EP4326620A1 - Verfahren zum betreiben eines flugantriebssystems - Google Patents
Verfahren zum betreiben eines flugantriebssystemsInfo
- Publication number
- EP4326620A1 EP4326620A1 EP22719198.8A EP22719198A EP4326620A1 EP 4326620 A1 EP4326620 A1 EP 4326620A1 EP 22719198 A EP22719198 A EP 22719198A EP 4326620 A1 EP4326620 A1 EP 4326620A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- water
- reservoir
- flight
- propulsion system
- aircraft
- 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.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D33/00—Arrangement in aircraft of power plant parts or auxiliaries not otherwise provided for
- B64D33/04—Arrangement in aircraft of power plant parts or auxiliaries not otherwise provided for of exhaust outlets or jet pipes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/32—Collecting of condensation water; Drainage ; Removing solid particles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2220/00—Application
- F05D2220/30—Application in turbines
- F05D2220/32—Application in turbines in gas turbines
- F05D2220/323—Application in turbines in gas turbines for aircraft propulsion, e.g. jet engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2260/00—Function
- F05D2260/60—Fluid transfer
- F05D2260/608—Aeration, ventilation, dehumidification or moisture removal of closed spaces
Definitions
- the present invention relates to a method for operating an aircraft propulsion system.
- the drive unit of such a flight propulsion system can e.g. B. be an axial flow machine, which is functionally divided into compressor, combustion chamber and turbine. Air sucked in is compressed in the compressor, then propellant, e.g. B. kerosene, and this mixture is burned in the combustion chamber. The resulting hot or combustion gas flows through the turbine and is expanded there, whereby the gas is also partially extracted with energy for driving the compressor.
- a propeller or, in particular, a fan can be provided to generate propulsion, which is also driven by the turbine.
- Such an engine with a fan is also referred to as a ducted power engine.
- the drive system in question has a water discharger with which, for example in the case of the axial flow machine, water can be separated from the exhaust gas thereof.
- the present invention is based on the technical problem of specifying an advantageous method for operating a flight propulsion system and an advantageous flight propulsion system for an aircraft. According to the invention, this is achieved with the method according to claim 1 and the drive system according to claim 7 .
- the drive system has a reservoir for holding water.
- the water drain is used to dissipated, the z. B. results from the exhaust gas or generally from the operation of the drive unit.
- the water is not stored in the reservoir for the entire duration of the flight, which could be disadvantageous because of the increasing weight.
- the aircraft for example a passenger aircraft, is located in a layer of the atmosphere that is critical with regard to cloud formation, no water or at least less water should be released into the environment temporarily, which is why it is temporarily stored in the reservoir.
- clouds or contrails that would otherwise result is also discussed, for example, as an influencing factor in climate change and is undesirable.
- the aircraft is later in a less critical atmospheric layer, the water can be discharged from the reservoir to the environment. This reduces the weight and, accordingly, the thrust required to lift the aircraft.
- the water discharged with the water drain results very generally "from the operation of the drive unit", i.e. it results at least indirectly from its use generating the thrust.
- the water is removed from de ren exhaust gas, so are separated.
- the water can also result from the combustion, but in the case of a drive unit with a fuel cell, it can also result from the conversion of the water substance into electricity, with the actual generation of thrust then taking place, for example, via an electric motor.
- the hydrogen is used directly or indirectly, according to the present subject matter at least part of the resulting water can be temporarily stored and released later, but still in flight.
- a contrail or cloud formation can be at least prevented according to the invention, which otherwise, e.g. B. the exhaust gas, as a result of condensation in the cold ambient air can erge ben.
- At least part of the water released into the environment is discharged from the reservoir directly into the environment.
- "Immediately" means e.g. B. that the water is left in the same state of aggregation, i.e. it does not change state before it is drained.
- the water is preferably stored in liquid form in the reservoir, with it then being drained off in liquid form, at least in part, in the present variant.
- the liquid water could also have a
- Cloud formation can be critical, e.g. because the droplets can be "torn apart” at relatively high flight speeds, so that e.g. B. “microdrops” result.
- At least part of the water released from the reservoir to the environment is previously converted into gas and fed to a gas channel of the drive unit. In other words, the water becomes the
- the water vapor introduced into the gas channel e.g. B. be advantageous because of the required Verdi chterarb eit, namely compared to the same amount of air without water vapor require less work.
