CN107647641A - One kind is without airduct self-purification type medicine storage cabinet - Google Patents

One kind is without airduct self-purification type medicine storage cabinet Download PDF

Info

Publication number
CN107647641A
CN107647641A CN201710709033.7A CN201710709033A CN107647641A CN 107647641 A CN107647641 A CN 107647641A CN 201710709033 A CN201710709033 A CN 201710709033A CN 107647641 A CN107647641 A CN 107647641A
Authority
CN
China
Prior art keywords
cabinet
filter
medicine storage
type medicine
purification
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.)
Withdrawn
Application number
CN201710709033.7A
Other languages
Chinese (zh)
Inventor
孙戟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jay Seright Safety Technology (wuxi) Co Ltd
Original Assignee
Jay Seright Safety Technology (wuxi) Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Jay Seright Safety Technology (wuxi) Co Ltd filed Critical Jay Seright Safety Technology (wuxi) Co Ltd
Priority to CN201710709033.7A priority Critical patent/CN107647641A/en
Publication of CN107647641A publication Critical patent/CN107647641A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47BTABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
    • A47B67/00Chests; Dressing-tables; Medicine cabinets or the like; Cabinets characterised by the arrangement of drawers
    • A47B67/02Cabinets for shaving tackle, medicines, or the like
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/02Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
    • B01D53/04Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
    • B01D53/0407Constructional details of adsorbing systems
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/02Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
    • B01D53/04Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
    • B01D53/0454Controlling adsorption
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23GCREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G7/00Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
    • F23G7/06Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
    • F23G7/07Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases in which combustion takes place in the presence of catalytic material
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

Abstract

The invention provides one kind without airduct self-purification type medicine storage cabinet, it can make the volatilization gas in cabinet is filtered to reach harmless standard and be thrown into laboratory internal, and purification efficiency is high, toxic gas can be purified discharge as early as possible, unit interval treating capacity is high, including at least one cabinet module, each cabinet module includes cabinet and filter element, vertically arranged air channel is provided with the side wall of the cabinet, the bottom of the madial wall of the side wall of the cabinet is provided with internal air inlet, the top side wall of the cabinet is provided with internal air outlet, the internal air outlet connects the filter element, the filter element includes the case for being arranged on the cabinet upper end, main filter core is provided with the case from bottom to top, filter saturation sensor, safety filter element, blower fan, outside air outlet is offered at the top of the case.

Description

One kind is without airduct self-purification type medicine storage cabinet
Technical field
The present invention relates to chemicals cabinet technical field, and in particular to one kind is without airduct self-purification type medicine storage cabinet.
Background technology
In each test unit, laboratory storage medicine, substantial amounts of acid, alkali and organic volatile, easy decomposition medicine can produce The harmful substances such as raw substantial amounts of poisonous and harmful and corrosive gas, smog, particulate, crisis experiment operator it is safe and healthy, Damage experimental facilities, pollution surrounding enviroment, it is therefore necessary to ensure that poisonous and harmful substance is smoothly discharged or purified treatment, with symbol Close the safety standard that laboratory environment reaches national regulation.
Notification number is that CN203709591U Chinese invention patent discloses a kind of self-purification type medicine storage cabinet, and it is in cabinet device Top sets filtration system, by allowing room air to be entered by cabinet bottom in cabinet, forces in cabinet contaminated air to upstream The dynamic filter that enters filters, and reaches harmless standard and is thrown into laboratory internal and purifies the air of a room simultaneously, yet with Substantial amounts of poisonous and harmful and corrosive gas molecular weight is both greater than air, once letting out for toxic and harmful gas occurs for medicine storage cabinet Leakage, under gravity, poisonous and harmful and corrosive gas can be deposited on the bottom of medicine storage cabinet, and room air is by cabinet bottom The poisonous and harmful and corrosive gas rapid increase for being deposited in bottom of cabinet bulk is made it difficult in into cabinet, causes purification efficiency low, together When also do not carry out concentration guiding to poisonous and harmful and corrosive gas, poisonous and harmful and corrosive gas constantly in cabinet with Air into cabinet mixes, and is difficult to be completely exhausted out all the time, purification efficiency is low, and unit interval treating capacity is low.
The content of the invention
In view of the above-mentioned problems, the invention provides one kind without airduct self-purification type medicine storage cabinet, it can make the warp in cabinet Filtering reaches harmless standard and is thrown into laboratory internal, and purification efficiency is high, and toxic gas can the row of being purified as early as possible Go out, unit interval treating capacity is high.
Its technical scheme is such:One kind is without airduct self-purification type medicine storage cabinet, including at least one cabinet module, each cabinet Module is made up of the cabinet and filter element, it is characterised in that:Vertically arranged air channel is provided with the side wall of the cabinet, The bottom of the madial wall of the side wall of the cabinet is provided with internal air inlet, and the top side wall of the cabinet is provided with internal air outlet, The internal air outlet connects the filter element, and the filter element includes the case for being arranged on the cabinet upper end, described Main filter core, filtering saturation sensor, safety filter element, blower fan are provided with case from bottom to top, is offered at the top of the case Outside air outlet.
Further, the filter element also includes being arranged on the catalytic combustion sensor at the internal air outlet.
Further, the filtering saturation sensor communicates respectively with the catalytic combustion sensor is connected with alarm dress Put.
Further, electric cabinet is additionally provided with front side of the case, the electric cabinet electricly connects with the blower fan, described Electric cabinet is connected with the catalytic combustion sensor and the filtering saturation sensor communication sensing data respectively.
Further, the cabinet is provided with openable cabinet door, and the top of the cabinet door is provided with outside air inlet.
Further, it is arranged at intervals with board putting things in the cabinet.
Further, the connecting plate and mode connects for screw before and after the cabinet are passed through between the cabinet module.
The present invention without airduct self-purification type medicine storage cabinet compared with prior art, there is advantages below and beneficial effect:Its Special air channel is set up for the discharge of toxic gas in the side wall of cabinet, while air inlet is arranged on to the inner side of the side wall of cabinet The bottom of wall, agrees with that toxic molecular weight gas is big, is sunken to the characteristics of bottom of cabinet bulk, and toxic gas can be from the air intake of bottom Mouth is drawn through air channel and quickly reaches filter element, and filter element is provided with the filtering that main filter core is used for toxic gas, while Whether the upper end for having main filter core sets filtering saturation sensor, for examining gas after filtering qualified discharge, simultaneously It can also judge whether to alarm according to the testing result of filtering saturation sensor, for reminding whether main filter core needs more Change;In addition, by setting safety filter element, dual fail-safe can be played a part of, filtration, purification can be played when main filter core fails Effect;The blower fan of filter element is arranged on the top of main filter core and safety filter element, and such set causes only in blower fan There is resistance inlet side, and the air side face exhaust outlet of blower fan improves ventilation efficiency without exhaust resistance, such setting so that single Filtration treatment amount is higher in the time of position, improves purification efficiency;The auto purification cabinet of the present invention also sets up outside air inlet, this Sample, which is set, enables to auto purification cabinet to keep negative pressure to realize filtration, purification, while can also play the work of cleaning laboratory air With;In addition, by internally setting catalytic combustion sensor at air outlet, when the air for including toxic gas enters purification list First leading portion, catalytic combustion sensor can detect the concentration of wherein flammable volatilization gas, if concentration exceedes the safety of setting Limit value, then produce and alarm and stop the exhausting of blower fan, to ensure safety, improve the present invention without airduct self-purification type medicine storage cabinet Security.
The cabinet module of the present invention, can be used alone, and can also select two or more block combiner according to capacity requirement Use, convenient, flexible connecting plate and mode connects for screw are used between cabinet module, need to only use the form of door of different directions just The cupboard of a variety of different memory sizes can be combined, it is convenient, flexible, it is often more important that, the purification process between each cleaning module Independent operating, it is possible to achieve deposit the incompatible chemicals of chemical property in different cabinets respectively, and other brands on the market It is not isolated between the dividing plate of cabinet both sides, is unable to reach above-mentioned function and effect.
Brief description of the drawings
Fig. 1 is the stereogram of the auto purification cabinet of the present invention;
Fig. 2 is the exploded view of the auto purification cabinet of the present invention;
Fig. 3 is the side view of the auto purification cabinet of the present invention;
Fig. 4 be Fig. 3 M-M to sectional view;
