CN202531500U - Radial flow type jet flow wave pressure supercharger - Google Patents
Radial flow type jet flow wave pressure supercharger Download PDFInfo
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- CN202531500U CN202531500U CN2012201154978U CN201220115497U CN202531500U CN 202531500 U CN202531500 U CN 202531500U CN 2012201154978 U CN2012201154978 U CN 2012201154978U CN 201220115497 U CN201220115497 U CN 201220115497U CN 202531500 U CN202531500 U CN 202531500U
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- rotating disk
- pressure
- conduit
- radial
- cover plate
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- 238000000034 method Methods 0.000 claims abstract description 11
- 230000008569 process Effects 0.000 claims abstract description 8
- 238000002156 mixing Methods 0.000 claims abstract description 5
- 238000001125 extrusion Methods 0.000 claims description 20
- 239000007921 spray Substances 0.000 claims description 12
- 239000012530 fluid Substances 0.000 claims description 9
- 230000002093 peripheral effect Effects 0.000 claims description 8
- 238000009792 diffusion process Methods 0.000 claims description 7
- 230000010355 oscillation Effects 0.000 claims description 7
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 238000005192 partition Methods 0.000 claims description 3
- 238000005452 bending Methods 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 229910000679 solder Inorganic materials 0.000 claims description 2
- 230000007704 transition Effects 0.000 claims description 2
- 239000007789 gas Substances 0.000 abstract description 43
- 239000007788 liquid Substances 0.000 abstract description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 4
- 230000009471 action Effects 0.000 abstract description 3
- 239000003345 natural gas Substances 0.000 abstract description 2
- 238000007599 discharging Methods 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 238000007906 compression Methods 0.000 description 11
- 230000006835 compression Effects 0.000 description 9
- 230000008901 benefit Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001914 calming effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- 238000007738 vacuum evaporation Methods 0.000 description 1
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Abstract
The utility model provides a radial flow type jet flow wave pressure supercharger, wherein the energy exchange can be realized between high-pressure gas and low-pressure gas by running pressure wave, the energy mixing and spreading loss can be avoided, and the radial flow type jet flow wave pressure supercharger is high in isentropic efficiency, low in rotation speed and capable of operating with liquid and abundantly discharging air. A rectangular cross pressure-variable oscillating pipe groove way is adopted, so that the incoming loss and the flowing loss of the jet flow can be reduced; the groove way is a bent flow way which is radially distributed along the radial direction, and due to the action of a centrifugal force, the expansion process and compensation process can be reinforced, and the sufficient discharge of the compressed gas can be promoted; the wave pressure supercharger is internally provided with pressure balancing holes, so that the performance under different pressure ratio can be balanced; and a compressed air outflow opening is provided with a pressure expanding flow guider, so that the kinetic energy of the air flow can be effectively converted. According to the radial flow type jet flow wave pressure supercharger, the pressure energy of the stratum such as the pressure energy and the natural gas in the process of production can be adequately used, and a high-efficiency equipment selection can be provided for the effective use of a pressure energy source.
Description
Technical field
The utility model radial-flow type jet wave pressure supercharger belongs to the technical field that realizes supercharging with gas jet.
Background technique
The comprehensive utilization of gas pressure ability has important economic benefit and social benefit.Utilizing pressurized gas to expand aspect acting compresses low-pressure gas, equipment commonly used has decompressor-compressor bank, turbosupercharger and sparger.Turbine and turbosupercharger rely on impeller to transmit energy, complex structure, and rotational speed is high and be difficult to be with liquid to be operated.Though sparger has no rotating component, characteristics such as simple in structure, its efficient is very low, has only tens percent.The shortcoming that the axial flow jet supercharger also exists pressurized gas to be difficult to drain, its axial dimension is longer.
The model utility content
The utility model provides a kind of efficient, slow-speed of revolution, can be with the sufficient gas jet supercharging device of liquid operation, compact structure and exhaust-radial-flow type jet wave pressure supercharger.
