EP2841221A1 - Method for obtaining a metal component from a lost form - Google Patents
Method for obtaining a metal component from a lost formInfo
- Publication number
- EP2841221A1 EP2841221A1 EP13719981.6A EP13719981A EP2841221A1 EP 2841221 A1 EP2841221 A1 EP 2841221A1 EP 13719981 A EP13719981 A EP 13719981A EP 2841221 A1 EP2841221 A1 EP 2841221A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- container
- thermosetting
- filling
- lost
- thermosetting element
- 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- Withdrawn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
- 239000002184 metal Substances 0.000 title claims abstract description 74
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 74
- 238000000034 method Methods 0.000 title claims abstract description 73
- 229920001187 thermosetting polymer Polymers 0.000 claims abstract description 95
- 239000000463 material Substances 0.000 claims abstract description 54
- 239000002019 doping agent Substances 0.000 claims description 16
- 239000011347 resin Substances 0.000 claims description 13
- 229920005989 resin Polymers 0.000 claims description 13
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 239000004576 sand Substances 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 2
- 239000000956 alloy Substances 0.000 claims description 2
- 238000005266 casting Methods 0.000 description 29
- 238000009434 installation Methods 0.000 description 28
- 239000012071 phase Substances 0.000 description 26
- 238000001816 cooling Methods 0.000 description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 238000007711 solidification Methods 0.000 description 6
- 230000008023 solidification Effects 0.000 description 6
- 229910001338 liquidmetal Inorganic materials 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910001092 metal group alloy Inorganic materials 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000012782 phase change material Substances 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052845 zircon Inorganic materials 0.000 description 1
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
- B22C9/046—Use of patterns which are eliminated by the liquid metal in the mould
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D15/00—Casting using a mould or core of which a part significant to the process is of high thermal conductivity, e.g. chill casting; Moulds or accessories specially adapted therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/04—Influencing the temperature of the metal, e.g. by heating or cooling the mould
Definitions
- the invention relates to the field of foundry and, more particularly, the field of processes using a lost model. It relates to a method for obtaining a cast metal part from a lost model. It also relates to a thermosetting element for the implementation of such a method.
- FR 2,685,229 (Automobiles Peugeot and Automobiles Citro ⁇ n) describes a method for obtaining metal parts from a lost model. According to this method, one or more models made of a sublimable material are placed in a container, the whole is embedded in sand leaving behind the casting conduits communicating at their upper part with a pouring cup and pouring liquid metal. through the tapping bucket. The lost model is sublimated when the liquid metal comes to replace it. The liquid metal solidifies on cooling so that the desired metal piece is obtained. Refrigerant elements have previously been placed in the container so that they are in contact with bearing faces of the lost model which correspond to zones of the metal part whose mechanical characteristics must be important.
- the metal part thus obtained has the disadvantage of having a structure of the material which is insufficiently thin.
- such a metal part has a porosity rate which is important, which is detrimental. It follows that such metal parts have mechanical characteristics that deserve to be improved.
- such a metal part is inhomogeneous with regard to its structure, its compactness and its mechanical characteristics due to the fact that the cooling elements are not in contact with free faces of the lost model which offer characteristics degraded with respect to the faces against which the cooling elements are positioned.
- the object of the present invention is to provide a method for obtaining a cast metal part from a lost model, the method for controlling and accelerating a solidification of the cast metal part, the latter comprising a fine structure, low porosity and improved mechanical characteristics, especially with regard to a coefficient of elongation of the metal part thus obtained.
- Another object of the present invention is to provide such a method for obtaining parts having a complex geometry, including nooks, for a modest cost.
- a method of the present invention is a method for obtaining a metal part from a lost model disposed inside a container.
- the method comprises a step of filling the container with a filling material.
- the method comprises a step of introducing a thermosetting element into contact with at least one free face that includes the lost model.
- the step of introducing the thermosetting element is prior to the step of filling the container with the filling material.
