EP0224537B1 - Kühltunnel - Google Patents

Kühltunnel Download PDF

Info

Publication number
EP0224537B1
EP0224537B1 EP86903422A EP86903422A EP0224537B1 EP 0224537 B1 EP0224537 B1 EP 0224537B1 EP 86903422 A EP86903422 A EP 86903422A EP 86903422 A EP86903422 A EP 86903422A EP 0224537 B1 EP0224537 B1 EP 0224537B1
Authority
EP
European Patent Office
Prior art keywords
tube
tunnel according
tunnel
cooling
orifices
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
EP86903422A
Other languages
English (en)
French (fr)
Other versions
EP0224537A1 (de
Inventor
Bernard Boyer
Louis Giacinti
Jean-Yves Thonnelier
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.)
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Original Assignee
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
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 LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude filed Critical LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Priority to AT86903422T priority Critical patent/ATE51290T1/de
Publication of EP0224537A1 publication Critical patent/EP0224537A1/de
Application granted granted Critical
Publication of EP0224537B1 publication Critical patent/EP0224537B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D3/00—Devices using other cold materials; Devices using cold-storage bodies
    • F25D3/10—Devices using other cold materials; Devices using cold-storage bodies using liquefied gases, e.g. liquid air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D3/00—Devices using other cold materials; Devices using cold-storage bodies
    • F25D3/10—Devices using other cold materials; Devices using cold-storage bodies using liquefied gases, e.g. liquid air
    • F25D3/102—Stationary cabinets

Definitions

  • the present invention relates to a cooling tunnel of the type described in the preamble of claim 1. It applies in particular to the cooling of a succession of cold parts in other members.
  • FR-A-2 349 110 provides a cooling tunnel of the aforementioned type.
  • the refrigerant may contain non-vaporized droplets when it enters the tube. This is doubly disadvantageous: on the one hand from the point of view of thermal efficiency, on the other hand due to the losses of liquid which are liable to occur if the tube is directly opened downwards.
  • the object of the invention is to eliminate these drawbacks by providing a cooling device making it possible to obtain a wide range of cooling temperatures at the cost of reduced consumption of cryogenic liquid.
  • the subject of the invention is a cooling tunnel of the aforementioned type, characterized by the content of the characterizing part of claim 1.
  • the tunnel shown in FIG. 1 is intended for cooling a succession of rings A, for example valve guides, intended to be cold fitted into cylinder heads of automobile engines.
  • This tunnel of general shape of revolution around a vertical axis X - X, comprises a central tube 1 surrounded by a second tube 2, a heat exchanger 3 disposed around the tube 2, a device 4 for closing off the lower end of the tube 1, and thermal insulation 5 contained in an outer envelope 6.
  • the tube 1 which is adapted to surround the rings A with significant play, is open at its two ends; it defines with the tube 2 an annular intrermediate chamber 7 closed at its two ends by suitable upper 8 and lower 9 plugs, the latter being of a thermally insulating material.
  • the tube 1 has a ring of orifices 10 situated a little above the plug 9.
  • the heat exchanger 3 is arranged in the middle region of the tube 2 and extends over part of the length of this tube. It consists of a wire 11 wound helically around the tube 2 and clamped between this tube and a sealed casing 12. The wire 11 thus delimits in the casing 12 a helical duct 13 whose lower end is connected to a pipe 14 d 'supply of liquid nitrogen controlled by a solenoid valve 15, while the upper end of the conduit 13 cammunique with the chamber 7 by a ring of orifices 16.
  • the insulation 5 may consist of an insulating material, for example a plastic foam, which fills the space delimited by the casing 12, the upper and lower parts of the tube 2 and the casing 6.
  • a temperature probe 17 passes through the casing 6, the insulation 5 and the tube 2 and enters the chamber 7, at the level of the orifices 10. This probe controls the opening or closing of the solenoid valve 15 according to the temperature sensed, via a control box 18.
  • the closure device 4 made of plastic, comprises a fixed horizontal plate 19 provided with an opening 20 offset relative to the axis X - X, and a drawer plate 21 whose thickness is equal to that of 'A ring A and which can slide between the plate 19 and the underside of the plug 9 under the action of a jack (not shown).
  • This drawer plate has an opening 22 which, like the opening 20, has a diameter substantially equal to the inside diameter of the tube 1; it can slide between two positions in one of which ( Figure 1) the opening 22 is opposite the tube 1 and a solid region of the plate 19, while in the other position ( Figure 2), this opening is located directly above opening 20.
  • the rings A are stacked flat in the tube 1, over almost the entire height of the latter, and the solenoid valve 15 is opened.
  • Liquid nitrogen penetrates via the pipe 14 into the pipe 13, vaporizes there and penetrates in gaseous form into the intermediate chamber 7 through the orifices 16.
  • the nitrogen gas heats up by yielding cold to the tube 1 and to the rings A and circulates from top to bottom.
  • the probe 17 After a transient cooling phase, the probe 17 detects a set cold temperature and begins to regulate the supply of liquid nitrogen by means of an appropriate valve 15.
  • the rings A located at the bottom of the tube 1 are cooled to the desired cold temperature, for example between -60 ° C and -170 ° C. They are extracted one by one from the tunnel by alternately bringing the slide 21 in the position of FIG. 1, or a ring A falls in the opening 19, and in that of FIG. 2, where this ring falls through the opening 20 in a receiving device not shown.
  • the heat of vaporization of liquid nitrogen and the sensible heat of nitrogen gas are best used for cooling the rings A.
  • the upward, downward path, and then again with nitrogen makes it possible to obtain effective cooling, against the current, of the stack of rings A while ensuring that no loss of liquid nitrogen takes place. will produce through the closure device 4, since only nitrogen gas enters the tube 1 through the orifices 10.
  • the solenoid valve 15 when the solenoid valve 15 is open, the rings A are kept under a nitrogen atmosphere, which avoids the presence of moisture or ice on these parts.
  • the device is flexible, easily automatable and allows the desired fitting temperature to be obtained precisely with reduced consumption of liquid nitrogen.
  • the chamber 7 can be filled with a packing of the bulk type (balls, "Dixxon” rings) or other (mesh, metal sponge), or else provide in this chamber fins forming baffles.
  • this lining or these fins are made of a thermally conductive material, they also have the advantage of improving the heat exchange between the nitrogen and the objects to be cooled.
  • the tunnel of FIGS. 1 and 2 is more particularly adapted to the case where the thermal insulation 5 is not under vacuum. In fact, it is then possible to close the corresponding inter-wall space without involving a metal part forming a thermal bridge between the lower end of the device, which is at ambient temperature, and the location of the orifices 10, which is at the low set temperature.
  • the central tube 1 has a rectangular section to receive the rings A with clearance on the edge, then that the tube 2 remains of circular section.
  • the tubes 1 and 2 are extended downwards for a substantial distance, for example over 10 to 20 cm, below the orifices 10.
  • the lower end of the tube 2 is connected by a welded ring 24 to that of the envelope exterior 6.
  • the annular space delimited between the tubes 1 and 2 is filled with a plug 9 made of insulating material, for example a foam, below the orifices 10.
  • the drawer 21 is full and slides horizontally, under the action of a jack 25, against the underside of the plug 9. It only serves to seal the tube 1.
  • a jack 25 against the underside of the plug 9. It only serves to seal the tube 1.
  • the tube 1 has a passage orifice for each of the two fingers.
  • FIGS. 3 and 4 also show the lining 31 which was discussed above and which fills the space between the tubes 1 and 2 and above the plug 9.
  • the drawer 21 In the position shown, the drawer 21 is closed; the lower finger 27 enters the tube 1, while the upper finger 26 is retracted and does not protrude into this tube.
  • the column of rings A therefore rests on the finger 27.
  • the vaporized nitrogen enters the tube 1 through the orifices 10, just below the lower ring A, and cools all the rings against the current.
  • the finger 26 is extended, which enters the tube 1 and retains the second ring. In time or just after, the drawer 21 is opened and the finger 27 is retracted.
  • the lower ring cooled to the set temperature thanks to its standby position adjacent to the orifices 10, then falls out of the tunnel, into an appropriate receiving device (not shown). Then the drawer 21 is closed, the finger 27 is extended again and the finger 26 is retracted, so that the column of rings descends by a notch, and a new cycle is repeated. As will be understood, the entire operation can be easily automated.
  • a safety device ensures the closing of the solenoid valve 15 when the drawer 21 is open.
  • the heat losses are reduced thanks to the distance of the orifices 10 from the outlet of the tunnel, and each ring is nevertheless maintained at the cold set temperature until it is removed from the device.
  • the invention applies to the cooling of various types of mechanical parts intended to be cold-pressed (guides and valve seats, pinions, etc.) and can extend to the cooling of bulk materials; in the latter case, the shutter and retaining device 4 or 21 - 26 - 27 can be omitted, the cooled material resting on an embankment contained in an appropriate evacuation receptacle sealingly connected to the lower part of the outer casing 6 or of the tube 1. It would also be possible, in the same case, to replace the closure and retaining device with a sealed metering device such as a rotary cell valve, although the device 4 Figures 1 and 2 can also play this role.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Physical Vapour Deposition (AREA)

Claims (14)

1. Kühltunnel mit einem Rohr (1), das eine obere Öffnung für das Zuführen von Kühlgut (A) und eine untere Öffnung für das Wegführen des gekühlten Guts durch sein Eigengewicht aufweist sowie eine Einrichtung zum Bewegen eines durch Verdampfen einer kryogenen Flüssigkeit entstandenen Fluids durch das Rohr von unten nach oben, dadurch gekennzeichnet, daß die genannte Einrichtung eine an ihren beiden Enden abgeschlossene und das Rohr (1) koaxial umgebende Zwischenkammer (7) sowie einen koaxial zu dem Rohr verlaufenden und außerhalb der genannten Kammer angeordneten Wärmetauscher (3) aufweist, in dem eine Leitung (13) verläuft, deren Eintrittsende an eine Quelle kryogener Flüssigkeit angeschlossen ist und deren oberes Ende in die Zwischenkammer ausmündet, die ihrerseits durch Öffnungen (10) mit dem Rohr (1) nahe dessen unterem Ende verbunden ist.
2. Kühltunnel nach Anspruch 1, dadurch gekennzeichnet, daß die Zwischenkammer eine Auskleidung (31) oder Einbauten aufweist, die vorzugsweise aus wärmeleitendem Material besteht (bestehen).
3. Kühltunnel nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß er einen Temperaturfühler (17) aufweist, der die Temperatur des Kühlfluids im Bereich der genannten Öffnungen (10) ermittelt, sowie ein durch diesen Temperaturfühler gesteuertes Magnetventil (15) zur Versorgung des Wärmetauschers (3) mit kryogener Flüssigkeit.
4. Kühltunnel nach Anspruch 3, dadurch gekennzeichnet, daß das Magnetventil (15) mit einer verengten Umleitung (24) versehen ist.
5. Kühltunnel nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß eine Einrichtung (4) zum Verschließen der unteren Öffnung des Rohrs (1) vorgesehen ist.
6. Kühftunnel nach Anspruch 5, dadurch gekennzeichnet, daß die genannte Einrichtung (4) zum Verschließen eine Einrichtung (21) zum Wegführen von aufeinanderfolgenden Einzelelementen des gekühlten Materials aufweist.
7. Kühltunnel nach Anspruch 6, dadurch gekennzeichnet, daß die genannte Verschließeinrichtung zwischen dem unteren Ende des Tunnels und einer feststehenden Führungsplatte (19) einen beweglichen Schieber (21) aufweist, der eine Öffnung (22) besitzt, die in einer ersten Stellung des Schiebers der unteren Öffnung des Rohrs (1) und einem massiven Teil der genannten Platte (19) gegenübersteht und in einer zweiten Stellung des Schiebers einer in dieser Platte befindlichen Öffnung (20) gegenübersteht.
8. Kühltunnel nach einem der Ansprüche 1 bis 7 zum Kühlen einer Folge von Einzelstücken (A), dadurch gekennzeichnet, daß der Querschnitt des Rohrs (1) erhebliches Spiel gegenüber dem Querschnitt der Teile (A) hat.
9. Kühltunnel nach Anspruch 7 in Verbindung mit Anspruch 8 zum Kühlen von übereinandergestapelten aufgebohrten Teilen (A), dadurch gekennzeichnet, daß die Oberseite des Schiebers (21) eine Eintiefung (23) aufweist, die in der genannten zweiten Schieberstellung dem Rohr (1) gegenüberliegt.
10. Kühltunnel nach Anspruch 9, dadurch gekennzeichnet, daß die Oberseite der Führungsplatte (19) eine lotrecht unter dem Rohr (1) liegende Eintiefung (23) aufweist.
11. Kühltunnel nach Anspruch 6 zum Kühlen einer Aufeinanderfolge von Einzelstücken (A), dadurch gekennzeichnet, daß er eine Einrichtung (27) aufweist, um wahlweise das untere Stück (A) nahe den genannten Öffnungen (10) anzuhalten, sowie eine Einrichtung (26), um wahlweise das unmittelbar darüber befindliche Stück (A) anzuhalten.
12. Kühltunnel nach Anspruch 11, dadurch gekennzeichnet, daß der durch das Rohr (1) definierte Durchgang sich mit dem gleichen Querschnitt unter die genannten Öffnungen (10) eine gewisse Strecke weit fortsetzt.
13. Kühltunnel nach einem der Ansprüche 1 bis 12, dadurch gekennzeichnet, daß die Achse (X - X) des Rohrs (1) vertikal steht.
EP86903422A 1985-06-11 1986-06-04 Kühltunnel Expired - Lifetime EP0224537B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86903422T ATE51290T1 (de) 1985-06-11 1986-06-04 Kuehltunnel.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8508777 1985-06-11
FR8508777A FR2583149B1 (fr) 1985-06-11 1985-06-11 Tunnel de refroidissement

Publications (2)

Publication Number Publication Date
EP0224537A1 EP0224537A1 (de) 1987-06-10
EP0224537B1 true EP0224537B1 (de) 1990-03-21

Family

ID=9320077

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86903422A Expired - Lifetime EP0224537B1 (de) 1985-06-11 1986-06-04 Kühltunnel

Country Status (12)

Country Link
US (1) US4741168A (de)
EP (1) EP0224537B1 (de)
JP (1) JPH0781767B2 (de)
KR (1) KR880700224A (de)
AU (1) AU584219B2 (de)
BR (1) BR8606724A (de)
CA (1) CA1307931C (de)
DE (1) DE3669774D1 (de)
ES (1) ES8900060A1 (de)
FR (1) FR2583149B1 (de)
WO (1) WO1986007440A1 (de)
ZA (1) ZA864348B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105143794A (zh) * 2013-03-22 2015-12-09 大阳日酸株式会社 深冷处理装置

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5520004A (en) * 1994-06-28 1996-05-28 Jones, Iii; Robert H. Apparatus and methods for cryogenic treatment of materials
FR2840063B1 (fr) * 2002-05-24 2005-07-08 Air Liquide Procede et installation de refroidissement ou cristallisation de produits utilisant un caloduc azote liquide a surface raclee
US20070294912A1 (en) * 2006-05-11 2007-12-27 Ernesto Renzi Integrated heater/cooler

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1651858A (en) * 1921-05-05 1927-12-06 William C Davis Vending apparatus
US2237255A (en) * 1937-05-29 1941-04-01 William J Finnegan Method and apparatus for quick freezing and handling of comestibles
US2552832A (en) * 1946-04-17 1951-05-15 Union Carbide & Carbon Corp Cold treating method and machine
US2885864A (en) * 1955-10-14 1959-05-12 United Aircraft Prod Heat transfer system using expendable coolant
US3412573A (en) * 1966-09-21 1968-11-26 Richard S. Pauliukonis Cryogenic quick freezing apparatus
US3494140A (en) * 1967-10-17 1970-02-10 Integral Process Syst Inc Liquid nitrogen flash freezing
FR2051961A5 (en) * 1969-07-01 1971-04-09 Anhydride Carbonique Cooler unit for low temp tube treatment
FR2088148A1 (de) * 1970-05-22 1972-01-07 Air Liquide
US3738121A (en) * 1971-11-12 1973-06-12 P Swindell Temperature modifying apparatus using expendable refrigerant
FR2349110A1 (fr) * 1976-04-21 1977-11-18 Air Liquide Procede et dispositif de refrigeration en continu de produits en vrac
DE2733418A1 (de) * 1977-07-23 1979-02-01 Messer Griesheim Gmbh Kuehltunnel zum abkuehlen eines endlos laufenden bandes
IT1105891B (it) * 1978-04-28 1985-11-04 Martelli Guglielmo Dispositivo a scappamento per la separazione singola ad altissima velocita di tavolette tipo blister strips cassonetti e similari prodotti immagazzinabili
US4249672A (en) * 1979-06-26 1981-02-10 Rossi Alfred F Counter for ticket-like items
FR2505467A1 (fr) * 1981-05-08 1982-11-12 Air Liquide Procede et installation de rigidification transitoire d'un produit en materiau mou

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105143794A (zh) * 2013-03-22 2015-12-09 大阳日酸株式会社 深冷处理装置
CN105143794B (zh) * 2013-03-22 2017-03-29 大阳日酸株式会社 深冷处理装置

Also Published As

Publication number Publication date
JPS63500053A (ja) 1988-01-07
JPH0781767B2 (ja) 1995-09-06
AU584219B2 (en) 1989-05-18
FR2583149B1 (fr) 1988-01-08
KR880700224A (ko) 1988-02-20
ES8900060A1 (es) 1988-11-16
WO1986007440A1 (fr) 1986-12-18
BR8606724A (pt) 1987-08-11
ES555895A0 (es) 1988-11-16
ZA864348B (en) 1987-02-25
DE3669774D1 (de) 1990-04-26
CA1307931C (fr) 1992-09-29
US4741168A (en) 1988-05-03
EP0224537A1 (de) 1987-06-10
AU5953586A (en) 1987-01-07
FR2583149A1 (fr) 1986-12-12

Similar Documents

Publication Publication Date Title
EP0336791B1 (de) Behälter für den Transport von Transplantaten
EP0224537B1 (de) Kühltunnel
EP2230065A1 (de) Formwerkzeug zum Warmformen mit Wärmedämmung, und entsprechendes Verfahren
FR2531516A1 (fr) Reservoir de gaz liquefie a basse temperature comprenant une barriere secondaire et procede de detection des fuites eventuelles de la barriere secondaire
EP0893347A1 (de) Kryogenventil für eine Anlage zum Verpacken eines Produkts
EP2937443A1 (de) Verdampfungszelle
FR2562767A1 (fr) Appareil pour la cuisson d'aliments
EP0471826B1 (de) Behälter zum transport eines feststoffes
FR2469667A1 (fr) Chauffe-eau
EP0183594B1 (de) Vorrichtung für die Distribution einer kryogenen Flüssigkeit
FR2912303A1 (fr) Dispositif d'alimentation en eau d'une cavite chauffante pour un appareil electromenager
FR2609111A1 (fr) Dispositif de chauffage de carburant pour moteurs diesel
FR2965835A1 (fr) Installation comprenant un poste de transformation electrique et un systeme ameliore de separation des eaux pluviales et de l'huile de fuite
WO2020229777A1 (fr) Cuve de transport et/ou de stockage pour gaz sous forme liquide
FR2826715A1 (fr) Echangeur de chaleur pour recipient souple et dispositif de distribution de liquide alimentaire mettant en oeuvre cet echangeur
WO2004063086A1 (fr) Echangeur de chaleur pour recipient souple
EP0155201A1 (de) Abkühlungsvorrichtung für Gefrierstopfbüchse einer Ventilbetätigungsspindel
FR2566101A1 (fr) Chauffe-eau electrique
FR2728200A1 (fr) Dispositif de limitation de remplissage d'un reservoir de carburant et vehicule automobile equipe d'un tel dispositif
FR2649075A1 (fr) Couvercle pour recipient collecteur d'infusion
BE457257A (de)
BE392585A (de)
FR2849012A1 (fr) Dispositif pour la distribution d'un fluide conditionne dans un recipient souple comprenant des moyens de mise sous pression du fluide
FR3067335A1 (fr) Dispositif d'etancheite pour installation de separation de gaz
FR2487954A1 (fr) Application du tube a chaleur au chauffage geothermique par pompe a chaleur

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

17P Request for examination filed

Effective date: 19870203

AK Designated contracting states

Kind code of ref document: A1

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

17Q First examination report despatched

Effective date: 19880217

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

ITF It: translation for a ep patent filed

Owner name: BARZANO' E ZANARDO MILANO S.P.A.

REF Corresponds to:

Ref document number: 51290

Country of ref document: AT

Date of ref document: 19900415

Kind code of ref document: T

REF Corresponds to:

Ref document number: 3669774

Country of ref document: DE

Date of ref document: 19900426

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19900510

Year of fee payment: 5

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

Ref country code: GB

Payment date: 19900515

Year of fee payment: 5

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

Ref country code: BE

Payment date: 19900518

Year of fee payment: 5

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

Ref country code: CH

Payment date: 19900522

Year of fee payment: 5

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

Ref country code: LU

Payment date: 19900523

Year of fee payment: 5

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: 19900630

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

Ref country code: NL

Payment date: 19900630

Year of fee payment: 5

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

Ref country code: GB

Effective date: 19910604

Ref country code: AT

Effective date: 19910604

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

Ref country code: LI

Effective date: 19910630

Ref country code: CH

Effective date: 19910630

Ref country code: BE

Effective date: 19910630

BERE Be: lapsed

Owner name: S.A. POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES

Effective date: 19910630

Owner name: L' AIR LIQUIDE

Effective date: 19910630

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

Ref country code: NL

Effective date: 19920101

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

ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19940511

Year of fee payment: 9

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

Ref country code: SE

Payment date: 19940517

Year of fee payment: 9

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

Ref country code: DE

Payment date: 19940520

Year of fee payment: 9

EAL Se: european patent in force in sweden

Ref document number: 86903422.3

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

Ref country code: SE

Effective date: 19950605

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

Ref country code: FR

Effective date: 19960229

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

Ref country code: DE

Effective date: 19960301

EUG Se: european patent has lapsed

Ref document number: 86903422.3

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

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: 20050604