EP0597741B1 - Gas-tight container - Google Patents
Gas-tight container Download PDFInfo
- Publication number
- EP0597741B1 EP0597741B1 EP93402531A EP93402531A EP0597741B1 EP 0597741 B1 EP0597741 B1 EP 0597741B1 EP 93402531 A EP93402531 A EP 93402531A EP 93402531 A EP93402531 A EP 93402531A EP 0597741 B1 EP0597741 B1 EP 0597741B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- film
- tray
- layer
- hot
- orifice
- 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
Links
- 239000000126 substance Substances 0.000 claims abstract description 8
- 238000002844 melting Methods 0.000 claims description 2
- 230000008018 melting Effects 0.000 claims description 2
- 239000004831 Hot glue Substances 0.000 claims 1
- 235000013305 food Nutrition 0.000 abstract description 11
- 238000007789 sealing Methods 0.000 description 12
- 238000010411 cooking Methods 0.000 description 11
- 239000011347 resin Substances 0.000 description 10
- 229920005989 resin Polymers 0.000 description 10
- 239000012943 hotmelt Substances 0.000 description 8
- 238000001816 cooling Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000004806 packaging method and process Methods 0.000 description 4
- 239000003292 glue Substances 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 2
- 239000000805 composite resin Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000001954 sterilising effect Effects 0.000 description 2
- 238000004659 sterilization and disinfection Methods 0.000 description 2
- 235000007586 terpenes Nutrition 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 229920006125 amorphous polymer Polymers 0.000 description 1
- 235000019568 aromas Nutrition 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 239000007888 film coating Substances 0.000 description 1
- 238000009501 film coating Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000005457 ice water Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 150000003505 terpenes Chemical class 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
- B65D77/22—Details
- B65D77/225—Pressure relief-valves incorporated in a container wall, e.g. valves comprising at least one elastic element
Definitions
- the present invention relates to gas-tight containers, in particular for food products or other products intended to undergo heat treatment, of the "tub" type.
- Dishes prepared in the food industry are generally packaged in packages formed by trays made of aluminum foil, synthetic resin or various complexes, such as cartons with film coating.
- Cooking of culinary preparations takes place before their introduction into the trays. The latter are closed after cooking, which causes, due to transfers, the risk of soiling and contamination.
- an automatic closure device for packaging for food preparations with deferred consumption by using on the one hand the expansion and exhaust effects of hot air or steam during the operations. cooking, and on the other hand the contraction during cooling to ensure by non-return valve the hermetic sealing of the packaging by eliminating pollution and loss of aromas occurring during the closing operation, characterized by the combination on the one hand of a capacity formed by a double partitioning at the preferentially axial part of a package with upper and lower perforations and on the other hand by the positioning of a non-return valve or sealing washer in the intermediate space, it being specified that said washer has peripheral orifices and the like, and is placed freely to carry out a vertical displacement from top to bottom and bottom up, either to release the orifices, or to close them with guidance to prevent any lateral movement which could disturb the evacuations and obturations.
- French patent FR-A-2 656 280 describes a tray provided with a tongue hinged on the edge, folded inwards after filling with food and before sealing the sealing film, said hinged tongue comprising on its horizontal face a perforated seat in which is deposited a drop of composite resin becoming porous at a determined temperature.
- this packaging requires, in addition to a resin becoming porous, a complex sealing tool capable, simultaneously, of sealing the sealing film all around the tray and all around the seat, and of perforating the film at the precise location where it is located.
- the drop of fusible composite resin thanks to a point provided for this purpose.
- the complexity of the tray itself makes the production of molds delicate and expensive, and the hinged tongue requires additional manipulation for its positioning.
- the object of the present application is a tray allowing the elimination of these drawbacks. Indeed, it does not require an articulated tongue and is therefore simpler and less expensive.
- the manufacturing mold is also less expensive to manufacture and the sealing tool does not require a point to perforate the film at the location of the drop of fusible resin, the sealing taking place automatically by the sole effects of the heat treatment usually applied. to a tray and cooling.
- the container according to the invention comprises a rim body hermetically sealed with a film and having a hole in the rim, characterized by a layer of a substance, having a melting point between 65 ° C and 150 ° C, interposed between the film and the edge part around and possibly above the hole.
- the layer can be deposited on the film or on the edge.
- the substance is preferably a fusible glue, in particular a food glue, such as food hot-melt glues of appropriate viscosity. It may in particular be hot-melt based on terpene resin and / or vinyl polymer.
- a hot melt is as follows: - Oil: ⁇ 10% by weight - Phenolic terpene resin ⁇ 50% by weight - Ethyl vinyl acetate (28% vinyl acetate): ⁇ 25% by weight - Ethyl vinyl acetate (33% vinyl acetate): ⁇ 5% by weight - Amorphous polymer: ⁇ 10% by weight
- the tray, Figures 1 to 3 consists of a body 2 and a hot-melt valve formed by a single orifice 10 with a diameter of 0.7 to 2 mm formed on the rim 3 of the body 2, preferably as close as possible to the internal edge 11, a thin layer of hot-melt resin 12 being deposited all around the orifice, on said rim.
- the tray After filling with food products, the tray is sealed with a film 7 welded around its periphery.
- the film 7 lifts under the effect of the overpressure which is created inside, which frees the orifice 10 and allows degassing (arrow 13, FIGS. 2 and 4) products and the evacuation of the internal pressure of the tray which takes place through this orifice while the hot-melt resin 12 is in the liquid state.
- the air, the water vapor and the gases 5 may escape through the fuse valve, the orifice bringing the inside of the tray 2 into communication with the outside.
- the thin layer of hot-melt resin can, in another example of application, be coated on the internal face of the film 7, either in marked locations corresponding to the location of the orifice (s) 10 of the tray ( Figures 4 and 5) , or in a uniform layer over the entire surface of the film
- the vacuum created in tray 2 by temperature difference adds to the preservation qualities of food products, which are immune to the risk of oxidation. It is also for example that the colors of green vegetables are perfectly preserved.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Packages (AREA)
- Package Specialized In Special Use (AREA)
- Table Devices Or Equipment (AREA)
- General Preparation And Processing Of Foods (AREA)
- Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
- Cookers (AREA)
Abstract
Description
La présente invention concerne les récipients étanches au gaz, notamment de produits alimentaires ou d'autres produits destinés à subir un traitement thermique, de type "barquette".The present invention relates to gas-tight containers, in particular for food products or other products intended to undergo heat treatment, of the "tub" type.
Les plats cuisinés dans l'industrie alimentaire sont généralement conditionnés dans des emballages formés par des barquettes en feuille d'aluminium, en résine synthétique ou en complexe divers, tels que des cartons avec pelliculage de films.Dishes prepared in the food industry are generally packaged in packages formed by trays made of aluminum foil, synthetic resin or various complexes, such as cartons with film coating.
La cuisson des préparations culinaires a lieu avant leur introduction dans les barquettes. La fermeture de ces dernières est effectuée après la cuisson, ce qui provoque, en raison des transvasements, des risques de souillures et de contaminations.Cooking of culinary preparations takes place before their introduction into the trays. The latter are closed after cooking, which causes, due to transfers, the risk of soiling and contamination.
Au FR-A- 2 629 060, on décrit un dispositif d'obturation automatique pour le conditionnement pour préparations alimentaires à consommation différée par utilisation d'une part des effets de dilatation et d'échappement d'air chaud ou de vapeur lors des opérations de cuisson, et d'autre part de la contraction lors du refroidissement pour assurer par clapet anti-retour l'obturation hermétique du conditionnment en supprimant les pollutions et pertes d'arômes se produisant en cours d'opération de fermeture, se caractérisant par la combinaison d'une part d'une capacité formée par un double cloisonnement à la partie préférentiellement axiale d'un conditionnement avec perforations supérieures et inférieure et d'autre part par le positionnement d'un clapet anti-retour ou rondelle d'obturation dans l'espace intercalaire, étant précisé que ladite rondelle comporte des orifices périphériques et autres, et est placée librement pour effectuer un déplacement vertical de haut en bas et de bas en haut, soit pour libérer les orifices, soit pour les obturer avec guidage pour empêcher tout déplacement latéral pouvant perturber les évacuations et obturations.In FR-A- 2 629 060, an automatic closure device is described for packaging for food preparations with deferred consumption by using on the one hand the expansion and exhaust effects of hot air or steam during the operations. cooking, and on the other hand the contraction during cooling to ensure by non-return valve the hermetic sealing of the packaging by eliminating pollution and loss of aromas occurring during the closing operation, characterized by the combination on the one hand of a capacity formed by a double partitioning at the preferentially axial part of a package with upper and lower perforations and on the other hand by the positioning of a non-return valve or sealing washer in the intermediate space, it being specified that said washer has peripheral orifices and the like, and is placed freely to carry out a vertical displacement from top to bottom and bottom up, either to release the orifices, or to close them with guidance to prevent any lateral movement which could disturb the evacuations and obturations.
Ce dispositif est très compliqué à fabriquer. Dans la variante des figures 4, 5 et 6, on prévoit de le compliquer davantage, en appliquant un auto-collant, c'est-à-dire un support muni d'une couche de colle, tel qu'une étiquette, à la face inférieure des clapets antiretour pour éviter une ouverture accidentelle par chocs, déformations ou autres en cours de conservation. Cet auto-collant doit se diluer à chaud et n'adhérer qu'après refroidissement. Dans une autre variante des figures 7, 8 et 9, la barquette est operculée par un complexe de deux films contrecollés l'un à l'autre à l'exception de bandes longitudinales non enduites. Dans la variante des figures 10, 11 et 12, l'orifice supérieur d'un tube central est obturé ou libéré par un film de scellage qui agit comme une membrane. Dans une autre variante des figures 13, 14 et 15, un orifice ménagé sur le plat-rebord de la barquette forme le siège d'un clapet obturé par le film de scellage; on ne prévoit pas d'utiliser de substance fusible. La multiplicité de ces variantes, dont aucune ne s'est imposé en pratique, montre que l'on recherche toujours un moyen sur, mais simple, de permettre à l'air et à la vapeur d'eau contenus dans le récipient de s'échapper pendant la cuisson, lorsqu'il y a surpression, tout en empêchant l'air extérieur de pénétrer dans la barquette lors du refroidissement, lorsque la dépression se produit à l'intérieur, de sorte que les aliments ou autres soient pasteurisés ou stérilisés lors de la cuisson dans un emballage stérile, ce qui assure une conservation de plusieurs semaines, même sans surgélation ou autres moyens complémentaires tout en préservant la couleur des denrées contenues dans la barquette.This device is very complicated to manufacture. In the variant of FIGS. 4, 5 and 6, provision is made to further complicate it, by applying a sticker, that is to say a support provided with a layer of adhesive, such as a label, to the underside of non-return valves to prevent accidental opening by shock, deformation or others during storage. This sticker must be diluted hot and only adhere after cooling. In another variant of FIGS. 7, 8 and 9, the tray is sealed with a complex of two films laminated to each other with the exception of uncoated longitudinal strips. In the variant of FIGS. 10, 11 and 12, the upper orifice of a central tube is closed or released by a sealing film which acts like a membrane. In another variant of FIGS. 13, 14 and 15, an orifice formed on the flat edge of the tray forms the seat of a valve closed by the sealing film; no fusible substance is planned. The multiplicity of these variants, none of which has imposed itself in practice, shows that we are always looking for a safe, but simple, way to allow the air and water vapor contained in the container to s' escape during cooking, when there is overpressure, while preventing outside air from entering the tray during cooling, when the vacuum occurs inside, so that food or the like is pasteurized or sterilized during cooking in a sterile packaging, which ensures conservation of several weeks, even without freezing or other complementary means while preserving the color of the foodstuffs contained in the tray.
Pour y parvenir, le brevet français FR-A-2 656 280 décrit une barquette pourvue d'une languette articulée sur le bord, repliée vers l'intérieur après remplissage par les aliments et avant scellement du film obturateur, ladite languette articulée comportant sur sa face horizontale un siège perforé dans lequel est déposée une goutte de résine composite devenant poreuse à une température déterminée.To achieve this, French patent FR-A-2 656 280 describes a tray provided with a tongue hinged on the edge, folded inwards after filling with food and before sealing the sealing film, said hinged tongue comprising on its horizontal face a perforated seat in which is deposited a drop of composite resin becoming porous at a determined temperature.
Cependant, ce conditionnement nécessite, outre une résine devenant poreuse, un outil de scellement complexe capable, simultanément, de souder le film obturateur tout autour de la barquette et tout autour du siège, et de perforer le film à l'endroit précis où est située la goutte de résine composite fusible grâce à une pointe prévue à cet effet. En outre, la complexité de la barquette elle-même rend la réalisation des moules délicate et onéreuse, et la languette articulée exige une manipulation supplémentaire pour sa mise en position.However, this packaging requires, in addition to a resin becoming porous, a complex sealing tool capable, simultaneously, of sealing the sealing film all around the tray and all around the seat, and of perforating the film at the precise location where it is located. the drop of fusible composite resin thanks to a point provided for this purpose. In addition, the complexity of the tray itself makes the production of molds delicate and expensive, and the hinged tongue requires additional manipulation for its positioning.
L'objet de la présente demande est une barquette permettant la suppression de ces inconvénients. En effet, elle ne nécessite pas de languette articulée et est donc plus simple et moins onéreuse. Le moule de fabrication est également moins cher à fabriquer et l'outil de scellement ne nécessite pas de pointe pour perforer le film à l'endroit de la goutte de résine fusible, le scellement ayant lieu automatiquement par les seuls effets du traitement thermique appliqué habituellement à une barquette et du refroidissement.The object of the present application is a tray allowing the elimination of these drawbacks. Indeed, it does not require an articulated tongue and is therefore simpler and less expensive. The manufacturing mold is also less expensive to manufacture and the sealing tool does not require a point to perforate the film at the location of the drop of fusible resin, the sealing taking place automatically by the sole effects of the heat treatment usually applied. to a tray and cooling.
Le récipient suivant l'invention comprend un corps à rebord operculé hermétiquement par un film et ayant un trou ménagé dans le rebord, caractérisé par une couche en une substance, ayant un point de fusion compris entre 65°C et 150°C, interposée entre le film et la partie du rebord autour et éventuellement au-dessus du trou.The container according to the invention comprises a rim body hermetically sealed with a film and having a hole in the rim, characterized by a layer of a substance, having a melting point between 65 ° C and 150 ° C, interposed between the film and the edge part around and possibly above the hole.
La couche peut être déposée sur le film ou sur le rebord. La substance est, de préférence, une colle fusible, notamment alimentaire, telle que des colles Hot-melt alimentaires de viscosité appropriée. Ce peut être notamment des hot-melt à base de résine terpénique et/ou de polymère vinylique. Un exemple de hot-melt est le suivant:
Sur les dessins schématiques annexés, donnés à titre d'exemple non limitatif d'une des formes de réalisation de l'objet de l'invention :
- la figure 1 représente une coupe verticale d'une barquette avec résine fusible disposée autour de l'orifice, avant cuisson de la préparation alimentaire,
- les figures 2 et 3 montrent la même barquette, respectivement durant la cuisson du produit, avec la valve fusible ouverte, et après cuisson, la valve fusible étant refermée, et
- les figures 4 et 5 représentent, durant les mêmes phases que les figures 2 et 3, une barquette avec résine fusible disposée sur le film assurant sa fermeture.
- FIG. 1 represents a vertical section of a tray with fusible resin placed around the orifice, before cooking the food preparation,
- FIGS. 2 and 3 show the same tray, respectively during the cooking of the product, with the fuse valve open, and after cooking, the fuse valve being closed, and
- Figures 4 and 5 show, during the same phases as Figures 2 and 3, a tray with fusible resin disposed on the film ensuring its closure.
La barquette, figures 1 à 3, est constituée d'un corps 2 et d'une valve thermofusible formée d'un simple orifice 10 d'un diamètre de 0,7 à 2 mm pratiqué sur le rebord 3 du corps 2, de préférence le plus près possible de l'arête interne 11, une fine couche de résine thermofusible 12 étant déposée tout autour de l'orifice, sur ledit rebord.The tray, Figures 1 to 3, consists of a
Après remplissage de produits alimentaires, la barquette est operculée à l'aide d'un film 7 soudé sur son pourtour. Durant la cuisson ou la stérilisation du contenu 6, le film 7 se soulève sous l'effet de la surpression qui se crée à l'intérieur, ce qui libère l'orifice 10 et permet le dégazage (flèche 13, figures 2 et 4) des produits et l'évacuation de la pression intérieure de la barquette qui s'effectuent au travers de cet orifice alors que la résine thermofusible 12 est à l'état liquide. Ainsi, durant la phase de la cuisson, l'air, la vapeur d'eau et les gaz 5 pourront s'échapper par la valve fusible, l'orifice mettant l'intérieur de la barquette 2 en communication avec l'extérieur.After filling with food products, the tray is sealed with a
Au terme de la cuisson ou de la stérilisation, un refroidissement rapide intervient par un moyen connu: air froid, douchage d'eau glacée ou procédé cryogénique. Cette opération a pour effet de créer, par différence de température, le vide à l'intérieur de la barquette. Le film 7 d'operculage, lors de cette importante dépression, est aspiré vers l'intérieur de la barquette et se plaque sur l'arête interne 11 de celle-ci, obturant en même temps l'orifice 10. La résine thermofusible 12 assure alors un collage étanche du film sur le rebord 3 de la barquette empêchant l'air extérieur d'y pénétrer (figures 3 et 5).At the end of cooking or sterilization, rapid cooling takes place by known means: cold air, showering with ice water or a cryogenic process. This operation has the effect of creating, by temperature difference, the vacuum inside the tray. The
La fine couche de résine thermofusible peut, dans un autre exemple d'application, être enduite sur la face interne du film 7, soit en des endroits repérés correspondant à l'emplacement du ou des orifices 10 de la barquette (figures 4 et 5), soit en une couche uniforme sur toute la surface du film.The thin layer of hot-melt resin can, in another example of application, be coated on the internal face of the
Le vide créé dans la barquette 2 par différence de température ajoute aux qualités de préservation des produits alimentaires, qui sont à l'abri des risques d'oxydation. C'est aussi par exemple que les couleurs des légumes verts sont parfaitement conservées.The vacuum created in
Claims (6)
- Container comprising a body (2) with a lip (3) hermetically sealed by a film (7) and with a hole (10) formed in the lip (3), characterized by a layer (12) of a substance having a melting point between 65°C and 150°C, interposed between the film (7) and the part of the lip (3) around the hole (10) and optionally above the hole (10).
- Container according to Claim 1, characterized in that the layer (12) is deposited on the film (7).
- Container according to Claim 1, characterized in that the layer (12) is deposited on the lip (3).
- Container according to Claim 1, characterized in that the substance is a hot-melt adhesive.
- Container according to Claim 1, characterized in that the substance is a food-quality substance.
- Container according to Claim 1, characterized in that the layer (12) is closer to the inner edge (11) than to the outer edge.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9213672A FR2698082B1 (en) | 1992-11-13 | 1992-11-13 | Gas tight container. |
FR9213672 | 1992-11-13 | ||
CA002132647A CA2132647A1 (en) | 1992-11-13 | 1994-09-22 | Gastight vessel |
US08/314,858 US5587192A (en) | 1992-11-13 | 1994-09-29 | Ventable container |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0597741A1 EP0597741A1 (en) | 1994-05-18 |
EP0597741B1 true EP0597741B1 (en) | 1997-01-02 |
Family
ID=27169858
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP93402531A Expired - Lifetime EP0597741B1 (en) | 1992-11-13 | 1993-10-14 | Gas-tight container |
Country Status (7)
Country | Link |
---|---|
US (1) | US5587192A (en) |
EP (1) | EP0597741B1 (en) |
AT (1) | ATE147044T1 (en) |
CA (1) | CA2132647A1 (en) |
DE (1) | DE69307105T2 (en) |
ES (1) | ES2096247T3 (en) |
FR (1) | FR2698082B1 (en) |
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-
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- 1992-11-13 FR FR9213672A patent/FR2698082B1/en not_active Expired - Fee Related
-
1993
- 1993-10-14 AT AT93402531T patent/ATE147044T1/en not_active IP Right Cessation
- 1993-10-14 EP EP93402531A patent/EP0597741B1/en not_active Expired - Lifetime
- 1993-10-14 ES ES93402531T patent/ES2096247T3/en not_active Expired - Lifetime
- 1993-10-14 DE DE69307105T patent/DE69307105T2/en not_active Expired - Fee Related
-
1994
- 1994-09-22 CA CA002132647A patent/CA2132647A1/en not_active Abandoned
- 1994-09-29 US US08/314,858 patent/US5587192A/en not_active Expired - Fee Related
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EP0597741A1 (en) | 1994-05-18 |
FR2698082B1 (en) | 1994-12-23 |
FR2698082A1 (en) | 1994-05-20 |
US5587192A (en) | 1996-12-24 |
ATE147044T1 (en) | 1997-01-15 |
CA2132647A1 (en) | 1996-03-23 |
DE69307105T2 (en) | 1997-04-17 |
DE69307105D1 (en) | 1997-02-13 |
ES2096247T3 (en) | 1997-03-01 |
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