- the step of introducing the thermosetting element is subsequent to the step of filling the container with the filling material.
- the method advantageously comprises a step of setting up at least one cooler against a bearing face that includes the lost model, the step of setting up the cooler being prior to the container filling step with the filling material.
- the step of placing the cooler is for example prior to the step of introducing the thermosetting element.
- the implementation step of the cooler is for example subsequent to the step of introducing the thermosetting element.
- the method advantageously comprises a step of admission of a phase-change element in contact with the thermosetting element, the step of admission of the phase-change element being subsequent to the step of introduction of the thermosetting element.
- the thermosetting element is advantageously able to solidify consecutively to a step of delivering a molten metal inside the container.
- thermosetting element of the present invention is a thermosetting element for the implementation of such a method, the thermosetting element being mainly recognizable in that the thermosetting element comprises a base material associated with a thermosetting resin.
- the base material advantageously consists of at least one of a sand, a metal or an alloy.
- the base material is indifferently made of a steel or tin.
- a first volume proportion of the base material is between 55% and 85% of a total volume of the thermosetting element and a second volume proportion of the thermosetting resin is between 10% and 20% of the total volume of the thermosetting element.
- the thermosetting element advantageously comprises a first doping agent indifferently consisting of an aluminum powder or a graphite powder.
- a third volume proportion of this first doping agent is between 10% and 20% of the total volume of the thermosetting element.
- thermosetting element advantageously comprises a second doping agent consisting of metal needles indifferently steel or tin.
- a fourth volume proportion of the second doping agent is between 5% and 15% of the total volume of the thermosetting element.
- - Fig.1 to Fig.4 are schematic sectional illustrations of a container for the implementation of respective variants of a method according to the present invention.
- - fig.5a to fig.5f, fig.6a to fig.6c, fig.7a and fig.7b, fig.8a to fig.8c, fig.9a to fig.9c, fig.10a and fig.10b, Fig.1 1 and Fig.12 are respective schematic illustrations of alternative embodiments of the method according to the present invention.
- a container 1 is provided to accommodate at least one lost model 2.
- the latter is shaped and dimension identical to a metal part that is desired.
- the lost model 2 is made of a fusible material, such as wax, polystyrene or the like.
- the lost model 2 is embedded inside a filling material 3, such as silica sand or the like, which partially completes the lost model 2 to fill the container 1.
- the container 1 houses a filling system also made of fuse material.
- the container 1 is preferably provided with a device capable of delivering vibrations for packing the filling material 3 around the lost model 2.
- Molten metal 4 for example aluminum or the like, is cast so as to replace the lost model 2 by sublimating it.
- the filling system is able to guide the molten metal 4 from a reserve external to the container 1 to the lost model 2. This gives the desired metal part after solidification of the molten metal 4.
- the metal part obtained is for example a cylinder head intended to be used on a combustion engine of a motor vehicle, however the metal part obtained from the implementation of the present invention is likely to be any metal part.
- a cooler 5 is interposed between at least one support face 6 of the lost model 2 and the filling material 3.
- the cooler 5 is for example made of metal material.
- the bearing face 6 and the cooler 5 are preferably planar.
- the cooler 5 is intended to facilitate cooling of the molten metal 4 during solidification. More particularly, the cooler 5 is intended to accelerate the cooling of the bearing surface 6 of the lost model 2 with which the cooler 5 is in contact.
- the cooler 5 is likely to comprise at least one coil traversed by a coolant, such as water or the like.
- the cooler 5 advantageously constitutes a support element of the lost model 2 and / or the metal part obtained.
- the method of the present invention aims to bring into contact at least one free face 8 of the lost model 2 with a thermosetting element 7 prior to the casting of the molten metal 4.
- the contacting of the free face 8 with the thermosetting element 7 takes place before or after installation of the lost model 2 inside the container 1.
- the free face 8 is any face of the lost model 2, the free face 8 is nevertheless distinct from a bearing face 6.
