CN1258335A - Injection device and injection method - Google Patents
Injection device and injection method Download PDFInfo
- Publication number
- CN1258335A CN1258335A CN 98805206 CN98805206A CN1258335A CN 1258335 A CN1258335 A CN 1258335A CN 98805206 CN98805206 CN 98805206 CN 98805206 A CN98805206 A CN 98805206A CN 1258335 A CN1258335 A CN 1258335A
- Authority
- CN
- China
- Prior art keywords
- nozzle
- bysmalith
- hole
- seal
- boring
- 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
- 238000002347 injection Methods 0.000 title claims abstract description 29
- 239000007924 injection Substances 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims description 17
- 238000007789 sealing Methods 0.000 claims abstract description 25
- 239000008393 encapsulating agent Substances 0.000 claims description 13
- 239000007921 spray Substances 0.000 claims description 6
- 239000013536 elastomeric material Substances 0.000 claims description 5
- 239000011435 rock Substances 0.000 abstract description 20
- 230000005489 elastic deformation Effects 0.000 abstract description 2
- 239000003566 sealing material Substances 0.000 abstract 2
- 239000000565 sealant Substances 0.000 description 9
- 239000000463 material Substances 0.000 description 6
- 238000012856 packing Methods 0.000 description 6
- 238000004073 vulcanization Methods 0.000 description 6
- 239000004575 stone Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 241000209094 Oryza Species 0.000 description 2
- 235000007164 Oryza sativa Nutrition 0.000 description 2
- 239000011083 cement mortar Substances 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 235000009566 rice Nutrition 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 208000018672 Dilatation Diseases 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 239000003380 propellant Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/02—Setting anchoring-bolts with provisions for grouting
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/008—Anchoring or tensioning means
-
- 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
- E21D9/001—Improving soil or rock, e.g. by freezing; Injections
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Soil Sciences (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Working Measures On Existing Buildindgs (AREA)
- Fuel-Injection Apparatus (AREA)
- Piles And Underground Anchors (AREA)
Abstract
Cracks round a bore hole (19) are sealed while at the same time a rock bolt (20) is anchored in the bore hole by injecting a sealing material (23) through an injection nozzle. This comprises a sealing sleeve (10-14) with a through hole and a nonreturn valve device and is left in the bore hole after injection. The rock bolt (20) is inserted through the through hole of the valve nozzle and through the nonreturn valve device (16, 20). According to the invention, one sealing element of the non return valve device is formed of the rock bolt (20) and its other sealing element is formed of a sealing socket (16). This is pressed in a yielding and sealing manner against the rock bolt. The injection of the sealing material (23) is carried out through a gap (21) between the rock bolt and the sealing sleeve (10-14) and through the non return valve device (16, 20) during elastic deformation of the sealing socket (16).
Description
When in rock, building tunnel and stone chamber, must be with the rock fracture good seal, infiltration and the underground water that just can resist water sink, perhaps in the tunnel or the stone chamber be used to store or carry under the situation of fluid, stop escape of liquid.Common encapsulating method is with cement or other encapsulant, in plastics, injection shot borehole with high pressure.
There are several devices can carry out this injection now.Patent specification SE-B-413929 and corresponding text US-A-4260295 thereof disclose a kind of model machine.According to these two files, this model machine used a kind of can AEI After End of Injection lose contact with reality injection apparatus, stay boring in nozzle.A lippacking or an expansible sleeve made from elastomeric material are arranged on this nozzle, on the drill hole wall around it is close to hermetically, on the one hand can fixed nozzle, the injected material in the time of can guaranteeing to spray on the other hand between nozzle and drill hole wall does not leak.Therefore, sealing part or sleeve can make and keep high pressure in the course of injection in the boring.
When only being used for the rock crevice sealing, this prior-art devices effect is fine.But when building tunnel or stone chamber, bysmalith must be fixed on the crag under a lot of situations.Use after the described prior-art devices of above-mentioned patent specification seals, will be close to other another hole of boring of boring that is used to seal rock crevice.Unfortunately, water often taking place leak the interior phenomenon of into new boring, needs to spray again.If the hydraulic pressure around tunnel or the stone chamber in the rock is higher, and rock has many big and small cracks, and this problem will be obvious especially.In this case, must carry out injecting step repeatedly, reach enough tightnesses, will insert bysmalith in the boring, and need drying up to boring.After reaching drying, just can fix bysmalith, fixing means is that bysmalith is made expansion bolt (as described in US-A-4290515), perhaps earlier cement mortar is sprayed into boring, fills in bysmalith again.The step more complicated in back because bysmalith may be long in many cases, if rock fracture is many and stone matter is poor, needs 3-4 rice long usually.The increase of difficulty mainly is because the cement mortar amount that sprays into must so just can make the bysmalith of insertion reach complete filling on every side in strict conformity with the size of boring and bysmalith, can not extrude too much mortar outside the boring when filling in bysmalith simultaneously.
