baber/WOPTO huggingface dataset:
Patent IE-59345-B1 (IE)
Title: New carbacylin processes for the preparation and their use as pharmaceuticals
IPC: C07D309/12
Filed: 1986-11-28
Abstract: Carbacycline derivatives of general formula (I), in which Y1 is the residue of Formula (II), R9 is the residue -(CH2)m-R6 or the residue -(CH2)m-o-[Z1-(CH2)m-p]x-[Z2-(CH2)m-q]y-R6, m = 2-20; o, p and q <= 19; x, y = 0, 1 or 2; Z1 is a cis-CH=CH-group, a trans-CH=CH-group or a -C=C-group, whereby each of these groups must be separated at least by one methyl group from the C-9 carbon atom of the carbacycline bi-cycle; Z2 is oxygen, sulphur, an NH or an N-methyl group, R6 is amino, methylamino, hydroxy, carboxy or mercapto; and process for their manufacture and their use as medicaments.
Patent IE-80522-B1 (IE)
Title: Multilayer female component for refastenable fastening device
Inventor: GOULAIT DAVID JOSEPH KENNETH
IPC: H01M10/48
Filed: 1992-07-01
Abstract: The female component for engaging a complementary hook component in a refastenable fastening device is capable of engaging a hook component that has flexible, resilient individual hook elements. The female component comprises at least two, and preferably three zones or layers. These include a first zone for admitting and engaging at least some of the hooks of the complementary hook component (the "entanglement" zone), a second zone for providing space for the hooks to occupy after they have been admitted by the entanglement zone (referred to as the spacing zone), and a backing adjacent to the spacing zone. The present invention also provides a fastening device having a hook fastening component and a female component that comprises the multi-layer female component of the present invention. The present invention also relates to disposable articles and more particularly to a disposable diaper having such an improved fastening device.
Patent IE-80861-B1 (IE)
Title: Novel crystal modification of 2,4-diamino-6-hydroxymethylpteridine hydrobromide
Inventor: WANGNICK CARSTEN
IPC: C07D475/08
Filed: 1996-01-31
Abstract: The invention provides a novel crystal modification of the compound 2,4-diamino-6-hydroxymethylpteridine hydrobromide, a process for its preparation and its use for preparing methotrexate. The novel crystal modification of 2,4-diamino-6-hydroxymethylpteridine hydrobromide is characterised by its X-ray powder diffraction spectrum obtained with Cu K* small Greek alpha *, and is distinguished in particular by the fact that only one equivalent of the brominating agent triphenylphosphine dibromide is needed for brominating the 6-hydroxymethyl group. No reaction with the amino groups in the 2 and 4 positions takes place. This facilitates the reaction to give 2,4-diamino-6-pteridinyl derivatives such as methotrexate.
Patent LU-100329-B1 (LU)
Title: Dispositif de refroidissement de fils galvanisés
Inventor: RICHE LOÏC
IPC: C23C2/38
Filed: 2017-06-28
Granted: 2019-01-08
Abstract: Un système de refroidissement pour une installation de revêtement de fils comprend : un bloc d'alimentation (12) avec une chambre (14) pour un fluide de refroidissement et une pluralité de sorties de fluide (16) ; et une pluralité de têtes de projection (18) munies chacune d'un ou plusieurs orifices (20) de projection du fluide de refroidissement vers un fil à refroidir (11), chaque tête de projection étant raccordée à une sortie de fluide (16) respective de sorte à alimenter en fluide un passage interne (54) de la tête de projection (18) s'étendant jusqu'à le ou les orifices de projection. Une vanne de service (22) associée à chaque tête de projection (18) de manière à contrôler sélectivement l'alimentation en fluide du passage interne (54) de la tête de projection. Un moyen de purge (30) est associé à chaque tête de projection (18), dont le déclenchement permet l'évacuation de fluide hors du passage interne (54), en vue d'arrêter la projection de fluide par le ou les orifices de projection (20).
Patent LU-102177-B1 (LU)
Title: Coke oven door sealing unit, coke oven chamber and coke oven battery
Inventor: THINNES CLAUDE
IPC: C10B25/16
Filed: 2020-11-03
Granted: 2022-05-03
Abstract: Coke oven door sealing unit for sealing a coke oven door against a sealing surface of a coke oven door frame of a coke oven chamber, the coke oven door sealing unit comprising: a coke oven door for fitting into the coke oven door frame of the coke oven chamber; a fixture device for holding a sealing piece opposite to the coke oven door frame in a peripheral area of the coke oven door, the sealing piece, wherein the sealing piece is configured to be operated in a first operating state or a second operating state; a seal protection element for isolating the sealing piece from the coke oven chamber; wherein, in a first operating state, the sealing piece is spaced at a first distance from a sealing surface arranged opposite of the sealing piece; and wherein, in a second operating state, the sealing piece contacts the sealing surface; such that in the second operating state, the sealing piece and the seal protection element at least partially form a cavity.
Patent LU-504480-B1 (LU)
Title: Production device for direct reduced iron
Inventor: WANG BIN
IPC: C21B13/00
Filed: 2023-06-12
Granted: 2023-12-13
Abstract: The invention discloses a production device for direct reduced iron, including a reduction furnace, wherein the top surface of the furnace is provided with a feeding channel, the middle outer wall of the reduction furnace is circumferentially equidistant with several first reduction gas inlets for supplying reduced gas, the bottom outer wall of the reduction furnace is symmetrically provided with two second reduction gas inlets for supplying reduced gas; the top of the reduction furnace is equipped with a furnace top gas outlet; a cooling furnace; the cooling furnace is equipped with a nitrogen inlet in the middle, the cooling furnace is equipped with a nitrogen outlet at the top, the cooling furnace is equipped with a discharge port at the bottom; a buffer section used to connect the reduction furnace and the cooling furnace, wherein the reduction furnace, buffer section, cooling furnace are sequentially arranged from top to bottom.
Patent NO-300271-B1 (NO)
Inventor: SHIOKAWA YOUICHI
IPC: A61P25/28
Filed: 1992-04-09
Abstract: A pyrazolopyridine compound of the formula : <CHEM>  wherein   R<1>   is aryl, R<2>   is acyl(lower)alkyl, and A   is lower alkenylene, and a pharmaceutically acceptable salt thereof, processes for their preparation and pharmaceutical compositions comprising them as an active ingredient in admixture with pharmaceutically acceptable carriers or excipients.
Patent NO-312578-B1 (NO)
Inventor: CLOZEL JEAN-PAUL
IPC: A61K31/16
Filed: 1994-07-14
Abstract: Pharmaceutical combination products which contain an inhibitor of the renin-angiotensin system ("RAS inhibitor") and an endothelin antagonist are described. These products are suitable for controlling or preventing hypertension and its sequelae and for treating heart failure.
Patent NO-306254-B1 (NO)
Inventor: MCLEAN MICHAEL JOSEPH
IPC: C07H21/04
Filed: 1994-09-30
Abstract: A support carrying a homocyclic or heterocyclic ring containing a first and second carbon atom wherein: (i) the first carbon atom is substituted by a nucleophilic group or a group convertible to a nucleophilic group on treatment with base; (ii) the second carbon atom is substituted by a hydroxy group, a hydroxy group protected by an acid labile protecting group, or a phosphate group substituted by an oligonucleotide; and (iii) the first and second carbon atoms are directly connected by a covalent bond; which is suitable for use in oligonucleotide synthesis. Methods for its preparation and use, and novel compounds for attachment to the support are described.
