium-intercalating electrode.
• positive electrodes based on MnO 2 (manganese dioxide). These usually contain a polymer binder, for example a polyvinylidene fluoride-hexafluoropropylene copolymer (eg Kynar® Flex 2801 from Arkema).
• the electrolyte used is generally a solution of a lithium salt (eg LiCICU) in common organic carbonates, for example in propylene carbonate.
• the at least one positive electrode in preferred embodiments is directly connected to the housing.
• the connection to the housing is preferably made, as described in DE 10 2004 038 072. So z. B. by lamination, a composite of positive electrode and separator produced and connected according to the instructions in DE 10 2004 038 072 via an electrically conductive connection means fixed to the housing.
• the production of a composite of positive electrode and separator is preferably carried out as described in DE 101 25 619.
• the corresponding contents of the mentioned DE 10 2004 038 072 and DE 101 25 619 are hereby incorporated by reference into the content of this description.
• a galvanic element according to the invention preferably comprises metallic lithium.
• a galvanic element according to the invention in preferred embodiments, therefore, it is a lithium primary cell.
• the lithium is preferably pressed onto one of the housing parts or onto one of the half-parts and is then present as a thin layer.
• the foil housing of a galvanic element according to the invention consists in preferred embodiments of copper and / or a copper alloy.
• a copper alloy in particular copper-magnesium alloys are very suitable.
• the plastic films used according to the invention in particular against such housing materials a particularly good adhesion.
• a galvanic element according to the invention is designed as a flat cell. Preferably, it has a cell height of not more than 500 ⁇ m. Its cell capacity is usually not more than 50 mAh.
• a multilayer composite film according to the invention comprises at least two, preferably exactly two layers of the acid groups and / or acid anhydride groups and / or polymer derived therefrom, at least one, preferably exactly one layer of a polyolefin, these preferably between the layers of the acid groups and / or acid anhydride groups and / or polymer derived therefrom is arranged.
• the composite film according to the invention further comprises at least one further layer of the above-described further polymer, in particular between the at least one layer of the polyolefin and the polymer having at least two layers of the acid groups and / or acid anhydride groups and / or groups derived therefrom.
• a composite film according to the invention has a thickness of between 50 ⁇ m and 250 ⁇ m, preferably between 80 ⁇ m and 120 ⁇ m.
• the thickness of the at least two layers of the acid and / or acid anhydride group-containing polymer is preferably between 5 .mu.m and 90 .mu.m (in each case), that of the layer of at least one polyolefin between 5 .mu.m and 100 .mu.m and that of the at least one further Layer of the further polymer between 1 ⁇ m and 20 ⁇ m.
• the composite film according to the invention can be produced, for example, by calendering or by coextrusion.
• the abovementioned use according to the invention relates to the use of a multilayer composite film having at least one layer of the acid groups and / or acid anhydride groups and / or polymers derived therefrom, in particular a composite film according to the invention, for sealing the housing of a galvanic element, in particular a galvanic element according to the invention element.
• the galvanic elements according to the invention are suitable, in particular, as energy stores for chip cards, in particular for electronic chip cards.
• the film housing of a galvanic element according to the invention is designed correspondingly very thin, as a rule, it has a thickness between 15 .mu.m and 60 .mu.m, in particular between 30 .mu.m and 40 .mu.m.
• An electronic chip card according to the invention is characterized in that it has a galvanic element according to the invention.
• Suitable chip cards in which a galvanic element according to the invention can be installed are known, for example, from DE 103 04 824, to the contents of which reference is hereby made.
• a three-layer composite film according to the invention was prepared by superimposing two EAA films (monolayer) having a thickness of 30 ⁇ m and a PP film having a thickness of 50 ⁇ m in the sequence EAA-PP-EAA and calendering at 100 ° C. were.
• the resulting composite film had a total thickness of about 110 microns.
• Another five-layer composite film according to the invention was produced by co-extrusion from EAA, LDPE and PP with the sequence EAA-LDPE-PP-LDPE-EAA.
