EP4631119A1 - Electrode et électrolyte pour batterie lithium-ion incorporant un composé polymère - Google Patents
Electrode et électrolyte pour batterie lithium-ion incorporant un composé polymèreInfo
- Publication number
- EP4631119A1 EP4631119A1 EP23814498.4A EP23814498A EP4631119A1 EP 4631119 A1 EP4631119 A1 EP 4631119A1 EP 23814498 A EP23814498 A EP 23814498A EP 4631119 A1 EP4631119 A1 EP 4631119A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- electrolyte
- weight
- lithium
- acrylonitrile
- electrode
- 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.)
- Pending
Links
Classifications
-
- 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
- H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
- H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
- H01M10/0565—Polymeric materials, e.g. gel-type or solid-type
-
- 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
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- 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
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/621—Binders
- H01M4/622—Binders being polymers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2300/00—Electrolytes
- H01M2300/0017—Non-aqueous electrolytes
- H01M2300/0065—Solid electrolytes
- H01M2300/0082—Organic polymers
-
- 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
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/136—Electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy
-
- 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
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/139—Processes of manufacture
- H01M4/1397—Processes of manufacture of electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy
-
- 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
- TITLE Electrode and electrolyte for lithium-ion battery incorporating a polymer compound
- the present invention relates, in general, to all-solid-state batteries, and in particular to all-solid-state lithium-ion batteries.
- the invention relates to a material for an electrolyte and a material for an all-solid lithium-ion battery electrode incorporating a polymer compound and, more particularly, to an electrolyte and a polymeric binder comprising poly(acrylonitrile-co-methyl acrylate) (PAN-co-MA) and lithium salt.
- PAN-co-MA poly(acrylonitrile-co-methyl acrylate)
- the solid electrolyte must ensure its role as a separator and therefore also have sufficient mechanical properties to avoid the growth of Li-metal dendrites at the negative electrode.
- POE polymer poly(ethylene oxide)
- LiFePO4 iron phosphate
- POE is easy to shape, has good mechanical strength and thermal stability well above 100°C, unlike liquid electrolytes based on carbonates.
- POE only operates at a high temperature of 80°C and its potential stability window is reduced, ranging from 0 to 3.8V vs Li+/Li, which limits its use as a separator but also as a polymer binder. of electrode, when used facing active materials with high potential. This prevents the use of high potential cathode materials, limiting the energy density of such cells.
- the invention therefore aims to remedy these drawbacks and to propose a material for an all-solid lithium-ion battery conferring improved electrochemical stability in potential and allowing operation at a temperature below 80°C.
- an assembly for a lithium-ion battery comprising an electrolyte and an electrode, the electrolyte comprising poly(acrylonitrile-co-methyl acrylate) and lithium salt and/or the electrode incorporating a polymeric binder comprising poly(acrylonitrile-co-methyl acrylate) and lithium salt.
- the electrolyte comprises poly(acrylonitrile-co-methyl acrylate) and lithium salt.
- the polymeric binder of the electrode comprises poly(acrylonitrile-co-methyl acrylate) and lithium salt.
- PAN-co-MA in the electrode does not cause parasitic reactions and allows good maintenance of the electrode. Its use is suitable as an electrode binder.
- the electrolyte and the polymeric binder of the electrode comprise poly(acrylonitrile-co-methyl acrylate) and lithium salt.
- the compound poly(acrylonitrile-co-methyl acrylate) (PAN-co-MA) allows operation of the all-solid-state lithium battery at room temperature, and having a wide window of potential stability, makes possible the use of high potential cathode materials.
- the energy density of cells integrating this polymeric compound is high.
- the invention relates to an assembly for a lithium-ion battery, comprising an electrolyte and an electrode, the electrolyte comprising poly(acrylonitrile-co-methyl acrylate) and lithium salt and/or the electrode incorporating a polymeric binder comprising poly(acrylonitrile-co-methyl acrylate) and lithium salt.
- the lithium-ion battery assembly according to the invention can be incorporated into an all-solid or semi-solid lithium-ion battery cell.
- the electrode of the lithium-ion battery assembly may comprise a polymeric binder comprising PAN-co-MA and lithium salt.
- the lithium salt may contain lithium bis(trifluoromethanesulfonyl)imide (LiTF SI).
- the lithium salt may consist of LiTF SI.
- the polymeric binder of the electrode incorporates between 1 and 40% by weight of PAN-co-MA relative to the total weight of the electrode, and more preferably, the polymeric binder of the electrode incorporates between 20 and 40 % by weight of PAN-co-MA relative to the total weight of the electrode.
- the polymeric binder of the electrode incorporates between 1 and 20% by weight of lithium salt, preferably between 5 and 15% by weight of lithium salt.
