EP0688025A2 - Isolateur haute tension en céramique - Google Patents

Isolateur haute tension en céramique Download PDF

Info

Publication number
EP0688025A2
EP0688025A2 EP95108162A EP95108162A EP0688025A2 EP 0688025 A2 EP0688025 A2 EP 0688025A2 EP 95108162 A EP95108162 A EP 95108162A EP 95108162 A EP95108162 A EP 95108162A EP 0688025 A2 EP0688025 A2 EP 0688025A2
Authority
EP
European Patent Office
Prior art keywords
voltage insulator
insulator according
trunk
insulator
thickened
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.)
Granted
Application number
EP95108162A
Other languages
German (de)
English (en)
Other versions
EP0688025B1 (fr
EP0688025A3 (fr
Inventor
Martin Kuhl
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.)
Ceramtec GmbH
Original Assignee
Ceramtec GmbH
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 Ceramtec GmbH filed Critical Ceramtec GmbH
Publication of EP0688025A2 publication Critical patent/EP0688025A2/fr
Publication of EP0688025A3 publication Critical patent/EP0688025A3/xx
Application granted granted Critical
Publication of EP0688025B1 publication Critical patent/EP0688025B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B17/00—Insulators or insulating bodies characterised by their form
    • H01B17/14—Supporting insulators
    • H01B17/16—Fastening of insulators to support, to conductor, or to adjoining insulator
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B17/00—Insulators or insulating bodies characterised by their form
    • H01B17/38—Fittings, e.g. caps; Fastenings therefor
    • H01B17/40—Cementless fittings

Definitions

  • High-voltage insulators made of ceramic materials are mainly used in outdoor switchgear and overhead lines. They consist of an elongated insulating body, which is equipped with screens, for the formation of a creepage path that is adapted to the atmospheric conditions. The shields are molded onto the insulator trunk, the thickness of which is determined by the mechanical requirements. At the ends of the insulator or the insulator trunk there are metal caps, via which the force is transmitted from the insulator trunk to further components. High-voltage insulators are usually designed to be rotationally symmetrical if the asymmetry of the caps is avoided, for example, by means of individual webs; the isolator caps concentrically surround the ends of the isolator trunk.
  • the barrel diameter of the insulator decisive, but also the design of the trunk ends, the type of fastening of the metal caps to the trunk and the design and material of the metal caps as well as the type of mechanical stresses, which are principally tensile and compressive forces , Bending forces and torsional forces or combinations of these forces.
  • the constructions of the metal caps therefore depend on the prevailing type of stress.
  • the metal caps are placed on the insulator end to be reinforced and the gap between the insulator trunk and the metal cap is filled with a hardening cement material, such as different types of cement, lead or casting resin.
  • a hardening cement material such as different types of cement, lead or casting resin.
  • the insulator body ends are designed differently.
  • the ends of tensile long stabilizers (hanging insulators) are conical and glazed and are often fixed in the metal cap with a lead casting.
  • At post insulators subjected to bending and / or torsion are usually provided with cylindrical ends.
  • the ends can be rough in various ways, for example corrugated, split or corrugated.
  • Portland cement is mainly used as the cement material.
  • the bending strength of post insulators is strongly dependent on the ratio of putty depth to insulator trunk diameter.
  • Metal caps for hanging and support insulators mostly consist of galvanized cast iron, because these insulators do not require great accuracy in terms of the external dimensions.
  • the metal caps mostly consist of aluminum alloys, which have to be machined very precisely and no longer require additional corrosion protection after machining. In order to achieve the necessary precision of the insulator dimensions during the kiting of the caps, a relaxing effort for the positioning of the caps must be made.
  • the invention is therefore based on the object of providing a high-voltage insulator made of ceramic material which has precise dimensions and also maintains them, can be reinforced easily and quickly and in which no chemical reactions occur between the material components. Furthermore, the mechanical strength of the insulator material should be fully exploited with the insulator ends being as short as possible in the metal caps.
  • a rotationally symmetrical high-voltage insulator made of a ceramic material with shrink caps attached to the ends, which is characterized in that the ends of the iolator in the area of the joining surfaces are designed to be thickened by at least 1.05 times the diameter of the shank and that they are thickened thickened ends after the fire are cylindrical and machined on the front.
  • the metal cap With its cap end facing the insulator body, the metal cap can protrude beyond the thickened insulator end and can have a stop on its end face which is supported on the end face of the Iolator end.
  • a glazed channel and a phase of at least 1.5 mm high, preferably 2-5 mm high, can be provided between the metal cap and the insulator trunk and on the end faces of the insulator ends.
  • the thickened, mechanically processed insulator end and the inner surfaces of the metal caps can have a roughness R a of 0.5-100 ⁇ m, preferably 0.8-30 ⁇ m, particularly preferably 1-10 ⁇ m, and the channel can be filled with a sealant, for example silicone rubber.
  • the metal caps can be provided with flanges which have a groove for receiving a seal.
  • Metal caps can consist of cast aluminum, wrought aluminum alloys, corrosion-resistant steel materials or steel and cast materials with corrosion-protective surface coatings. Porcelain, ceramics containing aluminum oxide, zirconium silicate, cordierite and steatite materials are particularly suitable as ceramic materials.
  • Alumina porcelain was used to produce glazed, rotationally symmetrical test specimens 1 with thickened, mechanically machined ends 3, so-called shoulder bars.
  • the rod diameter d was 75 mm, the diameter D of the ends 3 95 mm.
  • the metal caps 2 consisted of a wrought aluminum alloy.
  • the ends 3 of the rods 1 were ground on the circumference and the end face after the fire and had a roughness Ra of 1.3 - to 2,5 ⁇ m.
  • the roughness R a of the metal caps 2 in the recess 6 was 1.2-1.5 ⁇ m.
  • the diameter of the recess 6 was smaller than the diameter D of the ends 3; their height H was 65 mm and the height h of the ends 3 60 mm, whereby a groove 7 is formed between the cap and the rod.
  • the metal caps were heated to 250 ° C, then placed on the ends of the rods and cooled to 25 ° C, whereby a metal-ceramic connection is formed by shrinking. Depending on the cap dimensions, a radial stress results in the ceramic, which can be calculated.
  • test specimens were subjected to a tensile test, the tensile forces F z acting in the direction of the arrow. Fracture values between 190 and 230 kN resulted, which corresponds to a tensile strength of the ceramic material of 43-52 N / mm2. These test specimens were always broken in the region of the channel 7, ie in the region of the transition from the trunk 8 to the thickened trunk end 3.
  • the test specimens were subjected to a bending strength test, the bending forces F B acting in the direction of the arrow and the relationship between radial stress and bending strength shown in FIG. 3.
  • the strength values between 50 and 100 N / mm2 come from test specimens, the breaking point of which is in the area of the shoulder 5 of the channel 7.
  • the low strength values ( ⁇ 20 N / mm2) are due to broken windows within the metal cap 2.
  • FIG. 3 shows a clear connection between bending strength and radial stress in the area of the connection point, without scattering, as observed in the prior art.
  • Figure 3 also shows that radial stresses that are> 40 N / mm2 are required for the technically interesting bending strengths. Investigations in the temperature range from -25 ° C to + 1 25 ° C, that is, a temperature interval of 150 ° confirmed the reproducibility of the measuring points in Figure 3, whereby a radial tension of 60N / mm2 was not undercut. It could thus be shown that shrink-fit metal caps on the ends of high-voltage insulators according to the features of the invention can also be used outdoors, where temperature differences in extreme climatic regions of up to 100 ° C. can be expected.
  • the trunk 8 is provided with molded shields 4.
  • the end 3 of the insulating body has a larger diameter D than the diameter d of the shank 8.
  • the length of the insulating body is brought to a precise level by grinding the outer peripheral surface of the end 3 and the end face of the end 3.
  • the metal cap 2 preferably consisting of an aluminum alloy or stainless steel, is arranged with radial tension on the ground end 3 of the insulating body.
  • the metal cap 2 can be provided with a circumferential stop 9 which rests on the end face of the end 3 of the insulating body when the insulating body is reinforced. In this way, a precise connection dimension of the isolator is achieved.
  • the assembly of the metal caps 2 is very simple. The heated metal caps are simply put on the ends of the insulator and then cool down in a few seconds to the point that the insulator can be handled immediately. After about 30 minutes, the insulator can already be checked mechanically without the metal caps setting.
  • the roughness of the joining surfaces of the shrink fit is of great importance, since the removal of the cap as a result of mechanical stress not only depends on the radial tension in the shrink fit, but also on the coefficient of friction between the joining surfaces.
  • a roughness R a of 1-10 ⁇ m has been found to be particularly advantageous in the aluminum / porcelain pairing.
  • Also of great importance in the case of hollow insulators is the sealing of components which are fastened to the porcelain hollow insulator. It has been shown that the roughness of the aluminum / porcelain pairing is 1-10 ⁇ m water- and gas-tight, so that seals 10 can also be arranged in a groove 13 in the flange 11 of the metal cap 2 (FIG. 4). However, seals 10 can also be arranged according to FIG. 5 on the end face of the end 3 of the insulating body.
  • the end 3 of the insulating body with a chamfer 12 of at least 1.5 mm in height, which includes an angle of 2-45 degrees, in particular 5-30 degrees, with the insulator axis .
  • the glazed channel 7 forms a predetermined breaking point due to its notch effect under high mechanical stress. Since the location of the predetermined breaking point from Overhang of the cap 2 depends, it is advisable to make the channel 7 as flat as possible and to provide it with a radius on the insulator trunk.
  • high-voltage insulators according to the invention can also be designed as full-body support insulators or as hanging insulators.
  • Other applications of the invention in high precision components, e.g. for switching and actuating rods for electrical high-voltage devices are possible.