Fig. 5 is the schematic diagram without airduct self-purification type medicine storage cabinet of an alternative embodiment of the invention;
Fig. 6 is an alternative embodiment of the invention without the positive of the cabinet connection after airduct self-purification type medicine storage cabinet removal cabinet door Schematic diagram;
Fig. 7 is the schematic diagram at the back side of the connection of the cabinet without airduct self-purification type medicine storage cabinet of an alternative embodiment of the invention.
Embodiment
See Fig. 1, Fig. 2, Fig. 3, Fig. 4, one kind of the invention is without airduct self-purification type medicine storage cabinet, including at least one cabinet module 17, cabinet module 17 includes cabinet 1 and filter element 2, and vertically arranged air channel 16, the side of cabinet 1 are provided with the side wall of cabinet 1 The bottom of the madial wall of wall is provided with internal air inlet 3, and the top side wall of cabinet 1 is provided with internal air outlet 4, and internal air outlet 4 connects Logical filter element 2, filter element include the case 5 for being arranged on the upper end of cabinet 1, be provided with from bottom to top in case 5 main filter core 6, Saturation sensor 7, safety filter element 8, blower fan 9 are filtered, the top of case 5 offers outside air outlet 10, and filter element also includes The catalytic combustion sensor 11 being arranged at internal air outlet 4, filtering saturation sensor 7 lead to respectively with catalytic combustion sensor 11 News are connected with warning device, and the front side of case 5 is additionally provided with electric cabinet 12, and electric cabinet 12 electricly connects with blower fan 9, and electric cabinet 12 divides Do not communicate sensing data with catalytic combustion sensor 11 and filtering saturation sensor 7 to be connected, cabinet 1 is provided with openable cabinet door 13, the top of cabinet door 13 is provided with outside air inlet 14, and board putting things 15 is arranged at intervals with cabinet 1.
See Fig. 5, Fig. 6, Fig. 7, the auto purification cabinet of the present embodiment includes two cabinet modules 17, between cabinet module 17 Using convenient, flexible connecting plate 18 and mode connects for screw, it need to only use the form of the door of different directions can be to combine a variety of differences The cupboard of memory capacity, it is convenient, flexible, it is often more important that, the purification process independent operating between each cleaning module, Ke Yishi Deposit the incompatible chemicals of chemical property in existing different cabinets respectively, and on the market the cabinet both sides dividing plate of other brands it Between be not isolated, be unable to reach above-mentioned function and effect.
The present invention without airduct self-purification type medicine storage cabinet when in use, blower fan start after, the air in cabinet is inside cabinet Inside air inlet enter filter element along air channel, the air intake of outside air inlet keeps convection current in cabinet door, when comprising toxic The air of gas enters clean unit leading portion, and catalytic combustion sensor can detect the concentration of wherein flammable volatilization gas, such as Fruit concentration exceedes the safety limit of setting, then produces and alarm and stop the exhausting of blower fan, to ensure safety, the air in cabinet enters Purified after entering filter element by main filter element filtering, toxic gas is adsorbed by main filter core, the filtering of the upper end setting of main filter core Saturation sensor, for examining gas whether qualified discharge, while can also be according to filtering saturation sensing after filtering The testing result of device judges whether to alarm, and for reminding whether main filter core needs to change, safety filter element can play double guarantors The effect of danger, can play a part of filtration, purification when main filter core fails, enter blower fan by safety filter element filtered air Discharged from outside exhaust outlet.
The present invention without airduct self-purification type medicine storage cabinet compared with prior art, there is advantages below and beneficial effect:Its Special air channel is set up for the discharge of toxic gas in the side wall of cabinet, while air inlet is arranged on to the inner side of the side wall of cabinet The bottom of wall, agrees with the characteristics of toxic molecular weight gas is sunken to greatly bottom of cabinet bulk, and toxic gas can be from the air intake of bottom Mouth is drawn through air channel and quickly reaches filter element, and filter element is provided with the filtering that main filter core is used for toxic gas, while Whether the upper end for having main filter core sets filtering saturation sensor, for examining gas after filtering qualified discharge, simultaneously It can also judge whether to alarm according to the testing result of filtering saturation sensor, for reminding whether main filter core needs more Change;In addition, by setting safety filter element, dual fail-safe can be played a part of, filtration, purification can be played when main filter core fails Effect;The blower fan of filter element is arranged on the top of main filter core and safety filter element, and such set causes only in blower fan There is resistance inlet side, and the air side face exhaust outlet of blower fan improves ventilation efficiency without exhaust resistance, such setting so that single Filtration treatment amount is higher in the time of position, improves purification efficiency;The present invention's also sets up outside without airduct self-purification type medicine storage cabinet and enters Air port, so set and enable to auto purification cabinet to keep negative pressure to realize filtration, purification, while cleaning laboratory can also be played The effect of air;In addition, by internally setting catalytic combustion sensor at air outlet, when the air for including toxic gas enters Enter clean unit leading portion, catalytic combustion sensor can detect the concentration of wherein flammable volatilization gas, be set if concentration exceedes Fixed safety limit, then produce and alarm and stop the exhausting of blower fan, to ensure safety, improve the auto purification cabinet of the present invention Security.
The cabinet module of the present invention, can be used alone, and can also select two or more block combiner according to capacity requirement Use, use convenient, flexible connecting plate and mode connects for screw between module, need to use the form of the door of different directions can be with The cupboard of a variety of different memory sizes is combined, it is convenient, flexible, it is often more important that, the purification process between each cabinet is independently transported OK, it is possible to achieve deposit the incompatible chemicals of chemical property in different cabinets respectively, and the cabinet of other brands on the market It is not isolated between the dividing plate of both sides, is unable to reach above-mentioned function and effect.
The general principle and principal character and advantages of the present invention of the present invention has been shown and described above.The technology of the industry Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the simply explanation described in above-described embodiment and specification is originally The principle of invention, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these changes Change and improvement all fall within the protetion scope of the claimed invention.

Claims (7)

1. one kind includes cabinet and filtering without airduct self-purification type medicine storage cabinet, including at least one cabinet module, each cabinet module Unit, it is characterised in that:Vertically arranged air channel is provided with the side wall of the cabinet, under the madial wall of the side wall of the cabinet Portion is provided with internal air inlet, and the top side wall of the cabinet is provided with internal air outlet, and the internal air outlet connects the filtering Unit, the filter element include being arranged on the case of the cabinet upper end, be provided with from bottom to top in the case main filter core, Saturation sensor, safety filter element, blower fan are filtered, outside air outlet is offered at the top of the case.
A kind of 2. auto purification cabinet according to claim 1, it is characterised in that:The filter element also includes being arranged on Catalytic combustion sensor at the internal air outlet.
3. one kind according to claim 2 is without airduct self-purification type medicine storage cabinet, it is characterised in that:The filtering saturation sensor Communicated respectively with the catalytic combustion sensor and be connected with warning device.
4. one kind according to claim 3 is without airduct self-purification type medicine storage cabinet, it is characterised in that:The front side of the case is also set Have electric cabinet, the electric cabinet electricly connects with the blower fan, the electric cabinet respectively with the catalytic combustion sensor and The filtering saturation sensor communication sensing data connection.
5. one kind according to claim 1 is without airduct self-purification type medicine storage cabinet, it is characterised in that:The cabinet is provided with and can opened Cabinet door, the top of the cabinet door is provided with outside air inlet.
6. one kind according to claim 1 is without airduct self-purification type medicine storage cabinet, it is characterised in that:It is arranged at intervals in the cabinet There is board putting things.
7. one kind according to claim 1 is without airduct self-purification type medicine storage cabinet, it is characterised in that:Lead between the cabinet module The connecting plate and mode connects for screw crossed before and after the cabinet.
CN201710709033.7A 2017-08-17 2017-08-17 One kind is without airduct self-purification type medicine storage cabinet Withdrawn CN107647641A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710709033.7A CN107647641A (en) 2017-08-17 2017-08-17 One kind is without airduct self-purification type medicine storage cabinet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710709033.7A CN107647641A (en) 2017-08-17 2017-08-17 One kind is without airduct self-purification type medicine storage cabinet