• EAA-LDPE-PP-LDPE-EAA the sequence of EAA-LDPE-PP-LDPE-EAA.
• the product "Affinity TM" from Dow Chemicals can be used as LDPE It has been found that this product is very well suited as a bonding agent between the acid and acid anhydride group-containing EAA and the nonpolar polypropylene (PP)
• the individual layers in the composite film had the following thicknesses: EAA: 25 ⁇ m (each)
• a galvanic element according to the invention was produced by impregnating a positive electrode based on manganese dioxide (MnO.sub.2) with a liquid lithium electrolyte under inert gas and placing it in a housing part made of copper foil.
• a positive electrode based on manganese dioxide (MnO.sub.2)
• a liquid lithium electrolyte under inert gas
• a negative electrode a lithium foil was used, which was pressed into a second housing part made of copper foil, which was roughened by copper crystallites.
• the housing part with the positive electrode was then assembled with the housing part with the negative electrode, wherein a five-layer composite film, which was prepared as described, between the housing parts was arranged. Subsequently, the sealing of the flat cell was carried out by pressing together the two housing parts and the interposed composite film with simultaneous heating to about 105 0 C to 115 0 C.
• a Gezzateil made of metal foil of a galvanic element according to the invention for illustration is shown (top view).
• a positive or a negative electrode is applied.
• the composite film according to the invention is arranged as a circumferential strip in the region 1.
• Another Gescouse sauteil (metal foil) with the entgecalled polarized electrode can then be placed from above. By pressure and heating in the edge region 1 can then be done a seal.
• the sequence of housing film-EAA-PP-EAA housing film then results when using a three-layer composite film in the edge region.
• two or more composite films can be arranged between the housing films.
• the use of a three-layer composite film in the edge region would then result in the sequence of casing EAA-PP-EAA-EAA-PP-EAA housing film.
• Galvanic elements produced in this way pass the ISO bending test according to DIN-ISO 7816-1 and also comply with the test specification according to DIN-ISO / IEC 10 373. In addition, they show very good properties with respect to their impermeability (water vapor barrier). They are significantly improved over conventional products in terms of their discharge capacity after prolonged storage at room temperature and with regard to the increase of the internal resistance of the cell.
• Fig. 2 illustrates the greatly improved water-barrier properties of the three-layer composite film according to the invention.
• Braunstein cathodes which have been dried in vacuum and which are very hygroscopic were packaged and stored in copper housings with a sealing film of EVA known from the prior art as reference and in the other case with the composite film according to the invention.
• the results in FIG. 2 show that the water values with the composite film according to the invention (solid line in FIG. 2) are significantly lower than with the reference film (dashed line in FIG. 2). Essentially identical results can be achieved with the five-layer composite film.
• Fig. 3 shows the discharge curve of a primary flat cell according to the invention with the three-ply sealing film.
• the time-voltage curve illustrates the undisturbed discharge of moisture.

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• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Electrochemistry (AREA)
• General Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Manufacturing & Machinery (AREA)
• Inorganic Chemistry (AREA)
• Mechanical Engineering (AREA)
• Sealing Battery Cases Or Jackets (AREA)
• Laminated Bodies (AREA)
• Primary Cells (AREA)

Applications Claiming Priority (2)

Publications (1)

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• 2008
  • 2008-03-20 DE DE200810015965 patent/DE102008015965A1/de not_active Withdrawn
• 2009
  • 2009-03-19 US US12/933,514 patent/US20110070482A1/en not_active Abandoned
  • 2009-03-19 JP JP2011500119A patent/JP2011515803A/ja not_active Abandoned
  • 2009-03-19 KR KR20107020890A patent/KR20110003323A/ko not_active Application Discontinuation
  • 2009-03-19 WO PCT/EP2009/002020 patent/WO2009115324A1/de active Application Filing
  • 2009-03-19 EP EP09721431A patent/EP2255400A1/de not_active Withdrawn
  • 2009-03-19 CN CN2009801099702A patent/CN101978529A/zh active Pending

Non-Patent Citations (1)

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