EP0226474B1 - Corrosion protection for the cap of an electrical suspension insulator - Google Patents

Corrosion protection for the cap of an electrical suspension insulator Download PDF

Info

Publication number
EP0226474B1
EP0226474B1 EP86400607A EP86400607A EP0226474B1 EP 0226474 B1 EP0226474 B1 EP 0226474B1 EP 86400607 A EP86400607 A EP 86400607A EP 86400607 A EP86400607 A EP 86400607A EP 0226474 B1 EP0226474 B1 EP 0226474B1
Authority
EP
European Patent Office
Prior art keywords
cap
dielectric
base
insulator
wall
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.)
Expired - Lifetime
Application number
EP86400607A
Other languages
German (de)
French (fr)
Other versions
EP0226474A1 (en
Inventor
Daniel De Decker
René Parraud
Serge Tartier
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.)
Societe Europeenne dIsolateurs en Verre et Composite SEDIVER SA
Original Assignee
Societe Europeenne dIsolateurs en Verre et Composite SEDIVER 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 Societe Europeenne dIsolateurs en Verre et Composite SEDIVER SA filed Critical Societe Europeenne dIsolateurs en Verre et Composite SEDIVER SA
Priority to AT86400607T priority Critical patent/ATE92208T1/en
Publication of EP0226474A1 publication Critical patent/EP0226474A1/en
Application granted granted Critical
Publication of EP0226474B1 publication Critical patent/EP0226474B1/en
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
    • H01B17/42—Means for obtaining improved distribution of voltage; Protection against arc discharges

Definitions

  • the present invention relates to a device for protecting an electric suspension insulator cover against corrosion, said cover being fixed to the head of a dielectric made of glass, porcelain, or synthetic insulating material.
  • the insulators concerned form suspension chains intended in particular for medium, high and very high voltage power transmission lines (150 kV, 250 kV for example).
  • Patent document FR-A-23 32 598 discloses an insulator whose fitting ends opposite the insulator by a sacrificial ring on which the effects of electrolytic corrosion are concentrated when a DC voltage is applied to this insulator .
  • a sacrificial ring is not capable of producing the effects of arcs, in particular when industrial frequencies are applied to the insulator.
  • the protection device according to the invention also has the enormous advantage of protecting the cover of the insulator against electrolytic corrosion by being corroded before it (according to the well-known principle of 'a sacrificed electrode).
  • an insulator 1 belonging to a suspension chain It comprises a glass dielectric 2, the skirt of which can be seen, and the head of which is sealed in a metal cover 3, provided with a zinc coating by a galvanizing treatment.
  • a metal rod 5 is fixed inside the head of the dielectric 2.
  • a piece 30 of zinc or aluminum of revolution is interposed between the base 6 of the cover 3 and the outer face 7 of the skirt of the dielectric 2 around the axis of the head of the insulator and having the shape of a solid torus with a projection wedged between said face 7 and said base 6.
  • This projection provides a central opening 11 making it possible to thread the part 30 on the head of the dielectric 2 before the fitting the cover 3.
  • the outer wall 31 of the part 30 has a curvature oriented towards the cover 3.
  • the structure according to the invention brings additional advantages.
  • the cover 3 has a positive polarity with respect to the dielectric 2, there is observed in the absence of part 30 a leakage current creating significant electrolytic corrosion at the base 6 of the cover 3.
  • the part 30 is in place, it is it which undergoes corrosion and thus protects the cover 3.
  • the part 30 is molded directly on the insulator with its sealed cover.
  • the dielectric can be glass or any synthetic insulating material, and the cover can be the end fitting of an organic insulator.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulators (AREA)
  • Cable Accessories (AREA)
  • Buffer Packaging (AREA)
  • Centrifugal Separators (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

An electrical insulator (1) of the type comprising at least one dielectric (2) and an iron or steel cap (3) fixed axially on the dielectric has a device for protecting the cap against corrosion as well as electric arcs. In one embodiment (FIGS. 1-3), the protection device comprises a zinc or aluminum part (10) shaped as a dish with a center hole (11) and outlet holes (12) for the egress of rainwater. The outside wall (13) of the part (10) curves upwardly toward the cap (3) and a portion of the part (10) is disposed between the base (6) of the cap (3) and the outer surface (7) of the dielectric (2). In another embodiment (FIG. 4), the protection device comprises a solid body of revolution (30) of semi-toroidal shape which is formed of zinc or aluminum and is cast directly around the base (6) of the cap (3) and has a thin flange extending between the base (6 )of the cap (3) and the outer surface (7) of the dielectric (2). The exterior surface (31) of the solid body of revolution (30) curves upwardly so as to provide between such exterior surface and the outer surface (7) of the dielectric (2) an area for the self-extinguishing of electric arcs.

Description

La présente invention concerne un dispositif de protection d'un capot d'isolateur électrique de suspension contre la corrosion, ledit capot étant fixé sur la tête d'un diélectrique en verre, en porcelaine, ou en matériau isolant synthétique. Les isolateurs concernés forment des chaînes de suspension destinées en particulier aux lignes de transport d'énergie électrique moyenne, haute et très haute tensions (150 kV, 250 kV par exemple).The present invention relates to a device for protecting an electric suspension insulator cover against corrosion, said cover being fixed to the head of a dielectric made of glass, porcelain, or synthetic insulating material. The insulators concerned form suspension chains intended in particular for medium, high and very high voltage power transmission lines (150 kV, 250 kV for example).

Lorsqu'un courant de fuite circule le long d'une chaîne d'isolateurs, ces derniers sont soumis à une activité d'arcs. Ces arcs prennent généralement naissance sur les parties métalliques, dans la zone de transition conducteur-isolant, c'est-à-dire, à la base du capot ou de la ferrure d'extrémité.When a leakage current flows along a chain of insulators, these are subjected to arcing activity. These arcs generally arise on the metal parts, in the conductor-insulator transition zone, that is to say, at the base of the cover or of the end fitting.

On connaît par le document de brevet FR-A-23 32 598 un isolateur dont la ferrure se termine en face de l'isolateur par un anneau sacrifié sur lequel les effets de corrosion électrolytique se concentrent lorsqu'on applique une tension continue à cet isolateur. Un tel anneau n'est cependant pas capable de produire les effets d'arcs, notamment lorsque des fréquences industrielles sont appliquées à l'isolateur.Patent document FR-A-23 32 598 discloses an insulator whose fitting ends opposite the insulator by a sacrificial ring on which the effects of electrolytic corrosion are concentrated when a DC voltage is applied to this insulator . However, such a ring is not capable of producing the effects of arcs, in particular when industrial frequencies are applied to the insulator.

On connaît, en outre, par le document de brevet GB-A-135 667 un isolateur de suspension ayant un capot qui est fixé sur la tête d'un diélectrique, un collier étant interposé entre la base de capot et le diélectrique en vue de réduire la concentration de lignes de force à cet endroit. Ce collier épouse fermément la surface du diélectrique et ne peut pas, de ce fait, éteindre un arc qui se développe entre ladite base et ledit diélectrique.We also know from patent document GB-A-135 667 a suspension insulator having a cover which is fixed on the head of a dielectric, a collar being interposed between the cover base and the dielectric in order to reduce the concentration of main lines at this point. This collar firmly adheres to the surface of the dielectric and cannot, therefore, extinguish an arc which develops between said base and said dielectric.

