EP0306814A1 - Procédé de traitement de l'eau d'une piscine - Google Patents

Procédé de traitement de l'eau d'une piscine Download PDF

Info

Publication number
EP0306814A1
EP0306814A1 EP88114181A EP88114181A EP0306814A1 EP 0306814 A1 EP0306814 A1 EP 0306814A1 EP 88114181 A EP88114181 A EP 88114181A EP 88114181 A EP88114181 A EP 88114181A EP 0306814 A1 EP0306814 A1 EP 0306814A1
Authority
EP
European Patent Office
Prior art keywords
water
pump
turbidity
degree
basin
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Withdrawn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
EP88114181A
Other languages
German (de)
English (en)
Inventor
Fritz Dipl.-Ing. Bergmann
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0306814A1 publication Critical patent/EP0306814A1/fr
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H4/00—Swimming or splash baths or pools
    • E04H4/12—Devices or arrangements for circulating water, i.e. devices for removal of polluted water, cleaning baths or for water treatment
    • E04H4/1209—Treatment of water for swimming pools

Definitions

  • the invention relates to a method for treating the water of a swimming pool, with which water emerging from the pool is pumped back into the pool by means of at least one pump driven by a variable-speed electric motor via at least one filter device, and with which the speed the electric motor driving the pump is adjusted by a measuring device that detects the degree of turbidity of the water (DE-OS 26 45 183).
  • All public and private swimming pools are operated with such a method today.
  • the circulation of the water with simultaneous guidance over the filter device serves for disinfection, hygiene, safety and aesthetics.
  • the water of a swimming pool is polluted by bathers and especially from the surrounding area in the case of outdoor pools.
  • the degree of pollution of the water depends essentially on the number of bathers and the environmental influences. Contamination of the water is caused, among other things, by microorganisms or coloidally dissolved substances. Dirt and other contaminants, especially contaminants that are hazardous to health, must be removed from the water.
  • suitable materials such as flocculants, are fed to the filter device during operation using metering devices known per se. Chlorine and / or ozone are also used in a known manner to purify the water.
  • a bathing system with constant circulation of the bathing water is known.
  • the water left in the pool of the bathing system is circulated through a filter system by means of a circulation pump.
  • the water is passed through an outlet chamber belonging to a storage tank, the water level of which is kept constant.
  • the pressure of the water flowing to the circulating pump thus always remains the same and the filter system is subjected to constant pressure. Different demands on the bathing facility are not taken into account.
  • an electric motor with two stator windings is used to drive the pump, so that it can be operated at two speeds.
  • the switchover can, in addition to other possibilities, also be effected by a measuring device which detects the degree of turbidity of the water.
  • the measuring device can be arranged in the filter pipe system or in the basin itself. With this procedure, there is no continuous adjustment of the Pump capacity to the actual circumstances possible, but only two different pump capacities can be set. The lower pump output should lead to reduced noise.
  • the invention has for its object to provide a method with which the performance of the pump of a swimming pool can be continuously adapted to the respective conditions in a simple manner while maintaining a predetermined degree of purity of the water without the risk of overdosing or underdosing of chemicals.
  • this object is achieved by that additional water is withdrawn from the basin at at least one predetermined point below the water level and fed to the measuring device measuring the degree of turbidity of the water, which as an output variable supplies an electrical current proportional to the degree of turbidity, - That an adjustable in speed electric motor is used for driving the pump and - That the respective output variable of the measuring device is fed to a controller, through which the speed of the electric motor and thus the performance of the pump is regulated.
  • the degree of contamination of the water during bathing is recorded directly.
  • the water is removed from the pool at a predetermined point below the water level, where experience has shown that the turbidity of the water is greatest without the influence of coarser soiling.
  • the corresponding turbidity of the water is converted by the measuring device directly into a proportional output variable, according to which the performance of the pump is regulated. H. is continuously adapted to the circumstances.