- the PAN-co-MA comprises between 50 and 99% by weight of acrylonitrile, and more preferably between 80 and 99% by weight, relative to the total weight of the PAN-co-MA in the polymer binder of the electrode.
- the electrolyte of the lithium-ion battery assembly may include PAN-co-MA and lithium salt.
- the electrolyte incorporates between 50 to 95% by weight of PAN-co-MA, and more preferably between 70 and 90% by weight, relative to the total weight of the electrolyte.
- the electrolyte incorporates between 5 to 60% by weight of lithium salt, and more preferably between 15 and 35% by weight, relative to the total weight of the electrolyte.
- the electrolyte may incorporate liquid electrolyte comprising lithium salt.
- the liquid electrolyte may be a liquid electrolyte based on carbonates.
- the electrolyte comprises between 40 and 80% of liquid electrolyte relative to the total weight of the electrolyte.
- the PAN-co-MA comprises between 50 and 99% by weight of acrylonitrile, and more preferably between 80 and 99% by weight, relative to the total weight of the PAN-co-MA in the electrolyte.
- the invention also relates to a process for manufacturing an electrolyte for a lithium-ion battery.
- PAN-co-MA and lithium salt are mixed in an aprotic polar solvent.
- the solvent may be dimethyl sulfoxide (DMSO).
- the mixture obtained is stirred at room temperature until the PAN-co-MA and the lithium salt dissolve in the solvent.
- the mixture is coated on a current collector.
- the current collector is, for example, a sheet of aluminum.
- the first step between 50 and 95% by weight of PAN-co-MA, preferably between 70 and 90% by weight, are mixed in the solvent. These mass proportions are considered in relation to the total weight of PAN-co-MA and lithium salt.
- a liquid electrolyte based on carbonates can be added after drying of the coating.
- an aprotic solvent is also added to the coating, for example DMSO.
- liquid electrolyte Preferably, between 40 and 80% by weight of liquid electrolyte can be added. These mass proportions are considered in relation to the total weight of the semi-solid electrolyte.
- Lithium-ion battery The invention relates to a cell for a lithium-ion battery comprising an assembly as described above.
- the lithium-ion battery cell may comprise an anode, a cathode, and an electrolyte.
- the cathode and the electrolyte can be formed by an assembly incorporating PAN-co-MA and lithium salt as described previously.
- the invention also relates to a lithium-ion battery, comprising at least one cell or at least one assembly as described above.
- the lithium-ion battery can be an all-solid-state battery or a semi-solid-state battery.
- the invention further relates to a motor vehicle comprising at least one lithium-ion battery as described above.
- the lithium-ion battery assembly as described above be incorporated into a lithium-ion traction battery, for example a motor vehicle.
- lithium-ion battery assembly as described above be incorporated into any other type of lithium-ion battery, not intended to be involved in a traction movement.
- the invention also relates to a use of an assembly as described above in a lithium-ion battery for operation of the lithium-ion battery at room temperature.
- the present invention is illustrated in a non-limiting manner by the following examples of a process for forming a binder for an electrode and an electrolyte incorporating PAN-co-MA polymer and lithium salt.
- Example 1 Electrode comprising a polymeric binder
- a composite electrode was formulated using PAN-co-MA polymer as a binder.
- a composition was formed by adding 6% by weight of PAN-co-MA in N-methyl-2-pyrrolidone (NMP) solvent, then 2% by weight of lithium salt LiTF SI. These mass proportions are calculated by relative to the total weight of the mixture consisting of the solvent, the PAN-co-MA and the lithium salt.
- NMP N-methyl-2-pyrrolidone
- composition is mixed using a mechanical mixer overnight at 50°C to obtain a polymeric binder in gel form.
- LiFePO4 LiFePO4
- Timcal SuperC65 carbon 40% by weight of the polymer gel obtained previously are deposited so as to obtain 30% by weight of PAN-co-MA and 10% by weight of LiTF SI in the composite electrode.
- the mixture is mixed in a thinky mixer several times 5 min at 1000 rpm before being coated on a carbon-coated aluminum strip.
- the coating is left to dry overnight at 80°C in the open air.
- the electrode thus obtained is then tested electrochemically, facing lithium metal in the presence of a LPX liquid electrolyte based on carbonate and a lithium salt.
- composition of the LPX liquid electrolyte is 1 mol/L of lithium salt LiPFe in Ethylene carbonate (EC): Dimethyl carbonate (DMC): Ethyl methyl carbonate (EMC) in the following proportions 1: 1: 1 by volume.
- EC Ethylene carbonate
- DMC Dimethyl carbonate
- EMC Ethyl methyl carbonate
- PAN-co-MA provides good support for the electrode and does not cause parasitic reactions. Its use is therefore suitable and particularly advantageous as a binder for an electrode.
- a solid electrolyte film was formulated using PAN-co-MA polymer.