Enfin, on connaît par le document de brevet US-A-4.185.161 un isolateur muni de bourrelets métalliques qui servent à diffuser le champ électrique au niveau de l'interface métal/isolateur.
La protection des parties métalliques contre la corrosion est réalisée jusqu'à présent par une galvanisation de leur face externe. Mais les arcs prenant naissance sur les parties métalliques sont à l'origine d'une érosion de cette couche protectrice.
Les capots sont alors directement soumis aux agents corrosifs atmosphériques, ce qui a pour conséquence d'affaiblir les propriétés mécaniques de ces parties métalliques, et de polluer la surface de l'isolant par l'oxyde de fer ainsi créé par la corrosion.Finally, from the patent document US-A-4,185,161 there is known an insulator provided with metal beads which are used to diffuse the electric field at the metal / insulator interface.
The protection of the metal parts against corrosion has so far been achieved by galvanizing their external face. But the arcs arising on the metal parts are the cause of an erosion of this protective layer.
The covers are then directly subjected to atmospheric corrosive agents, which has the consequence of weakening the mechanical properties of these metal parts, and of polluting the surface of the insulator with the iron oxide thus created by corrosion.

Le but de la présente invention est de remédier à cette situation, sans modifier les caractéristiques suivantes de l'isolateur :

  • la tenue électrique en fréquence industrielle par temps sec et sous pluie,
  • la tenue aux chocs de la foudre,
  • le niveau de perturbations radio.
The object of the present invention is to remedy this situation, without modifying the following characteristics of the insulator:
  • electrical resistance at industrial frequency in dry weather and rain,
  • lightning shock resistance,
  • the level of radio interference.

Ce but est atteint par le dispositif tel que défini par la revendication 1. Une réalisation préférée de ce dispositif est définie dans la revendication 2.This object is achieved by the device as defined by claim 1. A preferred embodiment of this device is defined in claim 2.

On constate qu'un tel dispositif de protection permet de protéger la base des capots contre les pieds d'arcs et donc d'éviter leur corrosion, sans modifier les caractéristiques requises pour la tenue électrique par temps sec et sous pluie, la tenue à la foudre et le niveau de perturbations radio.It is found that such a protection device makes it possible to protect the base of the covers against the feet of arches and therefore to prevent their corrosion, without modifying the characteristics required for electrical resistance in dry weather and in rain, resistance to lightning and the level of radio interference.

Dans le cas de lignes électriques transportant du courant continu, le dispositif de protection selon l'invention a en outre l'énorme avantage de protéger le capot de l'isolateur contre la corrosion électrolytique en étant corrodé avant lui (selon le principe bien connu d'une électrode sacrifiée).In the case of electric lines carrying direct current, the protection device according to the invention also has the enormous advantage of protecting the cover of the insulator against electrolytic corrosion by being corroded before it (according to the well-known principle of 'a sacrificed electrode).

La présente invention sera décrite ci-après plus en détail à l'aide d'un mode de réalisation donné à titre illustratif mais nullement limitatif.The present invention will be described below in more detail using an embodiment given by way of illustration but in no way limiting.

Dans le dessin annexé :

  • la figure 1 est une vue en élévation semi-coupée d'un isolateur capottige muni d'un dispositif de protection selon l'invention,
  • la figure 2 est une vue agrandie en coupe d'un détail II de la figure 1.
In the attached drawing:
  • FIG. 1 is a semi-cut elevation view of a capottige insulator provided with a protection device according to the invention,
  • FIG. 2 is an enlarged sectional view of a detail II in FIG. 1.

On voit dans la figure 1 un isolateur 1 appartenant à une chaîne de suspension. Il comporte un diélectrique en verre 2 dont on voit la jupe, et dont la tête est scellée dans un capot métallique 3, muni d'un revêtement de zinc par un traitement de galvanisation.We see in Figure 1 an insulator 1 belonging to a suspension chain. It comprises a glass dielectric 2, the skirt of which can be seen, and the head of which is sealed in a metal cover 3, provided with a zinc coating by a galvanizing treatment.

Par ailleurs, une tige métallique 5 est fixée à l'intérieur de la tête du diélectrique 2.Furthermore, a metal rod 5 is fixed inside the head of the dielectric 2.

Selon l'invention, plus visible dans la figure 2, on interpose, entre la base 6 du capot 3 et la face extérieure 7 de la jupe du diélectrique 2, une pièce 30 en zinc ou en aluminium de révolution autour de l'axe de la tête de l'isolateur et ayant la forme d'un tore plein avec une avancée coincée entre ladite face 7 et ladite base 6. Cette avancée ménage une ouverture centrale 11 permettant d'enfiler la pièce 30 sur la tête du diélectrique 2 avant la mise en place du capot 3. La paroi extérieure 31 de la pièce 30 présente une courbure orientée vers le capot 3.According to the invention, more visible in FIG. 2, a piece 30 of zinc or aluminum of revolution is interposed between the base 6 of the cover 3 and the outer face 7 of the skirt of the dielectric 2 around the axis of the head of the insulator and having the shape of a solid torus with a projection wedged between said face 7 and said base 6. This projection provides a central opening 11 making it possible to thread the part 30 on the head of the dielectric 2 before the fitting the cover 3. The outer wall 31 of the part 30 has a curvature oriented towards the cover 3.

On explique ci-dessous le développement des arcs électriques dans la structure de l'invention. Au lieu de prendre naissance entre la zone 19 de la base 6 du capot 3 et la partie de la face 7 du diélectrique 2 qui lui fait face, ils apparaissent dans la zone 20 située entre la paroi 31 de la pièce 30 et la face 7 du diélectrique 2 ; ils se développent pour atteindre la zone 21 et s'éteignent. Ils ne peuvent donc en aucune manière endommager la base 6 du capot.
On a vérifié par ailleurs que la présence de la pièce 30 ne perturbait en aucune manière la répartition du champ électrique autour de l'isolateur.The development of electric arcs in the structure of the invention is explained below. Instead of originating between the zone 19 of the base 6 of the cover 3 and the part of the face 7 of the dielectric 2 which faces it, they appear in the zone 20 situated between the wall 31 of the part 30 and the face 7 dielectric 2; they develop to reach zone 21 and go out. They cannot therefore in any way damage the base 6 of the cover.
It has also been verified that the presence of the part 30 does not in any way disturb the distribution of the electric field around the insulator.

Lorsque l'isolateur de la figure 1 est destiné aux lignes à courant continu, la structure selon l'invention apporte des avantages supplémentaires. Ainsi, lorsque le capot 3 a une polarité positive par rapport au diélectrique 2, on observe en l'absence de pièce 30 un courant de fuite créant une corrosion électrolytique importante au niveau de la base 6 du capot 3. Lorsque la pièce 30 est en place, c'est elle qui subit la corrosion et qui protège ainsi le capot 3.When the insulator of FIG. 1 is intended for direct current lines, the structure according to the invention brings additional advantages. Thus, when the cover 3 has a positive polarity with respect to the dielectric 2, there is observed in the absence of part 30 a leakage current creating significant electrolytic corrosion at the base 6 of the cover 3. When the part 30 is in place, it is it which undergoes corrosion and thus protects the cover 3.

Selon une variante de réalisation, la pièce 30 est moulée directement sur l'isolateur muni de son capot scellé.According to an alternative embodiment, the part 30 is molded directly on the insulator with its sealed cover.

Le diélectrique peut être en verre ou tout matériau isolant synthétique, et le capot peut être la ferrure d'extrémité d'un isolateur organique.The dielectric can be glass or any synthetic insulating material, and the cover can be the end fitting of an organic insulator.

Claims (2)

  1. A device for protecting the cap of a suspension-type electrical insulator against corrosion, said cap being fixed to the head of a dielectric made of glass, or porcelain, or a synthetic insulating material, characterized in that said protective device consists of a part (30) having the shape of a complete torus whose axis coincides with the axis of the insulator and which comprises:
    - an edge projecting towards the torus axis and clamped between the wall (7) of said dielectric (2) and the base (6) of said cap (3),
    - an inner wall applied against the side surface of said cap,
    - an outside wall (31) curving towards said cap such as to set up between said outside wall and the wall of said dielectric a region (20, 21) allowing for self-extinction of electric arcs,
    and wherein the material of said cap is selected among cast iron and steel, and the material of said part (30) is selected among zinc, aluminum and their alloys.
  2. An electric insulator according to claim 1, characterized in that said part (30) is moulded directly to the base of said cap.
EP86400607A 1985-11-15 1986-03-21 Corrosion protection for the cap of an electrical suspension insulator Expired - Lifetime EP0226474B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86400607T ATE92208T1 (en) 1985-11-15 1986-03-21 ANTI-CORROSION DEVICE ON THE CAP OF AN ELECTRIC HANGING INSULATOR.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8516919A FR2590398B1 (en) 1985-11-15 1985-11-15 DEVICE FOR PROTECTING AN ELECTRICAL SUSPENSION COVER FROM CORROSION
FR8516919 1985-11-15

Publications (2)

Publication Number Publication Date
EP0226474A1 EP0226474A1 (en) 1987-06-24
EP0226474B1 true EP0226474B1 (en) 1993-07-28

Family

ID=9324858

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86400607A Expired - Lifetime EP0226474B1 (en) 1985-11-15 1986-03-21 Corrosion protection for the cap of an electrical suspension insulator

Country Status (14)

Country Link
US (1) US4670624A (en)
EP (1) EP0226474B1 (en)
JP (1) JPH0685285B2 (en)
AT (1) ATE92208T1 (en)
AU (1) AU591392B2 (en)
BR (1) BR8601626A (en)
CA (1) CA1253225A (en)
DE (1) DE3688777T2 (en)
ES (1) ES296682Y (en)
FR (1) FR2590398B1 (en)
MX (1) MX161729A (en)
NO (1) NO168218C (en)
NZ (1) NZ215657A (en)
ZA (1) ZA862421B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62274510A (en) * 1986-05-22 1987-11-28 日本碍子株式会社 Suspension insulator
GB2225176A (en) * 1988-11-18 1990-05-23 Sp Kt Bjuro Izolyatoram I Arma High-voltage suspension insulator
FR2680041B1 (en) * 1991-07-31 1996-07-12 Saint Gobain Emballage GLASS DIELECTRIC PART FOR ELECTRICAL INSULATOR.
FR3057697B1 (en) * 2016-10-18 2020-02-14 Sediver Sa ISOLATOR FOR OVERHEAD POWER LINES WITH A PROTECTED LEAKAGE CURRENT

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB135667A (en) * 1900-01-01
US1659183A (en) * 1921-10-20 1928-02-14 Ohio Brass Co Insulator
US1730232A (en) * 1927-04-28 1929-10-01 Westinghouse Electric & Mfg Co Insulator structure
US2023808A (en) 1933-02-16 1935-12-10 Locke Insulator Corp Shielded cemented type insulator
DE966717C (en) * 1940-11-15 1957-09-05 Porzellanfabrik Kahla Arc protection device on the caps of insulators, bushings or the like.
US3832482A (en) * 1972-07-17 1974-08-27 Westinghouse Electric Corp Ehv rain-shield and voltage grading ring for high-voltage equipment
GB1451071A (en) * 1973-02-17 1976-09-29 Trans Dev Ltd High voltage electric insulator termination constructions
JPS5269598U (en) * 1975-11-19 1977-05-24
US4016358A (en) * 1976-03-11 1977-04-05 Richards Clyde N Electrical insulator with contamination and flash-over eliminator
US4185161A (en) * 1977-08-22 1980-01-22 The United States Of America As Represented By The Secretary Of The Navy Modular guyline insulator

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Le Petit Robert 1, p.1980 *

Also Published As

Publication number Publication date
BR8601626A (en) 1987-11-03
US4670624A (en) 1987-06-02
AU5605886A (en) 1987-05-21
FR2590398A1 (en) 1987-05-22
DE3688777T2 (en) 1993-11-11
DE3688777D1 (en) 1993-09-02
CA1253225A (en) 1989-04-25
ES296682U (en) 1987-12-01
NZ215657A (en) 1989-02-24
JPS62119813A (en) 1987-06-01
ZA862421B (en) 1986-09-29
MX161729A (en) 1990-12-20
NO168218B (en) 1991-10-14
NO861242L (en) 1987-05-18
EP0226474A1 (en) 1987-06-24
NO168218C (en) 1992-01-22
FR2590398B1 (en) 1988-09-09
ATE92208T1 (en) 1993-08-15
JPH0685285B2 (en) 1994-10-26
ES296682Y (en) 1988-06-01
AU591392B2 (en) 1989-11-30

Similar Documents

Publication Publication Date Title
EP2223319B1 (en) Insulation of a current interrupter of the vacuum bulb type by overmoulding
EP3312622B1 (en) Insulator for overhead power lines with a protected leakage current detector
EP2333801A1 (en) Device for the electrical connection of a busbar with an isolated electric feedthrough to a circuit breaker
EP0720181B1 (en) Electrical insulator, manufacturing method of such an insulator and device for carrying out the method
EP0226474B1 (en) Corrosion protection for the cap of an electrical suspension insulator
EP3312850B1 (en) A composite insulator for an overhead power line with a protected leakage current detector
EP1471542B1 (en) Suspension insulator with a sealing plug
EP0516518B1 (en) Device for protection against the effects of flash-over for electrical cable end
EP0037765B1 (en) Circuit interrupter with an arc rotated by a permanent magnet
FR2814275A1 (en) GAS INSULATED CIRCUIT BREAKER WITH AN INTEGRATED ELECTRONIC CURRENT TRANSFORMER
EP1337018A1 (en) Gas-insulated current feedthrough
FR2706676A1 (en) Vacuum switch tube having an annular insulator.
FR2679695A1 (en) VACUUM BULB WITH ELECTRICAL INSULATION.
FR2715248A1 (en) Protective cover for terminals of fluorescent tube
EP2383853B1 (en) Assembly cinsisting of a protective housing and a lightning conductor with priming device
JPH04249815A (en) Lightening insulator
EP0996210B1 (en) Self-supporting cable head
FR2631746A1 (en) Electrical connection washer for lugs made of aluminium or other metal
EP0455538A1 (en) Wall lead-through for an electrical cable
JPH10199350A (en) Polymeric insulator with wet coroma restraining umbrella
JPH07249332A (en) Arrester
FR2758420A1 (en) Varistor for low voltage line protection
JPH01183014A (en) Voltage resistant insulation cylinder for lightning protective insulator
BE509144A (en)
GB2037492A (en) Burning Electrode for an Arcing Ring, and an Arcing Ring for High- tension Overhead Transmission Line Insulators

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 IT LI LU NL SE

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

Owner name: CERAVER SOCIETE ANONYME DITE:

17P Request for examination filed

Effective date: 19871215

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

Owner name: SEDIVER, SOCIETE EUROPEENNE D'ISOLATEURS EN VERRE

17Q First examination report despatched

Effective date: 19900427

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 LU NL SE

REF Corresponds to:

Ref document number: 92208

Country of ref document: AT

Date of ref document: 19930815

Kind code of ref document: T

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19930804

REF Corresponds to:

Ref document number: 3688777

Country of ref document: DE

Date of ref document: 19930902

ITF It: translation for a ep patent filed

Owner name: JACOBACCI CASETTA & PERANI S.P.A.

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

Ref country code: AT

Effective date: 19940321

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: 19940322

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

Ref country code: LU

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

Effective date: 19940331

Ref country code: LI

Effective date: 19940331

Ref country code: CH

Effective date: 19940331

Ref country code: BE

Effective date: 19940331

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
BERE Be: lapsed

Owner name: SOC. EUROPEENNE D'ISOLATEURS EN VERRE ET COMPOSITE

Effective date: 19940331

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

Ref country code: NL

Effective date: 19941001

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
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: DE

Effective date: 19941201

EUG Se: european patent has lapsed

Ref document number: 86400607.7

Effective date: 19941010

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

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

Ref country code: FR

Payment date: 20050308

Year of fee payment: 20

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

Ref country code: GB

Payment date: 20050314

Year of fee payment: 20

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

Ref country code: IT

Payment date: 20050316

Year of fee payment: 20

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

Ref country code: GB

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20060320

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20