In the utility model pressurized machine, high pressure directly contacts with low pressure two-way gas, relies on the gas pressure ripple to transmit the energy of pressurized gas pulse expansion work, directly low-pressure gas is compressed, and can obtain the gas of one pressure placed in the middle.Different with conventional jet mixing compression, said process does not have the blending of two-way gas basically, so the jet energy loss is little, and compression efficiency is high.Adopt radial flow type curved channel, utilize action of centrifugal force, the abundant discharge of gas adopts curved channel can obtain longer flow channel length after having strengthened expansion and compression process and having impelled compression, has reduced equipment size.
The purpose of the utility model is: provide that a kind of structure is simple relatively, volume is little, efficient, rotating speed is low, easy to maintenance, can be with the liquid operation, treating capacity elasticity is big, medium adaptability is strong and can the sufficient gas jet pressurized machine of exhaust; Satisfy under oil, gas-field exploitation and other occasions demand that can efficiently utilize compressed gas pressure.
The innovative technology solution that the utility model is taked is:
The internal circumference of rotating disk many closed channel of arranging as the pressure oscillation pipe; High-pressure spray nozzle and middle extrusion head piece are static, place the inner headed face and the periphery of rotating disk respectively, and axial height is aligned in the interior top and outer end openings of conduit in the rotating disk respectively; Rotation along with rotating disk; High-pressure spray nozzle jet successively in the conduit that the circumference radiation is arranged, the gas that produces in the compressional wave compression conduit boosts it, treats that conduit turns over after the several angle with rotating disk; Its end openings circumferentially overlaps with middle extrusion head piece, and the gas after boosting is discharged conduit; The top opening of jet rear slot track is owing to turn over nozzle; Promptly, produce extensional wave at opening this place's pressure is reduced, overlap when conduit top opening forwards to the low pressure gas ejecting port by the solid wall shutoff of nozzle periphery; Low-pressure gas is inhaled into conduit, repeats above-mentioned jet and compression then.
The rotation of the utility model rotating disk just for producing periodic jet, compression, exhaust and air-breathing required, rather than is carried out transformation of energy as turbomachinery, thus its rotating speed do not need very high (＜5000r/min).
The utility model is mainly connect the rotating disk of frustoconic shape by disc or frustoconic shape or disk; Rotating disk cover plate, many conduits as the pressure oscillation pipe, main shaft, last lower body, high-pressure spray nozzle, low pressure gas ejecting port, middle extrusion head piece, balancing orifice, high pressure admission mouth and high-pressure buffer chamber, low-pressure admission mouth and low pressure buffer chamber, middle extrusion gas port and middle pressure buffer cavity, coupling and motors are formed; It is characterized in that: in the ring cavity that surrounds between rotating disk interior edge face and the rotating disk cover plate interior edge face; With the narrow wall of the partition of many radial arrangements is that screen carries out the circumference cutting to ring cavity; In ring cavity, form many at the rotating disk inner peripheral surface with the outer peripheral surface both ends open and the conduit that the radial that side periphery seals is arranged; The axis of conduit is with the axis normal of rotating disk or become certain included angle, also becomes certain circumferential angle with the radius of rotating disk, and conduit is straight channel or curved channel; Its passage section is that uniform section, variable cross section or uniform section add variable cross section; The flow area of variable cross section adopts the degree of depth, width with conduit, or the ever-increasing mode of dark, wide size; Fluid along conduit increases to the gradually expansion type that flows to of rotating disk cylindrical; High-pressure spray nozzle and middle extrusion head piece respectively with the inner peripheral surface top mouth in pressure oscillation tube seat road and outer peripheral surface end port along the rotating disk radially aligned, and the axis of the two turns to the circumference angle that staggers certain along rotating disk; Middle extrusion head piece and middle pressure buffer cavity connecting part are provided with the diffusion fluid director, also are provided with the balancing orifice that conduit is communicated with middle pressure buffer cavity on the upper machine body.
For making the utility model radial-flow type jet wave pressure supercharger have higher efficient and adaptability, also adopted following several kinds of structure characteristics:
1. as the conduit of the crucial runner of compression process, its flow area longshore current to weaken the intensity that compressional wave is superimposed as shock wave, improves the isentropity of process to being that expansion gradually or partial-length section are expanded gradually, improves compression efficiency.
2. conduit is radial curved channel, and action of centrifugal force capable of using is strengthened compression and inflation process, and impels compression back gas fully to discharge; Adopt curved channel can obtain longer flow channel length, reduce equipment size.
3. between middle extrusion head piece and middle pressure buffer cavity, the diffusion fluid director is set, the harmless lost territory of the kinetic energy of calming the anger in effluenting is changed into the pressure ability.
4. all preferable for the performance that guarantees equipment under the different pressure ratios; Upper machine body is provided with the balancing orifice that conduit is communicated with middle pressure buffer cavity (12), after accomplishing a circulation, if the pressure in the conduit is higher than balancing orifice; Portion gas is pressed buffer cavity in entering via balancing orifice, and the pressure in the conduit is reduced; Vice versa.Can make the pressure in the conduit fair with the pressure of middle extrusion head piece all the time like this, avoid, when the conduit end overlaps with middle extrusion head piece, produce and disturb pressure wave in next one circulation.
The beneficial effect of the utility model is:
Obtain that a kind of rotating speed is low, volume is little, structure is simple relatively, energy transfer speed is fast, can with the liquid operation, can efficiently realize pressure-exchange between two kinds of gases, effectively utilize pressure can new type pressurized equipment.The pressure that the utility model radial-flow type jet wave pressure supercharger is suitable between all gases medium can exchange; Utilizing high pressure high gas rate well pressure energy of natural gas to promote the pressure rating of low-voltage and low-yield gas well, make low-pressure gas well high and stable yields aspect have very big using value.In addition, industrial waste gas pressure can utilize and oil and chemical industry in occasions such as vacuum evaporation, vacuum purification also be suitable for.
Below in conjunction with accompanying drawing and embodiment the utility model is done further explanation.
Description of drawings
Fig. 1 is the structure diagram of the utility model radial-flow type jet wave pressure supercharger.
Fig. 2 is the sketch of first kind of structural type of rotating disk conduit.
Fig. 3 is the sketch of second kind of structural type of rotating disk conduit.
Fig. 4 is the schematic representation of balancing orifice position and shape.
Among the figure, 1 low-pressure admission mouth, 2 low pressure buffer chambeies extrude head piece in 3,4 diffusion fluid directors, 5 radially cut off screen; 6 low pressure gas ejecting ports extrude gas port, 8 upper machine bodies, 9 motors, 10 coupling in 7; 11 main shafts are pressed buffer cavity, 13 high-pressure spray nozzles, 14 rotating disks, 15 pressure oscillation tube seat roads in 12; 16 rotating disk cover plates, 17 balancing orifices, 18 high-pressure buffer chambeies, 19 lower bodies, 20 high pressure admission mouths.
Embodiment
A kind of typical embodiment of the utility model radial-flow type jet wave pressure supercharger is described below, but is not confined to this kind mode of execution:
Radial-flow type jet wave pressure supercharger; Mainly connect the rotating disk 14 of frustoconic shape by cylindrical or frustoconic shape or cylinder; Rotating disk cover plate 16, many pressure oscillation tube seat road 15, main shaft 11, upper machine body 8, lower body 19, high-pressure spray nozzle 13, low pressure gas ejecting port 6, middle extrusion head piece 3, balancing orifice 17, high pressure admission mouth 20 and high-pressure buffer chamber 18, low-pressure admission mouth 1 and low pressure buffer chamber 2, middle extrusion gas port 7 and middle pressure buffer cavity 12, coupling 10 and 9 compositions of motor; In the ring cavity that surrounds between rotating disk 14 inner side surfaces and rotating disk cover plate 16 inner side surfaces; With many radially the narrow wall of partition arranged of radiation be that 5 pairs of ring cavities of screen carry out the circumference cutting, in ring cavity, form many both ends opens and conduit 15 that the radial of border seal is arranged.
Many are cut off the ring cavity that surrounds between 5 pairs of rotating disk 14 interior edge faces of screen and rotating disk cover plate 16 interior edge faces and carry out the circumference cutting; One of structural type that in ring cavity, forms many radial both ends open conduits 15 is; Mill out radial being uniformly distributed with and narrow groove that quantity is identical at rotating disk 14 interior edge faces and rotating disk cover plate 16 interior edge faces; With rotating disk 14 and rotating disk cover plate 16 arranged concentric; And each the narrow groove that makes rotating disk 14 and rotating disk cover plate 16 sides is along circumferentially corner alignment, screen 5 inserted immersed solder sealing behind the narrow groove of alignment, form many radial along the airtight conduit 15 of journey.
Many are cut off the ring cavity that surrounds between 5 pairs of rotating disk 14 lower surfaces of screen and rotating disk cover plate 16 upper surfaces and carry out the circumference cutting; Two of the structural type of many both ends open conduits 15 of formation are in ring cavity; Mill out the radial conduit that is uniformly distributed with at rotating disk 14 interior edge faces; Again rotating disk cover plate 16 is mounted on rotating disk 14, the profile of its rotating disk cover plate 16 interior edge faces is identical with the profile and the tapering of rotating disk 14 interior edge faces with tapering, form between disk body and the cover plate many radial along the airtight conduit 15 of journey.
The flow area of conduit 15 is along Cheng Bianhua; The form that changes enlarges after remaining unchanged or remain unchanged earlier after enlarging gradually from the top terminad or enlarging gradually earlier more gradually; Or constant all the time, promptly the length of gradually expanding section accounts for 0%～100% of whole conduit 15 length.The method of conduit 15 flow area flarings is on its degree of depth, width direction, to pursue to increase, and the flaring angle is between 0～60 °, and the altitude range of conduit 15 passage sections is 1～100mm, and width range is 1～100mm.
The middle diffusion fluid director 4 that extrudes head piece 3 and the setting of middle pressure buffer cavity 12 connecting parts; Be that flaring closed flow by surface blending constitutes; The angle of flare of runner is 5～60 °, and the bending clamp between runner axis and rotating disk 14 axis is contended gradual transition and reduced, and is 90～0 °.
It is 5～330 ° that high-pressure spray nozzle 13 turns to the angle that staggers with middle extrusion head piece 3 by circumference, by the location that relatively rotates of last lower body 819, adjusts and confirms this angle.
The circumference rotation alternate angle that has 10～180 ° between balancing orifice 17 and the middle extrusion head piece 3, clockwise dish sense of rotation, middle extrusion head piece 3 is preceding, balancing orifice 17 after.
The quantity of conduit 15 is 5～300, and length is 10～2000mm, and the diameter of rotating disk 14 is 10～6000mm.
The working mechanism of the utility model radial-flow type jet wave pressure supercharger is narrated as follows:
Pressurized gas enter high-pressure buffer chamber 18 from high pressure admission mouth 20; High-pressure spray nozzle 13 through static is accelerated into jet; Inject successively in each conduit 15 of rotating disk along with the rotation of rotating disk 14, in conduit 15, produce compressional wave, the gas in the supercharging conduit 15; Conduit forwards to and extrudes head piece 3 in the alignment afterwards, and supercharging gas is discharged.Conduit 15 can produce the extensional wave of in conduit, propagating with high-pressure spray nozzle 13 turn-ofves with by after the shutoff, and the pressure at conduit 15 tops is descended, and conduit 15 is connected with low pressure gas ejecting port 6 again immediately, and low-pressure gas gets into conduit 15.Because rotation is constantly worked each conduit successively, so pressurization can be carried out continuously, gas compiles the back and discharges continuously in middle pressure buffer cavity 12.
The Operational Limits of radial-flow type jet wave pressure supercharger is following:
The rotating speed of main shaft 11 and rotating disk 14: 500～6000r/min;
The pressure range of importing and exporting: 0～15MPa;
The pressure ratio scope of high low pressure gas: 1.2～5.
Claims (9)
1. a radial-flow type jet wave pressure supercharger is a kind of dependence pressed gas jet successively, makes non-permanent expansion work and the radial-flow type jet wave pressure supercharger of supercharging; Mainly connect the rotating disk (14) of frustoconic shape, rotating disk cover plate (16), many conduits (15) as the pressure oscillation pipe by disc, frustoconic shape or disk; Main shaft (11), upper machine body (8), lower body (19); High-pressure spray nozzle (13), low pressure gas ejecting port (6), middle extrusion head piece (3); Balancing orifice (17), high pressure admission mouth (20) and high-pressure buffer chamber (18), low-pressure admission mouth (1) and low pressure buffer chamber (2); Middle gas port (7) and the middle pressure buffer cavity (12) of extruding, diffusion fluid director (4), coupling (10) and motor (9) are formed; It is characterized in that: in the ring cavity that surrounds between rotating disk (14) inner side end and rotating disk cover plate (16) inner side end; With the narrow wall of the partition of many radial arrangements is that screen (5) carries out the circumference cutting to ring cavity, in ring cavity, form many at the rotating disk inner peripheral surface with the outer peripheral surface both ends open and the conduit (15) that the radial that side periphery seals is arranged, the axis normal of the axis of conduit (15) and rotating disk (14) or become certain included angle; Also become certain circumferential angle with the radius of rotating disk (14); Conduit (15) is straight channel or curved channel, and its passage section is that uniform section, variable cross section or uniform section add variable cross section, the flow area of variable cross section; Fluid along conduit (15) increases to the gradually expansion type that flows to of rotating disk cylindrical; High-pressure spray nozzle (13) and middle extrusion head piece (3) respectively with the inner peripheral surface top mouth in pressure oscillation tube seat road (15) and outer peripheral surface end port along rotating disk (14) radially aligned, and the axis of the two turns to the circumference angle that staggers certain along rotating disk (14); The middle head piece (3) that extrudes is provided with diffusion fluid director (4) with middle pressure buffer cavity (12) connecting part, also is provided with the balancing orifice (17) that conduit (15) is communicated with middle pressure buffer cavity (12) on the upper machine body (8).
2. pressurized machine as claimed in claim 1; It is characterized in that: many are cut off screen (5) ring cavity that surrounds between rotating disk (14) interior edge face and rotating disk cover plate (16) interior edge face are carried out the circumference cutting; One of structural type that in ring cavity, forms many radial both ends open conduits (15) is; Process radial being uniformly distributed with and narrow groove that quantity is identical at rotating disk (14) interior edge face and rotating disk cover plate (16) interior edge face; With rotating disk (14) and rotating disk cover plate (16) arranged concentric; And make the narrow groove of each of rotating disk (14) and rotating disk cover plate (16) side along circumferentially corner alignment, screen (5) is inserted immersed solder sealing behind the narrow groove of alignment, form between disk body and the cover plate many radial along the airtight conduit of journey (15).
3. pressurized machine as claimed in claim 1; It is characterized in that: many are cut off screen (5) ring cavity that surrounds between rotating disk (14) lower surface and rotating disk cover plate (16) upper surface are carried out the circumference cutting; Two of the structural type of many both ends open conduits of formation (15) are in ring cavity; Process the radial conduit that is uniformly distributed with at rotating disk (14) interior edge face; Again rotating disk cover plate (16) is mounted on rotating disk (14), the profile of its rotating disk cover plate (16) inner side end is identical with the profile and the tapering of rotating disk (14) inner side end with tapering, form between disk body and the cover plate many radial along the airtight conduit of journey (15).
4. pressurized machine as claimed in claim 1 is characterized in that: the form that conduit (15) flow area changes is a kind of in following: outside circumferential end enlarges gradually from rotating disk inner circumference top; Remain unchanged again after enlarging gradually earlier; Enlarge gradually again after remaining unchanged earlier; All the time constant, promptly the length of gradually expanding section accounts for 0%～100% of whole conduit (15) length; The method of conduit (15) flow area flaring is on its degree of depth, width direction, to pursue to increase, and the flaring angle is between 0～60 °, and the altitude range of conduit (15) passage section is 1～100mm, and width range is 1～100mm.
5. pressurized machine as claimed in claim 1 is characterized in that: conduit (15) is arranged along rotating disk (14) radial, and conduit (15) is straight channel or curved channel, and the tangent direction of its axis and rotating disk (14) angle between radially is-85～85 °; In the round platform section of rotating disk (14), the axis of conduit (15) is along radially gradually to extending axially, and the angle of its axis and rotating disk axis is 30～90 °.
6. pressurized machine as claimed in claim 1; It is characterized in that: the diffusion fluid director (4) that middle extrusion head piece (3) and middle pressure buffer cavity (12) connecting part are provided with; Be that flaring closed flow by surface blending constitutes; The angle of flare of runner is 5～60 °, and the bending clamp between runner axis and rotating disk (14) axis is contended gradual transition and reduced, and is 90～0 °.
7. pressurized machine as claimed in claim 1 is characterized in that: it is 5～330 ° that high-pressure spray nozzle (13) turns to the angle that staggers with middle extrusion head piece (3) by circumference, by the location that relatively rotates of upper machine body (8) and lower body (19), adjusts and confirms this angle.
8. pressurized machine as claimed in claim 1 is characterized in that: have 10～180 ° circumference rotation alternate angle between balancing orifice (17) and the middle extrusion head piece (3), along the dial rotation direction, middle extrusion head piece (3) is preceding, balancing orifice (17) after.
9. pressurized machine as claimed in claim 1 is characterized in that: the quantity of conduit (15) is 5～300, and length is 10～2000mm, and the diameter of rotating disk (14) is 10～6000mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201154978U CN202531500U (en) | 2012-03-23 | 2012-03-23 | Radial flow type jet flow wave pressure supercharger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201154978U CN202531500U (en) | 2012-03-23 | 2012-03-23 | Radial flow type jet flow wave pressure supercharger |
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| Publication Number | Publication Date |
|---|---|
| CN202531500U true CN202531500U (en) | 2012-11-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201154978U Expired - Lifetime CN202531500U (en) | 2012-03-23 | 2012-03-23 | Radial flow type jet flow wave pressure supercharger |
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| Country | Link |
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| CN (1) | CN202531500U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102606548A (en) * | 2012-03-23 | 2012-07-25 | 大连理工大学 | Radial-flow type fluidic pressure wave supercharger |
| WO2022036725A1 (en) * | 2020-08-20 | 2022-02-24 | 黄建军 | Fluid delivery and pressurization apparatus |
-
2012
- 2012-03-23 CN CN2012201154978U patent/CN202531500U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102606548A (en) * | 2012-03-23 | 2012-07-25 | 大连理工大学 | Radial-flow type fluidic pressure wave supercharger |
| CN102606548B (en) * | 2012-03-23 | 2014-07-23 | 大连理工大学 | Radial-flow type fluidic pressure wave supercharger |
| WO2022036725A1 (en) * | 2020-08-20 | 2022-02-24 | 黄建军 | Fluid delivery and pressurization apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20121114 Effective date of abandoning: 20140723 |
|
| RGAV | Abandon patent right to avoid regrant |