- a composition is formulated by adding, in dimethyl sulfoxide (DMSO) solvent, 5% by weight of PAN-co-MA relative to the weight of DMSO in the composition, and 25% by weight of lithium salt LiTF SI relative to the weight of PAN-co-MA in the composition.
- DMSO dimethyl sulfoxide
- the composition is mixed using a mechanical mixer for 24 hours.
- composition is then coated on an aluminum strip using a doctor-blade set at 800 pm.
- the electrolyte sample is dried in an oven in the open air at 80°C overnight.
- the electrolyte sample is dried for 4 hours under vacuum at 80°C in order to remove impurities due to the solvent and water present in the air.
- An electrochemical cell with two electrodes was produced in a glove box using a 10 mm diameter button cell device.
- a solid electrolyte pellet incorporating PAN-co-MA previously obtained, as well as a piece of lithium 4 mm in diameter were placed between two stainless steel wedges. 2 drops of conventional liquid electrolyte based on LPX carbonates are then added, i.e. 58% by weight of liquid electrolyte relative to the total weight of solid and liquid electrolyte.
- the cell is subjected to electrochemical testing on a BioLogic potentiostat.
- a potential stability test by cyclic voltammetry is carried out up to 5.5V vs Li/Li + and at a temperature of 25°C.
- a potential stability of the cell was observed up to 5V vs Li/Li +.
- Example 3 Assembly comprising an electrolyte and an electrode comprising a polymeric binder
- An electrode was formulated in order to observe the galvanostatic cycling behavior of the electrolyte based on PAN-co-MA obtained in Example 2.
- the electrode composed of 50% by mass of LiFePO4 (LFP) as well as that 10% by mass of Timcal SuperC65 carbon, 30% by mass of PAN-co-MA and 10% by weight of LiTF SI, is obtained according to the process described in Example 1.
- An electrochemical cell with two electrodes was produced in a glove box using a 10 mm diameter button cell device.
- an electrode pellet of 8 mm in diameter incorporating PAN-co-MA obtained according to the process described in Example 1 a solid electrolyte pellet incorporating PAN-co-MA obtained according to the process described in example 2, as well as a piece of lithium 4 mm in diameter, were placed between two stainless steel wedges. 2 drops of conventional liquid electrolyte based on LPX carbonates are then added, i.e. 58% by weight of liquid electrolyte relative to the total weight of solid and liquid electrolyte.
- the cell is subjected to electrochemical testing on a BioLogic potentiostat.
- a potential stability test by cyclic voltammetry is carried out between 3.65V and 2.5V vs Li/Li + at a temperature of 40°C and at a cycling regime of C/20.
- a high capacity of 150 mAh/g was obtained during the first cycle and during the fifth charging cycle at 40°C.
- Such capacities at 40°C are greater than those obtained with a POE-based material placed opposite LFP.
- Example 4 Assembly comprising an electrolyte and an electrode comprising a polymeric binder
- An electrochemical cell was formulated according to the process described in Example 3 in which, not 2 drops, but 4 drops of conventional liquid electrolyte based on carbonates (LPX) were added.
- LPX liquid electrolyte based on carbonates
- the cell is subjected to electrochemical testing on a BioLogic potentiostat.
- a potential stability test by cyclic voltammetry is carried out between 3.65V and 2.5V vs Li/Li + at a temperature of 25°C and at a cycling regime of C/20.
- the capacity obtained is greater than the capacity obtained in Example 3.
- a high capacity of 170 mAh/ga was obtained during the first charging cycle at 25°C then, during the fifth cycle, a capacity of 125 mAh /g.
- Tests at 25°C were also carried out at higher cycling speeds. AC/10 and C/5, we observe a capacity of 80 and 60 mAh/g, respectively.
- Such capacities at 25°C are greater than those obtained with a POE-based material placed opposite LFP.
- liquid electrolyte such as a carbonate-based electrolyte
- Polymer compounds based on PAN-co-MA are therefore particularly advantageous for use as a solid or semi-solid electrolyte and as an electrode binder in lithium-ion batteries.
- PAN-co-MA in the electrolyte and/or the electrode of a lithium-ion battery cell allows galvanostatic cycling at room temperature, electrochemical stability above 4.5 V vs Li/Li+ at room temperature, facing lithium metal
- PAN-co-MA thus allows operation at room temperature, and presents a wide potential stability window, allowing the use of high potential cathode materials.
