CN107401674A - Shell and tube vapourizing unit - Google Patents
Shell and tube vapourizing unit Download PDFInfo
- Publication number
- CN107401674A CN107401674A CN201710706512.3A CN201710706512A CN107401674A CN 107401674 A CN107401674 A CN 107401674A CN 201710706512 A CN201710706512 A CN 201710706512A CN 107401674 A CN107401674 A CN 107401674A
- Authority
- CN
- China
- Prior art keywords
- cylinder
- tube
- shell
- body end
- barrel body
- 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
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 claims abstract description 59
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000010410 layer Substances 0.000 claims description 8
- 238000009413 insulation Methods 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 7
- 239000011241 protective layer Substances 0.000 claims description 4
- 230000008016 vaporization Effects 0.000 abstract description 9
- 238000009834 vaporization Methods 0.000 abstract description 7
- 239000007789 gas Substances 0.000 description 24
- 239000007788 liquid Substances 0.000 description 8
- 229920000642 polymer Polymers 0.000 description 8
- 230000001954 sterilising effect Effects 0.000 description 7
- 239000006200 vaporizer Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 239000004593 Epoxy Substances 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 239000003814 drug Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 2
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000004659 sterilization and disinfection Methods 0.000 description 2
- JECYNCQXXKQDJN-UHFFFAOYSA-N 2-(2-methylhexan-2-yloxymethyl)oxirane Chemical compound CCCCC(C)(C)OCC1CO1 JECYNCQXXKQDJN-UHFFFAOYSA-N 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 239000003899 bactericide agent Substances 0.000 description 1
- 235000008429 bread Nutrition 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C7/00—Methods or apparatus for discharging liquefied, solidified, or compressed gases from pressure vessels, not covered by another subclass
- F17C7/02—Discharging liquefied gases
- F17C7/04—Discharging liquefied gases with change of state, e.g. vaporisation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2221/00—Handled fluid, in particular type of fluid
- F17C2221/03—Mixtures
- F17C2221/032—Hydrocarbons
- F17C2221/033—Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Apparatus For Disinfection Or Sterilisation (AREA)
Abstract
The present invention relates to technical field of medical instruments, more particularly to a kind of shell and tube vapourizing unit, including for accommodating the cylinder of circulating hot water, the cylinder upper/lower terminal is sealed by barrel body end cover；In the cylinder, more straight-through tubulations are disposed with along the length direction of the cylinder, the both ends of the tubulation pass through the barrel body end cover, and are sealed with the barrel body end cover；The barrel body end cover of the cylinder upper/lower terminal connects dismountable upper cover and low head respectively, by the upper cover and low head by the closed at both ends in confined space of tubulation；The upper cover is connected with ethylene oxide gas escape pipe, and the low head is connected with ethylene oxide gas air inlet pipe；Water inlet pipe and outlet pipe are connected with the side wall of the cylinder.The present invention ensure that the unimpeded of vaporization pipeline, ensure that the normal work of equipment, improve equipment life, reduce equipment operating cost under conditions of ensureing that oxirane fully vaporizes.
Description
Technical field
The invention belongs to technical field of medical instruments, more particularly to a kind of shell and tube vapourizing unit.
Background technology
Ethylene oxide sterilizer is under certain temperature, pressure and damp condition, with certain density ethylene oxide gas
The equipment that low temperature suffocating sterilization is carried out to the article being sealed in sterilizing chamber, it is the weight that the sterilization process of medicine equipment production uses
Equipment is wanted, is widely used in medicine equipment production.
Oxirane vaporizer is the important component of ethylene oxide sterilizer.The sterile medium of ethylene oxide sterilizer
Oxirane is a kind of high efficient cryogenic bactericidal agent.Oxirane is a kind of hypertoxic, inflammable, explosive chemical substance, is under low temperature
Colourless transparent liquid, vapourizing temperature are 10.7 DEG C, slightly heavier than air after vaporization, are easily polymerize when heated.
The supply status of industrial oxirane are the liquid of bottled sealing.Input is required when ethylene oxide sterilizer sterilizes
Oxirane to completely vaporize state, oxirane is penetrated packing material and packaged medicine equipment is gone out
Bacterium.There is certain pressure in liquid bottle, by pipeline to being passed through quantitative completely vaporize in the sterilizing chamber of the negative pressure state of sealing
Ethylene oxide gas sterilized.Because oxirane is liquid in bottle, to gas, epoxy second must be become during sterilizing chamber
Alkane can not possibly be completely vaporized by the short distance of liquid bottle to sterilizing chamber, and be in gas-liquid mixture phase.Therefore need in liquid bottle to going out
The requirement that oxirane completely vaporizes could be met by increasing a vaporizer between bacterium room.
The vaporizer of ethylene oxide sterilizer of the prior art is typically all to be coiled into the pipe for conveying oxirane greatly
The coil pipe of the coil spring shape of diameter is fitted into a closed cylinder, and circulating hot water is passed through in cylinder to the oxirane by coil pipe
Heating, accelerate oxirane vaporescence.Purpose using multi-turn coil pipe is to make to prolong by the oxirane heat time of coil pipe
It is long, oxirane is fully vaporized.
Because oxirane easily polymerize in the state of vaporization, polymer hardness is higher, and is firmly combined with tube wall,
It is difficult to clean up, polymer, which has been accumulated more, can block appendix, influence the conveying of oxirane, can not because breather pipe is plate-like
Mechanical chipping is carried out, pipeline blockage is excessive, and vaporizer is just scrapped.Therefore cause the cleaning of ethylene oxide polymer difficult and early stage
The problem of scrapping.
The content of the invention
In order to solve the above technical problems, the purpose of the present invention is to provide a kind of shell and tube vaporization dress for ethylene oxide sterilizer
Put, under conditions of ensureing that oxirane fully vaporizes, disassemble vapourizing unit and carry out artificial mechanism cleaning accumulation
Ethylene oxide polymer, ensure pipeline it is unimpeded, ensure equipment energy normal work, improve equipment life, reduce equipment operation into
This.
The invention provides a kind of shell and tube vapourizing unit, including for accommodating the cylinder of circulating hot water, cylinder upper and lower two
End is sealed by barrel body end cover；In cylinder, more straight-through tubulations are disposed with along the length direction of cylinder, the both ends of tubulation pass through
Barrel body end cover, and sealed with barrel body end cover；The barrel body end cover of cylinder upper/lower terminal connects dismountable upper cover and lower envelope respectively
Head, by upper cover and low head by the closed at both ends in confined space of tubulation；Upper cover is connected with ethylene oxide gas and gone out
Tracheae, low head are connected with ethylene oxide gas air inlet pipe；Water inlet pipe and outlet pipe are connected with the side wall of cylinder.
Further, the connection end of upper cover and low head and barrel body end cover is provided with flange, and flange passes through bolt and cylinder
End cap connects.
Further, sealing gasket is provided between flange and barrel body end cover.
Further, cylinder is connected with the first temperature sensor for measuring cylinder body-internal-circulation hot water temperature.
Further, the second temperature that ethylene oxide gas escape pipe is connected with for measuring ethylene oxide gas temperature passes
Sensor.
Further, it is coated with thermal insulation layer in the side wall of cylinder.
Further, it is coated with protective layer outside thermal insulation layer.
Further, low head is connected with the supporting leg for supporting shell and tube vapourizing unit.
Further, outlet pipe is located at the upper end of cylinder lateral wall, and water inlet pipe is located at the lower end of cylinder lateral wall.
By such scheme, by shell and tube vapourizing unit, under conditions of ensureing that oxirane fully vaporizes, pass through by
The coil pipe of one root long is changed to the straight tube of more and column distribution, disassembles vapourizing unit and carries out artificial mechanism cleaning accumulation
Ethylene oxide polymer, ensure that the unimpeded of pipeline, ensure that the normal work of equipment, improve equipment life, reduce
Equipment operating cost.
Described above is only the general introduction of technical solution of the present invention, in order to better understand the technological means of the present invention,
And can be practiced according to the content of specification, below with presently preferred embodiments of the present invention and coordinate accompanying drawing describe in detail as after.
Brief description of the drawings
Fig. 1 is the structural representation of shell and tube vapourizing unit of the present invention.