Patent NO-307514-B1 (NO)
Inventor: PETERSEN UWE
IPC: C07D491/06
Filed: 1995-10-03
Abstract: 7-(1,2,3,7a-Tetrahydroisoindol-2-yl)-4-quinolone (or naphthyridone)-3-carboxylic acid derivs. of formula T-Q (I) and their hydrates, acid addn. salts and alkali(ne earth) metal, silver and guanidinium salts are new. Pure diastereomers and enantiomers are included. Q = naphthyridine, quinoline or tricyclic analogue gp. of formula (Q1)-(Q3); R1 = 1-4C alkyl (opt. mono- or disubstd. by halogen or OH), 2-4C alkenyl, 3-6C cycloalkyl (opt. substd. by one or two F), bicyclo(1.1.1)pent-1-yl, 1,1-dimethylpropargyl, 3-oxetanyl, OMe, NH2, NHMe, NMe2 or phenyl (opt. mono- or disubstd. by halogen, NH2 or OH); R2 = OH, 1-3C alkoxy (opt. substd. by OH, OMe, NH2 or NMe2), benzyloxy, (5-methyl-2-oxo-1,3-dioxol-4-yl)methoxy, acetoxy-methoxy, pivaloyloxymethoxy, 5-indanyloxy, phthalidinyloxy, 3-acetoxy-2-oxobutoxy, CH2NO2, CH)COOMe)2 or CH)COOEt)2; R9 = H or 1-3C alkyl (opt. substd. by OMe, OH or halogen); R" = H, Me or CH2F; X = halogen or NO2; Y = H, halogen, NH2, OH, OMe, SH, Me , halomethyl or vinyl; A = N or CR7; R7 = H, halogen, CF3, OMe, OCHF2, Me, CN, vinyl or ethynyl; or R7+R1 = *OCH2CHMe, *SCH2CH2, *SCH2CHMe, *CH2CH2CHMe or *OCH2NR8, where * denotes the bond to A; R8 = H, Me or CHO; D = N or CR10; R10 = H, halogen, CF3, OMe, OCHF2 or Me; or R10+R9 = *OCH2, *NHCH2, *NMeCH2, *NEtCH2, *N(cyclopropyl)CH2 or *SCH2, where * denotes the bond to D; T = 1,2,3,7a-tetrahydroisoindol-2-yl gp. of formula (T); B = -(CH2)m-NR4R4 or -(CH2)m-OR5; m = 0 or 1; R3 = H, Me or (1-4C) alkoxycarbonyl; R4-R6 = H or Me. Also claimed are 18 intermediate hexa- or tetra-hydroisoindole derivs.
Patent AT-513252-B1 (AT)
Title: Verfahren zum Trennen azeotrop siedender Flüssigkeitsgemische
IPC: B01D61/36
Filed: 2013-02-26
Granted: 2014-03-15
Abstract: Die Erfindung betrifft ein Verfahren zum Trennen azeotrop siedender Flüssigkeitsgemische,die durch Rektifikation erhalten wurden, wobei die Dampfphase des azeotrop siedendenGemisches einer Dampfpermeation zugeführt wird, welche in zwei Stufen durchgeführt wird,wobei die erste Stufe mit permeatseitig relativ schwachem Vakuum, vorzugsweise zwischen0,10 bis 0,15 bar abs., und die zweite Stufe mit permeatseitig starkem Vakuum, vorzugsweisezwischen 0,01 und 0,05 bar abs., arbeitet. Zur Erzielung einer Einsparung an Energie undApparaten wird das Permeat der zweiten Stufe vorzugsweise mittels Dampfstrahlverdichtersoder mechanischen Verdichters komprimiert und gemeinsam mit dem Permeat der erstenStufe kondensiert.
Patent AT-510581-B1 (AT)
Title: Federscharnier für eine brille
IPC: G02C5/22
Filed: 2011-02-07
Granted: 2012-05-15
Abstract: Es wird ein Federscharnier für eine Brille mit zwei durch eine Scharnierachse (3) miteinander verbundenen Scharnierteilen (1, 2), von denen einer eine Lagergabel (4) für den anderen Scharnierteil (2) formt, der mit Hilfe eines Gleitstücks (6) in ei­nem Gehäuse (7) verschiebbar geführt ist, und mit einer Schraubenfeder (14) be­schrieben, die sich einerseits an einem Steg (8) des Gleitstücks (6) und anderseits an einem gehäusefesten Widerlager (13) abstützt, das durch eine Durchtrittsöffnung (16) im Scharnierteil (2) mit dem Gleitstück (6) koaxial zur Schraubenfeder (14) in das Gehäuses (7) eingesetzt ist. Um eine kurze Baulänge zu erreichen wird vorge­schlagen, dass das Widerlager (13) eine das scharnierseitige Ende der Schrauben­feder (14) aufnehmende Hülse (15) umfasst, die über das Gehäuse (7) in den Be­reich der Scharnierachse (3) vorsteht..
Patent AT-507439-B1 (AT)
Title: Elektrischer energiespeicher
Inventor: SITTE ALEXANDER
IPC: H01M50/548
Filed: 2009-03-09
Granted: 2010-05-15
Abstract: Ein Stromspeicher (1) besitzt wenigstens drei Kontakte (5 und 7), wobei die Kontakte (5 und 7) teilweise positive Kontakte (5) und teilweise negative Kontakte (7) sind. Die Kontakte (5 und 7) sind bezüglich der Außenform des Stromspeichers (1), insbesondere bezüglich einer Längsmittelebene (3) desselben, symmetrisch angeordnet. Auf diese Weise kann der Stromspeicher (1) in beliebiger Ausrichtung in ein Gerät (Verbraucher- oder Ladegerät) eingesetzt werden, ohne dass die Gefahr besteht, dass der Stromspeicher (1) mit unrichtiger Polung angeschlossen wird.
Patent AT-502090-B1 (AT)
Title: Exhaust system for internal combustion engine has first and second exhaust pipes, in whose opening area, uniting first and second exhaust pipes span angle at reference points of inner wall of exhaust pipes
Inventor: GROEGER MICHAEL
IPC: F02D9/10
Filed: 2005-05-31
Granted: 2007-07-15
Abstract: An exhaust system (10) has first and second exhaust pipes (11-16) in whose opening area (21-23), the uniting first and second exhaust pipes span an angle less than 30[deg], preferably less than 20[deg]. This angle is spanned by the tangents at reference points of the inner wall (11a-16a) of the exhaust pipes. These reference points are defined by an amount, which is approximately half the diameter of the first and second exhaust pipe, upstream from a first points of intersection of both tangents. The second points of intersection of the two tangents with the inner wall of the second exhaust pipes (15, 16) or the manifold (17) around an amount downstream from the two tangents is provided, which is larger than the diameter (d3) of the second pipe or the manifold. A number of cylinders (1-4) are provided with a preferably one-piece exhaust pipe assembly with at least one first exhaust pipe per cylinder. Two first exhaust pipes of both cylinders, which do not immediately follow one another in the firing order, lead into a second exhaust pipe, and two second exhaust pipes lead into a common manifold. Independent claims are also included for the following: (A) a motor vehicle; (B) a cylinder head; (C) an inlet manifold; and (D) a tensioning device.
Patent BG-60677-B1 (BG)
Title: Fungicide oxazolidinones
Inventor: ADAMS JUN JOHN B
IPC: C07D263/14
Filed: 1991-10-18
Abstract: A method of controlling plant disease using thioxooxazolidinones, oxazolidinediones and related heterocycles, some of which are new, and agriculturally suitable compositions containing them.
Patent BG-62474-B1 (BG)
Title: Application of terpene compounds for delaying the release of arachidic and of inflammatory mediators
Inventor: JUERGENS UWE R
IPC: A61K31/405
Filed: 1995-03-13
Abstract: The invention relates to the application of1.8-oxido-p-methane or methan-3-ol for the preparation ofmedicamentous forms such as capsules, infusion solutions orsolutions of intramuscular injectioins, for the treatment ofbronchial asthma. The active compound is combined withsystem-active medicaments such as immunosuppressive orcorticosteroids. It is applied in quantities form 100 to 900 mgfor 24 h.9 claims, 5 figures
Patent BR-PI0006854-B1 (BR)
Inventor: RAJANIEMI JAAKKO
IPC: H04W36/12
Filed: 2000-04-26
Abstract: A method for indicating a mobile station's (MS) location. A first radio network controller, RNC, acts as the mobile station's serving RNC (SRNC), for reporting the mobile station's location to the core network (CN). A second RNC acts as the mobile station's drift RNC (DRNC), for maintaining a radio connection with the mobile station. In response to fulfillment of at least one criterion in a first set of criteria, the mobile station (MS) sends location information about its location to the second RNC (DRNC) which forwards the location information to the first RNC (SRNC) for reporting to the core network (CN). There is also a second set of criteria for transforming the location information. In response to fulfillment of at least one criterion in the second set, the first RNC (SRNC) sends falsified information about the mobile station's location to the core network (CN).
Patent BR-0214267-B1 (BR)
Inventor: TALLIER BERNARD
IPC: A24F15/12
Filed: 2002-11-08
Abstract: 1. Wrapping formed around at least one pack (1) by means of a wrapping film (2), this pack (1) having at least one face (10), referred to as receiving face, against which a coupon (3) is placed having two external opposite faces (30, 31), which are:   a first external face (30), placed against the receiving face (10) of the pack (1), and a second external face (31), attached against a surface of the film (2) which, referred to as inner surface (20), is itself situated turned toward the pack (1), the opening of the wrapping film (2) being achieved by means of a tear strip (21) which separates the film (2) into two portions, which are a first portion (200) and a second portion (201), and which is situated, before tearing, disposed between the coupon (3) and the film (2), this wrapping being characterised in that the coupon (3) is fixed locally against the inner face (20) of the film (2) in such a way that, after opening of said film (2) by means of the tear strip (21), said coupon (3) remains attached to a single one of said first portion (200) of the film (2), and second portion (201) of said film (2) and tear strip (21) of said film (2).   <IMAGE>
Patent BR-0215616-B1 (BR)
Inventor: GOLLEY CHRISTOPHER R L
IPC: B41M5/00
Filed: 2002-12-23
Abstract: The present invention provides kaolin clay pigments having at least the following characteristics: Brightness (GE): at least about 89.0; Shape Factor: at least about 30; Brookfield viscosity, measured at 20 rpm and at less than or equal to about 65% solids: about 100 to about 700 centipoise; and Hercules viscosity, measured at 18 dynes and at less than or equal to about 65% solids: about 200 rpm to about 1000 rpm. Preferred kaolin sources include Brazilian kaolins, especially Rio Capim kaolins. The kaolin pigments of the present invention possess a combination of optical and physical properties, such as brightness, printability, and transfer efficiency, not previously seen in existing commercial products. They are useful, e.g., in paper filler and coating compositions, ink compositions, and printing applications, especially rotogravure printing.
Patent BR-PI0303266-B1 (BR)
Title: PROTEÍNA RECOMBINANTE Sm14, COMPOSIÇÃO IMUNOGÊNICA, E,KIT DE DIAGNÓSTICO.
Inventor: ANDREW J SIMPSON
IPC: C07K14/435
Filed: 2003-01-31
Abstract: "antígenos derivados de helmintos com capacidade de conferir proteção contra parasitos". o objetivo principal da presente invenção é o desenvolvimento de novas formas mutantes da proteína sm14 para a produção de volumes maiores de produção. as proteinas recombinantes aqui obtidas foram capazes de conferir proteção contra a infecção causada por schistosomas e fasciola. o nível de proteção das proteinas sm14 recombinantes obtidas na presente invenção foi semelhante àquele alcançado com o extrato salino do parasita. as proteinas mutantes da presente invenção conseguiram aproximadamente 100% de renaturação após o aquecimento a 80<198>c, diferente das formas selvangens da proteina sm14. além disso, após armazenamento por 2 meses a 4<198>c, as proteínas mutantes apresentaram uma menor perda de estrutura-<225> do que as formas selvagens, as quais mostraram formação de estrutura randômica, como mostrou a análise por dicroísmo circular, o que indica o sucesso das mutações.
Patent CH-700631-B1 (CH)
Inventor: CARETTO GIUSEPPE
IPC: B21D43/14
Filed: 2009-03-18
Abstract: La presente invenzione concerne uno stampo (2) per pressa per stampaggio progressivo di particolari metallici a partire da un nastro di lamiera (15), nel quale si adotta la nota tecnologia transfer che prevede lo stacco del particolare dal nastro di lamiera (15) sin dalla prima stazione di lavorazione (12). L’invenzione è caratterizzata dal fatto che le stazioni di lavorazione (12, 13, 13 I , 13 II , 13 l II , 14) sono disposte lungo un percorso circolare e che il trasferimento del particolare da una stazione di lavorazione alla successiva avviene mediante un braccio a stella (10) ruotante attorno ad un asse coincidente con il centro del percorso circolare citato, dove poi i singoli bracci del braccio a stella (10) sono dotati di mani di presa (11, 11 I , 11 I I , 11 l II , 11 l V ) che afferrano il particolare metallico e lo trasferiscono da una stazione di lavorazione alla successiva. I vantaggi dell’invenzione, rispetto alla nota tecnologia transfer lungo un percorso lineare, sono legati principalmente alla possibilità di attrezzare presse convenzionali per eseguire la tecnologia transfer, ottenendo una migliore economicità del lavoro grazie alla aumentata versatilità nell’uso della pressa, al minor ingombro, al minor consumo di energia ed alla rapidità di setup della pressa.
Patent CH-703046-B1 (CH)
Inventor: CLOT MARCEL
IPC: E01F9/677
Filed: 2010-04-23
Abstract: Die vorliegende Erfindung betrifft eine Pfostenanordnung mit einem Pfosten (1) mit mindestens einem aufsetzseitigen hohlen Ende und einer Pfostenbefestigung (2) mit mindestens einer in einem Fundament (5) verankerbaren Bodenhülse (4) und einem darin einschiebbaren Dorn (3), auf den der zu haltende Pfosten (1) mit seinem aufsetzseitigen Ende (10) aufsteckbar haltbar ist. Der erfindungsgemässe Pfosten (1) und die entsprechende Pfostenbefestigung ermöglicht eine temporäre Anordnung des Pfostens, wobei bei Nichtgebrauch die Bodenhülse (4) weder über das Fundament (5) hinausragt noch eine unerwünschte Öffnung verbleibt.
Patent CH-704859-B1 (CH)
Inventor: ERNST BEAT
IPC: F24F13/14
Filed: 2011-04-29
Abstract: Eine Dunstabzugshaube (10) ist mit einem nach unten offenen, vorzugsweise mehrere Filter aufnehmenden Gehäuse (11) versehen. An diesem Gehäuse (11) sind randseitig Flügel (15, 16) an unterschiedlichen Stellen des Gehäuses (11) anlenkbar, welche jeweils in eine vorzugsweise senkrecht nach unten gerichtete Stellung herunterklappbar sind. Diese Flügel (15, 16) bewirken damit eine Abschirmung gegen allfällige quere Luftströmungen (18) und/oder eine zusätzliche Führung der abzusaugenden Dünste.
Patent CH-700456-B1 (CH)
Inventor: SCHNEIDER MICHAEL
IPC: G01D5/244
Filed: 2008-09-04
Abstract: Die Erfindung betrifft ein Verfahren und eine Vorrichtung zur Herstellung von Massverkörperungen (1) sowie eine Massverkörperung. Um die Polgrenzen zwischen den in die Massverkörperung (1) einmagnetisierten Polen (N, S) scharf auszugestalten und zu beiden Seiten der Polgrenzen (6) symmetrische Magnetisierung zu erzielen, ist erfindungsgemäss vorgesehen, dass wenigstens eine Spur der Massverkörperung wenigstens abschnittsweise mit einem Grobmagnetisierungsfeld (13) mit einer ersten relativ zur Oberfläche der Massverkörperung ausgerichteten Feldrichtung (F G ) magnetisiert wird und abwechselnd Pole (N, S) unterschiedlicher Polarität erzeugt werden. Im Bereich zwischen den vom Grobmagnetisierungsfeld (13) erzeugten Polen wird die Spur wenigstens abschnittsweise mit einem Feinmagnetisierungsfeld (15) mit einer zweiten, zur Feldrichtung (F G ) des Grobmagnetisierungsfeldes (13) im Wesentlichen senkrechten Feldrichtung (F F ) magnetisiert. Bei der so erzeugten Massverkörperung ist die magnetische Sättigung der Spur an der Polgrenze gegenüber den in Spurrichtung benachbarten Abschnitten der Polgrenze verringert.
Patent CY-2165-B1 (CY)
Title: Heterocyclic compounds
Inventor: KRENITSKY THOMAS ANTHONY
IPC: C07H19/10
Filed: 2000-04-10
Abstract: 6-Alkoxy derivatives of Ara-G, and pharmaceutically acceptable esters thereof, are described as being useful in tumor therapy. Novel pharmaceutically acceptable esters, their preparation and pharmaceutical formulations containing them are also disclosed.
Patent DE-2406837-B1 (DE)
Title: Highly porous getter for room temp. operation - in electric discharge vessels, using sintered mixt. of zircon and graphite
Inventor: MAEGDEFESSEL HEINZ
IPC: H01J7/18
Filed: 1974-02-13
Abstract: Highly porous getter body for operation at room temp. in electric discharge vessels, consists of a non-volatile mixt. of zircon with up to 30 wt.% of graphite in the shape of a highly porous, sintered, hollow cylinder which is fixed by means of a metal sheet or rod, a heating coil, to parts of the electrode system in the discharge chamber. The novelty is that the sintered part contains a multiplicity of narrow through holes, i.e. open at both ends, running in an axial direction in the wall of the hollow cylinder. The object in using this shape is to ensure that a large surface area of the getter is available in the discharge chamber. Normal sintered parts can be made with a high internal porosity surrounded by an outer layer of denser material i.e. on the surface, which prevents the inner porous areas being available for gas absorption; the invention overcomes this problem. The getter speed does not fall off with time during use.