- the energy density of such cells is optimized.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Dispersion Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Inorganic Chemistry (AREA)
- Secondary Cells (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2212880A FR3143203B1 (fr) | 2022-12-07 | 2022-12-07 | Electrode et électrolyte pour batterie lithium-ion incorporant un composé polymère |
| PCT/EP2023/083838 WO2024120976A1 (fr) | 2022-12-07 | 2023-11-30 | Electrode et électrolyte pour batterie lithium-ion incorporant un composé polymère |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4631119A1 true EP4631119A1 (fr) | 2025-10-15 |
Family
ID=85278394
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23814498.4A Pending EP4631119A1 (fr) | 2022-12-07 | 2023-11-30 | Electrode et électrolyte pour batterie lithium-ion incorporant un composé polymère |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4631119A1 (fr) |
| CN (1) | CN120604360A (fr) |
| FR (1) | FR3143203B1 (fr) |
| WO (1) | WO2024120976A1 (fr) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6090504A (en) * | 1997-09-24 | 2000-07-18 | Korea Kumho Petrochemical Co., Ltd. | High capacity composite electrode and secondary cell therefrom |
| JP3733404B2 (ja) * | 2001-05-22 | 2006-01-11 | 富士重工業株式会社 | リチウム二次電池用正極およびリチウム二次電池 |
| JP2014191915A (ja) * | 2013-03-26 | 2014-10-06 | Nitto Denko Corp | 蓄電デバイス用電極およびそれを用いた蓄電デバイス |
-
2022
- 2022-12-07 FR FR2212880A patent/FR3143203B1/fr active Active
-
2023
- 2023-11-30 CN CN202380091100.7A patent/CN120604360A/zh active Pending
- 2023-11-30 WO PCT/EP2023/083838 patent/WO2024120976A1/fr not_active Ceased
- 2023-11-30 EP EP23814498.4A patent/EP4631119A1/fr active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| WO2024120976A1 (fr) | 2024-06-13 |
| CN120604360A (zh) | 2025-09-05 |
| FR3143203B1 (fr) | 2025-12-26 |
| FR3143203A1 (fr) | 2024-06-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3341987B1 (fr) | Batterie au lithium-ion gelifiee | |
| EP3103155B1 (fr) | Batteries au lithium spécifiques comprenant des électrolytes non aqueux à base de composés sulfones | |
| EP3973587A1 (fr) | Composition d'electrolyte comprenant un mélange de sels de lithium | |
| EP3042410B1 (fr) | Additifs pour améliorer la conductivité ionique des électrodes de batteries lithium-ion | |
| EP3714499B1 (fr) | Utilisation du nitrate de lithium en tant que seul sel de lithium dans une batterie au lithium gélifiée | |
| FR3071360A1 (fr) | Electrolyte polymere solide comprenant un polymere solvatant, un sel de lithium et un polymere halogene selectionne et batterie le comprenant | |
| CA2956857A1 (fr) | Materiau d'electrode, electrode et batterie tout solide comprenant un oxyde complexe de structure olivine | |
| WO2024120976A1 (fr) | Electrode et électrolyte pour batterie lithium-ion incorporant un composé polymère | |
| EP3549192B1 (fr) | Amelioration de la conductivite ionique d'electrolyte a base de sels de lithium d'imidazolate | |
| WO2024241002A1 (fr) | Electrolyte a haute concentration en lifsi | |
| WO2024126799A1 (fr) | Électrodes négatives à base de silicium et d'additif fluoré | |
| Johnson et al. | Impact of Binder Thin-Films on Surface Chemistry of Silicon Anodes in Lithium-Ion Batteries | |
| EP3647443B1 (fr) | Électrode négative spécifique à base de lithium et générateur électrochimique au lithium comprenant une telle électrode négative | |
| FR3127847A1 (fr) | procédé de fonctionnement d’une batterie au lithium | |
| EP3186846B1 (fr) | Batterie comprenant un materiau pour électrode négative adherant au collecteur de courant anodique | |
| FR2997228A1 (fr) | Electrode negative pour cellule electrochimique de stockage d'energie, cellule electrochimique et batterie correspondantes et leur utilisation dans un vehicule electrique | |
| EP4254543A1 (fr) | Électrode négative spécifique à base de lithium et générateur électrochimique au lithium comprenant une telle électrode négative | |
| FR3072500B1 (fr) | Utilisation d'une batterie li-ion comprenant une anode contenant un alliage a base d'etain et d'antimoine | |
| EP3535797B1 (fr) | Électrolytes à base d'un additif spécifique du type liquide ionique pour batteries au lithium | |
| EP4736252A1 (fr) | Electrolyte et accumulateur lithium-ion le comprenant | |
| WO2025003609A1 (fr) | Électrolyte et accumulateur lithium-ion le comprenant | |
| EP3648206A1 (fr) | Accumulateur électrochimique au lithium du type lithium-soufre comprenant un matériau d'électrode négative spécifique |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: UNKNOWN |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
| 17P | Request for examination filed |
Effective date: 20250630 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
| DAV | Request for validation of the european patent (deleted) | ||
| DAX | Request for extension of the european patent (deleted) | ||
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |