CN109322666A - A kind of sandwiched gradient distribution diadust strengthened pick - Google Patents
A kind of sandwiched gradient distribution diadust strengthened pick Download PDFInfo
- Publication number
- CN109322666A CN109322666A CN201811510377.6A CN201811510377A CN109322666A CN 109322666 A CN109322666 A CN 109322666A CN 201811510377 A CN201811510377 A CN 201811510377A CN 109322666 A CN109322666 A CN 109322666A
- Authority
- CN
- China
- Prior art keywords
- diadust
- cutting pick
- pick
- cutting
- handle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000009826 distribution Methods 0.000 title claims abstract description 13
- 238000005520 cutting process Methods 0.000 claims abstract description 64
- 239000010432 diamond Substances 0.000 claims abstract description 26
- 229910003460 diamond Inorganic materials 0.000 claims abstract description 26
- 239000000463 material Substances 0.000 claims abstract description 24
- 238000005728 strengthening Methods 0.000 claims abstract description 20
- 229910017052 cobalt Inorganic materials 0.000 claims abstract description 9
- 239000010941 cobalt Substances 0.000 claims abstract description 9
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims abstract description 9
- 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 description 17
- 238000000034 method Methods 0.000 claims description 11
- 239000000843 powder Substances 0.000 claims description 8
- 238000003466 welding Methods 0.000 claims description 7
- 238000005219 brazing Methods 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 239000010949 copper Substances 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 229910052709 silver Inorganic materials 0.000 claims description 2
- 239000004332 silver Substances 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims 1
- 239000011435 rock Substances 0.000 abstract description 18
- 229910045601 alloy Inorganic materials 0.000 abstract description 16
- 239000000956 alloy Substances 0.000 abstract description 16
- 238000005299 abrasion Methods 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000005452 bending Methods 0.000 abstract description 3
- 230000002028 premature Effects 0.000 abstract description 3
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 3
- 229910001315 Tool steel Inorganic materials 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 230000005641 tunneling Effects 0.000 description 2
- 201000011180 Dental Pulp Calcification Diseases 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 238000009440 infrastructure construction Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- VIKNJXKGJWUCNN-XGXHKTLJSA-N norethisterone Chemical compound O=C1CC[C@@H]2[C@H]3CC[C@](C)([C@](CC4)(O)C#C)[C@@H]4[C@@H]3CCC2=C1 VIKNJXKGJWUCNN-XGXHKTLJSA-N 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
- E21C35/18—Mining picks; Holders therefor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
- E21B10/54—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of the rotary drag type, e.g. fork-type bits
- E21B10/55—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of the rotary drag type, e.g. fork-type bits with preformed cutting elements
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
- E21C35/18—Mining picks; Holders therefor
- E21C35/183—Mining picks; Holders therefor with inserts or layers of wear-resisting material
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
- E21C35/18—Mining picks; Holders therefor
- E21C35/183—Mining picks; Holders therefor with inserts or layers of wear-resisting material
- E21C35/1835—Chemical composition or specific material
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/10—Making by using boring or cutting machines
- E21D9/1006—Making by using boring or cutting machines with rotary cutting tools
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a kind of sandwiched gradient distribution diadust strengthened picks, including cutting pick head and cutting pick handle, cutting pick head to be embedded on cutting pick handle；When work, it is directly contacted by diadust strengthening layer and rock, pass through diadust rock cutting, grinding carcass achievees the effect that the continuous exposure of diadust from sharp, using the concentration of cobalt, gradient increases the hard alloy sandwich of variation in proportion for the inside of cutting pick head, as the concentration of cobalt increases its bending strength height, to enhance the toughness of entire cutting pick head, prevent the accident of fractureing, cutting pick handle welding-on has the gauge item of diamond cast body or polycrystalline diamond material, and cutting pick handle is prevented when work to cause cutting pick head to fail with rock contact premature abrasion.The present invention can be tunneled effectively in hard formation, while reduce the rate of wear of pick, extend the service life of pick, improved the working efficiency in actual production, reduced cost.
Description
Technical field
The invention belongs to the fields such as tunnel piercing excavation, coal mining, and in particular to a kind of sandwiched gradient distribution Buddha's warrior attendant
Stone micro mist strengthened pick.
Background technique
With the rapid development of infrastructure construction and gradually increasing for energy demand, engineering equipment to driving detritus and
Material requirement also increasingly increases, and especially as the pick of cutting rock stratum key tool, intensity and wearability are all urgently
Wait improve.
Material of the hard alloy pick as driving detritus is generallyd use both at home and abroad at present, with hard abrasion ore-rock layer
Increase, the shortcomings that hard alloy pick is also increasingly prominent, and on the one hand it wears no resistance, and the serious wear when tunneling hard rock is another
Its shock resistance of aspect is poor, easily collapses tooth, frangibility.These problems substantially reduce the service life of hard alloy pick, cause to apply
Pick is frequently replaced during work.
Diamond by its high hardness and wearability in engineering detritus field extensive application, but its toughness
Low, heat-resisting quantity is insufficient, it is difficult to adapt to the severe operating condition such as cutting.It is therefore desirable to be furtherd investigate, propose a kind of new
Cutting tooth structure can give full play to the performance advantage of diamond, and cutting technology is enable preferably to be used in hard rock driving
In field.
Summary of the invention
It is an object of the invention to generally use hard alloy pick both at home and abroad in above-mentioned existing background technique at present
As the material of driving detritus, on the one hand wearing no resistance, the serious wear when tunneling hard rock, another aspect shock resistance is poor,
Tooth easily is collapsed, frangibility substantially reduces the service life of hard alloy pick, and pick in work progress is caused frequently to be replaced, it is difficult to full
The problems such as needs of sufficient hard rock driving, provides a kind of sandwiched gradient distribution diadust strengthened pick.
A kind of sandwiched gradient distribution diadust strengthened pick, including cutting pick head and cutting pick handle, cutting pick head are embedded in
On cutting pick handle, the cutting pick head is made of diadust strengthening layer, sandwich and pedestal, and diadust strengthening layer uses Buddha's warrior attendant
The impregnated body material of stone, sandwich and pedestal use cemented carbide material, and diadust strengthening layer wraps up sandwich, it is whole again with pedestal
Be connected, be combined as a whole by powder sintered realizations three parts, form complete cutting pick head, the cutting pick handle be by gauge item with
Rigid body composition, rigid body use Steel material, and gauge item uses diamond cast sintered body or polycrystalline diamond material, and gauge item is symmetrical
It is evenly distributed on the top of rigid body；
By diamond concentration, gradient becomes diamond cast body material used by the diadust strengthening layer in proportion
Change and realizes；
Cemented carbide material used by the sandwich by the concentration of cobalt, realize in proportion by change of gradient.
The cutting pick head connects to form complete pick by high frequency welding method with cutting pick handle, welding layer be silver brazing layer or
Copper brazing layer；
The working principle of the invention and process:
It when work, is directly contacted by diadust strengthening layer and rock, by diadust rock cutting, grinds tire
Body achievees the effect that the continuous exposure of diadust from sharp, and gradient increases change in proportion using the concentration of cobalt for the inside of cutting pick head
The hard alloy sandwich of change, to enhance the toughness of entire cutting pick head, is prevented as the concentration of cobalt increases its bending strength height
Fracture accident, and cutting pick handle welding-on has the gauge item of diamond cast body or polycrystalline diamond material, pick when preventing work
Handle causes cutting pick head to fail with rock contact premature abrasion.
Beneficial effects of the present invention:
The present invention is micro- using diamond in the working portion of pick and rock contact with diadust strengthened pick material
Powder strengthening layer gives full play to the high rigidity and high-wearing feature of diamond, is conducive to the driving of hard rock, reduces the abrasion of denticle,
Using the concentration of cobalt, gradient increases the hard alloy sandwich of variation in proportion inside pick, and hardness is small, and bending resistance is strong, solves
The problem of diamond pick poor toughness, frangibility.So as to effectively tunnel in hard formation, while reducing the mill of pick
Speed is damaged, extends the service life of pick, and cutting pick handle welding-on has the gauge item of diamond cast body or polycrystalline diamond material, is prevented
Cutting pick handle and rock contact premature abrasion lead to cut tooth losing efficiency when only working, and improve the working efficiency in actual production, reduce at
This.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of cutting pick head of the present invention；
Fig. 2 is the schematic diagram of pick handle structure of the present invention；
Fig. 3 is structural schematic diagram of the invention；
Fig. 4 is the structure sectional view of cutting pick head of the present invention；
Fig. 5 is the cross-sectional view of pick handle structure of the present invention；
Fig. 6 is cross-sectional view of the invention；
Specific embodiment 1: being suitable for the rock that compression strength is 70MPa-90MPa
It please refers to shown in Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5 and Fig. 6:
A kind of sandwiched gradient distribution diadust strengthened pick, it is characterised in that: including cutting pick head 1 and cutting pick handle 2,
Cutting pick head 1 is embedded on cutting pick handle 2, and the cutting pick head 1 is made of diadust strengthening layer 11, sandwich 12 and pedestal 13, gold
Hard rock micro mist strengthening layer 11 uses diamond cast body material, and sandwich 12 and pedestal 13 use cemented carbide material, and diamond is micro-
Powder strengthening layer 11 wraps up sandwich 12, whole to be connected again with pedestal 13, is combined as a whole by powder sintered realization three parts, shape
At complete cutting pick head 1, the cutting pick handle 2 is made of gauge item 21 and rigid body 22, and rigid body uses Steel material, and gauge item 21 uses
Diamond cast sintered body or polycrystalline diamond material, gauge item 21 are symmetrically and evenly distributed in the top of rigid body 22；
Cutting pick head 1 includes diadust strengthening layer 11, sandwich 12 and pedestal 13, and diameter is 25 millimeters, and tooth is 41 millimeters high,
11 22 millimeters of height of diadust strengthening layer, 12 29 millimeters of height of sandwich, 10 millimeters of diameter, cutting pick handle 2 includes gauge item 21
With rigid body 22, gauge item 21 is 15 millimeters long, 4 millimeters wide, 2 millimeters thick, and 22 high 134 millimeters of rigid body, 65 millimeters of maximum gauge, soldering
1 millimeter of thickness degree；
Diadust strengthening layer 11 using hard alloy wrap up 200 mesh diadust, from tooth tip 111 to pedestal
The part of 13 contacts is divided into four layers, and the mass percent of diadust is respectively 10%, 8%, 6% and 4% from top to bottom；
Sandwich 12 uses hard alloy, is divided into three layers from outside to inside according to radial, the mass percent of cobalt in hard alloy
Respectively 10%, 12% and 14%；
Pedestal 13 uses hard alloy；
Gauge item 21 uses polycrystalline diamond, and rigid body 22 uses high-quality tool steel；
Cutting pick head 1 is made according to the above ratio using powder sintered method when preparation, by 21 welding-on of gauge item to rigid body 22
Then cutting pick head 1 is attached with cutting pick handle 2 using the method for high-frequency welding by upper production cutting pick handle 2.
Specific embodiment 2: being suitable for the rock that compression strength is 90MPa-12 0MPa
It please refers to shown in Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5 and Fig. 6:
A kind of sandwiched gradient distribution diadust strengthened pick, cutting pick head 1 include diadust strengthening layer 11, folder
Core 12 and pedestal 13, diameter are 30 millimeters, and tooth is 40 millimeters high, 11 22 millimeters of height of diadust strengthening layer, 12 height of sandwich
28 millimeters, 15 millimeters of diameter, cutting pick handle 2 includes gauge item 21 and rigid body 22, and gauge item 21 is 8 millimeters long, 4 millimeters wide, 2 milli of thickness
Rice, 22 high 134 millimeters of rigid body, 65 millimeters of maximum gauge, 1 millimeter of brazing layer thickness；
Diadust strengthening layer 11 using hard alloy wrap up 325 mesh diadust, from tooth tip 111 to pedestal
The part of 13 contacts is divided into four layers, and the mass percent of diadust is respectively 8%, 6%, 4% and 2% from top to bottom；
Sandwich 12 uses hard alloy, is divided into three layers from outside to inside according to radial, the mass percent of cobalt in hard alloy
Respectively 10%, 13% and 16%；
Pedestal 13 uses hard alloy；
Gauge item 21 uses impregnated diamond sinter material, and rigid body 22 uses high-quality tool steel；
Cutting pick head 1 is made according to the above ratio using powder sintered method when preparation, by 21 welding-on of gauge item to rigid body 22
Then cutting pick head 1 is attached with cutting pick handle 2 using the method for high-frequency welding by upper production cutting pick handle 2.
Claims (5)
1. a kind of sandwiched gradient distribution diadust strengthened pick, it is characterised in that: including cutting pick head (1) and cutting pick handle
(2), cutting pick head (1) is embedded on cutting pick handle (2), the cutting pick head (1) by diadust strengthening layer (11), sandwich (12) and
Pedestal (13) composition, diadust strengthening layer (11) use diamond cast body material, and sandwich (12) and pedestal (13) use
Cemented carbide material, diadust strengthening layer (11) wrap up sandwich (12), whole to be connected again with pedestal (13), are burnt by powder
Solid existing three parts are combined as a whole, and are formed complete cutting pick head (1), the cutting pick handle (2) is by gauge item (21) and rigid body
(22) it forms, rigid body uses Steel material, and gauge item uses diamond cast sintered body or polycrystalline diamond material, gauge item (21)
Symmetrically and evenly it is distributed in the top of rigid body (22).
2. a kind of sandwiched gradient distribution diadust strengthened pick according to claim 1, it is characterised in that: described
Diamond cast body material used by diadust strengthening layer (11) by diamond concentration, realize in proportion by change of gradient.
3. a kind of sandwiched gradient distribution diadust strengthened pick according to claim 1, it is characterised in that: described
Cemented carbide material used by sandwich (12) by the concentration of cobalt, realize in proportion by change of gradient.
4. a kind of sandwiched gradient distribution diadust strengthened pick according to claim 1, it is characterised in that: described
Cutting pick head (1) connects to form complete pick by high frequency welding method with cutting pick handle (2), and welding layer (3) is silver brazing layer or copper
Brazing layer.
5. a kind of sandwiched gradient distribution diadust strengthened pick according to claim 1, it is characterised in that: preparation
Shi Liyong powder sintered method makes cutting pick head (1) according to the above ratio, will make on gauge item (21) welding-on to rigid body (22)
Cutting pick head (1) is then attached with cutting pick handle (2) using the method for high-frequency welding by cutting pick handle (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811510377.6A CN109322666A (en) | 2018-12-11 | 2018-12-11 | A kind of sandwiched gradient distribution diadust strengthened pick |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811510377.6A CN109322666A (en) | 2018-12-11 | 2018-12-11 | A kind of sandwiched gradient distribution diadust strengthened pick |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109322666A true CN109322666A (en) | 2019-02-12 |
Family
ID=65256530
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811510377.6A Pending CN109322666A (en) | 2018-12-11 | 2018-12-11 | A kind of sandwiched gradient distribution diadust strengthened pick |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109322666A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112610160A (en) * | 2020-12-17 | 2021-04-06 | 同济大学 | Step-shaped composite sheet of CVD diamond layer-impregnated diamond layer-polycrystalline diamond composite sheet layer |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201221360Y (en) * | 2008-03-28 | 2009-04-15 | 湖南飞瑞复合材料有限责任公司 | High abrasion-proof diamond composite cutter bit |
| CN101446199A (en) * | 2008-12-31 | 2009-06-03 | 河南四方达超硬材料股份有限公司 | Impregnated diamond compact strong wear resistance pick and manufacture process thereof |
| CN102720434A (en) * | 2012-06-29 | 2012-10-10 | 河南晶锐超硬材料有限公司 | Polycrystalline diamond hard alloy composite sheet substrate, composite and preparation method |
| CN104712336A (en) * | 2015-03-26 | 2015-06-17 | 河南四方达超硬材料股份有限公司 | Composite cutting tooth made of polycrystalline diamond and hard alloy |
| CN204851252U (en) * | 2015-07-29 | 2015-12-09 | 桂林星钻超硬材料有限公司 | Polycrystalline diamond pick body with protect footpath and supplementary cutting power ability |
| US10105870B1 (en) * | 2012-10-19 | 2018-10-23 | The Sollami Company | Combination polycrystalline diamond bit and bit holder |
| EP3553271A1 (en) * | 2018-04-11 | 2019-10-16 | The Sollami Company | Diamond insert with heat transfer bore |
-
2018
- 2018-12-11 CN CN201811510377.6A patent/CN109322666A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201221360Y (en) * | 2008-03-28 | 2009-04-15 | 湖南飞瑞复合材料有限责任公司 | High abrasion-proof diamond composite cutter bit |
| CN101446199A (en) * | 2008-12-31 | 2009-06-03 | 河南四方达超硬材料股份有限公司 | Impregnated diamond compact strong wear resistance pick and manufacture process thereof |
| CN102720434A (en) * | 2012-06-29 | 2012-10-10 | 河南晶锐超硬材料有限公司 | Polycrystalline diamond hard alloy composite sheet substrate, composite and preparation method |
| US10105870B1 (en) * | 2012-10-19 | 2018-10-23 | The Sollami Company | Combination polycrystalline diamond bit and bit holder |
| CN104712336A (en) * | 2015-03-26 | 2015-06-17 | 河南四方达超硬材料股份有限公司 | Composite cutting tooth made of polycrystalline diamond and hard alloy |
| CN204851252U (en) * | 2015-07-29 | 2015-12-09 | 桂林星钻超硬材料有限公司 | Polycrystalline diamond pick body with protect footpath and supplementary cutting power ability |
| EP3553271A1 (en) * | 2018-04-11 | 2019-10-16 | The Sollami Company | Diamond insert with heat transfer bore |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112610160A (en) * | 2020-12-17 | 2021-04-06 | 同济大学 | Step-shaped composite sheet of CVD diamond layer-impregnated diamond layer-polycrystalline diamond composite sheet layer |
| CN112610160B (en) * | 2020-12-17 | 2022-04-05 | 同济大学 | Step-shaped composite sheet of CVD diamond layer-impregnated diamond layer-polycrystalline diamond composite sheet layer |
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
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Application publication date: 20190212 |