CN102286699B - Corrosion-resistant steel with impact molding rate not smaller than 150 per minute for cell shell and preparation method thereof - Google Patents
Corrosion-resistant steel with impact molding rate not smaller than 150 per minute for cell shell and preparation method thereof Download PDFInfo
- Publication number
- CN102286699B CN102286699B CN 201110232765 CN201110232765A CN102286699B CN 102286699 B CN102286699 B CN 102286699B CN 201110232765 CN201110232765 CN 201110232765 CN 201110232765 A CN201110232765 A CN 201110232765A CN 102286699 B CN102286699 B CN 102286699B
- Authority
- CN
- China
- Prior art keywords
- steel
- carry out
- control
- corrosion
- per minute
- 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
- Heat Treatment Of Sheet Steel (AREA)
Abstract
The invention relates to steel capable of being subjected to rapid impact molding for a cell shell and a preparation method thereof. The steel comprises the components in percentage by weight: 0.0001-0.0050% of C, 0.10-0.20% of Mn, 0.010-0.050% of Al, 0.0001-0.0040% of N, 0.010-0.030% of Nb, not more than 0.020% of P, not more than 0.015% of S, not more than 0.05% of Cu, not more than 0.05% of Ni, not more than 0.08% of Cr, not more than 0.05% of Mo and not more than 0.020% of Si. The preparation method comprises the steps: smelting according to a pure steel process and carrying out continuous casting to obtain a blank; heating the continuous cast blank; carrying out rough rolling; carrying out finish rolling in a single-phase austenite region; coiling; pickling; carrying out cold rolling; degreasing; annealing in a full-hydrogen bell-type furnace; and leveling for later use. The finished product obtained in the invention has stable mechanical properties, hardness being 90-100, tensile strength being not lower than 300 MPa, elongation percentage being not lower than 36% and yield ratio being not more than 0.6; the impact-molded cell shell is not easy to crack and has good drum body shape fixity; and the finished product has high corrosion resistance.
Description
Technical field
The present invention relates to battery case with steel and preparation method, specifically belong to quick stamping forming battery case with steel and preparation method.
Background technology
Dry type battery and TunePower shell mainly adopt Presser Dashing refrigeration strip rolling to form, the battery case product must not have the defectives such as crackle, trachoma, snow, and require the plane isotropy good and anti-in press to become, battery case has high cleanliness, high ductibility, great surface quality, low Δ r value with the requirement of steel band material, does not produce cracking, snowflake spot defect when shaping.
Before nineteen ninety, the whole imports of high tension battery, the domestic high tension battery production line of in succession having introduced after nineteen ninety, battery production factory cold-rolled steel strip used are mainly from Japan, Korea S's import.Due to the import high precision that battery case is used, super deep-draw cold-rolled steel strip price, and consumption is larger, thereby make production cost increase, realize that raw-material production domesticization is inexorable trend.
Before the present invention, there is Granted publication number to be CN1174109C " Tagger steel strip for battery casing and manufacture method thereof ", this patent adopts Ultra-low carbon Ti-Nb-IF steel to produce the battery case steel, technical process is desulfurizing iron, bessemerize, RH vacuum-treat, continuous casting, hot rolling, batch, pickling, cold rolling, continuous annealing, slitting and oiling packing, for reaching gap-free atom (IF) state, adopt the compound interpolation of Ti, Nb to process fixation of C, N interstitial atom, make C and Nb be combined into NbC, N and Ti are combined into TiN; But in steel, Al participates in the fixing of N interstitial atom, the Ti alloy adds more, bad control, production cost is higher, and in-plane anisotropy (Δ r value) is larger, and superfluous Ti, Nb amount too highly can be brought disadvantageous effect to the finished steel plate deep drawability on the contrary, this patent does not have smooth operation simultaneously, can't eliminate or alleviate the slight surface imperfection that upper operation produces, can't accurately control the desired roughness of user and plate shape, be difficult to improve the sticking power of battery case coating.Granted publication number be CNl00560770C's " the good battery case of plane isotropy with steel and manufacture method thereof ", this patent adopts aluminium killed steel to produce battery case steel, and technical process is concise after hot metal pretreatment, converter smelting, stove, hot rolling, pickling, cold rolling, cover annealing, finishing finished product volume; But carbon content is higher, C exists with the form of interstitial atom and cementite in material, the plasticity variation can produce a large amount of cementites and separate out at crystal boundary, and inclusion is more, easily ftracture during punch process, deep drawability is descended, affect visual appearance and the use of battery case, production efficiency is low, simultaneously have interstitial atom C in material, ageing resistance is also poor.