  • the performance of the pump is thus automatically adjusted to the turbidity of the water caused by impurities such that the amount of water circulated is increased, for example in the event of greater turbidity, so that the water is cleaned more quickly.
  • the method therefore works with fully automatic control of the pump output without the number of bathers in the water having to be known.
  • this method can significantly reduce the overall energy consumption for the treatment of the water.
  • the cost of operating a swimming pool can be significantly reduced with this method.
  • a pool 1 of a swimming pool is so far filled with water that there is a constant overflow on the side edges.
  • the overflowing water reaches a splash water basin 2 via corresponding pipelines. From there it is pumped back into basin 1 by means of a pump 3 via a filter device 4.
  • the pump 3 is driven in known technology by an electric motor that is adjustable in speed.
  • a measuring device 5 is connected to the basin 1, to which water is supplied from the basin 1 via a pipeline 6 and is passed from the measuring device 5 to the splash water basin 2.
  • the measuring device 5 measures the turbidity of the water supplied to it in TE / F (turbidity units according to Formazin) and supplies an electrical current at its output A which is proportional to the measured degree of turbidity of the water.
  • the degree of turbidity must not exceed 0.5 TE / F.
  • a current of 0 to 20 mA is available, for example, at the output A of the measuring device 5, the 20 mA being able to correspond to the 0.5 TE / F.
  • Such measuring devices are available on the market. For example, they work with light using the backscattering method.
  • the water can be fed to the measuring device 5 discontinuously or, in a preferred embodiment, continuously.
  • the output variable of the measuring device 5 is fed to a controller 7, which can be a frequency converter, for example.
  • the pump 3 or its electric motor is connected to the controller 7, the speed of which is regulated depending on the degree of turbidity of the water or the output size of the measuring device 5. The performance of the pump 3 is thus automatically adjusted to the degree of turbidity or the contamination of the water contained in the pool 1.
  • Coarse contamination of the water in the basin 1 on its surface can be disregarded. In any case, they disappear over the overflow of the basin 1 after some time, since the pump output during bath operation is set to a minimum output of, for example, 30 m3 / hour is, which ensures a constant overflow.
  • the water for the measuring device 5 is therefore removed from the basin 1 at a certain water depth, in which experience has shown that the turbidity is the greatest - due to the movements of the water and the bathers. This is the case, for example, at a distance of 0.75 m from the water surface.
  • a pump 8 can also be controlled by the controller 7, with which chemicals or filter materials are metered into the filter device 4. The dosing then also takes place as a function of the degree of turbidity of the water in basin 1 and of the current delivery capacity of the pump 3.
  • a device for the filtration of liquids with the addition of filter aids, which are dosed in accordance with opacimeters, is in principle from DE-PS 974 466 known.
  • the water can in principle also be pumped out of the basin 1 with a pump 9, as can be seen from FIG. 2. This is particularly the case with older systems that do not have an overflow at the edges.
  • the pump 9 conveys the water back into the basin 1 after passing through the filter device 4.
  • the water can also be circulated both by overflow at the edges of the basin 1 with splash water basin 2 and by the pump 9.
  • a total of more than one of the pumps 3 and 9 can also be used.
  • a second filter device 10 is shown in FIG. All pumps 3 and 9 used are regulated by the controller 7 so that their performance is adapted to the respective requirements in accordance with the degree of turbidity of the water.
  • the filter devices 4 and 10 or all filter devices can also be equipped with pumps 8, by means of which the chemicals are metered in depending on the degree of turbidity of the water.
  • filter substances are added to the filter devices 4 and 10 via the pipelines.
  • a direct addition is shown in the drawings.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Water Supply & Treatment (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Filtration Of Liquid (AREA)
  • Treatment Of Water By Oxidation Or Reduction (AREA)
EP88114181A 1987-09-09 1988-08-31 Procédé de traitement de l'eau d'une piscine Withdrawn EP0306814A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3730220 1987-09-09
DE19873730220 DE3730220C1 (de) 1987-09-09 1987-09-09 Verfahren zur Aufbereitung des Wassers eines Schwimmbades

Publications (1)

Publication Number Publication Date
EP0306814A1 true EP0306814A1 (fr) 1989-03-15

Family

ID=6335586

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88114181A Withdrawn EP0306814A1 (fr) 1987-09-09 1988-08-31 Procédé de traitement de l'eau d'une piscine

Country Status (2)

Country Link
EP (1) EP0306814A1 (fr)
DE (1) DE3730220C1 (fr)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19639099A1 (de) * 1996-09-24 1998-03-26 Wilo Gmbh Kreiselmotorpumpe für Filteranlagen
EP1630422A2 (fr) 2004-08-26 2006-03-01 Pentair Pool Products, Inc. Procédé de contrôle et dispositif pour pomper avec vitesse variable
US8444394B2 (en) 2003-12-08 2013-05-21 Sta-Rite Industries, Llc Pump controller system and method
US8465262B2 (en) 2004-08-26 2013-06-18 Pentair Water Pool And Spa, Inc. Speed control
US8480373B2 (en) 2004-08-26 2013-07-09 Pentair Water Pool And Spa, Inc. Filter loading
US8500413B2 (en) 2004-08-26 2013-08-06 Pentair Water Pool And Spa, Inc. Pumping system with power optimization
US8564233B2 (en) 2009-06-09 2013-10-22 Sta-Rite Industries, Llc Safety system and method for pump and motor
US8573952B2 (en) 2004-08-26 2013-11-05 Pentair Water Pool And Spa, Inc. Priming protection
US8602743B2 (en) 2008-10-06 2013-12-10 Pentair Water Pool And Spa, Inc. Method of operating a safety vacuum release system
US8602745B2 (en) 2004-08-26 2013-12-10 Pentair Water Pool And Spa, Inc. Anti-entrapment and anti-dead head function
US8801389B2 (en) 2004-08-26 2014-08-12 Pentair Water Pool And Spa, Inc. Flow control
US9404500B2 (en) 2004-08-26 2016-08-02 Pentair Water Pool And Spa, Inc. Control algorithm of variable speed pumping system
US9556874B2 (en) 2009-06-09 2017-01-31 Pentair Flow Technologies, Llc Method of controlling a pump and motor
US9568005B2 (en) 2010-12-08 2017-02-14 Pentair Water Pool And Spa, Inc. Discharge vacuum relief valve for safety vacuum release system
US9885360B2 (en) 2012-10-25 2018-02-06 Pentair Flow Technologies, Llc Battery backup sump pump systems and methods
US10465676B2 (en) 2011-11-01 2019-11-05 Pentair Water Pool And Spa, Inc. Flow locking system and method
EP4306747A1 (fr) * 2022-07-15 2024-01-17 Geoloop Bädertechnik GmbH Installation de traitement d'eau de bain

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4437708A1 (de) * 1994-10-21 1996-05-09 Bodo Dipl Ing Klingenberger Verfahren und Vorrichtung zum belastungsabhängigen Betreiben einer Filteranlage in Schwimmbädern
ATE189290T1 (de) * 1996-03-27 2000-02-15 Bodo Klingenberger Verfahren und vorrichtung zum belastungsabhängigen betreiben einer filteranlage in schwimmbädern
DE29608287U1 (de) * 1996-05-08 1997-06-12 Haupt, Steffen, 01589 Riesa Mobile Ölservice-Station
DE19823842C2 (de) * 1998-05-29 2003-04-24 Wassertechnik Wertheim Gmbh Energieoptimierte Schwimmbeckenanlage
DE102007052520B4 (de) * 2007-10-31 2013-10-10 Ingenieurbüro für Wassertechnik GmbH Messsystem und Messverfahren zur Kontrolle und/oder Steuerung einer Wasseraufbereitung, insbesondere in einem Schwimmbad

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1434837A1 (de) * 1960-03-31 1970-12-17 Wilhelm Herschmann Badeanlage mit staendiger Umwaelzung des Badewassers
DE2645183A1 (de) * 1975-10-30 1977-05-12 Itt Ind Gmbh Deutsche Umwaelzpumpe
DE2828547A1 (de) * 1978-06-29 1980-01-03 Didier Werke Ag Verfahren zur steuerung oder regelung der beizbadzusammensetzung einer beizanlage

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE974446C (de) * 1952-10-29 1960-12-29 Schenk Filterbau Gmbh Einrichtung zur Fluessigkeitsfiltration unter Zusatz von Filterhilfsmitteln

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1434837A1 (de) * 1960-03-31 1970-12-17 Wilhelm Herschmann Badeanlage mit staendiger Umwaelzung des Badewassers
DE2645183A1 (de) * 1975-10-30 1977-05-12 Itt Ind Gmbh Deutsche Umwaelzpumpe
DE2828547A1 (de) * 1978-06-29 1980-01-03 Didier Werke Ag Verfahren zur steuerung oder regelung der beizbadzusammensetzung einer beizanlage

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
CHEMICAL PATENT INDEX, BASIC ABSTRACTS JOURNALS, Sektion Ch, Woche 8442, D 15, Nr. 84-261030/42, Derwent Publications Ltd, London, GB; & JP-A-59 160 508 (MEIDENSHA ELEC. MFG K.K.) 04-03-1983 *
SCHWIMBAD & SAUNA, Band 18, Nr. 10-11, Oktober/November 1986, Seiten 58-63, Stuttgart, DE; C.H. RUPP: "Kristallklares Wasser und Waldesluft" *

Cited By (51)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19639099A1 (de) * 1996-09-24 1998-03-26 Wilo Gmbh Kreiselmotorpumpe für Filteranlagen
US9328727B2 (en) 2003-12-08 2016-05-03 Pentair Water Pool And Spa, Inc. Pump controller system and method
US10642287B2 (en) 2003-12-08 2020-05-05 Pentair Water Pool And Spa, Inc. Pump controller system and method
US10416690B2 (en) 2003-12-08 2019-09-17 Pentair Water Pool And Spa, Inc. Pump controller system and method
US8444394B2 (en) 2003-12-08 2013-05-21 Sta-Rite Industries, Llc Pump controller system and method
US10409299B2 (en) 2003-12-08 2019-09-10 Pentair Water Pool And Spa, Inc. Pump controller system and method
US10289129B2 (en) 2003-12-08 2019-05-14 Pentair Water Pool And Spa, Inc. Pump controller system and method
US10241524B2 (en) 2003-12-08 2019-03-26 Pentair Water Pool And Spa, Inc. Pump controller system and method
US8540493B2 (en) 2003-12-08 2013-09-24 Sta-Rite Industries, Llc Pump control system and method
US9399992B2 (en) 2003-12-08 2016-07-26 Pentair Water Pool And Spa, Inc. Pump controller system and method
US10502203B2 (en) 2004-08-26 2019-12-10 Pentair Water Pool And Spa, Inc. Speed control
US10871163B2 (en) 2004-08-26 2020-12-22 Pentair Water Pool And Spa, Inc. Pumping system and method having an independent controller
US8602745B2 (en) 2004-08-26 2013-12-10 Pentair Water Pool And Spa, Inc. Anti-entrapment and anti-dead head function
US8801389B2 (en) 2004-08-26 2014-08-12 Pentair Water Pool And Spa, Inc. Flow control
US8840376B2 (en) 2004-08-26 2014-09-23 Pentair Water Pool And Spa, Inc. Pumping system with power optimization
US9051930B2 (en) 2004-08-26 2015-06-09 Pentair Water Pool And Spa, Inc. Speed control
US8573952B2 (en) 2004-08-26 2013-11-05 Pentair Water Pool And Spa, Inc. Priming protection
US11391281B2 (en) 2004-08-26 2022-07-19 Pentair Water Pool And Spa, Inc. Priming protection
US9404500B2 (en) 2004-08-26 2016-08-02 Pentair Water Pool And Spa, Inc. Control algorithm of variable speed pumping system
US9551344B2 (en) 2004-08-26 2017-01-24 Pentair Water Pool And Spa, Inc. Anti-entrapment and anti-dead head function
US11073155B2 (en) 2004-08-26 2021-07-27 Pentair Water Pool And Spa, Inc. Pumping system with power optimization
US10947981B2 (en) 2004-08-26 2021-03-16 Pentair Water Pool And Spa, Inc. Variable speed pumping system and method
US9605680B2 (en) 2004-08-26 2017-03-28 Pentair Water Pool And Spa, Inc. Control algorithm of variable speed pumping system
US10527042B2 (en) 2004-08-26 2020-01-07 Pentair Water Pool And Spa, Inc. Speed control
US10871001B2 (en) 2004-08-26 2020-12-22 Pentair Water Pool And Spa, Inc. Filter loading
US9777733B2 (en) 2004-08-26 2017-10-03 Pentair Water Pool And Spa, Inc. Flow control
US10731655B2 (en) 2004-08-26 2020-08-04 Pentair Water Pool And Spa, Inc. Priming protection
US9932984B2 (en) 2004-08-26 2018-04-03 Pentair Water Pool And Spa, Inc. Pumping system with power optimization
US10240604B2 (en) 2004-08-26 2019-03-26 Pentair Water Pool And Spa, Inc. Pumping system with housing and user interface
US10240606B2 (en) 2004-08-26 2019-03-26 Pentair Water Pool And Spa, Inc. Pumping system with two way communication
US8500413B2 (en) 2004-08-26 2013-08-06 Pentair Water Pool And Spa, Inc. Pumping system with power optimization
US8480373B2 (en) 2004-08-26 2013-07-09 Pentair Water Pool And Spa, Inc. Filter loading
US8465262B2 (en) 2004-08-26 2013-06-18 Pentair Water Pool And Spa, Inc. Speed control
AU2005204246B2 (en) * 2004-08-26 2011-02-10 Pentair Pool Products, Inc. Variable speed pumping system and method
US10415569B2 (en) 2004-08-26 2019-09-17 Pentair Water Pool And Spa, Inc. Flow control
EP1630422A2 (fr) 2004-08-26 2006-03-01 Pentair Pool Products, Inc. Procédé de contrôle et dispositif pour pomper avec vitesse variable
US10480516B2 (en) 2004-08-26 2019-11-19 Pentair Water Pool And Spa, Inc. Anti-entrapment and anti-deadhead function
EP1630422A3 (fr) * 2004-08-26 2008-12-10 Pentair Pool Products, Inc. Procédé de contrôle et dispositif pour pomper avec vitesse variable
US10724263B2 (en) 2008-10-06 2020-07-28 Pentair Water Pool And Spa, Inc. Safety vacuum release system
US8602743B2 (en) 2008-10-06 2013-12-10 Pentair Water Pool And Spa, Inc. Method of operating a safety vacuum release system
US9726184B2 (en) 2008-10-06 2017-08-08 Pentair Water Pool And Spa, Inc. Safety vacuum release system
US10590926B2 (en) 2009-06-09 2020-03-17 Pentair Flow Technologies, Llc Method of controlling a pump and motor
US9712098B2 (en) 2009-06-09 2017-07-18 Pentair Flow Technologies, Llc Safety system and method for pump and motor
US9556874B2 (en) 2009-06-09 2017-01-31 Pentair Flow Technologies, Llc Method of controlling a pump and motor
US8564233B2 (en) 2009-06-09 2013-10-22 Sta-Rite Industries, Llc Safety system and method for pump and motor
US11493034B2 (en) 2009-06-09 2022-11-08 Pentair Flow Technologies, Llc Method of controlling a pump and motor
US9568005B2 (en) 2010-12-08 2017-02-14 Pentair Water Pool And Spa, Inc. Discharge vacuum relief valve for safety vacuum release system
US10465676B2 (en) 2011-11-01 2019-11-05 Pentair Water Pool And Spa, Inc. Flow locking system and method
US10883489B2 (en) 2011-11-01 2021-01-05 Pentair Water Pool And Spa, Inc. Flow locking system and method
US9885360B2 (en) 2012-10-25 2018-02-06 Pentair Flow Technologies, Llc Battery backup sump pump systems and methods
EP4306747A1 (fr) * 2022-07-15 2024-01-17 Geoloop Bädertechnik GmbH Installation de traitement d'eau de bain

Also Published As

Publication number Publication date
DE3730220C1 (de) 1989-03-23

Similar Documents

Publication Publication Date Title
DE3730220C1 (de) Verfahren zur Aufbereitung des Wassers eines Schwimmbades
DE4437708A1 (de) Verfahren und Vorrichtung zum belastungsabhängigen Betreiben einer Filteranlage in Schwimmbädern
DE3650097T2 (de) Mischreaktor.
EP0326893A2 (fr) Lave-vaisselle
DE2520732C2 (de) Verfahren und Vorrichtung zur Steuerung der Bewegung einer Saugvorrichtung
DE2456011A1 (de) Vorrichtung und verfahren zur ueberwachung und steuerung der schwebstoff- freiheit von ruhebeckenueberlauffluessigkeit bei mechanischen trennverfahren fuer fluessig-feste phasen
CH647955A5 (en) Method of operating a filter system containing at least one circulating pump
DE202018102369U1 (de) Vorrichtung zur Aufbereitung von Badewasser mit einer Druckfilteranlage
DE19948549C1 (de) Schwimmschlammabzug
DE10310486A1 (de) Obengeführtes Rückflussleitungssystem
DE3902829A1 (de) Rueckspuelbarer filter
DE2940269C2 (de) Verfahren zur Reinigung des Badewassers bei einer im öffentlichen Bereich einsetzbaren Warmsprudelbeckenanlage (Whirlpool) und hierzu geeignete Vorrichtung
AT507169B1 (de) Verfahren und vorrichtung zur aufbereitung von badewasser
DE2645183A1 (de) Umwaelzpumpe
EP0805246B1 (fr) Procédé et dispositif pour le fonctionnement dépendant de la charge d'une installation de filtration pour piscines
DE60021200T2 (de) Verfahren zur entfernung von ablagerungen auf elektrodenoberflächen in elektrolysezellen von wasserdesinfektionssystemen und eine vorrichtung hierfür
DE3007783A1 (de) Verfahren und vorrichtung zum transport von lebenden wassertieren
DE102013103468B4 (de) Reinigen von Abwasser schwankender elektrolytischer Leitfähigkeit mittels Elektroflotation
WO2015158770A1 (fr) Procédé et dispositif d'hygiénisation de l'eau
DE2500616A1 (de) Verfahren zum biologischen reinigen von abwasser
DE4445637C2 (de) Anordnung zur Silberrückgewinnung
EP0828639A1 (fr) Procede et installation pour le traitement de vehicules
DE2517062A1 (de) Vorrichtung zum befuellen und/oder entleeren von werkzeugmaschinen mit bohroel-emulsionen oder anderen arbeitsfluessigkeiten
EP2078702A1 (fr) Appareil et procédé discontinu de nettoyage des eaux usées
CH671217A5 (fr)

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE FR GB LI LU NL SE

17P Request for examination filed

Effective date: 19890215

TCNL Nl: translation of patent claims filed
EL Fr: translation of claims filed
GBC Gb: translation of claims filed (gb section 78(7)/1977)
17Q First examination report despatched

Effective date: 19900406

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19910129