CN114410897A - Annealing device and driving device and protection method thereof - Google Patents
Annealing device and driving device and protection method thereof Download PDFInfo
- Publication number
- CN114410897A CN114410897A CN202111670832.0A CN202111670832A CN114410897A CN 114410897 A CN114410897 A CN 114410897A CN 202111670832 A CN202111670832 A CN 202111670832A CN 114410897 A CN114410897 A CN 114410897A
- Authority
- CN
- China
- Prior art keywords
- furnace body
- protective gas
- annealing
- driving device
- driving
- 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
- 238000000137 annealing Methods 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims description 9
- 230000001681 protective effect Effects 0.000 claims abstract description 34
- 238000010438 heat treatment Methods 0.000 abstract description 10
- 239000007789 gas Substances 0.000 description 42
- 239000000498 cooling water Substances 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000003915 air pollution Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Furnace Details (AREA)
Abstract
The invention relates to an annealing device, which comprises a furnace body, a rotating device, a heating device and a control device, wherein the rotating device is arranged in the furnace body, can rotate and is used for placing a workpiece or installing the heating device; the rotating shaft is connected with the rotating device and is used for driving the rotating device to rotate; the shaft hole is arranged on the furnace body and used for mounting the rotating shaft; the driving device is connected with the rotating shaft and drives the rotating shaft to rotate; the driving device is connected with the protective gas supply device, and the protective gas supply device can input protective gas with certain pressure into the driving device, so that the gas in the furnace body cannot enter the driving device. Because the protective gas is conveyed into the driving motor, the air pressure in the driving motor is larger than the air pressure in the furnace body, the air in the furnace body cannot enter the driving motor, and the protective gas can protect the motor from rusting.
Description
Technical Field
The present invention relates to a heat treatment apparatus in general, and more particularly to a furnace for annealing.
Background
Annealing is an important process in the production of metal parts. The metal material is processed to cause the free energy in the metal to be increased and to be in an unstable state, but the metal in the unstable state has the tendency of spontaneously recovering to a relatively complete, regular and free energy low stable state, however, at normal temperature, the atomic kinetic energy is small, the diffusion speed is slow, so that the tendency cannot be realized, and therefore, the annealing is required to be carried out through an annealing furnace.
The annealing process is to slowly heat the metal to a certain temperature, hold it for a sufficient time, and then cool it at a suitable rate. The hardness of the metal material can be reduced through other annealing, and the machinability is improved; the residual stress is reduced, the size is stabilized, and the deformation and crack tendency is reduced; refining grains, adjusting the structure and eliminating the structure defects.
Annealing stove among the prior art generally includes the box, installs the motor on the box, and the motor drives pivot and sets up the swivel mount in the box, can install heating device on the swivel mount for heating device can the even heating work piece, also can place the work piece on the swivel mount. For example, the chinese patent publication No. CN 212741472U discloses a multifunctional medium frequency annealing furnace for stainless steel welded pipe processing, which is the structure.
The structure needs to install the motor outside the box body, and the shaft hole is arranged on the wall of the box body. During the heating process of the annealing process, oil smoke and corrosive chemical substances may be generated, in some cases, various gases need to be introduced to treat the workpiece, and some gases are corrosive. The return treatment of the motor stator piece and the rotor piece needs a blue flower process and needs to be introduced with water vapor. Although the sealing ring can be arranged between the shaft hole and the rotating shaft, the situation that corrosive gas and water vapor enter the motor through a gap between the shaft hole and the rotating shaft and corrode the motor cannot be completely avoided.
For example, chinese patent publication No. CN 211872037U discloses an annealing furnace with a good temperature control effect, which includes a furnace body (1), a motor pad (3) is fixedly connected to the top of the furnace body (1), a motor (4) is fixedly connected to the top of the motor pad (3), a worm (5) is fixedly connected to the top of an output shaft of the motor (4), a worm wheel (6) is engaged with the outer wall of the worm (5), a driving rod (7) is fixedly connected to the bottom of the worm wheel (6), a bearing (8) is movably connected to the outer wall of the driving rod (7), a rotating plate (9) is fixedly connected to the bottom of the driving rod (7), and a heating rod (10) is fixedly connected to the middle of the bottom of the rotating plate (9). The motor is not directly connected with the driving rotating shaft, but is connected with the rotating shaft through the worm and the worm wheel, although corrosive gas can be prevented from entering the motor, the structure is complex, the weight is large, the motor cannot adapt to the well-type annealing furnace, and the motor cannot be installed on the top cover of the annealing furnace, so that the motor and the furnace cover can be conveniently detached. The structure can not prevent harmful gas from overflowing from the annealing furnace to enter the air, and the air pollution to the working environment is caused.
