CN112806983A - High-strength glass fiber reinforced plastic nuclear magnetic resonance bed board and extrusion-drawing process thereof - Google Patents
High-strength glass fiber reinforced plastic nuclear magnetic resonance bed board and extrusion-drawing process thereof Download PDFInfo
- Publication number
- CN112806983A CN112806983A CN202110038034.XA CN202110038034A CN112806983A CN 112806983 A CN112806983 A CN 112806983A CN 202110038034 A CN202110038034 A CN 202110038034A CN 112806983 A CN112806983 A CN 112806983A
- Authority
- CN
- China
- Prior art keywords
- magnetic resonance
- nuclear magnetic
- plate
- board
- connecting plate
- 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
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
The invention relates to the technical field of medical equipment, and discloses a high-strength glass fiber reinforced plastic nuclear magnetic resonance bed board, wherein two fixed blocks are fixedly arranged on the bottom surface of a nuclear magnetic resonance board, connecting plates are arranged on two sides of the nuclear magnetic resonance board, two side plates are fixedly arranged on the bottom surface of the connecting plates, the mechanical property of the bed board can be ensured by arranging the nuclear magnetic resonance board, the fixed blocks, the connecting plates, the side plates and a top block in an optimized layering design, and the bed board has good processability, because the raw materials of the nuclear magnetic resonance board, the fixed blocks, the connecting plates, the side plates and the top block are glass fiber multi-axial cloth and a small amount of roving, the production cost is further reduced, the yarn content of the device can reach 60 percent by a pultrusion process, sufficient strength is provided, the device is convenient to be used in later period, and has little influence on the whole structure of the bed, the later stage of being convenient for is assembled, can make things convenient for the staff to carry out the installation of spout through the fixed block that sets up.
Description
Technical Field
The invention relates to the technical field of medical equipment, in particular to a high-strength glass fiber reinforced plastic nuclear magnetic resonance bed board and pultrusion thereof.
Background
With the rapid development of modern medical technology, computed tomography is more and more widely applied to clinical diagnosis, and a scanner supporting bed plate is mostly made of composite materials, and has the characteristics of light weight, high strength, no magnetism and good electromagnetic transmission, and the bed plate structure is in a popular scheme that a carbon fiber skin and PMI foam sandwich structure is adopted and vacuum introduction or compression molding is adopted.
The existing bed boards are all formed by compression molding, the bed boards are easily damaged in the process of die pressing, the bed boards cannot be used in the later period, the production cost is increased, if the bed boards are subjected to die pressing, the forming efficiency is low, the bed boards are not suitable for batch production, and in order to solve the problems, the high-strength glass fiber reinforced plastic nuclear magnetic resonance bed boards are provided.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides the high-strength glass fiber reinforced plastic nuclear magnetic resonance bed board which has the advantages of pultrusion process forming, production cost reduction, high forming efficiency, suitability for batch production and the like, and solves the problems that the existing bed boards are all molded by compression, the bed boards are easy to damage in the molding process, the bed boards cannot be used in the later period, the production cost is increased, and the molding efficiency is low and the bed boards are not suitable for batch production if the bed boards are molded.
(II) technical scheme
In order to achieve the purpose, the invention provides the following technical scheme: high strength glass steel nuclear magnetic resonance bed board, including the nuclear magnetic resonance board, the nuclear magnetic resonance board is not being repeated here for having the structure, the bottom surface fixed mounting of nuclear magnetic resonance board has two fixed blocks, the fixed block is the L shape piece, the both sides of nuclear magnetic resonance board all are provided with the connecting plate, the connecting plate is the rectangle structure, the bottom surface fixed mounting of connecting plate has two curb plates, the curb plate is the rectangle structure, the curb plate that is located the both sides of nuclear magnetic resonance board is in the same place with nuclear magnetic resonance board fixed mounting, the top surface fixed mounting of connecting plate has the kicking block, the kicking block is the V-arrangement piece, the draw-in groove has been seted up to one side of kicking.
The invention is further configured to: and yarns are arranged inside the fixing blocks.
The invention is further configured to: yarns are arranged inside the side plates.
The invention is further configured to: and yarns are arranged in the jacking blocks.
The invention is further configured to: and a felt is arranged inside the nuclear magnetic resonance plate.
In order to overcome the defects of the prior art, the invention also provides a pultrusion method of the high-strength glass fiber reinforced plastic nuclear magnetic resonance bed plate, which comprises the following specific steps:
s1: preparing raw materials of a nuclear magnetic resonance plate, a fixed block, a connecting plate, a side plate and a top block, wherein the raw materials adopt glass fiber multi-axial cloth and a small amount of roving, and the nuclear magnetic resonance plate, the fixed block, the connecting plate, the side plate and the top block are laid into layers in sequence to achieve the first step of laying;
s2: starting the heating equipment, enabling the nuclear magnetic resonance plate, the fixed block, the connecting plate, the side plate and the top block to be more easily elongated or contracted by the high temperature generated by the heating equipment, and then enabling the nuclear magnetic resonance plate, the fixed block, the connecting plate, the side plate and the top block to be elongated or extruded by pultrusion equipment to form the nuclear magnetic resonance plate, the fixed block, the connecting plate, the side plate and the top block, so as to achieve the second step of pultrusion;
s3: starting a laser cutting machine, irradiating the plate by utilizing a high-power-density laser beam focused by the laser cutting machine, rapidly raising the temperature of the nuclear magnetic resonance plate, the fixed block, the connecting plate, the side plate and the top block by utilizing the action of light and substances, melting and gasifying, blowing off slag by virtue of compressed gas to form a cutting mode of cutting a joint, and achieving the third step of cutting a blank;
s4: processing blanks of the nuclear magnetic resonance board, the fixed block, the connecting board, the side board and the top block in a polishing mode, so that some cutting surfaces of the blanks are smoother, and the fourth step of processing is achieved;
s5: punching the nuclear magnetic resonance plate, the fixed block, the connecting plate, the side plate and the top block by using punching equipment, assembling the nuclear magnetic resonance plate, the fixed block, the connecting plate, the side plate and the top block by using tools such as screws and the like, debugging and checking to obtain qualified products, and achieving the fifth step of assembly;
s6: spraying paint on the surface of the assembled nuclear magnetic resonance plate by using paint spraying equipment, and treating burrs on the assembled surface by using a grinding wheel to achieve the surface treatment of the sixth step;
s7: removing dust on the surface of the assembled nuclear magnetic resonance plate by using a dust removal device, and integrally packaging the assembled nuclear magnetic resonance plate by using a packaging device to achieve the seventh step of cleaning and packaging;
s8: and (5) transporting the packaged and assembled nuclear magnetic resonance panels to a warehouse by using transport equipment for storage, and warehousing in the eighth step.
(III) advantageous effects
Compared with the prior art, the invention provides the high-strength glass fiber reinforced plastic nuclear magnetic resonance bed board, which has the following beneficial effects:
1. the high-strength glass fiber reinforced plastic nuclear magnetic resonance bed board can ensure the mechanical property of the bed board and has good processability at the same time through the optimized layering design of the nuclear magnetic resonance board, the fixed block, the connecting plate, the side plate and the top block, because the raw materials of the nuclear magnetic resonance plate, the fixed block, the connecting plate, the side plate and the top block are all glass fiber multi-axial cloth and a small amount of roving, the production cost is further reduced, the yarn content of the device can reach 60 percent through a pultrusion process, sufficient strength is provided, the device is convenient to use in the later period, because the influence on the whole structure of the bed plate is very small after the local hole opening and the grooving of the device are processed, the device is convenient for later assembly, the installation of spout can conveniently be carried out through the fixed block that sets up, the curb plate through setting up is convenient for carry on the installation of gyro wheel, is convenient for advance through the draw-in groove that sets up and detains the installation of area, makes the production of device more convenient.
Drawings
FIG. 1 is a schematic diagram of a NMR plate structure according to the invention;
FIG. 2 is a schematic plan view of the present invention;
FIG. 3 is a schematic process flow of the present invention.
In the figure: 1. a nuclear magnetic resonance plate; 2. a fixed block; 3. a connecting plate; 4. a side plate; 5. a top block; 6. a clamping groove.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.
As described in the background of the invention, the prior art has disadvantages, and in order to solve the above technical problems, the present application proposes a high strength glass fiber reinforced plastic nuclear magnetic resonance bed plate.
Example 1
In a typical embodiment of this application, as shown in fig. 1-3, high strength glass steel nuclear magnetic resonance bed board, including nuclear magnetic resonance board 1, nuclear magnetic resonance board 1 does not do the repeated description here for having the structure, nuclear magnetic resonance board 1's bottom surface fixed mounting has two fixed blocks 2, fixed block 2 is the L shape piece, nuclear magnetic resonance board 1's both sides all are provided with connecting plate 3, connecting plate 3 is the rectangle structure, connecting plate 3's bottom surface fixed mounting has two curb plates 4, curb plate 4 is the rectangle structure, the curb plate 4 that is located nuclear magnetic resonance board 1's both sides is in the same place with nuclear magnetic resonance board 1 fixed mounting, connecting plate 3's top surface fixed mounting has kicking block 5, kicking block 5 is the V-shaped piece, draw-in groove 6 has been seted up to one side of kicking block 5, draw-in groove 6 is the rectangular. Preferably, the present invention is provided with yarns 7 inside the fixed block 2, inside the side plate 4, and inside the top block 5.