- the water vapor can also reduce nitrogen oxides in the exhaust gas, for example, because the water, with its comparatively high heat capacity, can prevent temperature peaks from occurring when the mixing ratios are locally uneven.
- the water vapor can also be used to cool components, for example gas channel walls or, in particular, blades. For this purpose it can, for example, flow through a channel system inside the component, in particular a blade.
- the water is temporarily stored as a function of atmospheric properties detected during the flight.
- the atmospheric properties can, for example, be recorded continuously or at least at intervals.
- an optimization can then be carried out, for example, that on the one hand the amount of water temporarily stored in the reservoir is kept as low as possible for reasons of weight, but on the other hand water discharge under critical
- Atmospheric properties is avoided.
- a dynamic evaluation is not obligatory, but rather the intermediate storage and delivery can also take place, for example, based on standard atmosphere data (e.g. as a function of an altitude, etc.).
- on-board sensors of the aircraft can be used to record various environmental parameters, for example flight altitude, relative humidity, external pressure, external temperature, etc.
- various criteria relating to formation and/or or the persistence of contrails can be used to check whether the Schmidt-Appleman Criterion is met and the formation and/or persistence of contrails can be derived from this.
- the outside temperature and the outside pressure can be used to check whether a water saturation vapor pressure is being exceeded, and this criterion can be used to decide whether the water is to be stored.
- the water can be stored at a relative humidity of at least 0.8 from an altitude of 9 km and / or at a relative humidity of at least 0.6 from an altitude of 9.4 km and / or at a relative humidity of at least 0.2 from a flight altitude of at least 9.7 km and/or at a relative humidity of 0 from a flight altitude of at least 10 km.
- the aircraft is caused to change its altitude if water is temporarily stored in the reservoir or a specific fill level is exceeded during the temporary storage. It can e.g. B. It can happen that the atmospheric properties favor cloud formation at a certain altitude, but are uncritical at another altitude. The caching of the water can bridge the time until this uncritical
- the drive system has, in addition to the drive unit and the water drain, the reservoir in which water can be temporarily stored during operation.
- the reservoir is equipped with a controllable drain that is controlled by a control unit.
- the controllable drain can have one or more controllable valves.
- the temporarily stored water can be fed to the environment via the outlet, directly in liquid form and/or indirectly by recirculation (in vapor form via the gas channel).
- the control unit, the z. B. can be provided as a separate module (z. B. microcontroller or ASIC) or integrated into the on-board computer, is set up to cause the drive system to carry out the presently disclosed method rens.
- the drained water can be temporarily stored in the reservoir (drain closed) or released to the environment (drain open).
- the reservoir can also be equipped with a controllable inlet, for example, through which the drained water enters the reservoir if it is to be stored temporarily, but alternatively it can also be routed past the reservoir (optional bypass if no intermediate storage is required).
- the control unit can, for example, also be part of a control loop, with z. B. the level of the reservoir can be included as a controlled variable.
- the flight propulsion system has sensors for measuring an air parameter, namely a temperature, a pressure and/or a water content of the air.
- the temperature can be recorded statically and/or as a total temperature, and a static and/or dynamic pressure can also be measured.
- the evaluation of the recorded data can take place with a separate evaluation unit, but on the other hand it can also be functionally integrated into the control unit.
- the control unit can initiate intermediate storage, optionally in connection with an initiation of an altitude change.
- the flight propulsion system has sensors for the optical detection of clouds. For example, this can be a rear-facing camera to detect condensation behind the aircraft.
- the optical detection of clouds enables an analysis of the current state, for example to control the air parameter-based control or as an alternative.
- the information obtained from this can serve as an input for the control unit.
- a preferred embodiment relates to the already discussed “causing the height change”, for which purpose the drive system has a signal generator. If, for example, water is temporarily stored in the reservoir due to critical atmospheric properties, i.e. if the water level rises or if it exceeds a certain threshold, a change in flight altitude can be initiated via the signal transmitter. As described above, this can take place via an external interface or, if integrated into the on-board computer, as an internal process. According to a preferred embodiment, the reservoir has a volume of such a size that the drained water can be received and temporarily stored therein for at least 2 minutes, preferably at least 5 minutes. This can, for example, relate to the amount of water discharged from the drive unit under CrwAe conditions.
