EP0554541B1 - Brûleur à cylindres pour brûleurs à air soufflé à prémélange pour appareils de chauffage à gaz - Google Patents

Brûleur à cylindres pour brûleurs à air soufflé à prémélange pour appareils de chauffage à gaz Download PDF

Info

Publication number
EP0554541B1
EP0554541B1 EP92120802A EP92120802A EP0554541B1 EP 0554541 B1 EP0554541 B1 EP 0554541B1 EP 92120802 A EP92120802 A EP 92120802A EP 92120802 A EP92120802 A EP 92120802A EP 0554541 B1 EP0554541 B1 EP 0554541B1
Authority
EP
European Patent Office
Prior art keywords
cylinder
cover
connecting flange
plate
combustion
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
EP92120802A
Other languages
German (de)
English (en)
Other versions
EP0554541A2 (fr
EP0554541A3 (en
Inventor
Adolf Heeb
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.)
Hoval Interliz AG
Original Assignee
Hoval Interliz AG
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 Hoval Interliz AG filed Critical Hoval Interliz AG
Publication of EP0554541A2 publication Critical patent/EP0554541A2/fr
Publication of EP0554541A3 publication Critical patent/EP0554541A3/de
Application granted granted Critical
Publication of EP0554541B1 publication Critical patent/EP0554541B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/30—Inverted burners, e.g. for illumination
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details, e.g. noise reduction means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2211/00—Thermal dilatation prevention or compensation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
    • F23D2900/00003—Fuel or fuel-air mixtures flow distribution devices upstream of the outlet

Definitions

  • the invention relates to a combustion cylinder for premixed forced draft burners of gas heating devices according to the preamble of the main claim.
  • combustion cylinders are e.g. known from EP-A-0 309 838.
  • fan burners are used in which a mixture of fuel gas and air, which is usually pre-stoichiometrically pre-mixed before the flame is formed, is fed to a preferably arranged hanging cylinder in the gas heater, which has the outer wall of a flame holding cylinder made of perforated heat-resistant sheet metal material, on which the flame formation takes place .
  • a modern development of the aforementioned combustion cylinder has two further cylinders, likewise made of perforated heat-resistant sheet metal material, namely in the flame holding cylinder with a radial distance a distribution cylinder and in this with a radial distance a throttle cylinder.
  • connection flange which contains the opening for the entry of the mixture into the combustion cylinder
  • cover which closes the opposite end of the combustion cylinder
  • the connection flange and the cover being formed with three concentric annular grooves into which the three cylinders with their edges are inserted.
  • the outer flame holding cylinder is fastened at both edges in the annular groove of the connection flange and the cover by means of several radial screw bolts in order to hold the connection flange and the cover and thus the entire combustion cylinder together.
  • the distribution cylinder and the throttle cylinder are usually only attached to their lower edge in the ring grooves of the cover by means of the radial screw bolts and axially movable at the upper edge in the ring grooves of the connection flange, so that the connection flange and cover can change their distance from one another when the outer flame holding cylinder, which is most subjected to temperature changes, changes its axial length. It is necessary to also seal the edges of the flame holding cylinder fastened in the ring grooves of the connecting flange and the cover by inlaid, high-temperature-resistant special seals, since gas leaks at the bordered edges of the flame holding cylinder would considerably disrupt the flame formation and the combustion.
  • the construction and assembly of the known fuel cylinder are also relatively complex due to the formation of the cast flange and the cast cover with three concentric receiving ring grooves for all three sheet metal cylinders and by attaching the sheet metal cylinder in the receiving grooves by means of several radial bolts.
  • the invention therefore has for its object to design the fuel cylinder of the type mentioned in such a way that both the flame holding cylinder and the distribution cylinder on both edges with a secure gas-tight connection, which does not necessarily have to have an axial mobility of the cylinder edges, to the connecting flange and the lid is connected and the strongly heated flame holding cylinder can still perform sufficient axial elongation to avoid mechanical stress cracks.
  • the manufacture and assembly of the combustion cylinder should be made easier.
  • combustion cylinder design according to the invention is described in more detail below with reference to the embodiment shown in the drawing in axial longitudinal section.
  • the combustion cylinder has at its upper end a conical connecting flange 1, which has the opening 14 for the entry of the combustible mixture into the combustion cylinder contains, and at its lower end a closed cover 2. Between the connecting flange 1 and the cover 2, an outer flame holding cylinder 3, a middle distribution cylinder 4 and an inner throttle cylinder 5 are arranged. These three cylinders are made of perforated, heat-resistant sheet metal and are arranged concentrically with a radial distance from each other.
  • the connecting flange 1 and the cover 2 are not cast parts as in the conventional combustion cylinders described above, but also consist of heat-resistant sheet metal material and are formed by sheet metal drawing, which is much easier and cheaper than the customary production of these two parts of the combustion cylinder from cast iron. This also makes the weight of the combustion cylinder much lighter.
  • the cover 2 consists of two parts, an inner cover plate 7 and an outer cover plate 8. The complete combustion cylinder is held together by the central distribution cylinder 4, which is firmly and essentially sealed to the connecting flange 1 and the inner cover plate 7 on both edges. At the lower edge, the distribution cylinder 4 is fastened to an upward-facing edge flange 15 of the inner cover plate 7 by spot welding.
  • the lower edge of the inner throttle cylinder 5 adjoins the lid inner plate 7 when not fastened.
  • the distribution cylinder 4 and the throttle cylinder 5 are fastened together by spot welding to bolts 12 which can be plugged through bolt holes of the connecting flange 1 in the axial direction of the combustion cylinder and screwed to the connecting flange.
  • bolts 12 can be plugged through bolt holes of the connecting flange 1 in the axial direction of the combustion cylinder and screwed to the connecting flange.
  • the heating and axial expansion of the distribution cylinder 4 during operation of the burner is significantly less than that of the incandescent flame holding cylinder 3, so that the change in distance between the connecting flange 1 and cover 2 is kept correspondingly small and a gap formation between the lower edge of the less than the distribution cylinder is heated and axially expanding throttle cylinder and the cover inner plate 7 arises, the throttle function of the throttle cylinder 5 is not significantly influenced.
  • the extremely strongly heating flame holding cylinder 3 is received on both edges by annular groove-like holders 6 of the connecting flange 1 and the cover 2, in which the flame holding cylinder 3 is axially movable and also radially movable due to the diameter changes which also occur with the temperature changes.
  • the annular groove-like brackets 6 are formed by U-shaped edge flanges 13, which can be produced simply by sheet metal drawing, on the connecting flange 1 consisting of sheet metal and on the cover outer plate 8 made of sheet metal.
  • the inner cover plate 7 fastened to the distribution cylinder 4 and the outer cover plate 8 holding the flame holding cylinder 3 are shown by a Embodiment from a screw 9 arranged at the center of the lid held together by a compression spring 10, by means of which the outer plate 8 can be resiliently pressed off the inner plate 7 is.
  • the axially resilient connection of the two cover plates 7 and 8 expediently additionally includes an anti-rotation device which consists of pins 11 which are fastened to the cover inner plate 7 and engage in guide holes in the cover outer plate 8 with axial displacement.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)

Claims (4)

  1. Cylindre de combustion pour brûleurs à ventilateur à prémélange d'appareils de chauffage au gaz, comportant une bride de raccordement (1) placée comme partie de paroi frontale à une extrémité du cylindre et contenant l'orifice d'entrée du mélange gaz combustion/air dans le cylindre de combustion, un couvercle fermé (2) placé comme partie de paroi frontale à l'autre extrémité du cylindre et un cylindre extérieur arrête-flamme (3), un cylindre intermédiaire répartiteur (4) et un cylindre intérieur étrangleur (5) placés entre les deux parties de paroi frontale, ces trois cylindres, en tôle réfractaire perforée, étant placés coaxialement et espacés radialement, caractérisé par le fait que le couvercle (2) est constitué de deux parties, une plaque intérieure (7) et une plaque extérieure (8), que la bride de raccordement (1) et le couvercle (2) sont tenus ensemble par le cylindre intermédiaire répartiteur (4), qui est fixé à ses deux bords de manière pratiquement étanche à la bride de raccordement et à la plaque intérieure (7) du couvercle, le cylindre intérieur étrangleur (5) étant fixé à un bord et non fixé à l'autre bord dans le cylindre de combustion, que le cylindre extérieur arrête-flamme (3) est monté à ses deux bords mobile coaxialement et radialement et de manière pratiquement étanche dans des supports du genre gorge annulaire (6) de la bride de raccordement (1) et de la plaque extérieure (8) du couvercle, et que les deux plaques (7, 8) du couvercle sont tenues ensemble par un dispositif de liaison au moyen duquel la plaque extérieure (8) peut se desserrer élastiquement de la plaque intérieure (7).
  2. Cylindre de combustion selon la revendication 1, caractérisé par le fait que le dispositif de liaison élastique axialement des deux plaques (7, 8) du couvercle comporte en plus un dispositif anti-rotation (11).
  3. Cylindre de combustion selon la revendication 1, caractérisé par le fait que le cylindre répartiteur (4) et le cylindre étrangleur (5) sont, de préférence à leur bord dirigé vers la bride de raccordement (1), fixés ensemble à des boulons (12) qui peuvent être vissés à la bride de raccordement (1) dans la direction axiale du cylindre de combustion et serrent alors de manière étanche les bords des deux cylindres (4, 5) contre la bride de raccordement (1).
  4. Cylindre de combustion selon la revendication 1, caractérisé par le fait que la bride de raccordement (1) et la plaque extérieure (8) du couvercle sont en tôle et leurs supports du genre gorge annulaire pour le cylindre extérieur arrête-flamme (3) sont formés par des bordés en U (13) des deux éléments en tôle (1, 8).
EP92120802A 1992-02-04 1992-12-05 Brûleur à cylindres pour brûleurs à air soufflé à prémélange pour appareils de chauffage à gaz Expired - Lifetime EP0554541B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9201313U DE9201313U1 (de) 1992-02-04 1992-02-04 Brennzylinder für vormischende Gebläsebrenner von Gasheizgeräten
DE9201313U 1992-02-04

Publications (3)

Publication Number Publication Date
EP0554541A2 EP0554541A2 (fr) 1993-08-11
EP0554541A3 EP0554541A3 (en) 1993-09-29
EP0554541B1 true EP0554541B1 (fr) 1995-08-23

Family

ID=6875706

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92120802A Expired - Lifetime EP0554541B1 (fr) 1992-02-04 1992-12-05 Brûleur à cylindres pour brûleurs à air soufflé à prémélange pour appareils de chauffage à gaz

Country Status (11)

Country Link
EP (1) EP0554541B1 (fr)
AT (1) ATE126873T1 (fr)
CZ (1) CZ281489B6 (fr)
DE (2) DE9201313U1 (fr)
DK (1) DK0554541T3 (fr)
ES (1) ES2078636T3 (fr)
GR (1) GR3018129T3 (fr)
HR (1) HRP930100B1 (fr)
RU (1) RU2104444C1 (fr)
SI (1) SI9300062A (fr)
SK (1) SK278762B6 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1292577B1 (it) * 1997-05-23 1999-02-08 Worgas Bruciatori Srl Bruciatore di gas cilindrico.
EP0892213A1 (fr) * 1997-07-16 1999-01-20 Gianmario Invernizzi Brûleur à lit filtrant et procédé de combustion de gaz réalisé par ce dispositif
FR2794222B1 (fr) * 1999-05-26 2001-06-29 Alain Boulogne Dispositif de compensation de dilatations pour bruleurs multifluides a residus

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3831624A1 (de) * 1987-09-26 1989-04-06 Ruhrgas Ag Gasbrenner
DE3868815D1 (de) * 1987-09-26 1992-04-09 Ruhrgas Ag Gasbrenner.

Also Published As

Publication number Publication date
DE59203387D1 (de) 1995-09-28
SK386592A3 (en) 1993-10-06
CZ281489B6 (cs) 1996-10-16
EP0554541A2 (fr) 1993-08-11
RU2104444C1 (ru) 1998-02-10
ATE126873T1 (de) 1995-09-15
CZ386592A3 (en) 1995-06-14
DE9201313U1 (de) 1992-03-26
ES2078636T3 (es) 1995-12-16
SK278762B6 (sk) 1998-02-04
GR3018129T3 (en) 1996-02-29
HRP930100B1 (en) 1998-02-28
SI9300062A (en) 1993-09-30
EP0554541A3 (en) 1993-09-29
HRP930100A2 (en) 1994-12-31
DK0554541T3 (da) 1995-12-27

Similar Documents

Publication Publication Date Title
EP2211095B1 (fr) Brûleur à gaz
EP0823035A1 (fr) Tete de la chambre annulaire de combustion de turbines a gaz
EP2363643A1 (fr) Elément de bouclier thermique
WO2010057709A1 (fr) Agencement de brûleur
DE69617822T2 (de) Infrarotstrahler mit einem katalytischen Brenner
DE2541991C3 (de) Brenner
EP0554541B1 (fr) Brûleur à cylindres pour brûleurs à air soufflé à prémélange pour appareils de chauffage à gaz
EP2870409B1 (fr) Brûleur à système de combustion superficielle
EP0057747B1 (fr) Brûleur pour la combustion de combustibles pulvérulents
EP2439454A1 (fr) Brûleur à gaz pour un appareil de cuisson
DE19634200A1 (de) Wärmetauscher für einen Heizkessel, insbesondere eine wandhängende Gastherme
DE10058794A1 (de) Heizgerät mit einer Dichtung zum Trennen von Brennluft, Abgas und Umgebungsluft
DE8909202U1 (de) Mischeinrichtung für Gebläsebrenner
EP0656507A2 (fr) Brûleur à prémélange opérant au gaz
EP0209703B1 (fr) Cartouche incandescente pour fours, en particulier pour chaudières ainsi que four avec une telle cartouche
DE3831624A1 (de) Gasbrenner
DE2120126A1 (de) Hochleistungsbrenner
DE19547962A1 (de) Strahlungsbrenner
DE102008019532B3 (de) Ölvormischbrenner
DE10144400A1 (de) Vorrichtung zum Einbringen eines Brennstoff/Luft-Gemisches in einen Brenner und Verfahren zur Montage einer solchen Vorrichtung
DE69910167T2 (de) Rohrbrenner
DE102012012539A1 (de) Ölvormischbrenner
DE69200857T2 (de) Mischer von Luft und Verbrennungsgas für Gasbrenner von Industrieöfen.
DE102021101418B4 (de) Brenner für gasförmige Gemische mit niedrigem Heizwert
DE102011051044B3 (de) Brennkammeranordnung

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 DK ES FR GB GR IE IT LI LU NL PT SE

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LI LU NL PT SE

17P Request for examination filed

Effective date: 19940119

17Q First examination report despatched

Effective date: 19950208

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 DK ES FR GB GR IE IT LI LU NL PT SE

REF Corresponds to:

Ref document number: 126873

Country of ref document: AT

Date of ref document: 19950915

Kind code of ref document: T

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: 65014

REF Corresponds to:

Ref document number: 59203387

Country of ref document: DE

Date of ref document: 19950928

ITF It: translation for a ep patent filed
ET Fr: translation filed
REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2078636

Country of ref document: ES

Kind code of ref document: T3

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

Effective date: 19951120

REG Reference to a national code

Ref country code: DK

Ref legal event code: T3

REG Reference to a national code

Ref country code: GR

Ref legal event code: FG4A

Free format text: 3018129

SC4A Pt: translation is available

Free format text: 951110 AVAILABILITY OF NATIONAL TRANSLATION

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: GB

Payment date: 19981112

Year of fee payment: 7

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

Ref country code: FR

Payment date: 19981113

Year of fee payment: 7

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

Ref country code: IE

Payment date: 19981117

Year of fee payment: 7

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

Ref country code: DK

Payment date: 19981118

Year of fee payment: 7

Ref country code: SE

Payment date: 19981118

Year of fee payment: 7

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

Ref country code: AT

Payment date: 19981123

Year of fee payment: 7

Ref country code: NL

Payment date: 19981123

Year of fee payment: 7

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

Ref country code: CH

Payment date: 19981125

Year of fee payment: 7

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

Ref country code: LU

Payment date: 19981126

Year of fee payment: 7

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

Ref country code: GR

Payment date: 19981130

Year of fee payment: 7

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

Ref country code: BE

Payment date: 19981209

Year of fee payment: 7

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

Ref country code: ES

Payment date: 19981218

Year of fee payment: 7

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

Ref country code: DE

Payment date: 19981219

Year of fee payment: 7

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

Ref country code: PT

Payment date: 19981222

Year of fee payment: 7

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

Ref country code: IE

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

Effective date: 19991205

Ref country code: DK

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

Effective date: 19991205

Ref country code: AT

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

Effective date: 19991205

Ref country code: GB

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

Effective date: 19991205

Ref country code: LU

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

Effective date: 19991205

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: 19991206

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: 19991231

Ref country code: CH

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

Effective date: 19991231

Ref country code: GR

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

Effective date: 19991231

Ref country code: BE

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

Effective date: 19991231

BERE Be: lapsed

Owner name: HOVAL INTERLIZ A.G.

Effective date: 19991231

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 NON-PAYMENT OF DUE FEES

Effective date: 20000630

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

Ref country code: NL

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

Effective date: 20000701

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19991205

EUG Se: european patent has lapsed

Ref document number: 92120802.1

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: 20000831

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

Effective date: 20000701

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

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: 20001003

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

REG Reference to a national code

Ref country code: PT

Ref legal event code: MM4A

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

Effective date: 20000630

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

Ref country code: ES

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

Effective date: 20001206

REG Reference to a national code

Ref country code: DK

Ref legal event code: EBP

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20010113

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 NON-PAYMENT OF DUE FEES;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: 20051205