Landscapes

  • Insulators (AREA)
  • Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
  • Electrostatic Separation (AREA)
  • Insulating Bodies (AREA)
  • Cable Accessories (AREA)
  • Discharge Heating (AREA)
  • Organic Insulating Materials (AREA)
  • Compositions Of Oxide Ceramics (AREA)
EP95108162A 1994-06-17 1995-05-29 Isolateur haute tension en céramique Expired - Lifetime EP0688025B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4421343 1994-06-17
DE4421343A DE4421343A1 (de) 1994-06-17 1994-06-17 Hochspannungsisolator aus Keramik

Publications (3)

Publication Number Publication Date
EP0688025A2 true EP0688025A2 (fr) 1995-12-20
EP0688025A3 EP0688025A3 (fr) 1996-01-10
EP0688025B1 EP0688025B1 (fr) 1998-08-05

Family

ID=6520910

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95108162A Expired - Lifetime EP0688025B1 (fr) 1994-06-17 1995-05-29 Isolateur haute tension en céramique

Country Status (8)

Country Link
US (1) US5977487A (fr)
EP (1) EP0688025B1 (fr)
JP (1) JPH087684A (fr)
AT (1) ATE169422T1 (fr)
BR (1) BR9502815A (fr)
CA (1) CA2152029A1 (fr)
DE (2) DE4421343A1 (fr)
ZA (1) ZA954979B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1995739A1 (fr) * 2007-05-23 2008-11-26 ABB Technology AG Isolateur haute tension et élément de refroidissement doté de cet isolateur haute tension
CN111599543A (zh) * 2020-06-29 2020-08-28 江西省萍乡电瓷电器厂 一种高度可调的绝缘子

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2765385B1 (fr) * 1997-06-26 2003-12-05 Gec Alsthom T & D Sa Ferrure d'isolateur composite
IT1299049B1 (it) * 1998-04-08 2000-02-07 Abb Research Ltd Isolatore particolarmente per linee elettriche di trasmissione e distribuzione, avente caratteristiche migliorate di resistenza alle
US6229094B1 (en) * 1998-11-16 2001-05-08 Hubbell Incorporated Torque prevailing crimped insulator fitting
US6811732B2 (en) * 2000-03-29 2004-11-02 Ngk Insulators, Ltd. Method for manufacturing polymer insulator
US6367774B1 (en) 2000-04-19 2002-04-09 Flowserve Corporation Element having ceramic insert and high-strength element-to-shaft connection for use in a valve
US6522256B2 (en) * 2000-05-16 2003-02-18 Southern Electric Equipment Hybrid current and voltage sensing system
JP4376174B2 (ja) * 2004-12-01 2009-12-02 日本碍子株式会社 ポリマーｓｐ碍子
WO2013104983A1 (fr) * 2012-01-13 2013-07-18 Trench Limited Procédé de fabrication de structures d'isolateurs en porcelaine et procédé et ensemble permettant de fixer des brides métalliques à des isolateurs en porcelaine
EP2637180A1 (fr) * 2012-03-06 2013-09-11 ABB Technology Ltd Isolateur de poteau
CN102689745B (zh) * 2012-05-14 2015-05-13 平高集团有限公司 柱形绝缘子的包装结构及包装方法
CN105914674B (zh) * 2016-06-07 2018-04-03 浙江华蕴海洋工程技术服务有限公司 一种电缆保护管

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3643651A1 (de) 1986-12-17 1988-06-30 Steuer Mess Regel Armaturen Gm Verfahren zum herstellen einer schrumpfverbindung zwischen mindestens zwei werkstuecken aus materialien unterschiedlicher ausdehnungskoeffizienten

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1031453A (en) * 1910-09-27 1912-07-02 Clouth Rhein Gummiwarenfabrik Insulator.
US1769262A (en) * 1926-06-30 1930-07-01 Condit Electrical Mfg Corp Oil-filled bushing
DE696142C (de) * 1936-05-24 1940-09-14 Porzellanfabrik Kahla Isolator, insbesondere Vollkernisolator, mit durch befestigten Metallkappen
US2924644A (en) * 1953-04-20 1960-02-09 Cox John Edward Electrical insulator links
DE1130024B (de) * 1957-11-15 1962-05-24 Siemens Ag Befestigung von Metallarmaturen an keramischen Isolatoren
GB1009571A (en) * 1961-03-01 1965-11-10 Pilkington Brothers Ltd Improvements in or relating to electrical insulators
GB8312892D0 (en) * 1983-05-11 1983-06-15 Raychem Ltd Electrical insulator
JP2664616B2 (ja) * 1993-03-25 1997-10-15 日本碍子株式会社 ノンセラミック碍子の気密構造