- the volume is therefore preferably dimensioned in such a way that critical atmospheric layers can be “bridged” by intermediate storage, ie flown through and/or “bypassed” with an altitude adjustment.
- Obtaining the air traffic control clearances required for this can take a few minutes, for example, and critical layers can sometimes also be comparatively thin, for example only a few hundred meters thick.
- Possible upper limits of the volume or the storage period for which this is designed can be, for example, one hour, half an hour or just a quarter of an hour.
- the reservoir can, for example, have a volume of at least 2001, more preferably at least 3001 or 5001.
- Possible upper limits, which should be disclosed independently of the lower limits, can be, for example, at most 60001, 30001 or 15001.
- one advantage of at least partially draining during the flight can be the limitation of the necessary reservoir size, i.e. the tank itself is also significantly more compact and lighter compared to storage over the entire duration of the flight.
- the drive unit is a heat engine, in particular an axial flow machine
- the water discharger is a water separator that discharges the water from its exhaust gas.
- an exhaust gas treatment device in which the exhaust gas containing water vapor is cooled in the gas duct. With the cooling, at least a partial condensation of the water contained in the exhaust gas can be achieved, which results from the combustion of fossil fuels together with other products (CO2, etc.) or may have previously been introduced into the combustion chamber in vapor form.
- the exhaust gas treatment device can also have a droplet separator, which then separates the water condensed out by cooling in the exhaust gas duct, for example based on centrifugal force or inertia, for example as a cyclone or swirl separator or by abrupt deflection, etc.
- the heat engine can have a jacketed current-driven plant, but in general it can also be a turbojet or turboprop engine, for example.
- the flight propulsion system comes in one
- Aircraft used which can be manned or unmanned in general.
- the invention relates to the use of a flight propulsion system in a manner described here.
- FIG. 1 shows a schematic representation of a flight propulsion system according to the invention
- FIG. 2 shows an aircraft in a schematic representation.
- the drive unit 2 can be seen as a schematically indicated aircraft engine; in this example it has a low-pressure compressor 2.1a with a fan, a high-pressure compressor 2.1b, a combustion chamber 2.2, a high-pressure turbine 2.3b and a low-pressure turbine 2.3a. It is a so-called turbofan engine.
- an exhaust gas 3 from the low-pressure turbine 2.3a enters an exhaust gas duct 4 of the water discharger 20, which in the present case is designed as a water separator.
- the water 17 contained in the exhaust gas 3 is at least partially condensed and discharged.
- the water contained in the exhaust gas 3 could, for example, lead to condensation streaks (cirrus clouds), depending on the atmospheric properties.
- This z. With regard to the greenhouse effect, for example, cloud formation can be prevented with condensation.
- the condensed water 17 were stored over the entire duration of the flight, this would result in a significant additional weight, which z. B. would be disadvantageous in terms of fuel consumption. Therefore, although a reservoir 24 is provided according to the invention, the drained water 17 is only temporarily stored in it.
- the reservoir 24 is equipped with a controllable drain 30 comprising first and second controllable valves 70,71.
- the temporarily stored water can still be released to the environment 29 during the flight, i.e.
- the temporarily stored water can either be discharged directly, ie in liquid form, into the environment 29 via the controllable valve 71 , or it can be recirculated via the controllable valve 70 . In this case, it is fed to an evaporator 35, where it is brought into vapor form and then fed back to the engine 2, ie its gas channel 5, preferably the combustion chamber 2.2 (compare the introduction to the description in detail).
- a sensor system 64 for measuring an air parameter 65, a sensor system 63 for the optical detection of clouds 68 and a control unit 60 are also shown schematically.
- the air parameter 65 can include, for example, a temperature, a pressure and a water content of the air, from which the atmospheric properties can be determined.
- the sensor system 63 for the optical detection of clouds 68 can include a camera with which the formation of clouds behind the aircraft can be determined.
- the control unit 60 controls the valves 70 , 71 based on the air parameter 65 of the sensor system 64 and the optical detection of the sensor system 63 . Since the drain 30 includes two valves 70, 71, both the amount of water that is drained directly into the environment and the amount of water that is fed to the gas channel 5 can be controlled.
- control unit 60 can output a signal 67 via a signal generator 61, which causes the aircraft to change altitude if the reservoir 24 is filled in an atmosphere layer that is critical with regard to cloud formation.