Summary of the invention
The object of the invention is to overcome the deficiency of present existence, provide a kind of and can not only satisfy the High-speed machining processability, good corrosion resistance, and finished product thickness is 0.20～0.35mm, and hardness value (HV) is 90～100, tensile strength 〉=300MPa, unit elongation 〉=36%, yield tensile ratio≤0.6, pickling time lag (PL)≤1 second, in-plane anisotropy | Δ r|≤0.3, and the low corrosion-resistant battery shell that rushes fast per minute 〉=150 of production cost is with steel and preparation method.
Realize the technical measures of above-mentioned purpose:
Rush the corrosion-resistant battery shell steel of fast per minute 〉=150, its component and weight percent are: C:0.0001～0.0050%, Mn:0.10～0.20%, Al:0.010～0.050%, N:0.0001～0.0040%, Nb:0.010～0.030%, and control: P≤0.020%, S≤0.015%, Cu≤0.05%, Ni≤0.05%, Cr≤0.08%, Mo≤0.05%, Si≤0.020%, all the other are Fe and inevitable impurity.
It is characterized in that: the weight percent of C is 0.0008～0.0025%.
Preparation is rushed the corrosion-resistant battery shell of fast per minute 〉=150 with the method for steel, its step:
1) smelting also according to the technique of Clean Steel, continuous casting becomes base;
2) continuously cast bloom is heated to 1170～1230 ℃;
3) carry out roughing, and control the roughing temperature out at 1060～1100 ℃;
4) carry out essence in single-phase austenitic area and prick, and control finishing temperature at 900～940 ℃, the accumulative total draft is 90～95%;
5) batch, coiling temperature is controlled at 630～670 ℃;
6) carry out conventional pickling;
7) carry out cold rollingly, control the accumulative total draft 80～90%;
8) carry out conventional degreasing;
9) anneal in Full Hydrogen Bell Type Annealing Furnace, control annealing temperature at 620～700 ℃;
10) smooth and stand-by.
Each chemical element moiety control principle is as follows:
C is one of element of indispensable raising steel strength in steel, along with the increase of carbon content, and Fe in steel
3C increases, and cold working (punching press, drawing) and welding property degenerate.Cementite is negative electrode with respect to carbon steel (matrix is ferrite), when the carbon amount increases, has increased negative electrode quantity and area, and correspondingly its corrosion current has increased, and causes its erosion resistance to reduce.For super deep-draw steel, it is low that carbon content requires, and along with the reduction of carbon content in steel, every processability index of steel plate improves rapidly.Without ageing be senior deep-draw with the key character of steel.Therefore for guaranteeing high anti-corrosion, deep drawing quality and without ageing, the control carbon content is 0.0001～0.0050%.
Si in base material is remarkable on the solidity to corrosion impact, and solidity to corrosion descends with the rising of Si content, and therefore, Si is in the present invention as control element.Higher than 0.020% the time, easily generating the iron scale of difficult pickling when Si content, make the plate surface quality variation, therefore, is high anti-corrosion and the great surface quality that guarantees base material, thus to Si content be strict controlled in≤0.020%.
Mn in the present invention can reinforced ferrite, increases the hardness of base material, in addition, adds manganese can prevent that sulphur from causing the embrittlement of steel in steel.But the content of raw sheet Mn is higher, and the erosion resistance of base material descends and be unfavorable to punch process.Therefore, Mn content is controlled to be 0.10～0.20%.
For steel, the content of phosphorus is preferably low as far as possible for the battery case that requires to have good corrosion resistance, because segregation easily occurs phosphorus, and causes corrosion resisting property to reduce.Therefore, in the present invention P content be strict controlled in≤0.020%.
In general, the content of sulphur is that less solidity to corrosion is better.In steel, the segregation of S tendency is large, and it is necessary taking off S.Therefore, S content be strict controlled in≤0.015%.
Adopt aluminium deoxidation, remove the oxygen that is dissolved in when smelting in molten steel.In steel, can form sour molten aluminium (Als) adding of Al, and Als comprises solid solution aluminium and AlN, and the AlN particle of disperse can stop growing up of austenite crystal, crystal grain thinning.Solid solution N causes the finished product timeliness, and aluminium can suppress the solid solution of nitrogen, eliminates strain aging.But along with the increase of Als, the amount of inclusions in steel increases, and inclusion size also will become greatly, will cause the solidity to corrosion variation of base material.Therefore, Al content is defined as 0.010～0.050%.
Solid solution N is the major cause that causes the finished product timeliness, and particularly for the strain aging effect after smooth, the impact of nitrogen is especially large, increase along with N content in steel, to cause its pressworkability to degenerate (descending as n, r value), therefore, N be determined 0.0001～0.0040%.
For reaching gap-free atom (IF) state, must fixation of C, the N interstitial atom, the present invention adopts Nb to add and processes.Therefore, Nb content is 0.010～0.030%.
The present invention has advantages of following outstanding:
1, finished product stable mechanical property of the present invention, chemical composition by the appropriate design steel, optimize the processing parameters such as hot rolling and cold rolling hood type furnace annealing, hardness value (HV) is 90～100, tensile strength 〉=300MPa, unit elongation 〉=36%, yield tensile ratio≤0.6, the punching battery case is difficult for breaking, and stack shell shape stationarity is good.
2, the present invention adopts Nb fixed interval (FI) C, N atom, in-plane anisotropy | Δ r|≤0.3.
3, finished product solidity to corrosion of the present invention is high.Chemical composition by the appropriate design steel, the ladle slag upgrading, molten steel calcium is processed, converter tapping control oxygen, the RH vacuum-treat, high efficiency continuous casting prevents nitrogen pick-up, controls the content of residual element, make nitrogen in steel content≤30ppm, make inclusion size≤10 μ tm, make the pickling time lag value (PL) of substrate less than 1.5 seconds, solidity to corrosion is better than similar products at home and abroad.
Embodiment
Below the invention will be further described:
Embodiment 1
Rush the corrosion-resistant battery shell steel of fast per minute 〉=150, its component and weight percent are: C:0.0001%, Mn:0.10%, Al:0.010%, N:0.0040%, Nb:0.030%, and control: P:0.020%, S:0.014%, Cu:0.04%, Ni:0.05%, Cr:0.07%, Mo:0.04%, Si:0.018%, all the other are Fe and inevitable impurity.
Preparation is rushed the corrosion-resistant battery shell of fast per minute 〉=150 with the method for steel, its step:
1) smelting also according to the technique of Clean Steel, continuous casting becomes base;
2) continuously cast bloom is heated to 1170～1180 ℃;
3) carry out roughing, and control the roughing temperature out at 1060～1070 ℃;
4) carry out essence in single-phase austenitic area and prick, and control finishing temperature at 900～910 ℃, the accumulative total draft is 90%;
5) batch, coiling temperature is controlled at 630～640 ℃;
6) carry out conventional pickling;
7) carry out cold rollingly, control the accumulative total draft 80%;
8) carry out conventional degreasing;
9) anneal in Full Hydrogen Bell Type Annealing Furnace, control annealing temperature at 620～630 ℃;
10) smooth and stand-by.
Embodiment 2
Rush the corrosion-resistant battery shell steel of fast per minute 〉=150, its component and weight percent are: C:0.0005%, Mn:0.12%, Al:0.022%, N:0.0001%, Nb:0.023%, and control: P:0.019%, S:0.015%, Cu:0.03%, Ni:0.04%, Cr:0.08%, Mo:0.05%, Si:0.017%, all the other are Fe and inevitable impurity.
Preparation is rushed the corrosion-resistant battery shell of fast per minute 〉=150 with the method for steel, its step:
1) smelting also according to the technique of Clean Steel, continuous casting becomes base;
2) continuously cast bloom is heated to 1190～1200 ℃;
3) carry out roughing, and control the roughing temperature out at 1075～1085 ℃;
4) carry out essence in single-phase austenitic area and prick, and control finishing temperature at 905～915 ℃, the accumulative total draft is 90%;
5) batch, coiling temperature is controlled at 640～650 ℃;
6) carry out conventional pickling;
7) carry out cold rollingly, control the accumulative total draft 82%;
8) carry out conventional degreasing;
9) anneal in Full Hydrogen Bell Type Annealing Furnace, control annealing temperature at 630～640 ℃;
10) smooth and stand-by.
Embodiment 3
Rush the corrosion-resistant battery shell steel of fast per minute 〉=150, its component and weight percent are: C:0.0009%, Mn:0.20%, Al:0.050%, N:0.0010%, Nb:0.010%, and control: P:0.018%, S:0.014%, Cu:0.05%, Ni:0.03%, Cr:0.06%, Mo:0.03%, Si:0.020%, all the other are Fe and inevitable impurity.
Preparation is rushed the corrosion-resistant battery shell of fast per minute 〉=150 with the method for steel, its step:
1) smelting also according to the technique of Clean Steel, continuous casting becomes base;
2) continuously cast bloom is heated to 1195～1205 ℃;
3) carry out roughing, and control the roughing temperature out at 1080～1090 ℃;
4) carry out essence in single-phase austenitic area and prick, and control finishing temperature at 915～925 ℃, the accumulative total draft is 95%;
5) batch, coiling temperature is controlled at 650～660 ℃;
6) carry out conventional pickling;
7) carry out cold rollingly, control the accumulative total draft 85%;
8) carry out conventional degreasing;
9) anneal in Full Hydrogen Bell Type Annealing Furnace, control annealing temperature at 640～650 ℃;
10) smooth and stand-by.
Embodiment 4
Rush the corrosion-resistant battery shell steel of fast per minute 〉=150, its component and weight percent are: C:0.0025%, Mn:0.18%, Al:0.038%, N:0.0025%, Nb:0.015%, and control: P:0.018%, S:0.014%, Cu:0.02%, Ni:0.03%, Cr:0.06%, Mo:0.02%, Si:0.015%, all the other are Fe and inevitable impurity.
Preparation is rushed the corrosion-resistant battery shell of fast per minute 〉=150 with the method for steel, its step:
1) smelting also according to the technique of Clean Steel, continuous casting becomes base;
2) continuously cast bloom is heated to 1205～1215 ℃;
3) carry out roughing, and control the roughing temperature out at 1090～1100 ℃;
4) carry out essence in single-phase austenitic area and prick, and control finishing temperature at 930～940 ℃, the accumulative total draft is 95%;
5) batch, coiling temperature is controlled at 660～670 ℃;
6) carry out conventional pickling;
7) carry out cold rollingly, control the accumulative total draft 90%;
8) carry out conventional degreasing;
9) anneal in Full Hydrogen Bell Type Annealing Furnace, control annealing temperature at 670～680 ℃;
10) smooth and stand-by.
Embodiment 5
Rush the corrosion-resistant battery shell steel of fast per minute 〉=150, its component and weight percent are: C:0.0050%, Mn:0.20%, Al:0.049%, N:0.0040%, Nb:0.010%, and control: P:0.018%, S:0.014%, Cu:0.02%, Ni:0.03%, Cr:0.05%, Mo:0.02%, Si:0.012%, all the other are Fe and inevitable impurity.
Preparation is rushed the corrosion-resistant battery shell of fast per minute 〉=150 with the method for steel, its step:
1) smelting also according to the technique of Clean Steel, continuous casting becomes base;
2) continuously cast bloom is heated to 1220～1230 ℃;
3) carry out roughing, and control the roughing temperature out at 1075～1085 ℃;
4) carry out essence in single-phase austenitic area and prick, and control finishing temperature at 935～940 ℃, the accumulative total draft is 95%;
5) batch, coiling temperature is controlled at 660～670 ℃;
6) carry out conventional pickling;
7) carry out cold rollingly, control the accumulative total draft 90%;
8) carry out conventional degreasing;
9) anneal in Full Hydrogen Bell Type Annealing Furnace, control annealing temperature at 690～700 ℃;
10) smooth and stand-by.
Table 1 is the Performance Detection table of each embodiment.
The performance of each embodiment of table 1
As can be seen from Table 1, hardness value of the present invention (HV) is 90～100, tensile strength 〉=300MPa, unit elongation 〉=36%, yield tensile ratio≤0.6, pickling time lag (PL) was less than 1.5 seconds, in-plane anisotropy | Δ r|≤0.3, the punching battery case is difficult for breaking, and stack shell shape stationarity is good, compared with prior art, has outstanding substantive distinguishing features.
Claims (2)
1. rush the corrosion-resistant battery shell steel of fast per minute 〉=150, its component and weight percent are: C:0.0001%, Mn:0.10 ~ 0.12%, Al:0.022 ~ 0.038%, N:0.0001 ~ 0.001%, Nb:0.030%, and control: P≤0.020%, S≤0.015%, Cu≤0.05%, Ni≤0.05%, Cr≤0.08%, Mo≤0.05%, Si≤0.020%, all the other are Fe and inevitable impurity.
2. prepare the fast per minute of the punching claimed in claim 1 〉=corrosion-resistant battery shell of 150 method of steel, its step:
1) smelting also according to the technique of Clean Steel, continuous casting becomes base;
2) continuously cast bloom is heated to 1170 ~ 1230 ℃;
3) carry out roughing, and control the roughing temperature out at 1060 ~ 1100 ℃;
4) carry out finish rolling in single-phase austenitic area, and control finishing temperature at 900 ~ 940 ℃, the accumulative total draft is 90 ~ 95%;
5) batch, coiling temperature is controlled at 630 ~ 670 ℃;
6) carry out conventional pickling;
7) carry out cold rollingly, control the accumulative total draft 80 ~ 90%;
8) carry out conventional degreasing;
9) anneal in Full Hydrogen Bell Type Annealing Furnace, control annealing temperature at 620 ~ 690 ℃;
10) smooth and stand-by.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110232765 CN102286699B (en) | 2011-08-15 | 2011-08-15 | Corrosion-resistant steel with impact molding rate not smaller than 150 per minute for cell shell and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110232765 CN102286699B (en) | 2011-08-15 | 2011-08-15 | Corrosion-resistant steel with impact molding rate not smaller than 150 per minute for cell shell and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102286699A CN102286699A (en) | 2011-12-21 |
| CN102286699B true CN102286699B (en) | 2013-11-06 |
Family
ID=45333452
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110232765 Expired - Fee Related CN102286699B (en) | 2011-08-15 | 2011-08-15 | Corrosion-resistant steel with impact molding rate not smaller than 150 per minute for cell shell and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102286699B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103337600B (en) * | 2013-05-18 | 2016-02-17 | 宁波倍特瑞能源科技有限公司 | A kind of alkaline dry battery positive pole housing and alkaline dry battery |
| CN104928573B (en) * | 2015-07-02 | 2017-03-01 | 首钢总公司 | The control method of gap-free atom steel cleanness |
| CN106148803B (en) * | 2016-08-30 | 2017-11-24 | 唐山钢铁集团有限责任公司 | A kind of production method of deep-draw battery case steel |
| CN107177731A (en) * | 2017-05-18 | 2017-09-19 | 永鑫精密材料（无锡）有限公司 | A kind of charging battery jar deep-draw cold-rolled strip and its preparation method and application |
| KR102045654B1 (en) * | 2017-12-26 | 2019-11-15 | 주식회사 포스코 | Cold rolled steel sheet having excellent high temperature mechanical properties as well as room temperature workability and method of manufacturing the same |
| CN108346759A (en) * | 2017-12-28 | 2018-07-31 | 江苏海德森能源有限公司 | A kind of lithium battery of high intensity and preparation method thereof |
| CN113774274B (en) * | 2021-08-05 | 2022-08-23 | 武汉钢铁有限公司 | Low-cost well-formed battery case steel and production method thereof |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3861931B2 (en) * | 1996-08-19 | 2006-12-27 | Ｊｆｅスチール株式会社 | Manufacturing method of steel plate for cans |
| CN1174109C (en) * | 2002-09-20 | 2004-11-03 | 武汉钢铁(集团)公司 | Tagger steel strip for battery casing, and producing method thereof |
| CN101082107B (en) * | 2007-06-29 | 2010-06-16 | 武汉钢铁(集团)公司 | Ultra-low carbon cold-rolling deep-punching glassed steel and method of production |
| CN101481778B (en) * | 2008-01-07 | 2010-12-01 | 宝山钢铁股份有限公司 | Austenic stainless steel strip and manufacturing method thereof |
-
2011
- 2011-08-15 CN CN 201110232765 patent/CN102286699B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN102286699A (en) | 2011-12-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102286699B (en) | Corrosion-resistant steel with impact molding rate not smaller than 150 per minute for cell shell and preparation method thereof | |
| CN109628846B (en) | 1300 MPa-grade ultrahigh-strength cold-rolled steel plate for automobiles and production method thereof | |
| CN102416404B (en) | Method for producing cold-rolled steel strips | |
| CN101643828B (en) | Production method of anti-aging tinning black plate | |
| CN100560770C (en) | Battery case steel and manufacture method thereof that the plane isotropy is good | |
| CN110284070B (en) | 260 MPa-level hot-rolled acid-washed enamel steel and production method thereof | |
| CN109136444A (en) | Quickly, the new energy car battery shell steel and production method of punch process is thinned | |
| CN101275196B (en) | Steel for seamless tin and manufacturing method thereof | |
| CN103276299A (en) | High-surface quality ferrite stainless steel plate and manufacturing method thereof | |
| CN103469062A (en) | Isotropic cold-rolled soft tinned plate and production method thereof | |
| CN105925896B (en) | A kind of high plasticity hot-rolled steel plate of 1000MPa grade high-strengths and its manufacture method | |
| CN102719738A (en) | Thin-specification hard tinning raw plate and manufacturing method thereof | |
| CN113774274B (en) | Low-cost well-formed battery case steel and production method thereof | |
| CN102234736A (en) | Secondary cold-rolled high-hardness stamping steel with high isotropy and manufacturing method thereof | |
| CN102943211B (en) | A kind of manufacture method of high carbon martensite Stainless Steel Band | |
| CN103205653A (en) | Duplex stainless steel with excellent thermoplasticity and corrosion resistance and manufacturing method thereof | |
| CN102912227A (en) | Soft tinning raw steel plate and manufacturing method thereof | |
| CN110714165B (en) | Cold-rolled sheet for 320 MPa-level household appliance panel and production method thereof | |
| CN114480972A (en) | Thin-specification Ni-free weathering steel produced based on CSP process and production method thereof | |
| CN110629000A (en) | Cold-rolled hot-dip galvanized steel sheet with yield strength of 280MPa and manufacturing method thereof | |
| CN105256225A (en) | Cold-rolled steel plate for elevator and preparation method for cold-rolled steel plate | |
| CN101864534A (en) | Soft tin plate produced by using continuous annealing mode | |
| CN104651715A (en) | Cold-rolled steel plate, preparation method of cold-rolled steel plate, hot-dip galvanized steel plate, and preparation method of hot-dip galvanized steel plate | |
| CN102796955A (en) | Hot-rolled medium and thick plates for enamel steel and manufacturing method for hot-rolled medium and thick plates | |
| CN111926252B (en) | Hot-rolled pickled steel plate for deep drawing and production method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131106 Termination date: 20170815 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |