CN209696684U - A kind of ammonium paratungstate production spray column that acidic catalyst effect is good - Google Patents
A kind of ammonium paratungstate production spray column that acidic catalyst effect is good Download PDFInfo
- Publication number
- CN209696684U CN209696684U CN201821722561.2U CN201821722561U CN209696684U CN 209696684 U CN209696684 U CN 209696684U CN 201821722561 U CN201821722561 U CN 201821722561U CN 209696684 U CN209696684 U CN 209696684U
- Authority
- CN
- China
- Prior art keywords
- tower body
- gear
- fixedly connected
- acidic catalyst
- ammonium paratungstate
- 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.)
- Expired - Fee Related
Links
- 239000007921 spray Substances 0.000 title claims abstract description 54
- 239000003054 catalyst Substances 0.000 title claims abstract description 42
- 230000002378 acidificating effect Effects 0.000 title claims abstract description 25
- XAYGUHUYDMLJJV-UHFFFAOYSA-Z decaazanium;dioxido(dioxo)tungsten;hydron;trioxotungsten Chemical compound [H+].[H+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.[O-][W]([O-])(=O)=O.[O-][W]([O-])(=O)=O.[O-][W]([O-])(=O)=O.[O-][W]([O-])(=O)=O.[O-][W]([O-])(=O)=O.[O-][W]([O-])(=O)=O XAYGUHUYDMLJJV-UHFFFAOYSA-Z 0.000 title claims abstract description 23
- 230000000694 effects Effects 0.000 title claims abstract description 23
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 23
- 230000005540 biological transmission Effects 0.000 claims abstract description 36
- 230000007246 mechanism Effects 0.000 claims abstract description 20
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 21
- 241000883990 Flabellum Species 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 239000003814 drug Substances 0.000 claims description 10
- 239000007789 gas Substances 0.000 description 28
- 238000006555 catalytic reaction Methods 0.000 description 9
- 238000005507 spraying Methods 0.000 description 8
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical group [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 229910052721 tungsten Inorganic materials 0.000 description 3
- 239000010937 tungsten Substances 0.000 description 3
- 230000003197 catalytic effect Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- 238000003915 air pollution Methods 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008450 motivation Effects 0.000 description 1
Landscapes
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The utility model discloses a kind of ammonium paratungstate production spray columns that acidic catalyst effect is good, including tower body, air inlet pipe is communicated on the left of the tower body bottom, right side at the top of the tower body is communicated with exhaust pipe, right side at the top of the tower body inner wall is fixedly connected with wave-shape board, right side at the top of the tower body is communicated with sparge pipe, and the bottom end of the sparge pipe is through tower body and extends to the inside of tower body and is communicated with fog-spray nozzle, and the bottom end of the sparge pipe is provided with assisted rotating mechanism.The utility model is used cooperatively by setting tower body, air inlet pipe, exhaust pipe, wave-shape board, sparge pipe, fog-spray nozzle, assisted rotating mechanism, fixed frame, transmission mechanism and spoiler, solve the problems, such as that existing ammonium paratungstate production spray column acidic catalyst is ineffective, the good ammonium paratungstate production spray column of the acidic catalyst effect, have the good advantage of acidic catalyst effect, prevents exhaust emission air.
Description
Technical field
The utility model relates to ammonium paratungstate production equipment technical field, specially a kind of secondary tungsten that acidic catalyst effect is good
Spray column is used in sour ammonium production.
Background technique
Ammonium paratungstate (APT) is the important intermediate compound for producing tungsten powder, tungsten wire, tungsten-bast alloy and all tungsten materials, and
Large exporting in China.Acid waste gas can be generated during production ammonium paratungstate, exhaust gas can generate air environment
Pollution.
The exhaust gas that ammonium paratungstate is generated in production needs to carry out it by spray column catalysis and removes acid, but existing secondary tungsten
Sour ammonium production is ineffective with spray column acidic catalyst, and the exhaust gas of discharge is caused still to contain more acidity, wherein catalysis effect
Fruit, which is not enough to carry out it to be preferably catalyzed, makes its air born pollution.
Utility model content
The purpose of this utility model is to provide a kind of ammonium paratungstate production spray columns that acidic catalyst effect is good, have
The good advantage of acidic catalyst effect solves the problems, such as that existing ammonium paratungstate production spray column acidic catalyst is ineffective.
To achieve the above object, the utility model provides the following technical solutions: a kind of para-tungstic acid that acidic catalyst effect is good
Ammonium, which produces, uses spray column, including tower body, is communicated with air inlet pipe on the left of the tower body bottom, the right side connection at the top of the tower body
There is exhaust pipe, the right side at the top of the tower body inner wall is fixedly connected with wave-shape board, and the right side at the top of the tower body is communicated with water spray
Pipe, the bottom end of the sparge pipe is through tower body and extends to the inside of tower body and is communicated with fog-spray nozzle, and the bottom end of the sparge pipe is set
It is equipped with assisted rotating mechanism, the left side at the top of the tower body is fixedly connected with fixed frame, and the fixed frame is internally provided with biography
The left and right side of motivation structure, the tower body inner wall bottom is fixedly connected to spoiler.
Preferably, the bottom of the spoiler is provided with sponge plate, the inside of the sponge plate immersed with exhaust gas catalyst,
The surface of the wave-shape board is coated with exhaust gas catalyst, and the medicament that the fog-spray nozzle sprays is the proportion of sodium hydroxide and water, matches
The ratio of ratio is 1:15~20.
Preferably, the transmission mechanism, including motor, the output shaft of the motor are fixedly connected with transmission shaft, the biography
The bottom on moving axis surface is socketed with flabellum, is socketed with first gear at the top of the transmission shaft surface.
Preferably, the assisted rotating mechanism includes second gear, and the second gear is socketed in the bottom of water spray pipe surface
Portion is fixedly connected with shaft at the top of the tower body inner wall, and the bottom on the shaft surface is arranged with anti-fall off block, the shaft
Surface be arranged with third gear, the first gear and second gear are engaged with third gear.
Preferably, the sparge pipe is flexibly connected with fog-spray nozzle by union, left side and the right side at the top of the wave-shape board
Side is fixedly connected to filter plate, and the surface of the filter plate is coated with exhaust gas catalyst, and the surface of the shaft is fixedly connected with
Stop collar on the upside of third gear.
Preferably, the top on the left of the tower body inner wall is fixedly connected with the first limit plate, inside first limit plate
Right side and the surface activity of transmission shaft connect, the right side at the top of the tower body inner wall is fixedly connected with position-limited rack, the limit
Bottom on the left of frame is fixedly connected with the second limit plate, and second limit plate is flexibly connected with the bottom of water spray pipe surface.
Compared with prior art, the beneficial effects of the utility model are as follows:
1, the utility model passes through setting tower body, air inlet pipe, exhaust pipe, wave-shape board, sparge pipe, fog-spray nozzle, auxiliary rotation
Mechanism, fixed frame, transmission mechanism and spoiler are used cooperatively, and are solved existing ammonium paratungstate production and are urged with spray column acidity
Change ineffective problem, it is good to have acidic catalyst effect for the good ammonium paratungstate production spray column of the acidic catalyst effect
Advantage prevents exhaust emission air.
2, the utility model is provided with sponge plate because of the bottom of spoiler, the inside of sponge plate immersed with exhaust gas catalyst,
The surface of wave-shape board is coated with exhaust gas catalyst, and the medicament that fog-spray nozzle sprays is the proportion of sodium hydroxide and water, the ratio of proportion
Are as follows: 1:15~20, the design make exhaust gas pass through the sponge plate progress air acidity for impregnating catalyst by the setting of sponge plate
Catalysis, while wave-shape board can make exhaust gas further contact catalysis with catalyst, while have the medicament of ejection to have by spraying
Sodium hydroxide can dissolve the acidity etc. in exhaust gas by its hygroscopy.
3, for the utility model because of transmission mechanism, including motor, the output shaft of motor is fixedly connected with transmission shaft, transmission shaft table
The bottom in face is socketed with flabellum, and transmission shaft is socketed with first gear at the top of surface, which passes through motor, transmission shaft, flabellum
With the setting of first gear, motor is set to drive transmission shaft and flabellum to pass by output shaft by starting motor convenient for user
It is dynamic, while first gear can be made to carry out rotation convenient for driving third gear and second gear to be rotated, flabellum rotation can make
Exhaust gas is significantly more efficient to be contacted with the surface of wave-shape board, to accelerate catalytic effect, then is made by the wavy design of wave-shape board
Its contact surface is wider, and catalysis range increases, and being sprayed for medicament for matching keeps its catalysis more thorough.
4, for the utility model because assisted rotating mechanism includes second gear, second gear is socketed in the bottom of water spray pipe surface
Portion is fixedly connected with shaft at the top of tower body inner wall, and the bottom on shaft surface is arranged with anti-fall off block, and the surface of shaft is arranged with
Third gear, first gear and second gear are engaged with third gear, which passes through the second tooth shaft, anti-fall off block and the
The setting of three gears enables its fog-spray nozzle to rotate by first gear and second gear and first gear is driven to be rotated, together
When second gear drive water pipe and fog-spray nozzle to carry out rotating spraying, so that fog-spray nozzle be made to be rotated while spraying.
5, the utility model is flexibly connected with fog-spray nozzle because of sparge pipe by union, the left and right side at the top of wave-shape board
It is fixedly connected to filter plate, the surface of filter plate is coated with exhaust gas catalyst, and the surface of shaft is fixedly connected with positioned at third tooth
The stop collar of upside is taken turns, which passes through the setting of union, filter plate and stop collar, make to revolve by union convenient for user
It is not influenced when turning by spraying, while filter plate is filtered its exhaust gas when leading at exhaust pipe, and exhaust gas is allowed to contact with filter plate
It is catalyzed it again while carrying out air filtration, and stop collar can prevent the bounce dislocation of third gear, improve
The gear-driven stability of third.
6, the utility model is fixedly connected with the first limit plate because of the top on the left of tower body inner wall, inside the first limit plate
The surface activity of right side and transmission shaft connects, and the right side at the top of tower body inner wall is fixedly connected with position-limited rack, the bottom on the left of position-limited rack
Portion is fixedly connected with the second limit plate, and the second limit plate is flexibly connected with the bottom of water spray pipe surface, which passes through the first limit
The setting of position plate, position-limited rack and the second limit plate, limits transmission shaft convenient for the first limit plate, prevents transmission shaft from rotating
When shake, keep its transmission more stable, while the second limit plate limits sparge pipe, makes sparge pipe by second gear band
Bounce can be reduced when dynamic rotation, anti-antipriming pipe fracture improves its stability in use.
Detailed description of the invention
FIG. 1 is a schematic structural view of the utility model；
Fig. 2 is the top cross-sectional view of the utility model Fig. 1；
Fig. 3 is the top view of the utility model third gear；
Fig. 4 is the enlarged drawing of the utility model A.
In figure: 1 tower body, 2 air inlet pipe, 3 exhaust pipes, 4 wave-shape boards, 5 sparge pipes, 6 fog-spray nozzles, 7 assisted rotating mechanisms, 71
Two gears, 72 shafts, 73 anti-fall off block, 74 third gears, 8 fixed frames, 9 transmission mechanisms, 91 motors, 92 transmission shafts, 93 flabellums,
94 first gears, 10 spoilers, 11 sponge plates, 12 unions, 13 filter plates, 14 stop collars, 15 position-limited racks, 16 first limits
Plate, 17 second limit plates.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
Fig. 1-4, a kind of ammonium paratungstate production spray column that acidic catalyst effect is good, including tower body 1 are please referred to, because of tower body
Top on the left of 1 inner wall is fixedly connected with the first limit plate 16, the surface on the right side inside the first limit plate 16 and transmission shaft 92
It is flexibly connected, the right side at the top of 1 inner wall of tower body is fixedly connected with position-limited rack 15, and the bottom in 15 left side of position-limited rack is fixedly connected with the
Two limit plates 17, the second limit plate 17 are flexibly connected with the bottom on 5 surface of sparge pipe, which passes through the first limit plate 16, limit
The setting of position frame 15 and the second limit plate 17, limits transmission shaft 92 convenient for the first limit plate 16, prevents transmission shaft 92 from existing
It is shaken when rotation, keeps its transmission more stable, while the second limit plate 17 limits sparge pipe 5, make sparge pipe 5 by
Two gears 71 can reduce bounce when driving rotation, anti-antipriming pipe fracture improves its stability in use, the left side of 1 bottom of tower body
It is communicated with air inlet pipe 2, the right side at 1 top of tower body is communicated with exhaust pipe 3, and the right side at the top of 1 inner wall of tower body is fixedly connected with wave
The right side of plate 4,1 top of tower body is communicated with sparge pipe 5, because sparge pipe 5 is flexibly connected with fog-spray nozzle 6 by union 12, wave
The left and right side at 4 top of plate is fixedly connected to filter plate 13, and the surface of filter plate 13 is coated with exhaust gas catalyst, shaft 72
Surface is fixedly connected with the stop collar 14 positioned at 74 upside of third gear, which passes through union 12, filter plate 13 and limit
The setting of ring 14 makes not influencing by spraying when rotation convenient for user by union 12, while filter plate 13 makes its exhaust gas logical
It is filtered when to exhaust pipe 3, allowing exhaust gas to contact with filter plate 13 urges it again while carrying out air filtration
Change, and stop collar 14 can prevent the bounce dislocation of third gear 74, improve the stability that third gear 74 is driven, sparge pipe 5
Bottom end through tower body 1 and extend to the inside of tower body 1 and be communicated with fog-spray nozzle 6, the bottom end of sparge pipe 5 is provided with auxiliary whirler
Structure 7, because assisted rotating mechanism 7 includes second gear 71, second gear 71 is socketed in the bottom on 5 surface of sparge pipe, 1 inner wall of tower body
Top be fixedly connected with shaft 72, the bottom on 72 surface of shaft is arranged with anti-fall off block 73, and the surface of shaft 72 is arranged with
Three gears 74, first gear 94 and second gear 71 are engaged with third gear 74, which passes through the second tooth shaft 72, anticreep
The setting for falling block 73 and third gear 74 enables its fog-spray nozzle 6 to rotate by first gear 94 and drives second gear 71 and the
One gear 94 is rotated, while second gear 71 drives water pipe and fog-spray nozzle 6 to carry out rotating spraying, so that fog-spray nozzle 6 be made to exist
It is rotated while spraying, the left side at 1 top of tower body is fixedly connected with fixed frame 8, and fixed frame 8 is internally provided with driver
Structure 9, because of transmission mechanism 9, including motor 91, the output shaft of motor 91 is fixedly connected with transmission shaft 92, the bottom on 92 surface of transmission shaft
Portion is socketed with flabellum 93, and transmission shaft is socketed with first gear 94 at the top of 92 surface, the design by motor 91, transmission shaft 92,
The setting of flabellum 93 and first gear 94 makes motor 91 drive transmission shaft by output shaft convenient for user by starting motor 91
92 and flabellum 93 be driven, while first gear 94 can be made to carry out rotation convenient for driving third gear 74 and second gear 71
It being rotated, the rotation of flabellum 93 can be such that the significantly more efficient surface with wave-shape board 4 of exhaust gas contacts, thus accelerate catalytic effect, then
Keep its contact surface wider by the wavy design of wave-shape board 4, catalysis range increases, and being sprayed for medicament for matching makes its catalysis more
Thoroughly, the left and right side of 1 inner wall bottom of tower body is fixedly connected to spoiler 10, because the bottom of spoiler 10 is provided with sponge
Plate 11, the inside of sponge plate 11 is immersed with exhaust gas catalyst, and the surface of wave-shape board 4 is coated with exhaust gas catalyst, what fog-spray nozzle 6 sprayed
Medicament is the proportion of sodium hydroxide and water, and the ratio of proportion is 1:15~20, which passes through the setting of sponge plate 11, make to give up
Gas passes through the progress air acidic catalyst of sponge plate 11 for impregnating catalyst, while wave-shape board 4 can make exhaust gas and catalyst more
Further contact catalysis, while having the medicament of ejection that there is sodium hydroxide by spraying, it can be to exhaust gas by its hygroscopy
In acidity etc. dissolved.
In use, user starts motor 91, exhaust gas is entered by air inlet pipe 2, then passes through spoiler 10 and sponge plate 11
The catalyst on surface carries out it to be catalyzed the acid that disappears, and motor 91 drives transmission shaft 92 to be rotated by output shaft, 92 band of transmission shaft
Dynamic first gear 94 and flabellum 93 are rotated, and the surface of air and wave-shape board 4 that the rotation of flabellum 93 flows up it carries out
Contact, while filter plate 13 makes air contact with wave-shape board 4 once be filtered and be catalyzed, and first gear 94 rotates drive the
Three gears 74 and second gear 71 are rotated, and second gear 71 rotates sparge pipe 5 with fog-spray nozzle 6, and fog-spray nozzle 6 is by medicine
Agent rotation sprinkling and under, the medicament and waste gas reaction for comparing sodium hydroxide and water reduce the acidity of its exhaust gas, last exhaust gas is
It can be discharged by exhaust pipe 3, keep exhaust gas acidic catalyst more thorough, reduce its air pollution.
In summary: the good ammonium paratungstate production spray column of the acidic catalyst effect, by the way that tower body 1, air inlet pipe is arranged
2, exhaust pipe 3, wave-shape board 4, sparge pipe 5, fog-spray nozzle 6, assisted rotating mechanism 7, fixed frame 8, transmission mechanism 9 and spoiler 10
It is used cooperatively, solves the problems, such as that existing ammonium paratungstate production spray column acidic catalyst is ineffective.
While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art,
It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired
Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.
Claims (6)
1. a kind of ammonium paratungstate production spray column that acidic catalyst effect is good, including tower body (1), it is characterised in that: the tower
It is communicated with air inlet pipe (2) on the left of body (1) bottom, the right side at the top of the tower body (1) is communicated with exhaust pipe (3), the tower body
(1) right side at the top of inner wall is fixedly connected with wave-shape board (4), and the right side at the top of the tower body (1) is communicated with sparge pipe (5), institute
The bottom end of sparge pipe (5) is stated through tower body (1) and extends to the inside of tower body (1) and is communicated with fog-spray nozzle (6), the sparge pipe
(5) bottom end is provided with assisted rotating mechanism (7), and the left side at the top of the tower body (1) is fixedly connected with fixed frame (8), described
Fixed frame (8) is internally provided with transmission mechanism (9), and the left and right side of tower body (1) the inner wall bottom is fixedly connected to
Spoiler (10).
2. a kind of good ammonium paratungstate production spray column of acidic catalyst effect according to claim 1, it is characterised in that:
The bottom of the spoiler (10) is provided with sponge plate (11), and the inside of the sponge plate (11) is immersed with exhaust gas catalyst, institute
The surface for stating wave-shape board (4) is coated with exhaust gas catalyst, and the medicament that the fog-spray nozzle (6) sprays is the proportion of sodium hydroxide and water,
Its ratio matched is 1:15~20.
3. a kind of good ammonium paratungstate production spray column of acidic catalyst effect according to claim 1, it is characterised in that:
The output shaft of the transmission mechanism (9), including motor (91), the motor (91) is fixedly connected with transmission shaft (92), the biography
The bottom on moving axis (92) surface is socketed with flabellum (93), is socketed with first gear (94) at the top of transmission shaft (92) surface.
4. a kind of good ammonium paratungstate production spray column of acidic catalyst effect according to claim 3, it is characterised in that:
The assisted rotating mechanism (7) includes second gear (71), and the second gear (71) is socketed in the bottom on sparge pipe (5) surface
Portion is fixedly connected with shaft (72) at the top of tower body (1) inner wall, and the bottom on shaft (72) surface is arranged with anti-dropout
The surface of block (73), the shaft (72) is arranged with third gear (74), and the first gear (94) and second gear (71) are equal
It is engaged with third gear (74).
5. a kind of good ammonium paratungstate production spray column of acidic catalyst effect according to claim 4, it is characterised in that:
The sparge pipe (5) is flexibly connected with fog-spray nozzle (6) by union (12), the left and right side at the top of the wave-shape board (4)
It is fixedly connected to filter plate (13), the surface of the filter plate (13) is coated with exhaust gas catalyst, the surface of the shaft (72)
It is fixedly connected with the stop collar (14) being located on the upside of third gear (74).
6. a kind of good ammonium paratungstate production spray column of acidic catalyst effect according to claim 1, it is characterised in that:
Top on the left of tower body (1) inner wall is fixedly connected with the first limit plate (16), the internal right side of first limit plate (16)
Side is connect with the surface activity of transmission shaft (92), and the right side at the top of tower body (1) inner wall is fixedly connected with position-limited rack (15), institute
It states the bottom on the left of position-limited rack (15) to be fixedly connected with the second limit plate (17), second limit plate (17) and sparge pipe (5)
The bottom on surface is flexibly connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821722561.2U CN209696684U (en) | 2018-10-24 | 2018-10-24 | A kind of ammonium paratungstate production spray column that acidic catalyst effect is good |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821722561.2U CN209696684U (en) | 2018-10-24 | 2018-10-24 | A kind of ammonium paratungstate production spray column that acidic catalyst effect is good |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209696684U true CN209696684U (en) | 2019-11-29 |
Family
ID=68634733
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821722561.2U Expired - Fee Related CN209696684U (en) | 2018-10-24 | 2018-10-24 | A kind of ammonium paratungstate production spray column that acidic catalyst effect is good |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209696684U (en) |
-
2018
- 2018-10-24 CN CN201821722561.2U patent/CN209696684U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191129 |
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| CF01 | Termination of patent right due to non-payment of annual fee |