CN208872115U - A kind of cooling kiln of VN alloy production - Google Patents
A kind of cooling kiln of VN alloy production Download PDFInfo
- Publication number
- CN208872115U CN208872115U CN201821580320.9U CN201821580320U CN208872115U CN 208872115 U CN208872115 U CN 208872115U CN 201821580320 U CN201821580320 U CN 201821580320U CN 208872115 U CN208872115 U CN 208872115U
- Authority
- CN
- China
- Prior art keywords
- fixedly connected
- reaction
- reaction chamber
- inner cavity
- box
- 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
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 26
- 239000000956 alloy Substances 0.000 title claims abstract description 26
- 238000001816 cooling Methods 0.000 title claims abstract description 25
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 22
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000011521 glass Substances 0.000 claims description 8
- 238000009423 ventilation Methods 0.000 claims description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 28
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 14
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 7
- 239000001301 oxygen Substances 0.000 abstract description 7
- 229910052760 oxygen Inorganic materials 0.000 abstract description 7
- 239000002341 toxic gas Substances 0.000 abstract description 5
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 8
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 8
- MGWGWNFMUOTEHG-UHFFFAOYSA-N 4-(3,5-dimethylphenyl)-1,3-thiazol-2-amine Chemical compound CC1=CC(C)=CC(C=2N=C(N)SC=2)=C1 MGWGWNFMUOTEHG-UHFFFAOYSA-N 0.000 description 5
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 5
- 229910000029 sodium carbonate Inorganic materials 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 description 2
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 229910000742 Microalloyed steel Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 235000011089 carbon dioxide Nutrition 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- PNXOJQQRXBVKEX-UHFFFAOYSA-N iron vanadium Chemical compound [V].[Fe] PNXOJQQRXBVKEX-UHFFFAOYSA-N 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 235000010344 sodium nitrate Nutrition 0.000 description 1
- 235000010288 sodium nitrite Nutrition 0.000 description 1
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- Battery Electrode And Active Subsutance (AREA)
Abstract
The utility model discloses a kind of cooling kilns of VN alloy production, including pedestal, left side at the top of the pedestal is fixedly connected with cooler bin, downtake pipe is communicated between top and bottom on the right side of the cooler bin, and the first air inlet pipe is communicated on the right side of downtake pipe, right side at the top of the pedestal is fixedly connected with treatment box, and motor housing is fixedly connected on the right side for the treatment of box, the top of the pedestal and reaction chamber is fixedly connected between cooler bin and treatment box, air box is fixedly connected with by fixed block between the cooler bin and reaction chamber, the utility model relates to VN alloy process units technical fields.The cooling kiln of VN alloy production, by under the power on condition inside reaction chamber, so that nitrogen is reacted with oxygen, tentatively remove the cooled rear nitrogen generated, greatly reduce the threat that toxic gas generates human health, have good practicability, good economic benefit can be brought.
Description
Technical field
The utility model relates to VN alloy process units technical field, specially a kind of cooling kiln of VN alloy production
Furnace.
Background technique
VN alloy is used for the production of micro alloyed steel as a kind of novel steel additive agent, alternative vanadium iron, can be significantly
Improve the comprehensive performances such as intensity, toughness, ductility, the thermal fatigue resistance of steel.It may be said that VN alloy answering in steel and iron industry
With more come about universal.In the prior art, mainly pass through conventional continuous high-temperature for the mode of industrial production VN alloy
Sintering oven production, using the chamber structure of pushed bat kiln, is longitudinally disposed with low-temperature zone, changeover portion, high temperature section and cooling section, often
A heating section is provided with several warm areas, cooling section is divided into natural cooling and forces cooling zone, but VN alloy is subcooled in experience
But the toxic gases such as for example nitrogen left can be generated later, this can generate damage to a certain extent to the health of human body
Evil.
The cooling kiln of existing VN alloy production cannot carry out the cooled rear toxic gas nitrogen generated effective
Processing, produces great threat to the health of human body, this makes existing device be difficult to meet the needs of actual life,
Do not have good practicability, good economic benefit cannot be brought, reduces people to its utilization rate.