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3643651A1 (de) 1986-12-17 1988-06-30 Steuer Mess Regel Armaturen Gm Verfahren zum herstellen einer schrumpfverbindung zwischen mindestens zwei werkstuecken aus materialien unterschiedlicher ausdehnungskoeffizienten

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1995739A1 (fr) * 2007-05-23 2008-11-26 ABB Technology AG Isolateur haute tension et élément de refroidissement doté de cet isolateur haute tension
CN111599543A (zh) * 2020-06-29 2020-08-28 江西省萍乡电瓷电器厂 一种高度可调的绝缘子

Also Published As

Publication number Publication date
BR9502815A (pt) 1996-02-06
CA2152029A1 (fr) 1995-12-18
US5977487A (en) 1999-11-02
EP0688025B1 (fr) 1998-08-05
DE4421343A1 (de) 1995-12-21
EP0688025A3 (fr) 1996-01-10
ATE169422T1 (de) 1998-08-15
JPH087684A (ja) 1996-01-12
DE59503054D1 (de) 1998-09-10
ZA954979B (en) 1996-02-21

Similar Documents

Publication Publication Date Title
EP0688025B1 (fr) Isolateur haute tension en céramique
EP0545038B1 (fr) Parafoudre
DE3034579A1 (de) Hochspannungs-freiluft-kunststoffisolator und verfahren zu seiner herstellung
DE102006003576A1 (de) Überspannungsableiter mit Käfig-Design
WO2006125753A1 (fr) Coupe-circuit de surtension a cage
DE69500432T2 (de) Stangendurchführung, insbesondere für Transformator
DE3704410C2 (fr)
DE2551856C2 (fr)
EP0457081A1 (fr) Isolateur
EP0660480B1 (fr) Isolateur de support
DE2448705C2 (de) Endverschlußisolatorgarnitur für elektrische Starkstromkabel
EP0807310B1 (fr) Isolateur fixe par ciment et son procede de production
DE4335697C2 (de) Verfahren zur Herstellung einer hochvakuumdichten, aber spannungsarmen Fügestelle
EP0676842B1 (fr) Isolateur de support
DD139962A3 (de) Verfahren zur herstellung eines kunststoffisolators
EP0092548B1 (fr) Isolateur composite
EP1421661B1 (fr) Support isolant en forme de disque pour installation haute-tension a boitier prevu pour du triphase
DE69402862T2 (de) Verfahren zur herstellung von im wesentlichen hohlzylinderförmigen giesslingen und im wesentlichen hohlzylinderförmiger giessling
DE2624325A1 (de) Hochspannungsdurchfuehrung
DE19523074A1 (de) Stützisolator mit Elektrode
DE2323967A1 (de) Anschlusstueck fuer einen elektrischen anschluss
DE102017217163B4 (de) Elektrisches Betriebsmittel und Herstellungsverfahren für ein elektrisches Betriebsmittel
EP0197178B1 (fr) Méthode de fabrication de pistons en matière dure fragile
DE69322371T2 (de) Fester isolator und sein herstellungsverfahren
DE2302640C3 (de) Zündkerze

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

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH DE FR GB IT LI PT SE

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH DE FR GB IT LI PT SE

17P Request for examination filed

Effective date: 19960710

17Q First examination report despatched

Effective date: 19960910

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: CERAMTEC AG INNOVATIVE CERAMIC ENGINEERING

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE FR GB IT LI PT SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 19980805

Ref country code: GB

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19980805

REF Corresponds to:

Ref document number: 169422

Country of ref document: AT

Date of ref document: 19980815

Kind code of ref document: T

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: A. BRAUN, BRAUN, HERITIER, ESCHMANN AG PATENTANWAE

Ref country code: CH

Ref legal event code: EP

ET Fr: translation filed
REF Corresponds to:

Ref document number: 59503054

Country of ref document: DE

Date of ref document: 19980910

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19981105

GBV Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed]

Effective date: 19980805

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

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

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20020416

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20020502

Year of fee payment: 8

Ref country code: AT

Payment date: 20020502

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20020513

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 20020527

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20020723

Year of fee payment: 8

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030529

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030530

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030531

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030531

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030531

BERE Be: lapsed

Owner name: *CERAMTEC A.G. INNOVATIVE CERAMIC ENGINEERING

Effective date: 20030531

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20031202

EUG Se: european patent has lapsed
REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040130

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST