SE508427C2 - Odor filter for vacuum cleaner - Google Patents
Odor filter for vacuum cleanerInfo
- Publication number
- SE508427C2 SE508427C2 SE9501409A SE9501409A SE508427C2 SE 508427 C2 SE508427 C2 SE 508427C2 SE 9501409 A SE9501409 A SE 9501409A SE 9501409 A SE9501409 A SE 9501409A SE 508427 C2 SE508427 C2 SE 508427C2
- Authority
- SE
- Sweden
- Prior art keywords
- carbon
- odor filter
- filter according
- odor
- air
- Prior art date
Links
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 58
- 239000000428 dust Substances 0.000 claims abstract description 16
- 229910052799 carbon Inorganic materials 0.000 claims description 29
- 239000000463 material Substances 0.000 claims description 18
- 239000000853 adhesive Substances 0.000 claims description 12
- 230000001070 adhesive effect Effects 0.000 claims description 12
- CREMABGTGYGIQB-UHFFFAOYSA-N carbon carbon Chemical compound C.C CREMABGTGYGIQB-UHFFFAOYSA-N 0.000 claims description 6
- 239000011203 carbon fibre reinforced carbon Substances 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- 239000011230 binding agent Substances 0.000 claims description 4
- 229920005830 Polyurethane Foam Polymers 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims description 3
- 230000004913 activation Effects 0.000 claims description 2
- 238000004132 cross linking Methods 0.000 claims description 2
- 238000000605 extraction Methods 0.000 claims description 2
- 229920000058 polyacrylate Polymers 0.000 claims description 2
- 239000011148 porous material Substances 0.000 claims description 2
- 239000004753 textile Substances 0.000 claims description 2
- 230000035508 accumulation Effects 0.000 claims 1
- 238000009825 accumulation Methods 0.000 claims 1
- -1 carbon pressure Chemical compound 0.000 claims 1
- 238000003763 carbonization Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 description 4
- 238000001179 sorption measurement Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 239000003610 charcoal Substances 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 240000005979 Hordeum vulgare Species 0.000 description 1
- 235000007340 Hordeum vulgare Nutrition 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 150000001721 carbon Chemical class 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 239000003415 peat Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/0081—Means for exhaust-air diffusion; Means for sound or vibration damping
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
- A47L9/12—Dry filters
Abstract
Description
508 427 2 olägenheten, att dammsugaren måste vara speciellt anordnad för dessa efterfilter och att på grund av det ökade luftmot- ståndet luften i dammsugaren värmes mer än utan efterfilter och därmed effekten hos det aktiva kolet minskas. 508 427 2 the disadvantage that the vacuum cleaner must be specially arranged for these after-filters and that due to the increased air resistance the air in the vacuum cleaner is heated more than without an after-filter and thus the effect of the activated carbon is reduced.
Dessutom har ett sådant filter icke något stort tvärsnitt, vilket i sin tur verkar ogynnsamt på luftmotståndet och adsorptionseffekten.In addition, such a filter does not have a large cross section, which in turn has an unfavorable effect on air resistance and adsorption effect.
Uppgiften för uppfinningen är att åstadkomma ett effektivt luktfilter för dammsugare, som kan inbyggas före turbinen utan att brännbart damm bildas, som kan leda till en motor- brand.The object of the invention is to provide an effective odor filter for vacuum cleaners, which can be installed in front of the turbine without the formation of combustible dust, which can lead to an engine fire.
Uppgiften löses enligt uppfinningen med ett luktfilter för dammsugare, som är anordnat efter dammfiltret och före turbi- nen och vilket på en luftgenomsläpplig bärare innehåller syntetiskt framställda kulformiga aktiva kol (i det följande betecknade "kulkol") med en diameter mellan 0,1 och 2 mm eller påtryckta små högar av bundet pulverformigt aktivt kol med en diameter och en höjd av 0,2 till 1 mm (i det följande betecknat “koltryck").The object is solved according to the invention with an odor filter for vacuum cleaners, which is arranged after the dust filter and before the turbine and which on an air-permeable carrier contains synthetically produced spherical activated carbon (hereinafter referred to as "ball carbon") with a diameter between 0.1 and 2 mm or printed small piles of bound powdered activated carbon with a diameter and a height of 0.2 to 1 mm (hereinafter referred to as "carbon pressure").
Enligt en föredragen utföringsform av uppfinningen har kul- kolet en inre yta av minst 900 m2/g och framställdes genom karbonisering och aktivering av jonbytare.According to a preferred embodiment of the invention, the carbon has an inner surface of at least 900 m2 / g and was produced by carbonation and activation of ion exchangers.
Sådana aktiva kol beskrives exempelvis i DD-B 063 768, DE-A-43 04 026, DE-A-43 28 28, GB-B-1 525 420, GB-B-2 012 257, GB-A-2 025 385, GB-A-2 053 176, US-A-4 040 990, US-A-4 224 415, US-A-4 857 243 och US-A-4 957 897.Such activated carbons are described, for example, in DD-B 063 768, DE-A-43 04 026, DE-A-43 28 28, GB-B-1 525 420, GB-B-2 012 257, GB-A-2 025 385, GB-A-2 053 176, US-A-4 040 990, US-A-4 224 415, US-A-4 857 243 and US-A-4 957 897.
Detta kulkol har den avgörande fördelen att det å ena sidan är kulformigt och á andra sidan har en mycket hård yta. På grund av den sfäriska formen hos kulkolet är beröringsytan, i 508 427 3 den mån de på grund av vibrationer skulle nöta mot varandra, ytterst liten jämfört med konventionellt aktivt kol. Under begreppet "aktivt kol" avses här liksom i det följande för- kolat och därefter aktiverat material, som härrör från vege- tabiliska (trä, torv, etc.) eller animaliska (blod, ben) råmaterial.This ball carbon has the decisive advantage that on the one hand it is spherical and on the other hand it has a very hard surface. Due to the spherical shape of the carbon carbon, the contact surface, insofar as they would wear against each other due to vibrations, is extremely small compared to conventional activated carbon. The term "activated carbon" here, as in the following, refers to charred and subsequently activated material, which is derived from vegetable (wood, peat, etc.) or animal (blood, bone) raw materials.
Av kulkolet bildas dessutom på grund av den hårda ytan prak- tiskt taget inget avnött material.In addition, virtually no worn material is formed from the ball carbon due to the hard surface.
En ytterligare fördel vid användning av detta kulkol är att det jämfört med konventionellt aktivt kol icke uppvisar några makroporer utan så gott som endast mikroporer. Makroporer har en diameter mellan 100 och 50.000 nm; mikroporer har däremot endast en diameter av 0,3 till 2 nm. Sålunda kan dammpartik- lar, som icke kvarhålles av dammfiltret, icke igensätta mikroporerna i kulkolet på grund av deras större diameter; adsorptionsförmågan hos kulkolet vad beträffar luktintensiva ämnen bibehålles väsentligt längre än hos aktivt kol, efter- som hos det sistnämnda makroporerna mycket snabbt igensättes av de finaste dammpartiklarna och endast mycket få mikroporer kvarstår.A further advantage of using this carbon charcoal is that compared to conventional activated carbon it has no macropores but virtually only micropores. Macropores have a diameter between 100 and 50,000 nm; micropores, on the other hand, have a diameter of only 0.3 to 2 nm. Thus, dust particles which are not retained by the dust filter cannot clog the micropores in the carbon coal due to their larger diameter; The adsorption capacity of the carbon carbon with respect to odor-intensive substances is maintained considerably longer than with activated carbon, since in the latter the macropores are very quickly clogged by the finest dust particles and only very few micropores remain.
Påföringen av kulkol på en luftgenomsläpplig bärare beskrives exempelvis i DE-A-33 04 349, DE-A-38 13 563, US-A-4 510 193 och EP-B-118 618.The application of carbon carbon to an air-permeable carrier is described, for example, in DE-A-33 04 349, DE-A-38 13 563, US-A-4,510,193 and EP-B-118,618.
Vidare kan även alla andra nötningsbeständiga korn- och form- kol, i synnerhet sådana med en inre yta av mer än 900 m2/g, användas.Furthermore, all other abrasion-resistant barley and molded carbons, in particular those with an internal surface area of more than 900 m2 / g, can also be used.
Hos koltrycket kan det pulverformiga aktiva kolet ha en par- tikelstorlek av 0,1 till 50 um, företrädesvis 3 till 10 pm.At the carbon pressure, the powdered activated carbon may have a particle size of 0.1 to 50 μm, preferably 3 to 10 μm.
Koltrycket kan vidare ha en bindemedelsandel av 20 till 100 viktdelar, beräknat på det pulverformiga aktiva kolet. Binde- medlet kan härvid vara ett polyakrylat. 508 427 4 Koltrycket och ett förfarande för dess framställning beskri- ves exempelvis i EP-B-090 073 och US-A-4 455 187. Koltrycket har den avgörande fördelen att beröringsytan på grund av formen av "små högar" praktiskt taget kan försummas, eftersom dessa små högar även vid starka vibrationer icke nöter mot varandra. Dessutom kan avståndet mellan de enskilda smà högarna med lämpliga schabloner hos rotationsduktryckanlägg- ningen noggrant inställas pà ett i förväg bestämt värde.The carbon pressure may further have a binder content of 20 to 100 parts by weight, based on the powdered activated carbon. The binder can be a polyacrylate. The carbon pressure and a process for its production are described, for example, in EP-B-090 073 and US-A-4 455 187. The carbon pressure has the decisive advantage that the contact surface can be practically neglected due to the shape of "small piles". , because these small piles do not wear against each other even in strong vibrations. In addition, the distance between the individual small piles with suitable stencils of the rotary canvas printing plant can be accurately set to a predetermined value.
Vidare har koltrycket liksom kulkolet en mycket hård yta och är därmed mycket nötningsbeständigt. Därför kan inget farligt koldamm bildas.Furthermore, the carbon pressure, like the ball carbon, has a very hard surface and is thus very abrasion resistant. Therefore, no dangerous coal dust can be formed.
En ytterligare fördel vid användningen av koltrycket är den förhållandevis goda okänsligheten mot stendamm.An additional advantage of using the carbon pressure is the relatively good insensitivity to rock dust.
Enligt en föredragen utföringsform av uppfinningen är lukt- filtret utformat såsom säck, som omsluter dammfiltret. Damm- filtret, som för de flesta dammsugare består av papper, är vanligen med sin inloppsöppning pålimmad på en pappring eller ett stycke papper med cirkelformig öppning, vilken inskjutes i en hållare. Denna säck kan vara utformad på sådant sätt, att den kan vikas över filterbehållaren och exempelvis med ett kontakthäftande band eller en kardborrförslutning insnö- ras något bakom papperssäckens inloppsöppning.According to a preferred embodiment of the invention, the odor filter is designed as a bag, which encloses the dust filter. The dust filter, which for most vacuum cleaners consists of paper, is usually glued with its inlet opening to a paper ring or a piece of paper with a circular opening, which is inserted into a holder. This bag can be designed in such a way that it can be folded over the filter container and, for example, with a pressure-sensitive tape or a velcro closure, is tapered slightly behind the inlet opening of the paper bag.
Härigenom förstöras ytan av filtret enligt uppfinningen väsentligt, vilket minskar luftmotstàndet och ökar adsorp- tionseffekten.As a result, the surface of the filter according to the invention is significantly destroyed, which reduces the air resistance and increases the adsorption effect.
Luktfiltret kan vidare vara återanvändbart efter tömning eller avlägsnande av dammfiltret.The odor filter may further be reusable after emptying or removing the dust filter.
Den luftgenomsläppliga bäraren kan väljas från gruppen av papper eller textila skiktmaterial, såsom väv, virkade eller stickade varor eller fiberflor. 508 427 5 Kulkolet kan fixeras med en vidhäftningsmassa på den luft- genomsläppliga bäraren.The air permeable carrier can be selected from the group of paper or textile layer materials, such as fabrics, crocheted or knitted fabrics or nonwovens. 508 427 The ball carbon can be fixed with an adhesive on the air-permeable carrier.