The invention is further configured to: a felt 8 is provided inside the nuclear magnetic resonance panel 1.
The installation of spout can conveniently be carried out through the fixed block 2 that sets up, the installation of gyro wheel is convenient for carry out through the curb plate 4 that sets up, is convenient for advance through the draw-in groove 6 that sets up and detains the installation of area.
Example 2
In order to overcome the defects of the prior art, the invention also provides a pultrusion method of the high-strength glass fiber reinforced plastic nuclear magnetic resonance bed plate, which comprises the following specific steps:
s1: preparing raw materials of a nuclear magnetic resonance board 1, a fixed block 2, a connecting board 3, a side board 4 and a top block 5, wherein the raw materials adopt glass fiber multi-axial cloth and a small amount of roving, and paving the raw materials 1, 2, 3, 4 and 5 into layers in sequence to achieve the first-step paving;
s2: starting the heating equipment, enabling the nuclear magnetic resonance plate 1, the fixed block 2, the connecting plate 3, the side plate 4 and the top block 5 to be more easily elongated or contracted by the high temperature generated by the heating equipment, and then utilizing pultrusion equipment to elongate or extrude the nuclear magnetic resonance plate 1, the fixed block 2, the connecting plate 3, the side plate 4 and the top block 5 to form the nuclear magnetic resonance plate 1, the fixed block 2, the connecting plate 3, the side plate 4 and the top block 5 so as to achieve the second step of pultrusion;
s3: starting a laser cutting machine, irradiating the plate by utilizing a high-power-density laser beam focused by the laser cutting machine, rapidly raising the temperature of the nuclear magnetic resonance plate 1, the fixed block 2, the connecting plate 3, the side plate 4 and the top block 5 by utilizing the action of light and substances, melting and gasifying, blowing off slag by virtue of compressed gas to form a cutting mode of cutting a seam, and achieving the third step of cutting a blank;
s4: processing blanks of the nuclear magnetic resonance board 1, the fixed block 2, the connecting board 3, the side board 4 and the top block 5 in a polishing mode, so that some cutting surfaces of the blanks are smoother, and the fourth step of processing is achieved;
s5: punching the nuclear magnetic resonance plate 1, the fixed block 2, the connecting plate 3, the side plate 4 and the top block 5 by using punching equipment, assembling the nuclear magnetic resonance plate 1, the fixed block 2, the connecting plate 3, the side plate 4 and the top block 5 by using tools such as screws and the like, debugging and checking to obtain qualified products, and achieving the fifth step of assembly;
s6: spraying paint on the surface of the assembled nuclear magnetic resonance panel 1 by using paint spraying equipment, and treating burrs on the surface of the assembled nuclear magnetic resonance panel 1 by using a grinding wheel to achieve the surface treatment of the sixth step;
s7: removing dust on the surface of the assembled nuclear magnetic resonance plate 1 through a dust removal device, and integrally packaging the assembled nuclear magnetic resonance plate 1 by using a packaging device to achieve the seventh step of cleaning and packaging;
s8: and (5) transporting the packaged and assembled nuclear magnetic resonance panels 1 to a warehouse by using transport equipment for storage, and warehousing in the eighth step.
When in use, the nuclear magnetic resonance board 1, the fixed block 2, the connecting plate 3, the side plate 4 and the top block 5 are arranged to optimize the layering design, so that the mechanical performance of the bed board can be ensured, and the bed board has good processability, because the raw materials of the nuclear magnetic resonance board 1, the fixed block 2, the connecting plate 3, the side plate 4 and the top block 5 are glass fiber multi-axial cloth and a small amount of roving, the production cost is further reduced, the yarn content of the device can reach 60 percent of the clamping groove by a pultrusion process, so that enough strength is provided, the device is convenient to use in later period, the influence on the whole structure of the bed board is small after the device is processed by locally opening and slotting, the later-period assembly is convenient, the installation of the sliding groove can be conveniently carried out by the arranged fixed block 2, the installation of the roller is convenient to carry out by the arranged side plate 4, and the installation of the, the production of the device is more convenient.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. High strength glass steel nuclear magnetic resonance bed board, including nuclear magnetic resonance board (1), its characterized in that: the utility model discloses a nuclear magnetic resonance imaging device, including nuclear magnetic resonance board (1), the bottom surface fixed mounting of nuclear magnetic resonance board (1) has two fixed blocks (2), the both sides of nuclear magnetic resonance board (1) all are provided with connecting plate (3), the bottom surface fixed mounting of connecting plate (3) has two curb plates (4), curb plate (4) that are located the both sides of nuclear magnetic resonance board (1) are in the same place with nuclear magnetic resonance board (1) fixed mounting, and the top surface fixed mounting of connecting plate (3) has kicking block (5), draw-in groove (6) have been seted up to one side of kicking.