Disclosure of Invention
The invention aims to provide an annealing furnace, which can protect a motor of the annealing furnace from being corroded by gas in the furnace.
In order to solve the technical problem, the annealing device comprises a furnace body and a rotating device, wherein the rotating device is arranged in the furnace body, can rotate and is used for placing a workpiece or installing a heating device; the rotating shaft is connected with the rotating device and is used for driving the rotating device to rotate; the shaft hole is arranged on the furnace body and used for mounting the rotating shaft; the driving device is connected with the rotating shaft and drives the rotating shaft to rotate; the driving device is connected with the protective gas supply device, and the protective gas supply device can input protective gas with certain pressure into the driving device, so that the gas in the furnace body cannot enter the driving device.
Because the protective gas is conveyed into the driving motor, the air pressure in the driving motor is larger than the air pressure in the furnace body, the air in the furnace body cannot enter the driving motor, and the protective gas can protect the motor from rusting.
As a further limitation, the drive device includes a housing coupled to the shielding gas providing device.
By way of further limitation, the furnace body comprises a furnace cover, and the shaft hole, the rotating shaft and the driving device are mounted on the furnace cover.
Due to the arrangement of the furnace cover, the furnace cover can be conveniently disassembled and assembled, and the driving motor arranged on the furnace cover can also be conveniently disassembled and assembled.
As a further limitation, the housing includes a base and a barrel, the base and the barrel are connected by bolts, and the shielding gas providing device is connected to the base.
Because set up the base in barrel bottom, can come convenient dismouting base through dismouting bolt, protection gas conveyer pipe is lifted off in installation that can be convenient or, convenient the maintenance.
As a further limitation, a flange is arranged at the position where the shell and the furnace body are installed, and the shell and the furnace body are installed through the flange.
The installation of the flange plate can ensure that the motor shell and the furnace body are installed more tightly and airtightly, can prevent gas in the furnace body from leaking and can also prevent protective gas from leaking.
The invention also relates to a driving device of the annealing device, which is connected with the rotating shaft and comprises a shell, wherein the shell is connected with the protective gas supply device, and the protective gas supply device can input protective gas with certain pressure into the driving device, so that the gas in the furnace body cannot enter the driving device.
The furnace body comprises a furnace cover, and the shaft hole, the rotating shaft and the driving device are arranged on the furnace cover.
The shell comprises a base and a barrel body, the base is connected with the barrel body through bolts, and the protective gas supply device is connected to the base or the barrel body.
The shell and the furnace body are arranged on the flange plate, and the shell and the furnace body are arranged through the flange plate.
The invention also relates to a protection method of the driving device of the annealing device, which inputs protective gas with certain pressure into the driving device so that the gas in the furnace body can not enter the driving device.
After the structure is adopted, the annealing device can ensure that the air pressure in the driving motor is larger than the air pressure in the furnace body because the protective gas is conveyed into the driving motor, the air in the furnace body cannot enter the driving motor, and the protective gas can protect the motor from rusting.
The foregoing description is only an overview of the technical solutions of the present application, so that the technical means of the present application can be more clearly understood and the present application can be implemented according to the content of the description, and in order to make the above and other objects, features and advantages of the present application more clearly understood, the following detailed description is made with reference to the preferred embodiments of the present application and the accompanying drawings.
The above and other objects, advantages and features of the present application will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts. Throughout the drawings, like elements or portions are generally identified by like reference numerals.
FIG. 1 is a schematic view of the structure of an annealing apparatus of the present invention.
Fig. 2 is a perspective view of the annealing apparatus of the present invention.
Fig. 3 is a partially enlarged view of the motor of fig. 1.
Fig. 4 is a schematic view of another embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. In the following description, specific details such as specific configurations and components are provided only to help the embodiments of the present application be fully understood. Accordingly, it will be apparent to those skilled in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the present application. In addition, descriptions of well-known functions and constructions are omitted in the embodiments for clarity and conciseness.
It should be appreciated that reference throughout this specification to "one embodiment" or "the embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, the appearances of the phrase "one embodiment" or "the present embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
Further, the present application may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed.
The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, B exists alone, and A and B exist at the same time, and the term "/and" is used herein to describe another association object relationship, which means that two relationships may exist, for example, A/and B, may mean: a alone, and both a and B alone, and further, the character "/" in this document generally means that the former and latter associated objects are in an "or" relationship.
The term "at least one" herein is merely an association relationship describing an associated object, and means that there may be three relationships, for example, at least one of a and B, may mean: a exists alone, A and B exist simultaneously, and B exists alone.
It is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion.