According to US-A-4289427,, once repaid and tried in boring, to insert a wirerope to substitute the method for bysmalith for addressing this problem.For this reason, used a kind of special type hawser, it is made by glass fiber, and the ventilating pipe of one or more longitudinal extensions is arranged.Hawser is rotation when inserting boring, makes boring zone on every side obtain sealing by the method that a circular seal dish is close on the crag simultaneously.With an injection apparatus sealant is sprayed into boring with high pressure.The insertion one side of sealant is by means of the rotation of hawser, on the other hand by means of the excess air that discharges by above-mentioned ventilating pipe in the boring.After sealant solidified, hawser promptly can be connected with the foundry goods of a kind of continuous concrete layer on the rock inboard, plays fixation.
Really, this prior art can be used for the fixing of hawser, but it is not suitable for the fixing of bysmalith.And because natural cause, rock surface is more coarse, so be difficult to the tightness that reaches desirable between sealing ring and adjacent rock surface.
Thereby, the object of the present invention is to provide a kind of can being fixed on one piece of bysmalith in the boring of crag, and spray into a kind of method of sealant simultaneously.
Another object of the present invention is to provide a kind of sealing of synchronously carrying out the fixing and rock of bysmalith to reach the method that the rock stratum is sealed by spraying into a kind of sealant.
Another object of the present invention is fixing by the sealing of synchronously carrying out the rock stratum and bysmalith to make the injection demand of a rock drop to minimum.
According to the present invention, these and other some purpose is respectively by realizing as independent claims 1 and 2 described method and apparatus.Dependent claims has specifically defined most preferred embodiments more of the present invention.
In a word, the notion that the present invention proposes is, by a nozzle encapsulant sprayed, and realizes synchronously sealing being implemented in the slit around the boring and bysmalith being fixed in the boring with this.Seal sleeve and a check valve apparatus of constituting a band through hole of nozzle, the AEI After End of Injection nozzle will be stayed in the boring.Bysmalith passes the through hole of valve nozzle and check valve apparatus and inserts.According to the present invention, a seal of check valve apparatus is formed by a bysmalith, and another seal is formed by a seal receptacle.The seal receptacle deformable ground is close on the bysmalith with sealing means.In seal receptacle elastic deformation process, encapsulant passes the gap between bysmalith and seal sleeve, passes check valve apparatus again and ejects.
Below two embodiment of method and device have as described herein been carried out more detailed explanation, please referring to following accompanying drawing:
Fig. 1 is the longitudinal plan of an embodiment of nozzle constructed in accordance;
What Fig. 2 showed is this nozzle synchronously carries out the fixing and propellant of bysmalith in boring injection;
Fig. 3 shows is another embodiment of nozzle as described herein.
The embodiment of creative injection apparatus shown in the figure is made of an elongate sleeve 10, and there is screw thread an end outside of this sleeve, and the other end and an outward flange 11 link together or integrator tightly.Tubular seal 12 slippages of being made by elastomeric material are to sleeve 10.Respectively there is one piece of packing ring 13 at sealing part two ends, and packing ring 13 preferably is connected on the end face of seal with fastening means.
Pressure swivel sleeve 15 is installed in sleeve 10 and is screwed between the nut 14 on the sleeve 10.Seal receptacle 16 is fixed on vulcanization process on the outer rim of flange 11 and (is fixed on the left side in Fig. 1).Seal receptacle is made by elastomeric material, has a through hole 17, and through hole has the internal diameter of the diameter of a part less than sleeve 10 at least.In the embodiment shown, the through hole 17 of seal receptacle is taper from the port of export and enlarges gradually, has formed the sealing flange 18 of two introversions in the through hole.The cross section of these sealing flanges not necessarily is semicircle shape, can be designed to inwardly outstanding seal lip.