- 2 shows a schematic representation of an aircraft 40 with two drive units 2.
- the sensors 63 for optically detecting the clouds 68 can be arranged in a tail part 47 of the fuselage 46, for example.
- the sensor system 64 for measuring the air parameter 65 can be arranged, for example, on the fuselage 46 or also on the drive unit 2, for example in the inlet in front of the fan 2.1a, in the bypass duct 50 or on the engine nacelle 51.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Aviation & Aerospace Engineering (AREA)
- Position Fixing By Use Of Radio Waves (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021109848.3A DE102021109848A1 (de) | 2021-04-19 | 2021-04-19 | Verfahren zum betreiben eines flugantriebssystems |
| PCT/DE2022/100280 WO2022223073A1 (de) | 2021-04-19 | 2022-04-12 | Verfahren zum betreiben eines flugantriebssystems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4326620A1 true EP4326620A1 (de) | 2024-02-28 |
Family
ID=81388902
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22719198.8A Withdrawn EP4326620A1 (de) | 2021-04-19 | 2022-04-12 | Verfahren zum betreiben eines flugantriebssystems |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20240209754A1 (de) |
| EP (1) | EP4326620A1 (de) |
| DE (1) | DE102021109848A1 (de) |
| WO (1) | WO2022223073A1 (de) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11635022B1 (en) | 2022-02-11 | 2023-04-25 | Raytheon Technologies Corporation | Reducing contrails from an aircraft powerplant |
| US11898491B1 (en) | 2022-07-21 | 2024-02-13 | Rtx Corporation | Water pressure and quantity monitoring for hydrogen steam injected and inter-cooled turbine engine |
| EP4390088A1 (de) * | 2022-12-21 | 2024-06-26 | MTU Aero Engines AG | Verfahren zum betreiben einer strömungsmaschine für einen flugantrieb |
| US20250078668A1 (en) * | 2023-08-29 | 2025-03-06 | Honeywell International Inc. | Systems and methods for diminishing vehicle contrails |
| US12555484B2 (en) | 2023-08-29 | 2026-02-17 | Honeywell International Inc. | Systems and methods for diminishing vehicle contrails |
| US12338751B2 (en) | 2023-08-30 | 2025-06-24 | Rtx Corporation | Centrifugal water molecular separation |
Family Cites Families (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4323719C2 (de) | 1993-07-15 | 1995-06-22 | Daimler Benz Aerospace Airbus | Verfahren und Einrichtung zur Durchführung des Verfahrens zur Wasserversorgung an Bord eines Flugzeuges |
| US6722136B2 (en) * | 2002-01-30 | 2004-04-20 | The Boeing Company | Aircraft engine water misting inter-cooler |
| US6834831B2 (en) | 2002-12-31 | 2004-12-28 | The Boeing Company | Hybrid solid oxide fuel cell aircraft auxiliary power unit |
| GB0710153D0 (en) | 2007-05-26 | 2007-07-04 | Rolls Royce Plc | Method and apparatus for suppressing aeroengine contrails |
| DE102009041190B4 (de) * | 2009-09-14 | 2012-04-19 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Vorrichtung und Verfahren zur Ermittlung und Anzeige klimarelevanter Wirkungen eines von einem Flugzeug erzeugten Kondensstreifen |
| US9311539B1 (en) * | 2009-12-09 | 2016-04-12 | The Boeing Company | Aircraft contrail detection |
| GB201211064D0 (en) | 2012-06-22 | 2012-08-01 | Rolls Royce Plc | Fuel system |
| GB2524774A (en) | 2014-04-02 | 2015-10-07 | Rolls Royce Plc | Aircraft vapour trail control system |
| GB201405894D0 (en) * | 2014-04-02 | 2014-05-14 | Rolls Royce Plc | Aircraft vapour trail control system |
| GB2524776B (en) | 2014-04-02 | 2016-10-12 | Rolls Royce Plc | Aircraft vapour trail control system |
| DE202014102091U1 (de) | 2014-05-05 | 2014-05-28 | Quazim Ismaili | Vorrichtung zur Brauchwassergewinnung für ein Luftfahrzeug |
