EP1088880A1 - Composition de combustible - Google Patents

Composition de combustible Download PDF

Info

Publication number
EP1088880A1
EP1088880A1 EP99117853A EP99117853A EP1088880A1 EP 1088880 A1 EP1088880 A1 EP 1088880A1 EP 99117853 A EP99117853 A EP 99117853A EP 99117853 A EP99117853 A EP 99117853A EP 1088880 A1 EP1088880 A1 EP 1088880A1
Authority
EP
European Patent Office
Prior art keywords
linear
use according
branched chain
acid
fuel oil
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Withdrawn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
EP99117853A
Other languages
German (de)
English (en)
Inventor
Dirk Packet
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.)
TotalEnergies Onetech Belgium SA
Original Assignee
Fina Research SA
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 Fina Research SA filed Critical Fina Research SA
Priority to EP99117853A priority Critical patent/EP1088880A1/fr
Priority to EP00960644A priority patent/EP1216288B1/fr
Priority to DE60002224T priority patent/DE60002224T2/de
Priority to AU72864/00A priority patent/AU7286400A/en
Priority to PCT/EP2000/008869 priority patent/WO2001019941A1/fr
Priority to KR1020027003126A priority patent/KR20020051918A/ko
Priority to JP2001523713A priority patent/JP2003509569A/ja
Priority to AT00960644T priority patent/ATE237665T1/de
Publication of EP1088880A1 publication Critical patent/EP1088880A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L10/00—Use of additives to fuels or fires for particular purposes
    • C10L10/08—Use of additives to fuels or fires for particular purposes for improving lubricity; for reducing wear
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L1/00—Liquid carbonaceous fuels
    • C10L1/10—Liquid carbonaceous fuels containing additives
    • C10L1/14—Organic compounds
    • C10L1/18—Organic compounds containing oxygen
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L1/00—Liquid carbonaceous fuels
    • C10L1/10—Liquid carbonaceous fuels containing additives
    • C10L1/14—Organic compounds
    • C10L1/18—Organic compounds containing oxygen
    • C10L1/19—Esters ester radical containing compounds; ester ethers; carbonic acid esters
    • C10L1/191—Esters ester radical containing compounds; ester ethers; carbonic acid esters of di- or polyhydroxyalcohols