Label in figure：
1- ethylene oxide gas escape pipes；
2- upper covers；21- flanges；
3- bolts；
4- sealing gaskets；
5- cylinders；51-barrel body end cover；
6- thermal insulation layers；
7- protective layers；
8- tubulations (more)；
9- low heads；
10- ethylene oxide gas air inlet pipe；
11- outlet pipes；
12- water inlet pipes；
13- supporting legs；
The temperature sensors of 14- first；
15- second temperature sensors.
Embodiment
With reference to the accompanying drawings and examples, the embodiment of the present invention is described in further detail.Implement below
Example is used to illustrate the present invention, but is not limited to the scope of the present invention.
Join shown in Fig. 1, present embodiments provide a kind of shell and tube vapourizing unit, including cylinder 5, cylinder 5 is by stainless steel tube
It is made (or stainless steel plate is welded), a diameter of D, the both ends of cylinder 5 are welded with barrel body end cover 51, by suitable in barrel body end cover 51
When interval, more internal diameters of welding are the stainless steel tubulation 8 that d length is L, and oxirane is heated by tubulation 8 and vaporized.
Barrel body end cover 51 should ensure that the sealing of cylinder 5 after being welded with cylinder 5 and tubulation 8, must not be leaked through pressure test.
The upper side of cylinder 5 is welded with outlet pipe 11, and downside is welded with water inlet pipe 12, and hot water enters after cylinder 5 through outlet pipe from water inlet pipe 12
11 outflows.
The barrel body end cover 51 of the upper/lower terminal of cylinder 5 is connected to upper cover 2 and low head 9, upper cover 2 and low head 9
End face be welded with flange 21, the top surface of upper cover 2 is welded with ethylene oxide gas escape pipe 1, and the top of low head 9 is welded with epoxy
The flange 21 of ethane gas air inlet pipe 10, upper cover 2 and low head 9 is respectively with the cylinder of both ends of the surface on more bolts 3 and cylinder 5
End cap 51 is connected, and sealing gasket 4 is provided between flange 21 and barrel body end cover 51, it is ensured that vapourizing unit seals, ethylene oxide gas
Body does not leak.The tubulation 8 in cylinder can be cleared up after upper low head is dismantled, prevent tubulation 8 from blocking.
Supporting leg 13 is welded with low head 9, to support vapourizing unit.Supporting leg 13 is fixed on ground with bolt after installation
On, ensure the stability of vaporizer.
First temperature sensor 14 is installed, for determining the temperature of hot water in cylinder 5 on cylinder 5.Ethylene oxide gas
Escape pipe 1 is connected with second temperature sensor 15, and second temperature sensor 15 enters ethylene oxide sterilizer case installed in close
On the oxirane pipeline of body, for determining the temperature of ethylene oxide gas.
The outside of cylinder 5 is enclosed with the thermal insulation layer 6 made of heat-barrier material and is used as being incubated cylinder 5, in 6 outer bread of thermal insulation layer
Protective layer 7 is covered with, to protect thermal insulation layer 6.
In the present embodiment, vaporization work first enters heat recirculated water valve opening, circulating hot water from water inlet pipe 12 before starting
Enter and outflowed back to after being full of in cylinder 5 from outlet pipe 11 in cyclic water tank.When the first temperature sensor 14 on cylinder 5 measures
Hot water temperature reach the temperature value of setting after, under conditions of hot water circuit is kept open oxirane air supply system valve
Door, bottled ethylene oxide gas (being also likely to be gas-liquid mixture) at room temperature pass through under the entrance of ethylene oxide gas air inlet pipe 10
Entered back into after diffusion is stable in end socket 9 in each tubulation 8, the heat of hot water in cylinder 5 is absorbed during by tubulation 8 makes epoxy
The temperature of ethane gas rises until completely vaporizing, and the ethylene oxide gas after vaporization lead to again after concentrating stabilization by upper cover 2
The state for crossing ethylene oxide gas escape pipe 1 and associated pipe to completely vaporize is input in sterilizer casing and sterilized, when
When the temperature value that second temperature sensor 15 is measured to is less than the temperature set, alarm signal is sent, user should take measures
Improve ethylene oxide gas temperature.Just stop conveying ethylene oxide gas after aeration quantity reaches the requirement of setting, by gas cylinder
Valve is closed, and gas replenishment process terminates.
After oxirane gas replenishment process terminates, the oxirane in vapourizing unit should be fully entered in sterilizer casing,
But still there is a small amount of ethylene oxide residue in vaporizer pipeline on pipeline when valve is closed, because oxirane is vaporizing
Polymerisation is had under state, polymer is firmly bonded on tube wall.Although fill after oxirane and sterilize every time on request
Pipeline will be purged with nitrogen after end, but unavoidably used on pipeline with the presence of a small amount of ethylene oxide polymer
Time is grown, and polymer increase, makes pipeline not smooth, and caliber diminishes, and lengthens oxirane vaporization and inflationtime, influences to give birth to
Produce efficiency.It can not be ventilated when blocking serious, it is impossible to carry out sterilizing works.
In view of the above-mentioned problems, the sterilizer of 100 cubic metres, 35 cubic metres equal-specifications has used the tubulation that the present embodiment provides
Formula vapourizing unit, by periodically disassembling the end socket at vapourizing unit both ends, manually the method for mechanical chipping is in cylinder 5
Straight-through tubulation 8 is cleared up, and can prevent tubulation from blocking, and is ensured equipment normal use, is not influenceed to produce, and extends vapourizing unit
Service life.
Described above is only the preferred embodiment of the present invention, is not intended to limit the invention, it is noted that for this skill
For the those of ordinary skill in art field, without departing from the technical principles of the invention, can also make it is some improvement and
Modification, these improvement and modification also should be regarded as protection scope of the present invention.
Claims (9)
1. a kind of shell and tube vapourizing unit, it is characterised in that upper and lower including the cylinder for accommodating circulating hot water, the cylinder
Both ends are sealed by barrel body end cover；
In the cylinder, more straight-through tubulations are disposed with along the length direction of the cylinder, the both ends of the tubulation pass through institute
Barrel body end cover is stated, and is sealed with the barrel body end cover；
The barrel body end cover of the cylinder upper/lower terminal connects dismountable upper cover and low head respectively, passes through the upper cover
And low head is by the closed at both ends in confined space of tubulation；
The upper cover is connected with ethylene oxide gas escape pipe, and the low head is connected with ethylene oxide gas air inlet pipe；
Water inlet pipe and outlet pipe are connected with the side wall of the cylinder.
2. shell and tube vapourizing unit according to claim 1, it is characterised in that the upper cover and low head and the cylinder
The connection end of body end lid is provided with flange, and the flange is connected by bolt with the barrel body end cover.
3. shell and tube vapourizing unit according to claim 2, it is characterised in that between the flange and the barrel body end cover
Provided with sealing gasket.
4. shell and tube vapourizing unit according to claim 1, it is characterised in that the cylinder is connected with for measuring cylinder
First temperature sensor of interior circulating hot water temperature.
5. shell and tube vapourizing unit according to claim 4, it is characterised in that the ethylene oxide gas escape pipe connection
There is the second temperature sensor for measuring ethylene oxide gas temperature.
6. shell and tube vapourizing unit according to claim 1, it is characterised in that be coated with the side wall of the cylinder heat-insulated
Layer.
7. shell and tube vapourizing unit according to claim 6, it is characterised in that be coated with protective layer outside the thermal insulation layer.
8. shell and tube vapourizing unit according to claim 1, it is characterised in that the low head is connected with for supporting institute
State the supporting leg of shell and tube vapourizing unit.
9. shell and tube vapourizing unit according to claim 1, it is characterised in that the outlet pipe is located at the cylinder lateral wall
Upper end, the water inlet pipe be located at the cylinder lateral wall lower end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710706512.3A CN107401674A (en) | 2017-08-17 | 2017-08-17 | Shell and tube vapourizing unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710706512.3A CN107401674A (en) | 2017-08-17 | 2017-08-17 | Shell and tube vapourizing unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107401674A true CN107401674A (en) | 2017-11-28 |
Family
ID=60396514
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710706512.3A Pending CN107401674A (en) | 2017-08-17 | 2017-08-17 | Shell and tube vapourizing unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107401674A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113117123A (en) * | 2021-05-26 | 2021-07-16 | 上海国颂医疗科技有限公司 | Device capable of reducing safety risk of ethylene oxide gas combustion or explosion |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080071100A1 (en) * | 2001-02-08 | 2008-03-20 | Sd Lizenzverwertungsgesellschaft Mbh & Co. Kg | Exothermic reaction system |
| CN101520284A (en) * | 2009-03-25 | 2009-09-02 | 张伟 | Shell tube counter flow type heat exchanger |
| CN201589061U (en) * | 2009-12-17 | 2010-09-22 | 乐山永祥硅业有限公司 | Liquid chlorine vaporizing device |
| CN202327640U (en) * | 2011-11-09 | 2012-07-11 | 乌鲁木齐市隆盛达环保科技有限公司 | Liquefied natural gas gasifying device for water-bath vehicle |
| CN202700109U (en) * | 2012-07-24 | 2013-01-30 | 唐山市冀东溶剂有限公司 | Comprehensive vaporizer |
| CN203017958U (en) * | 2012-09-27 | 2013-06-26 | 中国石油化工股份有限公司 | Efficient demister |
| CN203784633U (en) * | 2014-03-10 | 2014-08-20 | 阜新新纪煤矿科技所 | Coal-fired water-bath type vaporizer |
| CN105509515A (en) * | 2015-12-31 | 2016-04-20 | 无锡辉腾科技有限公司 | Novel air bath type vaporizer |
| CN205191206U (en) * | 2015-11-11 | 2016-04-27 | 刘洪光 | Liquid chlorine steel bottle gasification equipment |
| CN106492490A (en) * | 2015-09-08 | 2017-03-15 | 宜都兴发化工有限公司 | Efficient liquid carburator |
| CN207500806U (en) * | 2017-08-17 | 2018-06-15 | 武健 | Shell and tube vapourizing unit |
-
2017
- 2017-08-17 CN CN201710706512.3A patent/CN107401674A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080071100A1 (en) * | 2001-02-08 | 2008-03-20 | Sd Lizenzverwertungsgesellschaft Mbh & Co. Kg | Exothermic reaction system |
| CN101520284A (en) * | 2009-03-25 | 2009-09-02 | 张伟 | Shell tube counter flow type heat exchanger |
| CN201589061U (en) * | 2009-12-17 | 2010-09-22 | 乐山永祥硅业有限公司 | Liquid chlorine vaporizing device |
| CN202327640U (en) * | 2011-11-09 | 2012-07-11 | 乌鲁木齐市隆盛达环保科技有限公司 | Liquefied natural gas gasifying device for water-bath vehicle |
| CN202700109U (en) * | 2012-07-24 | 2013-01-30 | 唐山市冀东溶剂有限公司 | Comprehensive vaporizer |
| CN203017958U (en) * | 2012-09-27 | 2013-06-26 | 中国石油化工股份有限公司 | Efficient demister |
| CN203784633U (en) * | 2014-03-10 | 2014-08-20 | 阜新新纪煤矿科技所 | Coal-fired water-bath type vaporizer |
| CN106492490A (en) * | 2015-09-08 | 2017-03-15 | 宜都兴发化工有限公司 | Efficient liquid carburator |
| CN205191206U (en) * | 2015-11-11 | 2016-04-27 | 刘洪光 | Liquid chlorine steel bottle gasification equipment |
| CN105509515A (en) * | 2015-12-31 | 2016-04-20 | 无锡辉腾科技有限公司 | Novel air bath type vaporizer |
| CN207500806U (en) * | 2017-08-17 | 2018-06-15 | 武健 | Shell and tube vapourizing unit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113117123A (en) * | 2021-05-26 | 2021-07-16 | 上海国颂医疗科技有限公司 | Device capable of reducing safety risk of ethylene oxide gas combustion or explosion |
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| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: No. 485, zhaoxindian village, Changxindian Township, Fengtai District, Beijing 100072 Applicant after: Wu Jian Address before: No. 485, Zhaoxin village, Changxindian Town, Fengtai District, Beijing 100072 Applicant before: Wu Jian |
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| CB02 | Change of applicant information | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20211025 Address after: No. 485, zhaoxindian village, Changxindian Township, Fengtai District, Beijing 100072 Applicant after: Beijing Changfeng Chengyao Technical Service Center Address before: No. 485, zhaoxindian village, Changxindian Township, Fengtai District, Beijing 100072 Applicant before: Wu Jian |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171128 |
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