CN208513634U - A kind of spheroidising ladle - Google Patents
A kind of spheroidising ladle Download PDFInfo
- Publication number
- CN208513634U CN208513634U CN201821215383.4U CN201821215383U CN208513634U CN 208513634 U CN208513634 U CN 208513634U CN 201821215383 U CN201821215383 U CN 201821215383U CN 208513634 U CN208513634 U CN 208513634U
- Authority
- CN
- China
- Prior art keywords
- nodularization
- side wall
- spheroidising
- dykes
- dams
- 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
Landscapes
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The utility model discloses a kind of spheroidising ladle.A kind of spheroidising ladle, including with fire resisting brick masonry at upper side wall and with the nodularization room of castable moulding by casting, the upper side wall lower part and nodularization room side wall upper part is tightly connected, and the nodularization room includes the dykes and dams that pit buffer and nodulizer placement hole are divided into positioned at its bottom inside, by nodularization indoor section.A kind of spheroidising of the utility model ladle has the characteristics that long service life, manufacturing cost are low, manufacture difficulty is low, nodularization effect is excellent.
Description
Technical field
The utility model relates to a kind of ladle, more specifically more particularly to a kind of spheroidising ladle.
Background technique
Foundry ladle is in the pouring practice of steel casting workshop, after molten iron is accepted in stokehold, transports to casting mold by driving and carries out
Casting.Manually or electrically mode drives the deceleration mechanism being installed on backpack body that backpack body is made to vert when casting, to casting mold
It is poured.Nodularization is surrounded by the ladle different from gray iron, generally all puts nodulizer in packet bottom setting dykes and dams, spheroidising
In the other side of effluent trough, it is also proximate to casting side, can liquidate to avoid molten iron to nodulizer, play the effect for delaying nodularization
Fruit.But the material for making nodularization packet and dykes and dams is different, cause the service life of nodularization packet and dykes and dams short and nodularization effect respectively not
It is identical.The problem of traditional nodularization packet, has:
(1) be as shown in Figure 1 and Figure 2 a kind of traditional nodularization packet, main body 1 ' and dykes and dams 2 ' using fire resisting brick masonry and
At.Due to the 2 ' limited strength of dykes and dams of fire resisting brick masonry, in addition washing away and corroding for molten iron, leads to refractory brick dykes and dams 2 ' soon
It collapses, and needs to build again, it is so previous, cost and spheroidizing quality certainly will be influenced.
(2) a kind of traditional ladle integrally uses castable moulding by casting, because castable is expensive, therefore whole system
Make higher cost, and because ladle side wall is higher, the technique poured requires height, manufacture difficulty big, while need to set using dedicated
It is standby that tympaning is sintered.
Utility model content
The purpose of this utility model is to provide a kind of spheroidising ladle, have long service life, manufacturing cost
Feature low, manufacture difficulty is low, nodularization effect is excellent.
The technical solution of the utility model is as follows:
A kind of spheroidising ladle, including with fire resisting brick masonry at upper side wall and with the ball of castable moulding by casting
Change room, the upper side wall lower part and nodularization room side wall upper part are tightly connected, the nodularization room include positioned at its bottom inside,
Nodularization indoor section is divided into pit buffer and nodulizer places the dykes and dams in hole.
Further, the upper side wall top edge be equipped with packet mouth, the dykes and dams by nodularization room around its central point
Equipartition is at least three pit bodies, and distance packet mouth is farthest in each pit body one is pit buffer, remaining pit body is
Nodulizer places hole.
Further, the part that the middle part of the dykes and dams and dykes and dams are located at pit buffer wherein side is above its remaining part
Point.
Further, the inside of the upper side wall lower edge is the annular boss extended downwardly, the nodularization room
The inside at side wall upper part edge is the recessed portion for being adapted and extending downwardly with annular boss.
Further, the side wall of the nodularization room is higher than dykes and dams.
Further, the nodularization room bottom with a thickness of 150~200mm, the height of the dykes and dams is 250~
350mm, the nodularization room side wall is 50~80mm higher than dykes and dams, and the thickness of the upper side wall and nodularization room side wall is 100
~150mm.