Utility model content
In view of the deficiencies of the prior art, the utility model provides a kind of cooling kiln of VN alloy production, solves
The problem of cooling kiln of VN alloy production cannot be effectively treated the cooled rear toxic gas nitrogen generated.
In order to achieve the above object, the utility model is achieved by the following technical programs: a kind of production of VN alloy
Kiln, including pedestal are cooled down, the left side at the top of the pedestal is fixedly connected with cooler bin, top and bottom on the right side of the cooler bin
It is communicated with downtake pipe between portion, and is communicated with the first air inlet pipe on the right side of downtake pipe, the right side at the top of the pedestal
Side is fixedly connected with treatment box, and motor housing is fixedly connected on the right side for the treatment of box, the top of the pedestal and be located at cooling
It is fixedly connected with reaction chamber between case and treatment box, blower is fixedly connected with by fixed block between the cooler bin and reaction chamber
Case, and the bottom of blower box cavity is fixedly connected with suction ventilator, and the right end of first air inlet pipe through reaction chamber and extends
To the inner cavity of reaction chamber, the top on the right side of the reaction chamber is communicated with the second air inlet pipe, and the top of the reaction box cavity is fixed
It is connected with the first reaction utensil, and the bottom of the first reaction utensil inner cavity is fixedly connected with battery plate, the bottom of the reaction box cavity
And be located at immediately below the first reaction utensil and be fixedly connected with power supply, it is communicated with connecting tube on the left of the processing box cavity, and
The bottom of processing box cavity is fixedly connected with the second reaction utensil.
Preferably, the bottom end of first air inlet pipe sequentially passes through air box and reaction chamber and extends to the interior of reaction chamber
Chamber, the bottom that first air inlet pipe extends to reaction box cavity are communicated with escape pipe, and the bottom end of the escape pipe runs through first
The bottom end of reaction utensil and the inner cavity for extending to the first reaction utensil, second air inlet pipe sequentially passes through reaction chamber and the first reaction utensil
And extend to the inner cavity of the first reaction utensil.
Preferably, the two sides of the battery plate bottom pass through electric wire and are fixedly connected with the two sides at the top of power supply.
Preferably, the left end of the connecting tube sequentially passes through reaction chamber and the first reaction utensil and extends to the first reaction utensil
Inner cavity, the bottom of the connecting tube are communicated with glass tube, and the bottom end of the glass tube through the second reaction utensil and extends to second
The inner cavity of reaction utensil.
Preferably, the bottom of the motor box cavity is fixedly connected with motor by fixed block, and motor is defeated
Shaft is fixedly connected with rotating bar, and the left end of the rotating bar sequentially passes through motor housing, treatment box and the second reaction utensil and extends
To the inner cavity of the second reaction utensil, the two sides that the rotating bar extends to the second reaction utensil surface of internal cavity are fixedly connected to blade.
Preferably, the top on the right side of the treatment box is communicated with second exhaust pipe.
Preferably, ventilation pipe is communicated between the top and bottom on the left of the cooler bin.
Beneficial effect
The utility model provides a kind of cooling kiln of VN alloy production.Have compared with prior art following beneficial
Effect:
(1), the cooling kiln of VN alloy production, is fixedly connected with cooler bin by the left side at the top of pedestal, cooling
It is communicated with downtake pipe between top and bottom on the right side of case, and is communicated with the first air inlet pipe on the right side of downtake pipe,
Right side at the top of pedestal is fixedly connected with treatment box, and motor housing is fixedly connected on the right side for the treatment of box, the top of pedestal and
It is fixedly connected with reaction chamber between cooler bin and treatment box, is fixedly connected between cooler bin and reaction chamber by fixed block
Air box, and the bottom of blower box cavity is fixedly connected with suction ventilator, and the right end of the first air inlet pipe through reaction chamber and extends
To the inner cavity of reaction chamber, the top on the right side of reaction chamber is communicated with the second air inlet pipe, reacts and is fixedly connected at the top of box cavity
One reaction utensil, and the bottom of the first reaction utensil inner cavity is fixedly connected with battery plate, reacts the bottom of box cavity and is located at first instead
It answers and is fixedly connected with power supply immediately below ware, by under the power on condition inside reaction chamber, so that nitrogen is reacted with oxygen,
The cooled rear nitrogen generated is tentatively removed, the threat that toxic gas generates human health is greatly reduced, has well
Practicability can bring good economic benefit, substantially increase people to the utilization rate of the device.
(2), the cooling kiln of VN alloy production by being communicated with connecting tube on the left of processing box cavity, and is located
The bottom of reason box cavity is fixedly connected with the second reaction utensil, and the bottom of motor box cavity is fixedly connected with electronic by fixed block
Machine, and the output shaft of motor is fixedly connected with rotating bar, and the left end of rotating bar sequentially passes through motor housing, treatment box and second
Reaction utensil and the inner cavity for extending to the second reaction utensil, the two sides that rotating bar extends to the second reaction utensil surface of internal cavity are fixedly connected with
There is blade, substantially increase solution in the second reaction utensil and be passed through the reaction efficiency of gas, and will not largely consume user
The amount of labour, use is simple and convenient, have good economic benefit.
Detailed description of the invention
FIG. 1 is a schematic structural view of the utility model；
Fig. 2 is the utility model air box and the cross-sectional view for reacting box structure；
Fig. 3 is the cross-sectional view that the utility model handles box structure.
In figure: 1 pedestal, 2 cooler bins, 3 downtake pipes, 4 first air inlet pipe, 5 treatment boxes, 6 motor housings, 7 reaction chambers, 8
Air box, 9 suction ventilators, 10 second air inlet pipe, 11 first reaction utensils, 12 battery plates, 13 power supplys, 14 connecting tubes, 15 second reaction utensils,
16 escape pipes, 17 glass tubes, 18 motor, 19 rotating bars, 20 blades, 21 second exhaust pipes, 22 ventilation pipes.
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. 1-3 is please referred to, the utility model provides a kind of technical solution: a kind of cooling kiln of VN alloy production, packet
Pedestal 1 is included, the left side at 1 top of pedestal is fixedly connected with cooler bin 2, is communicated with and changes between the top and bottom in 2 left side of cooler bin
Tracheae 22 is communicated with downtake pipe 3, and the right side connection of downtake pipe 3 between the top and bottom on the right side of cooler bin 2
There is the first air inlet pipe 4, the bottom end of the first air inlet pipe 4 sequentially passes through air box 8 and reaction chamber 7 and the inner cavity for extending to reaction chamber 7,
The bottom that first air inlet pipe 4 extends to 7 inner cavity of reaction chamber is communicated with escape pipe 16, and escape pipe 16 is provided with 3, escape pipe 16
Bottom end runs through the first reaction utensil 11 and extends to the inner cavity of the first reaction utensil 11, and nitrogen is inputted the first reaction utensil 11 by escape pipe 16
Interior, nitrogen, which can carry out reacting with oxygen in energization, in the first reaction utensil 11 generates nitric oxide, and then nitric oxide
It is reacted with oxygen and generates nitrogen dioxide, the bottom end of the second air inlet pipe 10 sequentially passes through reaction chamber 7 and the first reaction utensil 11 and extends
To the inner cavity of the first reaction utensil 11, the right side at 1 top of pedestal is fixedly connected with treatment box 5, and the top on 5 right side for the treatment of box is communicated with
Second exhaust pipe 21, the surface of second exhaust pipe 21 is fixedly connected with valve, and the right side for the treatment of box 5 is fixedly connected with motor
The bottom of case 6,6 inner cavity of motor housing is fixedly connected with motor 18, and the fixed company of output shaft of motor 18 by fixed block
It is connected to rotating bar 19, the left end of rotating bar 19 sequentially passes through motor housing 6, treatment box 5 and the second reaction utensil 15 and extends to second
The inner cavity of reaction utensil 15 stores suitable sodium carbonate liquor in second reaction utensil 15, and rotating bar 19 extends to the second reaction utensil
The two sides of 15 surface of internal cavity are fixedly connected to blade 20, can accelerate the reaction effect of nitrogen dioxide and sodium carbonate, the top of pedestal 1
Portion and it is fixedly connected with reaction chamber 7 between cooler bin 2 and treatment box 5, passes through fixed block between cooler bin 2 and reaction chamber 7
It is fixedly connected with air box 8, and the bottom of 8 inner cavity of air box is fixedly connected with suction ventilator 9, the nitrogen that will be generated in cooler bin 2
Gas is directly entered under the effect of external force in the first reaction utensil 11, and the right end of the first air inlet pipe 4 through reaction chamber 7 and extends to anti-
The inner cavity of case 7 is answered, the top on 7 right side of reaction chamber is communicated with the second air inlet pipe 10, and the bottom of the second air inlet pipe 10 is fixedly connected with
Valve, is fixedly connected with the first reaction utensil 11 at the top of 7 inner cavity of reaction chamber, and the bottom of 11 inner cavity of the first reaction utensil fixed connects
It is connected to battery plate 12, the two sides of 12 bottom of battery plate pass through electric wire and are fixedly connected with the two sides at 13 top of power supply, 7 inner cavity of reaction chamber
Bottom and be located at the first reaction utensil 11 underface be fixedly connected with power supply 13, treatment box is communicated with connecting tube on the left of 5 inner cavity
14, the left end of connecting tube 14 sequentially passes through reaction chamber 7 and the first reaction utensil 11 and the inner cavity for extending to the first reaction utensil 11, connection
The bottom of pipe 14 is communicated with glass tube 17, and there are two the settings of glass tube 17, and the second reaction utensil 15 is run through simultaneously in the bottom end of glass tube 17
The inner cavity of the second reaction utensil 15 is extended to, and the bottom of 5 inner cavity for the treatment of box is fixedly connected with the second reaction utensil 15.
In use, suitable sodium carbonate liquor can will be added in user in the second reaction utensil, 10 bottom of the second air inlet pipe is opened
The valve in portion inputs oxygen, and power supply opening opens suction ventilator 9 and motor 18, and then generated nitrogen can in cooler bin 2
Nitrogen is made to enter the first reaction utensil by the first air inlet pipe 4 by the external force effect of suction ventilator 9 again by downtake pipe 3
In 11, the presence of battery plate 12 can provide necessary condition with reacting for oxygen for nitrogen, then nitrogen can in energization with oxygen
Gas carries out reaction and generates nitric oxide, and and then nitric oxide is reacted with oxygen generates nitrogen dioxide, and and then nitrogen dioxide is logical
Connecting tube 14 is crossed to enter in the second reaction utensil 15, nitrogen dioxide and sodium carbonate liquor react generation NaNO3, NaNO2 and
CO2, in addition the unlatching of motor 18 can drive rotating bar 19 to be rotated, and blade is promoted to be operated.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.
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 (7)
1. a kind of cooling kiln of VN alloy production, including pedestal (1), it is characterised in that: the left side at the top of the pedestal (1)
It is fixedly connected with cooler bin (2), is communicated with downtake pipe (3) between the top and bottom on the right side of the cooler bin (2), and
It is communicated on the right side of downtake pipe (3) the first air inlet pipe (4), the right side at the top of the pedestal (1) is fixedly connected with treatment box
(5), and on the right side for the treatment of box (5) be fixedly connected with motor housing (6), the top of the pedestal (1) and be located at cooler bin (2) and
It is fixedly connected between treatment box (5) reaction chamber (7), connects between the cooler bin (2) and reaction chamber (7) by the way that fixed block is fixed
It is connected to air box (8), and the bottom of air box (8) inner cavity is fixedly connected with suction ventilator (9), first air inlet pipe (4)
Right end is through reaction chamber (7) and extends to the inner cavities of reaction chamber (7), the top on the right side of the reaction chamber (7) be communicated with second into
Tracheae (10) is fixedly connected with the first reaction utensil (11) at the top of reaction chamber (7) inner cavity, and in the first reaction utensil (11)
The bottom of chamber is fixedly connected with battery plate (12), the bottom of reaction chamber (7) inner cavity and be located at the first reaction utensil (11) just under
Side is fixedly connected with power supply (13), is communicated with connecting tube (14) on the left for the treatment of box (5) inner cavity, and in treatment box (5)
The bottom of chamber is fixedly connected with the second reaction utensil (15).
2. a kind of cooling kiln of VN alloy production according to claim 1, it is characterised in that: first air inlet pipe
(4) bottom end sequentially passes through air box (8) and reaction chamber (7) and the inner cavity for extending to reaction chamber (7), first air inlet pipe
(4) bottom for extending to reaction chamber (7) inner cavity is communicated with escape pipe (16), and the bottom end of the escape pipe (16) is through the first reaction
The bottom end of ware (11) and the inner cavity for extending to the first reaction utensil (11), second air inlet pipe (10) sequentially passes through reaction chamber (7)
With the first reaction utensil (11) and extend to the inner cavities of the first reaction utensil (11).
3. a kind of cooling kiln of VN alloy production according to claim 1, it is characterised in that: battery plate (12) bottom
The two sides in portion pass through electric wire and are fixedly connected with the two sides at the top of power supply (13).
4. a kind of cooling kiln of VN alloy production according to claim 1, it is characterised in that: the connecting tube (14)
Left end sequentially pass through reaction chamber (7) and the first reaction utensil (11) and the inner cavity for extending to the first reaction utensil (11), the connection
The bottom of pipe (14) is communicated with glass tube (17), and the bottom end of the glass tube (17) is through the second reaction utensil (15) and extends to the
The inner cavity of two reaction utensils (15).
5. a kind of cooling kiln of VN alloy production according to claim 1, it is characterised in that: the motor housing (6)
The bottom of inner cavity is fixedly connected with motor (18) by fixed block, and the output shaft of motor (18) is fixedly connected with rotation
Bar (19), the left end of the rotating bar (19) sequentially pass through motor housing (6), treatment box (5) and the second reaction utensil (15) and extend
To the inner cavity of the second reaction utensil (15), the two sides that the rotating bar (19) extends to the second reaction utensil (15) surface of internal cavity are fixed
It is connected with blade (20).
6. a kind of cooling kiln of VN alloy production according to claim 1, it is characterised in that: the treatment box (5)
Second exhaust pipe (21) are communicated at the top of right side.
7. a kind of cooling kiln of VN alloy production according to claim 1, it is characterised in that: the cooler bin (2)
Ventilation pipe (22) is communicated between the top and bottom in left side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821580320.9U CN208872115U (en) | 2018-09-27 | 2018-09-27 | A kind of cooling kiln of VN alloy production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821580320.9U CN208872115U (en) | 2018-09-27 | 2018-09-27 | A kind of cooling kiln of VN alloy production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208872115U true CN208872115U (en) | 2019-05-17 |
Family
ID=66468862
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821580320.9U Expired - Fee Related CN208872115U (en) | 2018-09-27 | 2018-09-27 | A kind of cooling kiln of VN alloy production |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208872115U (en) |
-
2018
- 2018-09-27 CN CN201821580320.9U patent/CN208872115U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 441000 Wang Wan Group, Nancheng, Zaoyang City, Xiangyang City, Hubei Province Patentee after: Hubei zhongvanadium New Material Co.,Ltd. Address before: 441000 Wang Wan Group, Nancheng, Zaoyang City, Xiangyang City, Hubei Province Patentee before: ZAOYANG PINGFAN VANADIUM-NITROGEN CO.,LTD. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190517 |