2. The high-strength glass fiber reinforced plastic nuclear magnetic resonance bed board as claimed in claim 1, wherein: and yarns (7) are arranged in the fixed block (2).
3. The high-strength glass fiber reinforced plastic nuclear magnetic resonance bed board as claimed in claim 1, wherein: yarns (7) are arranged inside the side plates (4).
4. The high-strength glass fiber reinforced plastic nuclear magnetic resonance bed board as claimed in claim 1, wherein: and yarns (7) are arranged in the top block (5).
5. The high-strength glass fiber reinforced plastic nuclear magnetic resonance bed board as claimed in claim 1, wherein: and a felt (8) is arranged inside the nuclear magnetic resonance plate (1).
6. The pultrusion method of the high-strength glass fiber reinforced plastic nuclear magnetic resonance bed board as claimed in claim 1, is characterized by comprising the following specific steps:
s1: preparing a material;
s2: starting heating equipment, enabling the nuclear magnetic resonance plate (1), the fixed block (2), the connecting plate (3), the side plate (4) and the top block (5) to be more easily elongated or contracted by the aid of high temperature generated by the heating equipment, and then enabling the nuclear magnetic resonance plate (1), the fixed block (2), the connecting plate (3), the side plate (4) and the top block (5) to be elongated or extruded by the aid of pultrusion equipment to form the nuclear magnetic resonance plate (1), the fixed block (2), the connecting plate (3), the side plate (4) and the top block (5), so that second-step pultrusion is achieved;
s3: starting a laser cutting machine, irradiating the plate by utilizing a laser beam with high power density focused by the laser cutting machine, rapidly raising the temperature of the nuclear magnetic resonance plate (1), the fixed block (2), the connecting plate (3), the side plate (4) and the top block (5) by utilizing the action of light and substances, melting and gasifying, blowing off slag by virtue of compressed gas to form a cutting mode of cutting a joint, and achieving the third step of cutting a blank;
s4: processing blanks of the nuclear magnetic resonance board (1), the fixed block (2), the connecting plate (3), the side plate (4) and the top block (5) in a polishing mode, so that some cutting surfaces of the blanks are smoother, and the fourth step of processing is achieved;
s5: punching holes in the nuclear magnetic resonance plate (1), the fixed block (2), the connecting plate (3), the side plate (4) and the top block (5) by using punching equipment, assembling the nuclear magnetic resonance plate (1), the fixed block (2), the connecting plate (3), the side plate (4) and the top block (5) by using tools such as screws and the like, and debugging and checking to obtain qualified products, so that the fifth step of assembly is realized;
s6: spraying paint on the surface of the assembled nuclear magnetic resonance panel (1) by using paint spraying equipment, and treating burrs on the surface of the assembled nuclear magnetic resonance panel (1) by using a grinding wheel to achieve the surface treatment of the sixth step;
s7: removing dust on the surface of the assembled nuclear magnetic resonance plate (1) through a dust removal device, and integrally packaging the assembled nuclear magnetic resonance plate (1) by using a packaging device to achieve the seventh step of cleaning and packaging;
s8: and (4) transporting the packaged and assembled nuclear magnetic resonance plates (1) to a warehouse by using transport equipment for storage, and warehousing in the eighth step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110038034.XA CN112806983A (en) | 2021-01-12 | 2021-01-12 | High-strength glass fiber reinforced plastic nuclear magnetic resonance bed board and extrusion-drawing process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110038034.XA CN112806983A (en) | 2021-01-12 | 2021-01-12 | High-strength glass fiber reinforced plastic nuclear magnetic resonance bed board and extrusion-drawing process thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112806983A true CN112806983A (en) | 2021-05-18 |
Family
ID=75868830
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110038034.XA Pending CN112806983A (en) | 2021-01-12 | 2021-01-12 | High-strength glass fiber reinforced plastic nuclear magnetic resonance bed board and extrusion-drawing process thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112806983A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4504991A (en) * | 1982-06-07 | 1985-03-19 | Sealy, Incorporated | Fire-resistant mattress and high strength fire-retardant composite |
| CN101897586A (en) * | 2008-11-06 | 2010-12-01 | 株式会社东芝 | MRI apparatus, bed device for MRI apparatus and table top of bed device for MRI apparatus |
| CN203710018U (en) * | 2014-01-16 | 2014-07-16 | 陆春生 | Universal nuclear magnetic resonance sickbed structure |
| CN206198194U (en) * | 2016-07-29 | 2017-05-31 | 上海谷昱信息技术有限公司 | A kind of composite medical bed for intelligent medical |
| CN107582056A (en) * | 2016-07-07 | 2018-01-16 | 上海西门子医疗器械有限公司 | The manufacture method of the bed board and diagnostic couch of correlation, Medical Devices and bed board |
| CN109572000A (en) * | 2018-12-10 | 2019-04-05 | 江苏创曦复合材料科技有限公司 | A kind of production method of DR medical treatment bed board |
| CN111820897A (en) * | 2019-04-18 | 2020-10-27 | 山东省医学影像学研究所 | Be used for nuclear magnetic resonance medical diagnosis auxiliary assembly |
-
2021
- 2021-01-12 CN CN202110038034.XA patent/CN112806983A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4504991A (en) * | 1982-06-07 | 1985-03-19 | Sealy, Incorporated | Fire-resistant mattress and high strength fire-retardant composite |
| CN101897586A (en) * | 2008-11-06 | 2010-12-01 | 株式会社东芝 | MRI apparatus, bed device for MRI apparatus and table top of bed device for MRI apparatus |
| CN203710018U (en) * | 2014-01-16 | 2014-07-16 | 陆春生 | Universal nuclear magnetic resonance sickbed structure |
| CN107582056A (en) * | 2016-07-07 | 2018-01-16 | 上海西门子医疗器械有限公司 | The manufacture method of the bed board and diagnostic couch of correlation, Medical Devices and bed board |
| CN206198194U (en) * | 2016-07-29 | 2017-05-31 | 上海谷昱信息技术有限公司 | A kind of composite medical bed for intelligent medical |
| CN109572000A (en) * | 2018-12-10 | 2019-04-05 | 江苏创曦复合材料科技有限公司 | A kind of production method of DR medical treatment bed board |
| CN111820897A (en) * | 2019-04-18 | 2020-10-27 | 山东省医学影像学研究所 | Be used for nuclear magnetic resonance medical diagnosis auxiliary assembly |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112454938A (en) | Forming method of carbon fiber honeycomb sandwich composite material member | |
| US20230364875A1 (en) | Modular wind turbine blade and manufacturing method thereof | |
| CN103552256A (en) | Autoclave integrated-forming method for composite double-surface-ribbed wallboard | |
| CN110103488B (en) | Continuous die pressing manufacturing process of fan blade thermoplastic composite material beam cap | |
| CN112806983A (en) | High-strength glass fiber reinforced plastic nuclear magnetic resonance bed board and extrusion-drawing process thereof | |
| CN109360919A (en) | A kind of full composite material battery case of new-energy automobile and preparation method thereof | |
| CN106626702B (en) | A kind of production method of car composite structure car body panel | |
| CN114683579A (en) | Carbon fiber product embedded pipe body forming structure and forming method | |
| CN209738315U (en) | Modular-design composite material mold | |
| CN117341233A (en) | Multi-cavity carbon fiber composite material beam and preparation method thereof | |
| CN116767293A (en) | Composite light railway carriage side wall and manufacturing process thereof | |
| CN209491886U (en) | A kind of EER magnetic ferrite magnetic core mold | |
| EP2578351A1 (en) | Driver's cab of magnetically levitated train and manufacturing method thereof | |
| CN206154811U (en) | Novel compound panel | |
| CN205220812U (en) | Lid behind compound cellular board structure glass sheetmetal card | |
| CN109572000B (en) | Method for manufacturing DR medical bed board | |
| CN2272021Y (en) | Continuous glass fibre filament punched felt | |
| CN207243743U (en) | A kind of automotive glass surface scratch prosthetic device | |
| CN216267724U (en) | Pressing device for glass fiber reinforced plastic plate production | |
| CN211330036U (en) | Production of high molecular weight polyethylene UD cloth is with single-roll gumming system | |
| CN107718422A (en) | A kind of two-way electric hydraulic cutting presser for being easy to discharging | |
| CN215749820U (en) | Novel single-bin prefabricated box culvert vertical die | |
| CN106273525B (en) | A kind of polyurethane screen moulding process | |
| CN217319387U (en) | Compression molding equipment for preparing glass fiber reinforced plastic | |
| CN216683433U (en) | Automatic production line |
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: 20210518 |
|
| WD01 | Invention patent application deemed withdrawn after publication |