When using this injection apparatus, should on crag, bore a hole 19 earlier.The diameter and the degree of depth of boring are satisfactory, are respectively about 64 millimeters and about 3-4 rice (all being so in this article usually).Then nozzle is inserted boring, the nut 14 of screwing on makes to expand outwardly behind sleeve 12 vertical pressurizeds, is close to hermetically on the petrosal foramen wall.Nut can be tightened with art methods, shown in the patent specification US-A-4260295 As mentioned above.If bore diameter is 64 millimeters, the external diameter of that root pipe 12 can be 57 millimeters.
After being fixed on nozzle in the boring 19 with the method, again bysmalith 12 being passed nozzle and insert.The diameter of bysmalith 20 should be less than the internal diameter of sleeve 10, so that stay next annular gap 21 between bysmalith and sleeve.In addition, the through hole 17 of seal receptacle 16 has a minimum diameter less than the bysmalith external diameter, and like this, seal receptacle 16 will be expanded in the process of inserting bysmalith, is close on the bysmalith hermetically.If seal receptacle 16 is made by elastomeric material, the diameter of bysmalith just should be 22 millimeters, and seal receptacle 16 the narrowest parts are exactly 20 millimeters.If the diameter of bysmalith 20 is 22 millimeters, sleeve 10 internal diameters are advisable with 32 millimeters, and like this, the width of annular gap 21 is exactly 5 millimeters.
Bysmalith is passed nozzle fill in after the boring, spraycan 22 promptly is connected to sleeve 10.In the embodiment shown, the ledge of bysmalith is completely enclosed within the spraying equipment 22, highlights but this device fabrication can be become allow bysmalith pass equipment.In the case, also should seal around the jag of bysmalith.
By means of spraycan, with the encapsulant 23 that is suitable for, clamp-on nozzle as cementation, encapsulant passes gap 21 and seal receptacle flows out for 16 li.Encapsulant the pressure effect under, elastic dilatations take place in seal receptacle 16.Encapsulant 23 is filled the boring around the bysmalith 20 19, and leaks in the slit big and small on the petrosal foramen wall in common mode, with the rock sealing, to prevent any current infiltration boring and crag on every side.
After injection was finished, spraycan 22 promptly broke away from sleeve 10, and as the situation of the described spraycan of patent specification US-A-4260295, nozzle promptly is left in the boring.
According to the present invention, by a kind of used check valve apparatus of above-mentioned US Patent specification that is different from is provided, can be to finish the fixing of injection and bysmalith with once operating.According to the present invention, parts of check valve apparatus are one piece of bysmaliths, and another parts are seal receptacles 16.Seal receptacle 16 is subjected to the effect of pressure in the boring of spray encapsulant, and this pressure will make seal receptacle 16 be close to hermetically on the bysmalith, like this, can prevent sealant leakage, and sealant is retained in the boring, hardens gradually or solidifies.Problem be sealant based on be inorganic encapsulant or organic encapsulant.Best sealant is cementation, but fluid or semifluid plastic material also can be used for this purposes.
Fig. 3 shows is another embodiment of nozzle as described herein.Among this figure with Fig. 1 and Fig. 2 in corresponding parts also with having marked identical numeral.
The same with Fig. 1 with the described nozzle of Fig. 2, a screw shell 10 is arranged on the described nozzle of present embodiment.One end of sleeve has a flange 25, and flange is tightened in or otherwise is fixed on the sleeve.An end face of seal 12 abuts in or is fixed on this flange with vulcanization process.The other end at this seal has an end boss 26 in addition, and it is movably on sleeve 10.At least one lock washer 27 abuts in the outside of this end boss.The threaded engagement of this lock washer or these lock washers and sleeve, and only allow the direction left side of drawing (in this example, towards) to move this packing ring/these packing rings towards sleeve.
Expanded at seal 12, during drill hole wall around touching, its course of work and embodiment illustrated in figures 1 and 2 the course of work identical.Different is that this packing ring or these packing rings 27 have replaced sleeve 15 and nut 14.
Another difference of present embodiment and embodiment illustrated in figures 1 and 2 is, it has a pressure-equalizing pipe 29, this pressure-equalizing pipe passes seal receptacle 16 and flange 25, and the interval 30 between sleeve 10 outsides and seal 12 inboards is switched to boring 19 parts that are positioned in the nozzle.Pass gap 21 and through hole 17 in injection, thereby strengthened in the process of nozzle rear portion pressure, the fluent material in the blasting materials will be squeezed in the interval 30 by this adapter.When compressing by means of 25,26 pairs of seals of flange, this volume at interval also increases thereupon.Consequently make fluent material be full of interval 30.Fluent material is incompressible basically, thereby nozzle better is fixed on the drill hole wall, thus reduced nozzle be pressed against the boring importer to risk.