- the free face 8 is a concave face optionally comprising one or more recesses.
- the free face 8 is for example a compression side of a cylinder head of the heat engine mentioned above. In the cases illustrated in FIGS. 2 and 4, where the method uses a cooler 5, the free face 8 is for example bordered by the bearing face 6.
- thermosetting element 7 is preferably made of a base material, of granular shape, which is coated with a thermosetting resin.
- the thermosetting element comprises at least one agent for curing the thermosetting resin under the effect of a heat source.
- the base material is indifferently a phase change material or not.
- the base material is for example a sand or a metal shot, such as a steel shot, a tin shot or a shot of an equivalent metallic alloy having in particular a low melting point, less than 250 ° C. or even less than 50 ° C, such as Sn 50 PbCdi 8 .
- a shot of tin or tin has the advantage of allowing faster solidification of the metal part than steel shot.
- the thermosetting resin is capable of creating thermal bridges between grains of the base material.
- a first doping agent such as an aluminum powder and / or a graphite powder, is preferably constitutive of the thermosetting element 7. Such a first doping agent is intended to thermally dope the latter to facilitate and accelerate hardening.
- a second doping agent such as metal needles, indifferently steel or tin, is preferably constituent of the thermosetting element 7. The needles have the advantage of increasing the compactness of the thermosetting element 7, which which allows an accelerated cooling of the free face 8.
- the second doping agent is made from a metal and / or a metal alloy comprising zinc, copper, zircon, chromite or the like.
- the thermosetting element 7 comprises, in volume proportion of the total volume of thermosetting element, 85% of base material and 15% of thermosetting resin.
- thermosetting element 7 comprises, in volume proportion of the total volume of thermosetting element, 70% of base material, 20% of thermosetting resin and 10% of the first doping agent.
- thermosetting element 7 comprises, in volume proportion of the total volume of thermosetting element, 65% of tin shot, 20% of thermosetting resin and 15% of the second doping agent.
- thermosetting element 7 comprises, in volume proportion of the total volume of thermosetting element, 55% of steel shot, 20% of thermosetting resin, 10% of first doping agent and % of second doping agent.
- the thermosetting element 7 is introduced inside the container 1 in precooked form, in other words in compact form.
- the thermosetting element 7 advantageously constitutes a rigid shell which at least partially envelops the lost model 2 by covering the free face 8.
- the thermosetting element 7 forms a cooling core, such as a foundry core. which is preformed prior to its introduction inside the container 1. In this case, the thermosetting element 7 can be handled in one piece because of its rigidity.
- thermosetting element 7 is introduced inside the container 1 in a loose form, in other words in pulverulent form. Under the effect of the heat released by the molten metal 4, the thermosetting element 7 solidifies to constitute in situ a self-forming cooler.
- thermosetting resin constituting the thermosetting element 7 solidifies to form a holding member of the lost model 2, then of the metal piece when the lost model 2 is sublimated. During this solidification, a quantity of heat from the molten metal 4 is consumed, so that a solidification of the thermosetting resin contributes advantageously cooling the free face 8. It also results in an improvement of a thermal effusivity of the thermosetting element 7, which further enhances its ability to cool the lost model 2.
- thermosetting element 7 is interposed between the free face 8 of the lost model 2 and a phase change element 1 1 which is provided to increase a heat consumption from the molten metal 4, and thus to facilitate a cooling of the free face 8.
- the phase change element 1 1 is indifferently a solid-liquid phase change element, a liquid-gas phase change element or an element with solid-gas phase change.
- the thermosetting element 7 forms a screen between the lost model 2, or the metal part obtained, and the phase-change element 11 so that the nature of the phase-change element is capable of be any such as water, liquid nitrogen, a foundry binder or the like.
- the presence of the phase change element 1 1 in contact with the thermosetting element 7 allows an acceleration of the cooling of the free face 8, from a phase change operated by the phase-change element 1 1 .
- a filling device allows the supply of the thermosetting element 7 and / or the phase change element 1 1 from the outside of the container 1 to a filling volume 9 adjacent to the free face 8 of the lost element 2.
- the filling device is indifferently a device for delivering the thermosetting element 7 and / or the phase-change element 11 by natural flow and / or by injection.
- the filling device comprises at least one channel 10 through which the cooler 5 passes to enable the thermosetting element 7 and / or the element to be placed in position. phase change 1 1 between the lost model 2 and the cooler 5.
- the channel 10 is formed through the cooler 5 at the level of the free face 8 and communicates with the filling volume 9.
- the latter is advantageously bordered by the support face 6 of the lost model 2 so as to prevent escape of the thermosetting element 7 and / or the phase change element 1 1 out of the filling volume 9. This prevention is facilitated by a flatness of the bearing face 6 and cooler 5.
- the implementation of such a method allows to cumulate the respective advantages of a gravity molding in a metal shell and a lost model method. More particularly, the metal part obtained has a structure and high mechanical characteristics and equivalent to those of a metal part obtained by a shell process, particularly with regard to a coefficient of elongation of the part.
- the implementation of such a method makes it possible to obtain metal parts having a complex geometry, in particular with concave zones having, for example, recesses.
- Such a method offers a manufacturing cost which is advantageously low and little higher than the lost model method of the prior art.
- Such a method also allows optimized production flexibility on an assembly line, for a modest investment compared to a lost mold process of the prior art and minimizing environmental pollution.
- the method of the present invention comprises:
- the method comprises successively:
- the method comprises successively:
- the method comprises successively:
- the method comprises, in succession:
- the method comprises successively:
- the method comprises successively:
- the method of the present invention comprises:
- the method comprises successively:
- the method comprises successively:
- the method comprises successively:
- the method of the present invention comprises: - a step of installation ⁇ inside the container 1 of the lost model 2 which has been previously coated with the thermosetting element 7 ,
- the method comprises, in succession:
- the method comprises successively:
- the method of the present invention comprises:
- the method of the present invention comprises successively:
- a filling step A of the container 1 with the filling material 3 a casting step of the molten metal Z.
- the method of the present invention comprises successively:
- the method of the present invention comprises successively:
- the method of the present invention comprises:
- thermosetting element 7 an introduction step B of the thermosetting element 7, a step of placing C of the cooler 5,
- the method comprises successively:
- the method comprises successively:
- the method comprises successively:
- the method of the present invention comprises:
- the method successively comprises:
- the method successively comprises:
- the method comprises successively:
- the method successively comprises:
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Mold Materials And Core Materials (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1253841A FR2989907B1 (en) | 2012-04-26 | 2012-04-26 | PROCESS FOR OBTAINING A METAL PIECE FROM A LOST MODEL |
PCT/FR2013/050740 WO2013160578A1 (en) | 2012-04-26 | 2013-04-04 | Method for obtaining a metal component from a lost form |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2841221A1 true EP2841221A1 (en) | 2015-03-04 |
Family
ID=48237129
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13719981.6A Withdrawn EP2841221A1 (en) | 2012-04-26 | 2013-04-04 | Method for obtaining a metal component from a lost form |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2841221A1 (en) |
FR (1) | FR2989907B1 (en) |
WO (1) | WO2013160578A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112139455A (en) * | 2020-10-12 | 2020-12-29 | 湖南塑源特科技有限公司 | Casting device for preventing air holes from being generated during workpiece casting and using method thereof |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2685229B1 (en) * | 1991-12-20 | 1995-05-24 | Peugeot | LOST MODEL MOLDING PROCESS AND REFRIGERANT ELEMENT FOR THE IMPLEMENTATION OF THIS PROCESS. |
DE19940828C1 (en) * | 1999-08-27 | 2001-01-25 | Bundesrep Deutschland | Forming attachment for load carrying fiber-reinforced component, e.g. bridge cable, involves shaping after heating to glass transition temperature |
FR2972655B1 (en) * | 2011-03-17 | 2015-02-27 | Peugeot Citroen Automobiles Sa | PROCESS FOR OBTAINING A METAL PIECE FROM A LOST MODEL |
-
2012
- 2012-04-26 FR FR1253841A patent/FR2989907B1/en active Active
-
2013
- 2013-04-04 EP EP13719981.6A patent/EP2841221A1/en not_active Withdrawn
- 2013-04-04 WO PCT/FR2013/050740 patent/WO2013160578A1/en active Application Filing
Non-Patent Citations (2)
Title |
---|
None * |
See also references of WO2013160578A1 * |
Also Published As
Publication number | Publication date |
---|---|
FR2989907A1 (en) | 2013-11-01 |
FR2989907B1 (en) | 2015-07-03 |
WO2013160578A1 (en) | 2013-10-31 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0152754B1 (en) | Foundry moulding process and mould for low-pressure precision casting with a gasifiable model and binderless sand mould | |
EP2983849B9 (en) | Monocrystalline smelting mould | |
WO2000027570A1 (en) | Method for making self-brazing components using powder metallurgy | |
EP2686121B1 (en) | Molding by a lost-pattern process with the creation of "self-forming" coolers | |
EP2357049B1 (en) | Lost pattern casting process and apparatus for the execution of this process | |
WO2013160578A1 (en) | Method for obtaining a metal component from a lost form | |
FR3073760A1 (en) | Insert element and method of manufacture | |
EP3645191B1 (en) | Foundry process with hot mold casting | |
FR2972656A1 (en) | Producing metal part e.g. cylinder head of heat engine of automobile vehicle from lost-wax model disposed inside container, by delivering molten metal to interior of container, and contacting phase changing element with free surface | |
EP2397245B1 (en) | Set of strata, mould, methods for producing said model and for manufacturing a part using said model | |
US20020108737A1 (en) | Mould structure for producing light metal alloy casts and a low pressure precision casting method in a semi permanent mould | |
EP0386384B1 (en) | Process for the lost foam casting under pressure of metal pieces | |
EP2158987A1 (en) | Lost-wax pattern casting process and mould for this process | |
EP2158986A1 (en) | Lost-wax pattern casting process and lost-wax pattern for this process | |
FR3108539A1 (en) | DIRECTED SOLIDIFICATION PROCESS FOR METAL ALLOYS AND MODEL IN ELIMINABLE MATERIAL FOR THE PROCESS | |
EP4061557B1 (en) | Foundry mold, method for manufacturing the mold and foundry method | |
FR2966066A1 (en) | Lost model casting models made of sublimable material in container/tank, by embedding models in sand by leaving pouring opening and pouring liquid metal into opening, and positioning cooling element in support against surfaces of model | |
EP1732718A2 (en) | Mould for casting a liquid metal and associated method | |
BE1010166A6 (en) | Abrasive tool and method of making this tool. | |
FR3073434A1 (en) | INSERTION ELEMENT AND METHOD OF MANUFACTURING | |
EP3194094A1 (en) | Lost pattern intended for use in casting | |
EP1305116A1 (en) | Impeller for centrifugal crushers with vertical axis and method for making same | |
BE670059A (en) | ||
FR2644087A2 (en) | Improvement to the method for lost-foam moulding of metallic components | |
BE701099A (en) |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
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 |
|
17P | Request for examination filed |
Effective date: 20141007 |
|
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 |
|
AX | Request for extension of the european patent |
Extension state: BA ME |
|
DAX | Request for extension of the european patent (deleted) | ||
17Q | First examination report despatched |
Effective date: 20151208 |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: PSA AUTOMOBILES SA |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: GRANT OF PATENT IS INTENDED |
|
INTG | Intention to grant announced |
Effective date: 20180216 |
|
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: 20180627 |