Vidhäftningsmassan kan páföras punktformigt på det luftgenom- släppliga materialet.The adhesive can be applied pointwise to the air-permeable material.
I synnerhet kan genom en speciell anordning av dessa små punkter av vidhäftningsmassa de enskilda kulkolpartiklarna anbringas med tillräckligt avstånd från varandra, så att de alls icke kan beröra varandra.In particular, by means of a special arrangement of these small points of adhesive mass, the individual ball carbon particles can be applied at a sufficient distance from each other so that they can not touch each other at all.
Vidhäftningsmassan kan emellertid även täcka fibrerna hos ett stormaskigt stickat eller virkat material eller flormaterial.However, the adhesive mass can also cover the fibers of a large mesh knitted or crocheted material or woven material.
För detta ändamål pàföres vidhäftningsmassan på det luft- genomsläppliga materialets hela yta, avstrykes och blàses eventuellt med en lämplig anordning, företrädesvis en slits- dysa, genom de fria ställena av det luftgenomsläppliga mate- rialet. Genom genomblåsningen förstöres "fönstren".For this purpose, the adhesive mass is applied to the entire surface of the air-permeable material, wiped off and possibly blown with a suitable device, preferably a slit nozzle, through the free places of the air-permeable material. The blow-through destroys the "windows".
Därefter bemänges fibrerna med kulkol.Then the fibers are mixed with ball carbon.
Såsom vidhäftningsmassa kan man använda ett lösningsmedels- fattigt tvåkomponentsystem, företrädesvis ett förpolymert lösningsmedelsfattigt system. De sistnämnda har en god utgångsvidhäftning och uppvisar för det mesta under förnät- ningsfasen ett utpräglat viskositetsminimum, vilket leder till en optimal vidhäftning. Förpolymera lösningsmedelsfat- tiga system föres i handeln exempelvis av Bayer AG under beteckningen "High Solids". Limmet páföres företrädesvis i överskott på det luftgenomsläppliga materialet och avstrykes, och därefter beströs materialet med kulkol och limmet härdas.As the adhesive mass, a solvent-poor two-component system can be used, preferably a prepolymer-solvent-poor system. The latter have a good initial adhesion and mostly show a pronounced viscosity minimum during the crosslinking phase, which leads to an optimal adhesion. Prepolymer-poor solvent systems are marketed, for example, by Bayer AG under the name "High Solids". The adhesive is preferably applied in excess to the air permeable material and spread, and then the material is sprinkled with charcoal and the adhesive is cured.
Enligt en ytterligare utföringsform enligt uppfinningen är den luftgenomsläppliga bäraren bemängd på båda sidor med kul- kol eller med koltryck. Härigenom kan man uppnå kolbemäng- 508 427 ningar av upp till 500 g/m2.According to a further embodiment of the invention, the air-permeable carrier is loaded on both sides with carbon carbon or with carbon pressure. In this way it is possible to achieve carbon volumes of up to 500 g / m2.
Enligt en föredragen utföringsform av uppfinningen täcker kulkolet ytan av den skiktformiga bäraren till 30 till 70 %; koltrycket kan täcka ytan av den skiktformiga bäraren till 30 till 70 %.According to a preferred embodiment of the invention, the ball carbon covers the surface of the layered support to 30 to 70%; the carbon pressure can cover the surface of the layered support to 30 to 70%.
Enligt en ytterligare utföringsform av uppfinningen är lukt- filtret anordnat före utsugningsslitsen i filterrummet, dvs. det rum i vilket dammfiltret förefinnes, företrädesvis såsom ett ytbildande material (skiktmaterial) eller i remsform.According to a further embodiment of the invention, the odor filter is arranged before the extraction slot in the filter space, i.e. the space in which the dust filter is present, preferably as a surface-forming material (layer material) or in strip form.
I synnerhet kan det vara ett med kulkol bemängt storporigt retikulärt PU-skum.In particular, it can be a charcoal-laden large-pore reticular PU foam.
Kulkolet är enligt en föredragen utföringsform enligt uppfin- ningen inarbetat i PU-skummet, exempelvis enligt DE-A-38 13 563.According to a preferred embodiment according to the invention, the carbon coal is incorporated in the PU foam, for example according to DE-A-38 13 563.
Enligt en ytterligare utföringsform enligt uppfinningen är framför luktfiltret dessutom ett findammfilter anordnat, vars uppgift är att hålla kvar det finaste dammet, som passerar genom filterpàsen.According to a further embodiment of the invention, a fine dust filter is also arranged in front of the odor filter, the task of which is to retain the finest dust which passes through the filter passage.
Findammfiltret kan i synnerhet vara ett HEPA-filter (= high efficiency particle arrestance filter).The fine dust filter can in particular be a HEPA filter (= high efficiency particle arrestance filter).
Claims (15)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4413604 | 1994-04-19 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| SE9501409D0 SE9501409D0 (en) | 1995-04-18 |
| SE9501409L SE9501409L (en) | 1995-10-20 |
| SE508427C2 true SE508427C2 (en) | 1998-10-05 |
Family
ID=6515883
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE9501409A SE508427C2 (en) | 1994-04-19 | 1995-04-18 | Odor filter for vacuum cleaner |
Country Status (7)
| Country | Link |
|---|---|
| JP (1) | JPH0866341A (en) |
| DE (1) | DE19513658B4 (en) |
| FR (1) | FR2718632B1 (en) |
| GB (1) | GB2288749A (en) |
| IT (1) | IT1273542B (en) |
| NL (1) | NL1000078C2 (en) |
| SE (1) | SE508427C2 (en) |
Families Citing this family (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004009956A1 (en) * | 2004-03-01 | 2005-09-29 | Eurofilters N.V. | Adsorbent for dust collection filter, dust collection filter and method for odor adsorption |
| KR100453018B1 (en) * | 1995-11-24 | 2005-01-25 | 코닌클리케 필립스 일렉트로닉스 엔.브이. | Vacuum cleaner with directional filter |
| DE19615209C1 (en) * | 1996-04-18 | 1997-12-18 | Sandler Helmut Helsa Werke | Vacuum cleaner bag |
| US6090184A (en) | 1998-02-27 | 2000-07-18 | Hmi Industries, Inc. | Filter system |
| DE19935355A1 (en) * | 1999-01-07 | 2000-07-13 | Vorwerk Co Interholding | Dust filter bag for a vacuum cleaner |
| DE10030958B8 (en) * | 1999-07-29 | 2013-11-28 | Vorwerk & Co. Interholding Gmbh | Vacuum cleaning method and dust filter bag for a vacuum cleaner |
| AU6830800A (en) * | 1999-07-29 | 2001-02-19 | Vorwerk & Co. Interholding Gmbh | Method for vacuum-cleaning using a hand vacuum cleaner and dust filter bags or dust collection compartment, especially for use in a method of this type |
| DE10013949A1 (en) * | 2000-03-21 | 2001-09-27 | Mhb Filtration Gmbh & Co Kg | Filter material used for purifying air streams containing acidic or basic gaseous materials consists of a carrier layer connected to a first adsorbing layer, and a second additional adsorbing layer |
| US6488744B2 (en) | 2001-03-19 | 2002-12-03 | Hmi Industries, Inc. | Filter system |
| US7018438B2 (en) | 2002-03-29 | 2006-03-28 | Hmi Industries, Inc. | Filtering system |
| ITMO20040275A1 (en) * | 2004-10-19 | 2005-01-19 | Soteco Spa | ASPIERANT APPARATUS. |
| DE202004017544U1 (en) * | 2004-11-12 | 2004-12-30 | Melitta Haushaltsprodukte Gmbh & Co. Kg | bag |
| EP1674014B1 (en) | 2004-12-24 | 2017-06-07 | Aktiebolaget Electrolux | Vacuum cleaner filter bag with odour removing effect |
| US7615109B2 (en) | 2005-06-10 | 2009-11-10 | Electrolux Home Care Products, Inc. | Sodium bicarbonate vacuum bag inserts |
| DE102007012743A1 (en) | 2007-03-16 | 2008-09-18 | Neenah Gessner Gmbh | Odor-absorbing sheet, process for its preparation and use of zinc ricinoleate in finely divided solid form on odor-absorbing fabrics |
| CN102470304B (en) | 2009-07-22 | 2016-01-20 | 唐纳森公司 | PTFE film and carbon mesh sheet is used to be used for the filter medium structure of HEPA efficiency and smell control |
| DE102011002312A1 (en) * | 2011-04-28 | 2012-10-31 | Friedrich-Alexander-Universität Erlangen-Nürnberg | Filtering medium for use in filter element for combustion engine, has porous support coated with particles, where surface coating with particles lies in specific range, and particles that are not partly covered with bonding agent |
| DE102015012792A1 (en) | 2015-10-05 | 2017-04-06 | Mistervac Ohg | Vacuum Cleaner Bags |
| US11027231B2 (en) | 2016-11-17 | 2021-06-08 | 3M Innovative Properties Company | Air filter with visual filter life indicator zone and sorbent-loaded visual reference zone |
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| DD63768A (en) * | ||||
| NL241315A (en) * | 1958-07-18 | |||
| US4040990A (en) * | 1975-02-18 | 1977-08-09 | Rohm And Haas Company | Partially pyrolyzed macroporous polymer particles having multimodal pore distribution with macropores ranging from 50-100,000 angstroms |
| JPS5230799A (en) * | 1975-09-04 | 1977-03-08 | Sumitomo Chem Co Ltd | Method for production of porous carbon |
| JPS565313A (en) * | 1979-06-26 | 1981-01-20 | Kureha Chem Ind Co Ltd | Detoxificating spherical active carbon and preparing the same |
| JPS5489010A (en) * | 1977-12-27 | 1979-07-14 | Kureha Chem Ind Co Ltd | Spherical activated charcoal antidote |
| JPS5510971A (en) * | 1978-07-12 | 1980-01-25 | Sumitomo Chemical Co | Blood purifying device |
| DE3211322A1 (en) * | 1982-03-27 | 1983-09-29 | Hasso von 4000 Düsseldorf Blücher | AREA FILTER AND METHOD FOR THE PRODUCTION THEREOF |
| DE3304349C3 (en) * | 1983-02-09 | 1995-10-26 | Bluecher Hubert | Surface filter and process for its manufacture |
| GB2147799B (en) * | 1983-10-14 | 1987-02-04 | Marshall D A G | Vacuum cleaner with a filter |
| DE3510209A1 (en) * | 1985-03-21 | 1986-09-25 | Hasso von 4000 Düsseldorf Blücher | MICROBULES FROM ACTIVE CARBON AND METHOD FOR THE PRODUCTION THEREOF |
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1995
- 1995-04-06 NL NL1000078A patent/NL1000078C2/en not_active IP Right Cessation
- 1995-04-11 DE DE19513658A patent/DE19513658B4/en not_active Expired - Fee Related
- 1995-04-12 GB GB9507567A patent/GB2288749A/en not_active Withdrawn
- 1995-04-12 IT ITMI950749A patent/IT1273542B/en active IP Right Grant
- 1995-04-18 SE SE9501409A patent/SE508427C2/en not_active IP Right Cessation
- 1995-04-18 JP JP7117919A patent/JPH0866341A/en active Pending
- 1995-04-18 FR FR9504588A patent/FR2718632B1/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| FR2718632A1 (en) | 1995-10-20 |
| NL1000078A1 (en) | 1995-10-19 |
| GB9507567D0 (en) | 1995-05-31 |
| SE9501409L (en) | 1995-10-20 |
| JPH0866341A (en) | 1996-03-12 |
| DE19513658B4 (en) | 2004-12-02 |
| SE9501409D0 (en) | 1995-04-18 |
| ITMI950749A0 (en) | 1995-04-12 |
| DE19513658A1 (en) | 1995-10-26 |
| ITMI950749A1 (en) | 1996-10-12 |
| NL1000078C2 (en) | 1996-04-22 |
| FR2718632B1 (en) | 1997-07-18 |
| IT1273542B (en) | 1997-07-08 |
| GB2288749A (en) | 1995-11-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| NUG | Patent has lapsed |