Publications (1)

Publication Number Publication Date
CN107647641A true CN107647641A (en) 2018-02-02

Family

ID=61127679

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710709033.7A Withdrawn CN107647641A (en) 2017-08-17 2017-08-17 One kind is without airduct self-purification type medicine storage cabinet

Country Status (1)

Country Link
CN (1) CN107647641A (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03238015A (en) * 1990-02-15 1991-10-23 Matsushita Electric Ind Co Ltd On-vehicle air purifier
CN2843457Y (en) * 2005-12-03 2006-12-06 海尔集团公司 Biological safety cupboard
CN203709591U (en) * 2013-12-26 2014-07-16 上海冠戈实业有限公司 Air-hose-free self-cleaning type medicine storage cabinet
KR101500923B1 (en) * 2015-01-16 2015-03-12 주식회사 신생 Ventilation Type Reagent Depository Combining Filter Type
CN205072434U (en) * 2015-10-10 2016-03-09 大橡木(苏州)实验室系统工程有限公司 Medicine cabinet
CN105665040A (en) * 2016-03-01 2016-06-15 王俊梅 Air purification type reagent cabinet capable of uniformly distributing air
CN205699836U (en) * 2016-06-06 2016-11-23 杰斯瑞特安全科技(无锡)有限公司 A kind of automatic control system of hazardous gas purifier

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03238015A (en) * 1990-02-15 1991-10-23 Matsushita Electric Ind Co Ltd On-vehicle air purifier
CN2843457Y (en) * 2005-12-03 2006-12-06 海尔集团公司 Biological safety cupboard
CN203709591U (en) * 2013-12-26 2014-07-16 上海冠戈实业有限公司 Air-hose-free self-cleaning type medicine storage cabinet
KR101500923B1 (en) * 2015-01-16 2015-03-12 주식회사 신생 Ventilation Type Reagent Depository Combining Filter Type
CN205072434U (en) * 2015-10-10 2016-03-09 大橡木(苏州)实验室系统工程有限公司 Medicine cabinet
CN105665040A (en) * 2016-03-01 2016-06-15 王俊梅 Air purification type reagent cabinet capable of uniformly distributing air
CN205699836U (en) * 2016-06-06 2016-11-23 杰斯瑞特安全科技(无锡)有限公司 A kind of automatic control system of hazardous gas purifier

Similar Documents

Publication Publication Date Title
US9961912B2 (en) Filtration system
US4098174A (en) Total exhaust laminar flow biological fume hood safety cabinet and method
JP5759649B1 (en) Exhaust treatment device and storage device
CN107647641A (en) One kind is without airduct self-purification type medicine storage cabinet
CN205351559U (en) Low temperature plasma exhaust gas purifying apparatus
CN203349406U (en) Combined-type air treatment device
CN205964566U (en) Plant's air sterilization and portable system of new trend circulation
CN210613733U (en) Laboratory is with chemical reagent safety ventilation storage cabinet
CN203349409U (en) Smoke purifying machine
CN103245023B (en) Dust purifier
CN209576200U (en) Modularization active carbon adsorber
CN205072434U (en) Medicine cabinet
CN204902027U (en) Plasma space clarifier
CN212731457U (en) Self-cleaning device of reagent storage cabinet
CN209471003U (en) Glow wire test's machine for nylon material
US10506817B2 (en) Filtration system
CN211660024U (en) No tuber pipe is from clean type medicine storage cabinet
CN208894829U (en) A kind of cleaning vent cabinet
CN206861732U (en) Space disinfection equipment
CN213078009U (en) A processing system for detaching foul smell among danger exhaust fume
CN213336824U (en) Air purification inspection cabin
CN214319466U (en) Fire prevention cabinet with tail gas clean system
CN211936235U (en) Animal experiment anesthesia toxic gas utilizes handles purifier
CN209451609U (en) Chemical reagent storehouse air cleaning system
CN213346513U (en) Medical sampling isolation cabin and system

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
WW01 Invention patent application withdrawn after publication

Application publication date: 20180202

WW01 Invention patent application withdrawn after publication