Definitions

  • the present invention relates to a fuel oil composition comprising a diesel fuel oil and a fuel oil lubricity improver.
  • the invention further relates to the use of a composition as a diesel fuel oil lubricity improver.
  • ester additives are known for addition to hydrocarbon compositions for various purposes.
  • US 2993773 describes esters of alkenyl succinnic acid with a large variety of different alcohols. These esters are used to inhibit or prevent deposit-forming in hydrocarbon fuels.
  • GB 1065398 describes how the lubricity of aviation turbojet fuels might be improved using partial esters of a number of different polyhydric alcohols, especially an ester of a C36 dimer acid and sorbitan monooleate.
  • GB 1047493 is concerned with the addition of a lubricity additive to a lubricating oil in which the lubricity additive is a partial or mono ester of a dicarboxylic acid and an oil insoluble glycol such as the monoester of the C36 linoleic dimer acid and glycol.
  • Diesel fuel oils generally comprise petroleum middle distillate fuel oils which boil within the range of about 100°C to about 400°C. There has recently been a drive to reduce the sulphur content of such diesel fuels so as to reduce sulphur dioxide emissions for environmental reasons. As of October 1996, the EU imposed a maximum sulphur content for diesel fuel oil of 0.05% by weight. As a result of this, a problem has arisen in that preparation of low sulphur content fuel oils also reduces the content in the fuels of other components such as polyaromatics. The problem is that the lubricity of the fuel is reduced and this can lead to engine failure.
  • WO 94/17160 In order to overcome this problem, it has been proposed in WO 94/17160 to provide diesel fuel oil compositions with a lubricity improver additive.
  • Particular examples of such an additive disclosed in WO 94/17160 are glycerol monooleate esters and di-isodecyl adipate esters.
  • Glycerol monooleate esters are in commercial use as diesel fuel oil additives to enhance the lubricity of the diesel fuel oils.
  • EP-A-0773278 also addresses this problem, providing as a lubricity improver additive a hydroxy-substituted carboxylic acid or acid derivative such as ricinoleic acid or glycerol monoricinoleate.
  • the present invention is concerned with a new problem which arises with diesel fuel oil lubricity improvers such as glycerol monooleate.
  • diesel fuel oil lubricity improvers such as glycerol monooleate.
  • manufacturers recommend that the product be stored above 10°C. This is necessary because, at lower temperatures, the known diesel fuel oil lubricity improvers become unstable with a tendency to cloud or even freeze. The requirement to store at above 10°C to prevent these drawbacks is inconvenient and costly for customers who have to provide specialised storage facilities.
  • the present invention aims to overcome the drawbacks of the prior art.
  • the present invention provides use of a composition comprising an ester of a monocarboxylic acid and a polyhydric alcohol as a diesel fuel oil lubricity improver, wherein the monocarboxylic acid comprises a C 8 -C 24 linear or branched chain, saturated or unsaturated acid or a mixture thereof, and the polyhydric alcohol comprises an alcohol of the general formula: CR 1 R 2 R 3 R 4 , or a dimer, trimer or tetramer of the alcohol which is obtainable by condensation thereof, wherein R 1 , R 2 and R 3 are each independently a C 1 -C 12 linear or branched chain alkylol and R 4 is a linear or branched chain C 1 -C 12 alkyl or a linear or branched chain C 1 -C 12 alkylol.
  • the monocarboxylic acid comprises a C 8 -C 24 linear or branched chain, saturated or unsaturated acid or a mixture thereof
  • the polyhydric alcohol comprises an alcohol of the general
  • the present invention provides a fuel oil composition
  • a fuel oil composition comprising a diesel fuel oil having a sulphur content of no more than 0.05% by weight and a fuel oil lubricity improver comprising an ester of a monocarboxylic acid and a polyhydric alcohol as a diesel fuel oil lubricity improver
  • the monocarboxylic acid comprises a C 8 -C 24 linear or branched chain, saturated or unsaturated acid or a mixture thereof
  • the polyhydric alcohol comprises an alcohol of the general formula: CR 1 R 2 R 3 R 4 , or a dimer, trimer or tetramer of the alcohol which is obtainable by condensation thereof wherein R 1 , R 2 and R 3 are each independently a C 1 -C 12 linear or branched chain alkylol and R 4 is a linear or branched chain C 1 -C 12 alkyl or a linear or branched chain C 1 -C 12 alkylol.
  • esters of the present invention as a diesel fuel oil lubricity improver enables the product to be storable as a liquid at a temperature below 20°C, even at a temperature below -10°C.
  • the esters of the present invention possess ability comparable to the products currently on the market to improve the lubricity of diesel fuel oils. Accordingly, the need to use specialist storage facilities for the lubricity improvers is obviated.
  • the ester of the present invention preferably comprises a diester, which may be part of a mixture comprising a monoester and a diester, and optionally including higher esters such as a triester and a tetraester.
  • R 1 , R 2 and R 3 are preferably each independently a C 1 -C 4 linear or branched chain alkylol, more preferably CH 2 OH.
  • R 4 is preferably a C 1 -C 4 linear or branched chain alkyl or alkylol, such as CH 3 , CH 2 OH or CH 2 CH 3 . More preferably R 4 is an alkylol so as to increase the number of free -OH groups in the ester.
  • a particularly preferred alcohol component of the ester is pentaerythritol, although other alcohols such as trimethylolpropane (TMP) and trimethylolethane (TME)may be used. It is preferred that the ester has at least two free -OH groups.
  • the carboxylic acid component of the ester may be a linear or branched chain carboxylic acid which may be saturated or unsaturated and is preferably a C 12 -C 22 monocarboxylic acid.
  • the carboxylic acid has an iodine value of 40 to 180, preferably an iodine value above 60, more preferably above 70, as measured in accordance with the AOCS (American Oil Chemists Society) Official Method cd-1-25. It is preferred to use an unsaturated carboxylic acid, particularly as these are readily available and are often naturally-occurring.
  • Particularly useful unsaturated carboxylic acids include oleic acid, linoleic acid, linolenic acid, palmoleic acid, gadoleic acid, erucic acid and other unsaturated acids with 22 carbon atoms, and mixtures thereof.
  • the unsaturated carboxylic acid component may be selected from tall oil fatty acids, soybean fatty acids, rape seed fatty acids, sunflower seed fatty acids, fish oil and fatty acids, and cold fractionated tallow and palm oil fatty acids.
  • the monocarboxylic acid may be substituted, for example, by at least one hydroxyl group.
  • a suitable substituted monocarboxylic acid is ricinoleic acid.
  • the esters of the present invention such as the pentaerythritol esters, have a cold stability which is independent of the molar ratio of fatty acid to alcohol.
  • lubricity efficiency increases with a decrease in ratio of fatty acid to alcohol in both pentaerythritol and monoglycerides; in the monoglycerides the cold stability decreases whereas in the pentaerythritol esters it does not.
  • the amount of fuel oil lubricity improver used in the fuel oil is in the range 1 to 1000ppm, preferably in the range 10 to 500ppm, most preferably in the range 10 to 200ppm.
  • the ester of the present invention may be used as the diesel fuel oil lubricity improver in pure form or in mixture with other components such as the conventional diesel fuel oil lubricity improvers, such as glycerol monooleate.
  • the amount of ester of the present invention in such a mixture is in the range 60 to 100%wt, preferably in the range 80 to 100%wt, most preferably in the range 90 to 95%wt, especialy around 92%.
  • the properties of these mixtures are also improved over known lubricity improvers.
  • the fuel oil incorporated an amount of lubricity improver as set out in Table 1 below so as to compare the effectiveness of lubricity improvers according to the present invention with those of the prior art.
  • a High Frequency Reciprocating Rig (HFRR) test was carried out as described in D. Wei and H. Spikes, Wear, Vol. 111, No. 2, p. 217, 1986; and R. Caprotti, C. Bovington, W. Fowler and M. Taylor SAE paper 922183; SAE fuels and lubes. Meeting Oct. 1992; San Francisco, USA.
  • the present applicants are aiming for a wear scar diameter of less than 400 microns at a dosage level of 100ppm.
  • Lubricity improver A is a mixture of pentaerytritolmonooleate, pentaerytritoldioleate and pentaerytritoltrioleate including 39% diester.
  • the olein fraction used for the synthesis of this pentaerytritol ester and for the glycerolmonooleate was obtained by a cold fractionation of tallow fatty acids and has cloud point between 0°C and 6°C.
  • Lubricity improver B is a mixture of 92% of A and 8% of the glycerolmonooleate.
  • the monoglyceride and the lubricity improver A were synthesized with tall oil fatty acids.
  • Tall oil fatty acids as such are also included as comparative example.
  • Dosage level monoglyceride of tall oil fatty acids (comparative) Tall oil fatty acids A 0 ppm 552 552 552 50 ppm 507 n.a. 493 100 ppm 336 339 318 200 ppm n.a. n.a. 310
  • esters of the present invention have good lubricity improvement properties for diesel fuel oils and superior cold storage properties as compared with the lubricity improvers of the prior art.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Emergency Medicine (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Liquid Carbonaceous Fuels (AREA)
  • Solid Fuels And Fuel-Associated Substances (AREA)
EP99117853A 1999-09-10 1999-09-10 Composition de combustible Withdrawn EP1088880A1 (fr)

Priority Applications (8)

Application Number Priority Date Filing Date Title
EP99117853A EP1088880A1 (fr) 1999-09-10 1999-09-10 Composition de combustible
EP00960644A EP1216288B1 (fr) 1999-09-10 2000-09-07 Composition de carburant
DE60002224T DE60002224T2 (de) 1999-09-10 2000-09-07 Brennstoffzusammensetzung
AU72864/00A AU7286400A (en) 1999-09-10 2000-09-07 Fuel composition
PCT/EP2000/008869 WO2001019941A1 (fr) 1999-09-10 2000-09-07 Composition de carburant
KR1020027003126A KR20020051918A (ko) 1999-09-10 2000-09-07 연료 조성물
JP2001523713A JP2003509569A (ja) 1999-09-10 2000-09-07 燃料組成物
AT00960644T ATE237665T1 (de) 1999-09-10 2000-09-07 Brennstoffzusammensetzung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP99117853A EP1088880A1 (fr) 1999-09-10 1999-09-10 Composition de combustible

Publications (1)

Publication Number Publication Date
EP1088880A1 true EP1088880A1 (fr) 2001-04-04

Family

ID=8238962

Family Applications (2)

Application Number Title Priority Date Filing Date
EP99117853A Withdrawn EP1088880A1 (fr) 1999-09-10 1999-09-10 Composition de combustible
EP00960644A Expired - Lifetime EP1216288B1 (fr) 1999-09-10 2000-09-07 Composition de carburant

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP00960644A Expired - Lifetime EP1216288B1 (fr) 1999-09-10 2000-09-07 Composition de carburant

Country Status (7)

Country Link
EP (2) EP1088880A1 (fr)
JP (1) JP2003509569A (fr)
KR (1) KR20020051918A (fr)
AT (1) ATE237665T1 (fr)
AU (1) AU7286400A (fr)
DE (1) DE60002224T2 (fr)
WO (1) WO2001019941A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004026997A2 (fr) * 2002-09-20 2004-04-01 Unichema Chemie B.V. Composition lubrifiante
WO2005040315A1 (fr) * 2003-10-22 2005-05-06 Leuna Polymer Gmbh Melange d'additifs utilise comme constituant d'une formulation a base d'huile minerale

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1380635B1 (fr) 2002-07-09 2013-01-23 Clariant Produkte (Deutschland) GmbH Agent d'amélioration de l'écoulement à froid pour huiles combustibles d'origine animale ou végétale.
ATE370214T1 (de) * 2002-07-09 2007-09-15 Clariant Produkte Deutschland Oxidationsstabilisierte schmieradditive für hochentschwefelte brennstofföle
EP1408101A1 (fr) 2002-10-04 2004-04-14 Infineum International Limited Additifs et compositions d'huile combustible
DE102005002700A1 (de) 2005-01-19 2006-07-27 Cognis Deutschland Gmbh & Co. Kg Zusammensetzungen verwendbar als Biotreibstoff
DE102005002711A1 (de) * 2005-01-19 2006-07-27 Cognis Deutschland Gmbh & Co. Kg Herstellung und Verwendung von Monoglyceriden
PT2705125T (pt) 2011-05-06 2018-02-02 Oleon Agente melhorador de lubrificação
JP5850569B2 (ja) * 2011-12-28 2016-02-03 花王株式会社 軽油添加剤

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1405551A (fr) * 1963-07-16 1965-07-09 Exxon Research Engineering Co Additifs anti-usure destinés à améliorer l'onctuosité d'hydrocarbures liquides
US3672854A (en) * 1969-12-03 1972-06-27 Universal Oil Prod Co Middle distillate
US5378249A (en) * 1993-06-28 1995-01-03 Pennzoil Products Company Biodegradable lubricant
WO1997004044A1 (fr) * 1995-07-14 1997-02-06 Exxon Chemical Patents Inc. Additifs et compositions de carburant les contenant
EP0773278A1 (fr) * 1995-11-13 1997-05-14 Ethyl Petroleum Additives Limited Additif pour combustible
DE19614722A1 (de) * 1996-04-15 1997-10-16 Henkel Kgaa Kältestabiles Schmier- und Kraftstoffadditiv
EP0826765A1 (fr) * 1996-08-27 1998-03-04 Institut Francais Du Petrole Compositions d'additifs améliorant le pouvoir lubrifiant des carburants et carburants les contenant
WO1998011178A1 (fr) * 1996-09-13 1998-03-19 Exxon Research And Engineering Company Additif pour mazouts legers a base de polyolester
WO1998021293A1 (fr) * 1996-11-13 1998-05-22 Henkel Corporation Lubrifiants pour carburant diesel
FR2772783A1 (fr) * 1997-12-24 1999-06-25 Elf Antar France Additif d'onctuosite pour carburant

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1405551A (fr) * 1963-07-16 1965-07-09 Exxon Research Engineering Co Additifs anti-usure destinés à améliorer l'onctuosité d'hydrocarbures liquides
US3672854A (en) * 1969-12-03 1972-06-27 Universal Oil Prod Co Middle distillate
US5378249A (en) * 1993-06-28 1995-01-03 Pennzoil Products Company Biodegradable lubricant
WO1997004044A1 (fr) * 1995-07-14 1997-02-06 Exxon Chemical Patents Inc. Additifs et compositions de carburant les contenant
EP0773278A1 (fr) * 1995-11-13 1997-05-14 Ethyl Petroleum Additives Limited Additif pour combustible
DE19614722A1 (de) * 1996-04-15 1997-10-16 Henkel Kgaa Kältestabiles Schmier- und Kraftstoffadditiv
EP0826765A1 (fr) * 1996-08-27 1998-03-04 Institut Francais Du Petrole Compositions d'additifs améliorant le pouvoir lubrifiant des carburants et carburants les contenant
WO1998011178A1 (fr) * 1996-09-13 1998-03-19 Exxon Research And Engineering Company Additif pour mazouts legers a base de polyolester
WO1998021293A1 (fr) * 1996-11-13 1998-05-22 Henkel Corporation Lubrifiants pour carburant diesel
FR2772783A1 (fr) * 1997-12-24 1999-06-25 Elf Antar France Additif d'onctuosite pour carburant

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004026997A2 (fr) * 2002-09-20 2004-04-01 Unichema Chemie B.V. Composition lubrifiante
WO2004026997A3 (fr) * 2002-09-20 2004-05-21 Unichema Chemie Bv Composition lubrifiante
WO2005040315A1 (fr) * 2003-10-22 2005-05-06 Leuna Polymer Gmbh Melange d'additifs utilise comme constituant d'une formulation a base d'huile minerale
KR100749220B1 (ko) * 2003-10-22 2007-08-13 로이나 폴리머 게엠베하 미네랄 오일 조성물의 성분으로서의 첨가제 혼합물
EA011358B1 (ru) * 2003-10-22 2009-02-27 Лейна Полимер Гмбх Композиция минерального нефтетоплива, содержащая смесь присадок, способ ее получения и ее применение
US7776801B2 (en) 2003-10-22 2010-08-17 Leuna Polymer Gmbh Additive mixture as component of a mineral oil composition

Also Published As

Publication number Publication date
JP2003509569A (ja) 2003-03-11
KR20020051918A (ko) 2002-06-29
AU7286400A (en) 2001-04-17
EP1216288A1 (fr) 2002-06-26
EP1216288B1 (fr) 2003-04-16
DE60002224D1 (de) 2003-05-22
ATE237665T1 (de) 2003-05-15
DE60002224T2 (de) 2004-02-19
WO2001019941A1 (fr) 2001-03-22

Similar Documents

Publication Publication Date Title
US4826633A (en) Synthetic lubricant base stock of monopentaerythritol and trimethylolpropane esters
RU2161640C2 (ru) Топливная композиция и способ эксплуатации двигателя с воспламенением от сжатия
US5503761A (en) Technical pentaerythritol esters as lubricant base stock
US5024678A (en) Process for the prevention or reduction of deposits in carburetors, injection devices and similar devices of engines
DE69601458T2 (de) Zusätze und ölzusammenetzungen
US3287273A (en) Lubricity additive-hydrogenated dicarboxylic acid and a glycol
EP1216288B1 (fr) Composition de carburant
EP0773278B1 (fr) Additif pour combustible
EP1060234B1 (fr) Additifs a pouvoir lubrifiant pour compositions de diesel
EP0518567B1 (fr) Base lubrifiante synthétique formée à partir de mélanges d'acides dont une grande partie à chaínes ramifiées
US4227889A (en) Compression ignition fuels for use in diesel engine having anti-wear properties
JP4393625B2 (ja) 合成潤滑油基油
US4380498A (en) Sulfurized, transesterified oil additives and their use in a lubricating oil and a fuel
US3560387A (en) Lubricating oils
US5632785A (en) Fuel economy additives
US7789918B2 (en) Lubricity improving additive composition for low sulfur diesel fuel
US9745531B2 (en) Fuel lubricity additive
US4485044A (en) Sulfurized esters of polycarboxylic acids
EP0636681A2 (fr) Composition lubrifiante à faible émission de fumée pour moteurs à deux phases
US5507964A (en) Use of isopalmitic acid esters as lubricants for two-stroke engines
US6534453B2 (en) Light oil composition
CN115537242B (zh) 柴油抗磨剂组合物、其制备方法及柴油组合物
JP5068034B2 (ja) 燃料添加剤及び組成物
EP0005873A1 (fr) Composition d'huile d'hydrocarbure liquide contenant un ester d'un acide carboxylique insaturé
KR100686640B1 (ko) 윤활성 향상 첨가제

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 CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

AKX Designation fees paid
REG Reference to a national code

Ref country code: DE

Ref legal event code: 8566

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: 20010405