| GB2531632B (en) | 2015-08-10 | 2017-01-11 | Latif Qureshi Masood | A mechanical device to suppress contrail formation |
| DE102018203159B4 (de) | 2018-03-02 | 2021-05-06 | MTU Aero Engines AG | Reduktion von Kondensstreifen beim Betrieb von Fluggeräten |
| US11305879B2 (en) | 2018-03-23 | 2022-04-19 | Raytheon Technologies Corporation | Propulsion system cooling control |
| DE102018208026A1 (de) | 2018-05-22 | 2019-11-28 | MTU Aero Engines AG | Abgasbehandlungsvorrichtung, Flugzeugantriebssystem und Verfahren zum Behandeln eines Abgasstromes |
| DE102019203595A1 (de) | 2019-03-15 | 2020-09-17 | MTU Aero Engines AG | Luftfahrzeug |
| GB2588216B (en) * | 2019-10-16 | 2022-07-27 | Gkn Aerospace Services Ltd | Aircraft fluid release systems |
| EP3875741A1 (de) * | 2020-03-04 | 2021-09-08 | Rolls-Royce plc | Gasturbinenmotor mit wassereinspritzung |
-
2021
- 2021-04-19 DE DE102021109848.3A patent/DE102021109848A1/de not_active Withdrawn
-
2022
- 2022-04-12 WO PCT/DE2022/100280 patent/WO2022223073A1/de not_active Ceased
- 2022-04-12 EP EP22719198.8A patent/EP4326620A1/de not_active Withdrawn
- 2022-04-12 US US18/555,828 patent/US20240209754A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| US20240209754A1 (en) | 2024-06-27 |
| DE102021109848A1 (de) | 2022-10-20 |
| WO2022223073A1 (de) | 2022-10-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP4326620A1 (de) | Verfahren zum betreiben eines flugantriebssystems | |
| WO2022028652A1 (de) | Abgasbehandlungsvorrichtung für ein flugtriebwerk | |
| DE69635318T2 (de) | Injektionsvorrichtung für tröpfchenförmige Flüssigkeit | |
| DE102023108845A1 (de) | Antriebssystem für ein luftfahrzeug | |
| DE102022133668A1 (de) | Variable eintrittsleitschaufeln | |
| DE102008006953B4 (de) | System und Verfahren zur Reduktion von Schadstoffen in Triebwerksabgasen | |
| DE102022133283A1 (de) | Luftfahrzeugantrieb | |
| WO2003038255A1 (de) | Verfahren zur steuerung der kühlluftmassenströme einer gasturbogruppe | |
| DE102023108831A1 (de) | Verfahren zur kontrolle der betankung eines luftfahrzeugs | |
| DE102022134117A1 (de) | Abgasgehalt | |
| DE102022133862A1 (de) | Leistungsparameter | |
| DE102022134126A1 (de) | Kraftstoffspeicher | |
| AT520886B1 (de) | Prüfstand für einen Prüfling | |
| DE102023108838A1 (de) | Verfahren zum bestimmen eines heizwerts von kraftstoff | |
| DE102004017879B4 (de) | System zur Luftaufbereitung | |
| DE102021102553A1 (de) | Gastankanordnung für eine Verbrennungsmaschine | |
| DE102022133524A1 (de) | Luftfahrzeugantriebssystem | |
| WO2021058250A1 (de) | Verfahren und vorrichtung zur ermittlung des vereisungszustands einer nicht direkt im abgasmassenfluss angeordneten komponente des abgasstrangs eines kraftfahrzeugs | |
| DE102022133274A1 (de) | Antriebssystemsteuerung | |
| DE102022133262A1 (de) | Flugprofil | |
| DE4114303C1 (en) | Recovery of liq. oxygen@ from air surrounding air-borne device e.g. aircraft - includes cooling air compressing, expanding, sepg. oxygen@ for cooling purposes, passing liq. nitrogen@ | |
| DE102016201685A1 (de) | Verfahren für den Axialkraftausgleich eines Rotors einer Gasturbine | |
| DE102022133529A1 (de) | Betrieb eines luftfahrzeugs | |
| DE102022133683A1 (de) | Flugkraftstoffmanagement | |
| DE102016001463A1 (de) | Verfahren zum Abblasen von Anodenabgas |
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: 20230915 |
|
| 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 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: EXAMINATION IS IN PROGRESS |
|
| 17Q | First examination report despatched |
Effective date: 20241011 |
|
| 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 |
|
| 18D | Application deemed to be withdrawn |
Effective date: 20250212 |