The utility model has the beneficial effect that
1. a kind of spheroidising ladle of the utility model, upper side wall is formed using traditional fire resisting brick masonry,
And by the nodularization room with castable moulding by casting, the bottom inside of nodularization room is dykes and dams, and nodularization indoor section is divided by dykes and dams
Pit buffer and nodulizer place hole, and in pouring practice, molten iron flows into the nodulizer placement for being placed with nodulizer out of pit buffer
Hole, can carry out spheroidising in ladle;Meanwhile with traditional entirety using fire resisting brick masonry at nodularization packet compared with,
With ladle, the service life is longer for a kind of spheroidising of the utility model, and 1800 packets time or more can be used, and is traditional whole brick
It is more than the nodularization packet three times of block;Compared with traditional entirety is using the ladle of castable moulding by casting, the one of the utility model
The Sidewall Height of the nodularization room of kind spheroidising ladle is low, and the requirement to molding and casting is low, and easily manufactured;Therefore,
A kind of spheroidising of the utility model with ladle have long service life, manufacturing cost is low, manufacture difficulty is low, nodularization effect
Very excellent feature;
2. dykes and dams will around central point equipartition be multiple pit bodies in nodularization room, the farthest portion of distance packet mouth in multiple pit bodies
Being divided into pit buffer, remaining is nodulizer placement hole, and compared with traditional only one nodulizer of nodularization packet places hole, this is practical newly
A kind of spheroidising of type places hole by multiple nodulizers with ladle and nodulizer places hole and is located at one close to packet mouth
Side is stablized when spheroidising, and nodulizer scaling loss is small, not only reduces the additional amount of nodulizer, but also spheroidizing quality is stable, excellent,
Nodularization room dross is reduced, is cleared up conveniently simultaneously, can be reduced labor intensity, be helped improve working environment;
3. the part that the middle part of dykes and dams and dykes and dams are located at pit buffer wherein side is above rest part, spheroidising molten iron
When, because the part that dykes and dams are located at pit buffer side is higher, molten iron can flow to nodulizer from the other side of pit buffer and place hole, and
And the middle part of dykes and dams is also higher, molten iron can flow successively through multiple nodulizers and place the effective nodularization of hole progress, reacting balance, into
One step improves liquid iron balling quality, and nodulizer scaling loss is small;
4. the inside of upper side wall lower edge is the annular boss extended downwardly, the inside at nodularization room side wall upper part edge is
The recessed portion for being adapted and extending downwardly with annular boss, upper side wall and nodularization room are sealed against each other by annular boss and recessed portion
Connection coincide convenient for more preferable, can also prevent molten iron from leaking from gap when gap occurs in junction, improves safety;
5. the side wall of nodularization room is higher than dykes and dams, molten iron violent scour when initial stage spheroidizing reacion can be prevented to be built into refractory brick
Upper side wall, to improve service life.
Detailed description of the invention
It, below will be to implementation in order to illustrate more clearly of the embodiments of the present invention or technical solution in the prior art
Example or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is only the embodiments of the present invention, for those of ordinary skill in the art, without creative efforts,
It is also possible to obtain other drawings based on these drawings.
Fig. 1 is one of background technique nodularization packet schematic diagram;
Fig. 2 is the top view of one of background technique nodularization packet;
Fig. 3 is a kind of spheroidising ladle schematic diagram of the utility model embodiment 1;
Fig. 4 is a kind of top view of spheroidising ladle of the utility model embodiment 1;
Fig. 5 is the portion the A enlarged drawing of Fig. 3;
Fig. 6 is a kind of top view of spheroidising ladle of the utility model embodiment 2.
Wherein: 1- upper side wall, 2- nodularization room, 3- dykes and dams, 4- pit buffer, 5- nodulizer placement hole, 6- packet mouth, 7- ring-type are convex
Platform, 51- level-one nodulizer place hole, 52- second level nodulizer places hole, 1 '-main body, 2 '-dykes and dams.
Specific embodiment
With reference to embodiment, the technical solution of the utility model is described in further detail, but not structure
Any restrictions of pairs of the utility model.
Embodiment 1
Refering to shown in Fig. 3~5, a kind of spheroidising ladle of the utility model, including with fire resisting brick masonry at
Upper side wall 1 and nodularization room 2 with castable moulding by casting, 1 lower part of upper side wall and 2 side wall upper part of nodularization room are tightly connected, nodularization
Room 2 includes being located at its bottom inside, being divided into pit buffer 4 inside nodularization room 2 and the dykes and dams 3 in nodulizer placement hole 5.
A kind of spheroidising ladle of the utility model, upper side wall 1 are formed using traditional fire resisting brick masonry, and
By the nodularization room 2 with castable moulding by casting, the bottom inside of nodularization room 2 is dykes and dams 3, dykes and dams 3 by 2 inner part of nodularization room every
Hole 5 is placed for pit buffer 4 and nodulizer, in pouring practice, molten iron flows into the nodulizer for being placed with nodulizer out of pit buffer 4
Hole 5 is placed, spheroidising can be carried out in ladle.Meanwhile with traditional entirety using fire resisting brick masonry at nodularization packet
It compares, with ladle, the service life is longer for a kind of spheroidising of the utility model, and 1800 packets time or more can be used, be traditional
It is more than nodularization packet three times.Compared with traditional entirety is using the ladle of castable moulding by casting, a bulb of the utility model
The Sidewall Height for changing the nodularization room 2 of processing ladle is low, and the requirement to molding and casting is low, and easily manufactured.Therefore, this reality
With a kind of novel spheroidising ladle have long service life, manufacturing cost is low, manufacture difficulty is low, nodularization effect is excellent
The characteristics of.
1 top edge of upper side wall be equipped with packet mouth 6, dykes and dams 3 by nodularization room 2 around its central point equipartition at least three
Pit body, distance packet mouth 6 is farthest in each pit body one are pit buffer 4, remaining pit body is that nodulizer places hole 5.The present embodiment
In, dykes and dams 3 by nodularization room 2 around its central point equipartition at three pit bodies, three pit bodies include that two nodulizers place hole 5
With a pit buffer 4.
Dykes and dams 3 by nodularization room 2 around its central point equipartition be three pit bodies, i.e., dykes and dams 3 be close to Y type structure,
Compared with traditional only one nodulizer of nodularization packet places hole 5, a kind of spheroidising of the present embodiment passes through two with ladle
A nodulizer places hole 5 and nodulizer is placed hole 5 and is located at close to the sides of packet mouth 6, and when spheroidising stablizes, nodulizer scaling loss
It is small, the additional amount of nodulizer is not only reduced, but also spheroidizing quality is stable, excellent, while 2 dross of nodularization room is reduced, cleaning is convenient,
Labor intensity can be reduced, working environment is helped improve.
The inside of 1 lower edge of upper side wall is the annular boss 7 extended downwardly, the inside at 2 side wall upper part edge of nodularization room
For the recessed portion for being adapted and extending downwardly with annular boss 7, it is bonded between the two by fire clay.Upper side wall 1 and nodularization room 2
Connection is sealed against each other by annular boss 7 and recessed portion, coincide convenient for more preferable, iron can also be prevented when gap occurs in junction
Water is leaked from gap, improves safety.
The side wall of nodularization room 2 is higher than dykes and dams 3, can prevent molten iron from washing away the upper side wall 1 being built into refractory brick, improves and uses the longevity
Life.
2 bottom of nodularization room with a thickness of 150~200mm, the height of dykes and dams 3 is 250~350mm, and 2 side wall of nodularization room compares dike
Dam 3 is 50~80mm high, and the thickness of 2 side wall of upper side wall 1 and nodularization room is 100~150mm.
In the manufacture of nodularization room 2, the raw material of castable includes: the aluminium oxide (AL of 85.0-91.0%2O3), 4.5-5.0%
Silica (SiO2), the titanium oxide (TiO of 1.5-2.1%2), the iron oxide (Fe of 1.0-1.5%2O3), 4.2-4.4%
Chromium oxide (Cr2O3).More specifically, wherein aluminium oxide accounts for 88.0%;Silica accounts for 4.7%;Titanium oxide accounts for 1.8%;Oxidation
Iron accounts for 1.2%;Chromium oxide accounts for 4.3%.The raw material of 2 castable of nodularization room includes: the aluminium oxide of 85.0-91.0%, 4.5-5.0%
Silica, the titanium oxide of 1.5-2.1%, the iron oxide of 1.0-1.5%, 4.2-4.4% chromium oxide, wherein this is practical new
Alumina content is higher than the content of aluminium oxide in traditional ladle in type, hence it is evident that improves a kind of spheroidising of the utility model
With ladle pressure resistance performance and high temperature resistance.Meanwhile the utility model in chromic oxide content than chromium oxide in traditional ladle
Content it is low in the case where, the performance of iron-resistant water high temperature erosion is also promoted, and the cost of raw material is reduced.Therefore, this reality
Has the characteristics that long service life, at low cost with a kind of novel spheroidising ladle.
A kind of manufacture craft of spheroidising ladle of the utility model, includes the following steps,
Step 1: the raw material preparation of 2 castable of nodularization room, 2.98 grams every cube of density after mixing the raw material of castable
Centimetre, maximum operation (service) temperature is 1750 DEG C;
Step 2: nodularization room 2 starts to pour, and is stirred uniformly using castable and water, pours into in-mold molding, wherein
The weight for adding water is the 4.7%~5.5% of castable weight;
Step 3: the baking sintering of nodularization room 2;
Step 4: nodularization room 2 is integrally placed to packet bottom, and fixed by the cylinder-packing production of upper side wall 1, along nodularization room 2
Side wall continues to build refractory brick to finishing;
Step 5: baking, baking process includes: to be toasted after upper side wall 1 completes 24 hours, with 100 DEG C/h
600 DEG C are warming up to, and keeps the temperature 12 hours;
Step 6: using preceding use, high temperature liquid iron scalds packet 2~3 times, 3-5 minutes each.
Wherein, the nodularization room 2 of step 3 is toasted sintering process and is included the following steps,
Step 3-1: after solidifying 20~24 hours at room temperature, demoulding;
Step 3-2: after being warming up to 100 DEG C with 20 DEG C/h, keeping the temperature 8 hours, when encountering a large amount of water vapours, stops heating,
After steam spilling, continue to heat, it is therefore an objective to prevent material from bursting;
Step 3-3: after being warming up to 230 DEG C with 20 DEG C/h, 4 hours are kept the temperature;
Step 3-4: after being warming up to 550 DEG C with 50 DEG C/h, 4 hours are kept the temperature;
Step 3-5: after being warming up to 900 DEG C with 75 DEG C/h, 8 hours are kept the temperature;
Step 3-6: after being warming up to 1100 DEG C with 100 DEG C/h, 8 hours are kept the temperature.
The manufacture craft of a kind of spheroidising ladle of the utility model, at its specific baking and sintering
Reason can effectively reduce the porosity of the nodularization room 2 of pouring molding, ladle intensity and iron-resistant water erosion ability be improved, to mention
High ladle service life.
Embodiment 2
As shown in fig. 6, a kind of spheroidising ladle and embodiment 1 of the utility model embodiment 2 are almost the same,
All features including one of embodiment 1 spheroidising ladle.In addition, the middle part of dykes and dams 3 and dykes and dams 3 are located at buffering
The part of 4 wherein side of hole is above rest part.When spheroidising molten iron, because dykes and dams 3 be located at the part of 4 side of pit buffer compared with
Height, molten iron can flow to nodulizer from the other side of pit buffer 4 and place hole 5, also, the middle part of dykes and dams 3 is also higher, and molten iron can be successively
It flows through multiple nodulizers and places the 5 effective nodularization of progress of hole.Before molten iron enters spheroidising ladle, in nodularization room 2
It flows to and is put into nodulizer in multiple nodulizers placements hole 5 along molten iron, the nodulizer equipped with nodulizer places 5 quantity of hole can basis
Actual needs is adjusted, and can place hole with only one nodulizer and nodulizer is housed, can also all nodulizers place hole all
It is placed with nodulizer.Molten iron spills into nodulizer placement hole adjacent thereto from a lower height of side of dykes and dams 3 after entering pit buffer 4
It is mixed in 5 with nodulizer.The structure can ensure that all molten iron can come into full contact with substantially with nodulizer, further increase liquid iron balling
Quality, nodulizer scaling loss are small.
More specifically, in the present embodiment, it is two that nodulizer, which places hole 5, and two nodulizers place hole 5 in the counterclockwise direction
It is followed successively by the first nodulizer and places hole 51 and the second nodulizer placement hole 52.When liquid iron balling, the one kind of molten iron in the present embodiment
Counterclockwise flow in spheroidising ladle flows successively through pit buffer 4, the first nodulizer places hole 51 and the second nodulizer
Place hole 52.Dykes and dams 3 are located at pit buffer 4 and the part in the second nodulizer placement hole 52 is higher than other parts.
A kind of spheroidising ladle of the utility model embodiment 2 equally have long service life, manufacturing cost it is low,
The feature that manufacture difficulty is low, nodularization effect is excellent.
Compared with prior art, properties all have significant raising for the embodiments of the present invention 1 and embodiment 2.
Wherein, by traditional a kind of nodularization packet as a comparison case 1, by traditional a kind of ladle as a comparison case 2.
Comparative example 1: traditional a kind of nodularization packet as shown in Figure 1 and Figure 2, main body 1 ' and dykes and dams 2 ' use refractory brick
It builds.
Comparative example 2: a kind of nodularization packet of tradition, main body 1 ' and dykes and dams 2 ' use castable moulding by casting.Castable
Raw material specifically: aluminium oxide accounts for 77.1%;Silica accounts for 14.2%;Iron oxide accounts for 1.4%;Chromium oxide accounts for 7.3%.Main body 1 '
Use dedicated wooden model or steel mould moulding by casting after naturally dry with dykes and dams 2 ', using large-scale dedicated ladle dryer to entire nodularization packet
Carry out baking sintering.
Following table be specification be 7 tons ladle in actual use parameters comparison:
By above table it can be concluded that, a kind of spheroidising ladle of the utility model and traditional ladle and
Nodularization packet is compared, and the porosity is substantially reduced, compressive resistance and service life significantly improve, and manufacturing cost is low, especially
It can get high Oxygen potential, nodularization effect is excellent, a kind of nodularization relative to traditional ladle and nodularization packet the utility model
Processing ladle properties are obviously improved.
Above-described is only preferred embodiments of the present invention, it should be pointed out that is come for those skilled in the art
It says, under the premise of not departing from the utility model structure, several deformations can also be made with ladle to this spheroidising and changed
Into these all will not influence the effect and patent practicability of the utility model implementation.
Claims (6)
1. a kind of spheroidising ladle, which is characterized in that including with fire resisting brick masonry at upper side wall (1) and use castable
The nodularization room (2) of moulding by casting, the upper side wall (1) lower part and nodularization room (2) side wall upper part are tightly connected, the nodularization
Room (2) includes positioned at its bottom inside, will be divided into pit buffer (4) inside nodularization room (2) and nodulizer places the dykes and dams for cheating (5)
(3)。
2. a kind of spheroidising ladle according to claim 1, which is characterized in that at the top of the upper side wall (1)
Edge is equipped with packet mouth (6), the dykes and dams (3) by nodularization room (2) around its central point equipartition at least three pit bodies, respectively
Distance packet mouth (6) is farthest in the pit body one is pit buffer (4), remaining pit body is that nodulizer places hole (5).
3. a kind of spheroidising ladle according to claim 2, which is characterized in that the middle part of the dykes and dams (3)
The part for being located at pit buffer (4) wherein side with dykes and dams (3) is above rest part.
4. a kind of spheroidising ladle according to claim 1, which is characterized in that described upper side wall (1) lower part
The inside at edge is the annular boss (7) extended downwardly, and the inside at described nodularization room (2) the side wall upper part edge is convex with ring-type
The recessed portion that platform (7) is adapted and extends downwardly.
5. a kind of spheroidising ladle according to claim 1, which is characterized in that the side of the nodularization room (2)
Wall is higher than dykes and dams (3).
6. a kind of spheroidising ladle according to claim 1, which is characterized in that described nodularization room (2) bottom
With a thickness of 150~200mm, the height of the dykes and dams (3) is 250~350mm, and described nodularization room (2) side wall compares dykes and dams
(3) thickness of high 50~80mm, the upper side wall (1) and nodularization room (2) side wall is 100~150mm.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201821215383.4U CN208513634U (en) | 2018-07-30 | 2018-07-30 | A kind of spheroidising ladle |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201821215383.4U CN208513634U (en) | 2018-07-30 | 2018-07-30 | A kind of spheroidising ladle |
Publications (1)
Publication Number | Publication Date |
---|---|
CN208513634U true CN208513634U (en) | 2019-02-19 |
Family
ID=65333265
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201821215383.4U Expired - Fee Related CN208513634U (en) | 2018-07-30 | 2018-07-30 | A kind of spheroidising ladle |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN208513634U (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108637231A (en) * | 2018-07-30 | 2018-10-12 | 广东中天创展球铁有限公司 | A kind of spheroidising ladle and its manufacture craft |
-
2018
- 2018-07-30 CN CN201821215383.4U patent/CN208513634U/en not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108637231A (en) * | 2018-07-30 | 2018-10-12 | 广东中天创展球铁有限公司 | A kind of spheroidising ladle and its manufacture craft |
CN108637231B (en) * | 2018-07-30 | 2023-09-12 | 广东中天创展球铁有限公司 | Ladle for spheroidizing and manufacturing process thereof |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN206622605U (en) | A kind of three machines three stream slab CC tundish | |
CN101386067B (en) | Ladle liner and laying technique thereof | |
CN105750515A (en) | Small-capacity master alloy casting system | |
CN105565830A (en) | Composite material RH finery dipping pipe outer wrapping body and molding process thereof | |
CN111069579B (en) | Long-life tundish integral impact barrel, formula and manufacturing process thereof | |
CN208513634U (en) | A kind of spheroidising ladle | |
CN101880839A (en) | Process for producing wear-resistance high-manganese steel through suspension casting | |
CN104827020A (en) | Combined type ladle nozzle seating brick with long service life and low cost and preparing technology thereof | |
CN204621070U (en) | A kind of combined type high life low cost ladle pocket block | |
CN106345990A (en) | Preparation method of composite intermediate wall for continuous casting tundish | |
CN208408476U (en) | Pouring basin and the device for being used to prepare heat-resisting steel casting | |
CN209379873U (en) | A kind of bottom filling purifying smelting device | |
CN114769573B (en) | Stopper rod and method for preventing continuous casting pouring low-temperature accident | |
CN112828270A (en) | Casting steel launder device of vacuum induction smelting furnace | |
CN103302259B (en) | Continuous-casting tundish slag stopping dam and manufacturing method thereof | |
CN217701335U (en) | Ladle bottom structure capable of effectively reducing residual amount of molten steel in ladle | |
CN203768208U (en) | High-efficiency homogenizing clarifying tank with all-platinum structure | |
CN108637231A (en) | A kind of spheroidising ladle and its manufacture craft | |
CN107321924B (en) | Semi-permanent type double-sprue basin combined structure and combined use method thereof | |
CN213496458U (en) | Single-flow continuous casting channel type tundish with air curtain retaining wall | |
CN2659590Y (en) | Form following mold box for smelting slag basin | |
CN210475518U (en) | Composite Moricatt molten steel flow controller with better corrosion resistance | |
CN203695934U (en) | Molten iron jar slag stopper with molten iron flowing opening | |
CN110451931B (en) | Slag blocking wall for split combined tundish and preparation and use method thereof | |
CN2333464Y (en) | Continuous casting pouring basket turbulence-proof portition |
Legal Events
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: 20190219 Termination date: 20210730 |
|
CF01 | Termination of patent right due to non-payment of annual fee |