As shown in fig. 1 to 4, the annealing device of the present invention comprises a furnace body 1 and a driving device, wherein the driving device is a motor 5, a shaft hole 2 is arranged on the furnace body, a rotating shaft 3 is arranged on the shaft hole 2, the rotating shaft 3 is connected with the motor 5 and a rotating device 4, and the motor 5 drives the rotating device 4 to rotate through the rotating shaft 3. The rotating device 4 is arranged in the furnace body, can rotate and is used for placing workpieces or installing a heating device. The motor 5 comprises a shell, a connecting port 6 is arranged on the shell, the connecting port 6 is connected with a protective gas conveying pipe 8, and the protective gas conveying pipe 8 is connected with a protective gas supply device.
Connect protection gas conveyer pipe 8, protection gas conveyer pipe 8 can be with the protection gas input of certain pressure to the motor 5 for the unable entering motor 5 of gas in the furnace body 1. As the protective gas is conveyed into the driving motor 5, the air pressure in the driving motor 5 is larger than the air pressure in the furnace body, the gas in the furnace body 1 can not enter the driving motor 5, and the protective gas can protect the motor from rusting. The shielding gas may be nitrogen, an inert gas, or dry air.
The furnace body comprises a furnace cover 11, and the shaft hole 2, the rotating shaft 3 and the motor 5 are arranged on the furnace cover 11. Due to the arrangement of the furnace cover 11, the furnace cover 11 can be conveniently disassembled and assembled, and the driving motor 5 arranged on the furnace cover 11 can also be conveniently disassembled and assembled.
As shown in fig. 3, the housing of the motor 5 includes a base 51 and a cylinder 52, the base 51 and the cylinder 52 are connected by bolts 53, and the shielding gas delivery pipe 8 is connected to the base 51. The shielding gas delivery tube 8 may also be attached to the cylinder 52, as shown in fig. 4.
Because the base 51 is arranged at the bottom of the cylinder 52, the base 51 can be conveniently disassembled and assembled through the disassembling and assembling bolt 53, the protective gas conveying pipe 8 can be conveniently installed or disassembled, and the maintenance is convenient.
As shown in fig. 3, a flange 54 is provided at a position where the shell is attached to the furnace body 1, and the shell and the furnace body 1 are attached via the flange 54. The flange 54 can make the installation of the motor shell and the furnace body 1 more compact and airtight, and can prevent the gas leakage in the furnace body and also prevent the protective gas leakage.
As shown in fig. 3, the motor 5 may further be connected to a cooling water inlet 12 and a cooling water outlet 13, and may further be connected to an isolated cooling water inlet 14 and an isolated cooling water outlet 15.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention in any way, so that any person skilled in the art can make changes or modifications to the equivalent embodiments using the above disclosure. Any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the scope of the present invention, unless they depart from the technical spirit of the present invention.
Claims (10)
1. An annealing apparatus comprises
-a furnace body;
-a rotating device rotatably arranged inside the furnace body;
-a rotating shaft connected to the rotating device for rotating the rotating device;
-a shaft hole arranged on the furnace body for mounting the rotating shaft;
the driving device is connected with the rotating shaft and drives the rotating shaft to rotate;
the method is characterized in that: the driving device is connected with the protective gas supply device, and the protective gas supply device can input protective gas with certain pressure into the driving device, so that the gas in the furnace body cannot enter the driving device.
2. The annealing device according to claim 1, wherein: the driving device comprises a shell, and the shell is connected with the shielding gas supply device.
3. The annealing device according to claim 1 or 2, wherein: the furnace body comprises a furnace cover, and the shaft hole, the rotating shaft and the driving device are arranged on the furnace cover.
4. The annealing device according to claim 3, wherein: the shell comprises a base and a barrel body, the base is connected with the barrel body through bolts, and the protective gas supply device is connected to the base or the barrel body.
5. The annealing device according to claim 3, wherein: the shell and the furnace body are arranged on the flange plate, and the shell and the furnace body are arranged through the flange plate.
6. The utility model provides an annealing device's drive arrangement, connection pivot, includes the shell, its characterized in that: the shell is connected with the protective gas supply device, and the protective gas supply device can input protective gas with certain pressure into the driving device, so that the gas in the furnace body cannot enter the driving device.
7. The driving apparatus of an annealing apparatus according to claim 7, wherein: the furnace body comprises a furnace cover, and the shaft hole, the rotating shaft and the driving device are arranged on the furnace cover.
8. The annealing device according to claim 6 or 7, wherein: the shell comprises a base and a barrel body, the base is connected with the barrel body through bolts, and the protective gas supply device is connected to the base or the barrel body.
9. The annealing device according to claim 6 or 7, wherein: the shell and the furnace body are arranged on the flange plate, and the shell and the furnace body are arranged through the flange plate.
10. A method for protecting a driving device of an annealing device, comprising: protective gas with certain pressure is input into the driving device, so that the gas in the furnace body cannot enter the driving device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111670832.0A CN114410897A (en) | 2021-12-31 | 2021-12-31 | Annealing device and driving device and protection method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111670832.0A CN114410897A (en) | 2021-12-31 | 2021-12-31 | Annealing device and driving device and protection method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114410897A true CN114410897A (en) | 2022-04-29 |
Family
ID=81270536
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111670832.0A Pending CN114410897A (en) | 2021-12-31 | 2021-12-31 | Annealing device and driving device and protection method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114410897A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4822182A (en) * | 1987-01-14 | 1989-04-18 | Canon Kabushiki Kaisha | Rotary motion driving apparatus |
| US6192603B1 (en) * | 1998-08-26 | 2001-02-27 | Sony Corporation | Vacuum processing apparatus and magnetic seal rotary bearing unit |
| CN105626928A (en) * | 2016-01-21 | 2016-06-01 | 四川海力智能科技股份有限公司 | Anti-failure method of intelligent meter motor valve |
| CN207227478U (en) * | 2017-09-02 | 2018-04-13 | 上海奉贤钢管厂有限公司 | A kind of annealing furnace for facilitating turning of work piece |
| CN209338615U (en) * | 2018-12-17 | 2019-09-03 | 大连中兴成信机械工程有限公司 | Gas distribution type heat treatment annealing furnace |
| CN211057158U (en) * | 2019-10-31 | 2020-07-21 | 成都兴锐新材料有限公司 | A kind of alloy steel casting annealing equipment |
-
2021
- 2021-12-31 CN CN202111670832.0A patent/CN114410897A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4822182A (en) * | 1987-01-14 | 1989-04-18 | Canon Kabushiki Kaisha | Rotary motion driving apparatus |
| US6192603B1 (en) * | 1998-08-26 | 2001-02-27 | Sony Corporation | Vacuum processing apparatus and magnetic seal rotary bearing unit |
| CN105626928A (en) * | 2016-01-21 | 2016-06-01 | 四川海力智能科技股份有限公司 | Anti-failure method of intelligent meter motor valve |
| CN207227478U (en) * | 2017-09-02 | 2018-04-13 | 上海奉贤钢管厂有限公司 | A kind of annealing furnace for facilitating turning of work piece |
| CN209338615U (en) * | 2018-12-17 | 2019-09-03 | 大连中兴成信机械工程有限公司 | Gas distribution type heat treatment annealing furnace |
| CN211057158U (en) * | 2019-10-31 | 2020-07-21 | 成都兴锐新材料有限公司 | A kind of alloy steel casting annealing equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111037025B (en) | Brazing furnace transmission nitrogen protection device | |
| US4775294A (en) | Tubular centrifugal fan | |
| CN104651568A (en) | High-precision atmosphere protection programmed tempering furnace | |
| CN114410897A (en) | Annealing device and driving device and protection method thereof | |
| CN212833924U (en) | Well type annealing furnace with good sealing performance | |
| CN207043740U (en) | Voltage regulation batch meter machining production line | |
| CN214168084U (en) | A zinc-aluminum vacuum distillation and separation device | |
| CN215028286U (en) | Flue gas treatment pulping tank of multi-channel regulating valve | |
| CN217797968U (en) | Dust hood | |
| CN217351440U (en) | Spheroidizing annealing furnace for steel wires | |
| CN211503651U (en) | Catalytic degreasing furnace with atmosphere purification function | |
| CN215713315U (en) | Gas carburizing device for titanium seal head processing | |
| CN222296567U (en) | High-pressure centrifugal fan | |
| CN221032835U (en) | From generating set of taking protection | |
| CN221630363U (en) | Metal vacuum smelting reduction furnace | |
| CN201206631Y (en) | Gas sealing device | |
| CN204140466U (en) | The anticorrosion air bells exhauster of air inducing type | |
| CN217324174U (en) | Large horizontal high-pressure gas quenching furnace | |
| CN222231282U (en) | Furnace body structure of oxalic acid catalytic degreasing continuous furnace | |
| CN223103020U (en) | A stirring device for ultra-pure stainless steel smelting furnace | |
| CN214764246U (en) | But remote control's novel dust collecting equipment | |
| CN221973868U (en) | A pressure fan for smelting silicon-manganese alloy | |
| CN222881689U (en) | Electrode cooling device for submerged arc furnace | |
| CN221246915U (en) | Energy-saving casting heat dissipation and smoke exhaust device | |
| CN222460284U (en) | A calcining furnace pressure maintaining device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20220429 |
|
| WD01 | Invention patent application deemed withdrawn after publication |