So embodiment illustrated in fig. 3 is at present best.
Other member manufacturing method of injection apparatus shown in Figure 3 the same with according to embodiment illustrated in figures 1 and 2.So, the through hole 17 of bysmalith 20 can have inner flange or with the sealing flange 18 corresponding sealing flanges of Fig. 1 and Fig. 2.In embodiment illustrated in figures 1 and 2, seal receptacle 16 is fixed on the flange 11 with vulcanization process.In the embodiment shown in fig. 3, seal receptacle 16 can be with vulcanization process, be fixed on the flange 25 with corresponded manner, and like this, when flange 25 was tightened on the sleeve pipe 10, flange 25 just linked together with sleeve 10.
The scarf 28 of flange 25,26 can stop that seal 12 is contingent to be moved, and when vertical pressurized, it will be with respect to the expansion radially outward of flange 25 and 26.
Claims (5)
- One kind can make simultaneously boring (19) slit on every side obtain the sealing and make bysmalith (20) be fixed on boring in method, wherein, encapsulant (23) is by a nozzle ejection, seal sleeve (10-14) and a check valve apparatus that a band through hole is arranged on this nozzle, AEI After End of Injection, nozzle promptly rests in the boring, it is characterized in that: bysmalith (20) inserts, pass the through hole of valve nozzle on the one hand, between through hole and bysmalith, stay simultaneously next gap (21), pass check valve apparatus (16,20) on the other hand, a seal of check valve apparatus is formed by bysmalith (20), another seal (16) deformable ground is close on the bysmalith with sealing means, encapsulant (23) passes above-mentioned gap (21), passes check valve apparatus (16,20) again and sprays shot borehole (19).
- 2. one kind is used for encapsulant (23) is sprayed the injection apparatus of shot borehole (19) lining, this injection apparatus comprises the nozzle and the check valve apparatus (16 that have the seal sleeve (10-14) of the expansion of can holing towards periphery, 20), a through hole is arranged on the nozzle, check valve apparatus (16,20) be installed in facing to the nozzle termination of holing, it is characterized in that: the seal (16 of check valve apparatus, 20) form by a seal receptacle (16), the sealing seat is installed in the nozzle termination facing to boring (19), it is made by a kind of elastomeric material, a through hole (17) is arranged above, through hole (17) links to each other with the through hole of nozzle, the diameter of through nozzle hole is greater than the diameter of the bysmalith (20) that will use with injection apparatus, and the through hole (17) of seal receptacle (16) has one or more diameters less than above-mentioned bysmalith part, and these parts will flexibly be close on the bysmalith, constitute check valve apparatus (16,20) therewith.
- 3. a kind of injection apparatus as claimed in claim 2 is characterized in that: the through hole (17) of seal receptacle (16) is taper from the nozzle through hole and enlarges gradually.
- 4. as claim 2 or 3 described a kind of injection apparatus, it is characterized in that: there are some sealing flange or lips (18) to inner process seal receptacle (16) inboard, and they are close on the bysmalith (20).
- 5. as claim 2,3 or 4 described a kind of injection apparatus, it is characterized in that: the seal (12) in being included in seal receptacle (10-14) and be included between the straight-through sleeve (15) in the seal receptacle (10-14) gap (30) is arranged, extending a through duct (29) between in the face of the side of the seal receptacle (16) of boring (19) and this gap (30).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE9701325A SE509139C2 (en) | 1997-04-10 | 1997-04-10 | Ways to simultaneously seal cracks around boreholes and anchor a rock bolt, as well as rock bolt |
| SE97013254 | 1997-04-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1258335A true CN1258335A (en) | 2000-06-28 |
Family
ID=20406517
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98805206 Pending CN1258335A (en) | 1997-04-10 | 1998-04-09 | Injection device and injection method |
Country Status (10)
| Country | Link |
|---|---|
| EP (1) | EP1017926A1 (en) |
| JP (1) | JP2001518998A (en) |
| CN (1) | CN1258335A (en) |
| AU (1) | AU722633B2 (en) |
| CA (1) | CA2286025A1 (en) |
| EA (1) | EA199900919A1 (en) |
| NO (1) | NO994885L (en) |
| PL (1) | PL336121A1 (en) |
| SE (1) | SE509139C2 (en) |
| WO (1) | WO1998045576A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9470088B2 (en) | 2012-12-10 | 2016-10-18 | Suomen Metallityö Oy | Rock anchor bolt |
| CN112221857A (en) * | 2020-10-16 | 2021-01-15 | 广州赢帝工业设计有限公司 | Automatic change point and glue equipment assembly line |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE510418C2 (en) * | 1998-04-27 | 1999-05-25 | Haakan Eriksson | Device for reinforcement and sealing of rock wall |
| SE514084C2 (en) * | 1999-04-21 | 2000-12-18 | Gurlita Maskin Ab | Device and method for reinforcing and sealing rock wall including an expander for anchoring |
| SE527424C2 (en) * | 2004-07-08 | 2006-02-28 | Atlas Copco Rocktech Ab | Device and method for grouting and fixing reinforcing and / or anchoring elements in rock wall |
| CN109611610B (en) * | 2019-01-14 | 2023-08-08 | 中铁工程装备集团有限公司 | Continuous pipe jacking construction device and construction method for fluid pipeline |
| CA3219972A1 (en) * | 2021-05-24 | 2022-12-01 | Joel Eugene ADAMS | Grout free expandable standpipe |
| FI20235441A1 (en) * | 2023-04-20 | 2024-10-21 | Suomen Metallityoe Oy | SEALANTS, ROCK ANCHOR BOLT AND TOOLS |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NO162780C (en) * | 1986-12-08 | 1990-02-14 | Oersta Staalindustri | MOUNTAIN BOLT. |
| NO176069C (en) * | 1992-09-09 | 1999-06-25 | Irsta Stolindustri As | Device for anchorage and grouting of rock bolts |
| FI955515A0 (en) * | 1995-11-15 | 1995-11-15 | Juha Haavisto | Injekteringspropp |
-
1997
- 1997-04-10 SE SE9701325A patent/SE509139C2/en unknown
-
1998
- 1998-04-09 PL PL98336121A patent/PL336121A1/en unknown
- 1998-04-09 JP JP54270398A patent/JP2001518998A/en active Pending
- 1998-04-09 CN CN 98805206 patent/CN1258335A/en active Pending
- 1998-04-09 CA CA002286025A patent/CA2286025A1/en not_active Abandoned
- 1998-04-09 WO PCT/SE1998/000664 patent/WO1998045576A1/en not_active Application Discontinuation
- 1998-04-09 EA EA199900919A patent/EA199900919A1/en unknown
- 1998-04-09 AU AU70926/98A patent/AU722633B2/en not_active Ceased
- 1998-04-09 EP EP98917878A patent/EP1017926A1/en not_active Withdrawn
-
1999
- 1999-10-07 NO NO994885A patent/NO994885L/en not_active Application Discontinuation
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9470088B2 (en) | 2012-12-10 | 2016-10-18 | Suomen Metallityö Oy | Rock anchor bolt |
| CN108301857A (en) * | 2012-12-10 | 2018-07-20 | 索曼梅塔利托公司 | Rock anchor |
| CN108301857B (en) * | 2012-12-10 | 2019-08-13 | 索曼梅塔利托公司 | Rock anchor |
| CN112221857A (en) * | 2020-10-16 | 2021-01-15 | 广州赢帝工业设计有限公司 | Automatic change point and glue equipment assembly line |
Also Published As
| Publication number | Publication date |
|---|---|
| AU722633B2 (en) | 2000-08-10 |
| SE509139C2 (en) | 1998-12-07 |
| NO994885D0 (en) | 1999-10-07 |
| AU7092698A (en) | 1998-10-30 |
| EP1017926A1 (en) | 2000-07-12 |
| EA199900919A1 (en) | 2000-04-24 |
| SE9701325L (en) | 1998-10-11 |
| SE9701325D0 (en) | 1997-04-10 |
| PL336121A1 (en) | 2000-06-05 |
| WO1998045576A1 (en) | 1998-10-15 |
| NO994885L (en) | 1999-11-17 |
| JP2001518998A (en) | 2001-10-16 |
| CA2286025A1 (en) | 1998-10-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |