baber/WOPTO huggingface dataset:
Patent BR-112022023987-A2 (BR)
Title: Complexo imunomodulador e usos do mesmo para terapia
Inventor: MICHEL LEONETTI
IPC: C07K16/28
Filed: 2021-05-28
Abstract: COMPLEXO IMUNOMODULADOR E USOS DO MESMO PARA TERAPIA. A invenção se refere a um complexo molecular que consiste em pelo menos um ligante de um açúcar sulfatado da família glicosaminoglicano ligado a pelo menos um ligante de uma molécula de superfície de células apresentadoras de antígeno ou células NK ou NKT, para uso como um medicamento imunomodulador, em particular na imunoterapia de câncer e doenças infecciosas.
Patent BR-112022024644-A2 (BR)
Title: Linhagens celulares com múltiplas ancoragens para inserção de gene
Inventor: GREGORY T BLECK
IPC: C12N9/22
Filed: 2021-06-02
Abstract: LINHAGENS CELULARES COM MÚLTIPLAS ANCORAGENS PARA INSERÇÃO DE GENE. A presente invenção refere-se às linhagens celulares hospedeiras contendo múltiplos sítios de ancoragem para inserção de um constructo de ácidos nucleicos e, em particular, constructos de ácidos nucleicos que expressam um gene exógeno de interesse.
Patent BR-112023000414-A2 (BR)
Title: Aparelho de ar-condicionado e caixa de controle elétrico.
Inventor: ZHANG TIEGANG
IPC: F24F1/22
Filed: 2021-08-25
Abstract: APARELHO DE AR-CONDICIONADO E CAIXA DE CONTROLE ELÉTRICO. O presente pedido revela um aparelho de ar-condicionado e uma caixa de controle elétrico. A caixa de controle elétrico compreende um corpo de caixa, uma placa de montagem, um dissipador de calor, um componente eletrônico e um ventilador de dissipação de calor. O corpo de caixa é dotado de uma cavidade de montagem. O painel de montagem é disposto na cavidade de montagem para formar uma primeira câmara e uma segunda câmara localizada em dois lados do painel de montagem. Uma primeira ventilação de ar e uma segunda ventilação de ar são dispostas no painel de montagem e são separadas. A primeira ventilação de ar e a segunda ventilação de ar são conectadas à primeira câmara e à segunda câmara. O dissipador de calor é pelo menos parcialmente disposto na primeira câmara. O componente eletrônico é disposto na segunda câmara e em conexão termicamente condutora com o dissipador de calor. O ventilador de dissipação de calor é usado para soprar ar de modo que o ar flua da primeira câmara para a segunda câmara por meio da primeira ventilação de ar. Dessa maneira, circulação de ar é formada entre a primeira câmara e a segunda câmara para resfriar a caixa de controle elétrico vedada. Ademais, a caixa de controle elétrico é vedada e é, desse modo, à prova d'água, resistente a insetos, resistente à poeira e resistente à umidade, tendo, dessa maneira, maior confiabilidade de controle elétrico.
Patent BR-112023004277-A2 (BR)
Title: Transmitir um bloco de transporte priorizado
Inventor: JOACHIM LOEHR
IPC: H04L1/18
Filed: 2021-09-08
Abstract: TRANSMITIR UM BLOCO DE TRANSPORTE PRIORIZADO. Aparelhos, métodos e sistemas são divulgados para transmitir um bloco de transporte priorizado. Um método (500) inclui determinar (502), em um equipamento de usuário, uma primeira prioridade correspondente a um primeiro bloco de transporte associado a um primeiro processo de solicitação de repetição automática híbrida pendente para retransmissão em um recurso de concessão de enlace ascendente configurado. O método (500) inclui determinar (504) uma segunda prioridade correspondente a uma transmissão inicial no recurso de concessão de enlace ascendente configurado de um segundo bloco de transporte associado a um segundo processo de solicitação de repetição automática híbrida. O método (500) inclui selecionar (506) o segundo processo de solicitação de repetição automática híbrida e transmitir a transmissão inicial do segundo bloco de transporte no recurso de concessão de enlace ascendente configurado antes de retransmitir o primeiro bloco de transporte.
Patent BR-112023005488-A2 (BR)
Title: Antena de comunicação móvel
Inventor: PHILIPP PONN
IPC: H01Q19/10
Filed: 2020-12-22
Abstract: ANTENA DE COMUNICAÇÃO MÓVEL. Uma antena de comunicação móvel (1) compreende um arranjo de refletor (3), uma pluralidade de radiadores de polarização dupla (3, 3a, 3b, 3c) e uma primeira estrutura de quadro de suporte (4). A primeira estrutura de quadro de suporte (4) compreende uma primeira seção de suporte (14) e uma segunda seção de suporte (15). A primeira e a segunda seções de suporte (14, 15) se estendem na direção longitudinal da antena de comunicação móvel (1). A primeira estrutura de quadro de suporte (4) compreende um elemento de conexão (16) que conecta a primeira e a segunda seções de suporte (14, 15) de maneira semelhante a uma ponte e abrange um primeiro espaço de recepção (17). A primeira estrutura de quadro de suporte (4) é conectada direta ou indiretamente ao arranjo de refletor (2). O elemento de conexão (16) compreende uma pluralidade de seções de montagem (18), em que um radiador de polarização dupla (3, 3a) é montado em pelo menos algumas ou todas as seções de montagem (18).
Patent CS-42692-A3 (CS)
Title: 9-aminotetrahydroacridines and derived compounds, process of theirpreparation and their use as medicaments
Inventor: SHUTSKE GREGORY MICHAEL
IPC: C07D219/06
Filed: 1992-02-12
Abstract: The present invention relates to 9-amino-1,2,3,4-tetrahydroacridines and related compounds of formula 1 <CHEM> wherein Y ix C=0 or CHOH; R<1> is hydrogen or loweralkyl; R<2> is hydrogen, loweralkyl, or phenylloweralkyl; R<3> is hydrogen, OR<4> wherein R<4> is hydrogen or COR<5> wherein R<5> is loweralkyl, X is hydrogen, loweralkyl, halogen, loweralkoxy, hydroxy, or trifluoromethyl, the geometric or optical isomers thereof, N-oxides, thereof, or the pharmaceutically acceptable acid addition salts thereof, which are useful in relieving memory dysfunction and are thus indicated in the treatment of Alzheimer's disease. The invention relates further to a process for the preparation of the above compounds.
Patent CZ-83792-A3 (CZ)
Title: Process of simultaneous removal of solid and liquid waste substances
Inventor: RABE WOLFGANG DIPL CHEM
IPC: C10J3/46
Filed: 1992-03-19
Abstract: Method for simultaneous disposal of solid and liquid wastes including the steps of gasifying in a fixed bed pressure gasifier a gasification material containing coal and 1 to 70% of a solid waste material containing sulfur, hydrocarbons, PCBs, dioxins and/or heavy metals, to form a pollutant and dust-containing fixed bed pressure gasification crude gas; post-gasifying in a post-gasifier at a temperature greater than 1,000 DEG  C. and with a dwell time of more than 2 seconds the crude gas together with an oxygen-containing gas and a liquid waste portion having a heat content of greater than 20,000 kJ/kg and containing hydrocarbons, PCBs and/or heavy metals to form a disposal gas; cooling the disposal gas to less than 200 DEG  C. and cleaning it or process waste water to form a mixture of pollutant slurries; gasifying in an additional flow gasifier a mixture of the pollutant slurries, another liquid waste portion having a heat content of greater than 20,000 kJ/kg and containing hydrocarbons, sulfur, PCBs, heavy metals and/or dioxins and 3 to 35% of solid components containing greater than 10% mineral components and sulfur, heavy metals, PCBs, dioxins, furans and/or hydrocarbons, at a temperature more than 50 DEG  C. above a melting point of the mineral components.
Patent CZ-43797-A3 (CZ)
Title: Metallic supporting frame for low-profile elevated panel floors
Inventor: SCHILHAM JAN J
IPC: H02G3/38
Filed: 1995-08-22
Abstract: A raised flooring system and methods of forming components of such a system are disclosed. Thin sheet metal is used, typically galvanized steel, to form a first strip (30) having numerous pedestals (10) formed in a spaced apart relation on the strip (30) and connected via wings (40) extending from the first strip to wings extending from a second strip (30), thereby forming an overall, grid-like pattern of pedestals (10). The pedestals (10) are used to maintain floor panels (60) above a network of channels in which conduit, cables, hoses, pipe and other materials can be routed. The pedestals are punched and formed from strips of sheet metal and have an overall shape generally that of a tower supported by two legs that may have rounded edges for increased load-bearing capacity. The wings that are designed to interlock with corresponding wings from another strip may also be formed from the pedestal-bearing strips.
Patent CH-644243G-A3 (CH)
IPC: G04F10/04
Filed: 1982-05-06
Abstract: An apparatus for measuring the delay time interval between electrical pulse signals, particularly in conjunction with electrooptical range finders. A coarse measuring counter counts clock pulses from a quartz oscillator during the interval and a fine measuring interpolator determines the residual time from the end of the interval to the next clock pulse. Residual time at the start of the measuring interval is avoided by exactly synchronizating the start of measurement with a timing pulse front (n+2) of the quartz oscillator.
Patent CH-660550G-A3 (CH)
IPC: G04B23/04
Filed: 1984-09-21
Abstract: An hour detection wheel and a minute detection wheel for detecting an alarm signaling time are provided in combination with an hour time wheel and a minute time wheel respectively. An alarm signaling time indicating block having a minute indication drum connected to an alarm signaling time setting member and marked with minute-scale alarm signaling time graduations and an hour indication drum marked with hour-scale alarm signaling time graduations and adapted to be turned intermittently by the minute indication drum is disposed outside a clock movement having the hour and the minute detection wheels and the minute indication drum interlocked by gear trains with the hour and the minute detection wheels.
Patent CZ-261892-A3 (CZ)
Title: Process for preparing beta-d-o-galactosides of ergot alkaloids
Inventor: KREN VLADIMIR ING CSC
IPC: C12P19/44
Filed: 1992-08-25
Abstract: This method of preparing β-D-O-galactosides of ergot alkaloids elymoclavine, lysergol, 9,10-dihydrolysergol, chanoclavine and ergometrine which consists of treating these ergot alkaloids with beta-galactosidase in the presence of a donor of beta-galactosyl residuum, such as lactose or p-nitrophenyl-β-galactoside in a buffer with a pH of 3 to 8 at a temperature of 4 to 50 degrees C, then the product is separated, for example by chromatography on a silica gel or by high-performance liquid chromatography on columns with a reverse phase.
Patent CS-308591-A3 (CS)
Title: Solid component of a catalyst for ethylene homopolymerization and copolymerization
Inventor: LUCIANI LUCIANO
IPC: C08F4/60
Filed: 1991-10-10
Abstract: A solid component of a catalyst for the (co)polymerization of ethylene which includes magnesium, halogen and titanium is obtainable by   (i) dissolving a dialkyl magnesium compound, a silicon halide and, optionally, an alkyl halide in an inert organic solvent and maintaining contact until a granular solid precipitates; (ii) reacting the granular solid with a titanium halide, alkoxide or halogen-alkoxide, to produce a solid catalyst component; and (iii) activating this solid component by contacting it with alkyl aluminium halide if a titanium alkoxide or halogen-alkoxide has been used in step (ii).
Patent CZ-106595-A3 (CZ)
Inventor: KRYSTOF MICHAEL ING
IPC: E04B1/48
Filed: 1995-04-26
Abstract: Kotvící prvek k napojenístěn ze silikátových materiálů, stavěných
současně či s časovým odstupem, a to zejména v případech,
kdy skladebné rozměry prvků vytvářejících stěny
zděním či litím, jsou vzájemně odlišné. Kotvící prvek vytvořený
jako plechový úhelník, kdy délka ramen (3), (4), (8)
a (9) kotvícího prvku (1) a (2) je větší než jejich šířka, přičemž
alespoň jedno z ramen (3), (4), (8) a (9) je opatřeno
nejméně jedním hrotem (5), nebo systémem hrotů (5), kdy
zbývající z ramen (3), (4), (8) a (9), které je bez hrotů (5),
jsou opatřena nejméně jedním otvorem (7) nebo systémem
otvorů (7)
Patent CZ-107698-A3 (CZ)
Inventor: GUNTHER BERUD ING
IPC: E04H6/18
Filed: 1998-04-09
Abstract: Zařízení pro přemisťování palet sestává z
pevné rámové konstrukce /1/, která Je
opatřena třecími koly /3/ s pohonnou jednotkou
/11/ pro podélný posuv a dále svisle posuvným
rámem /4/, který pomocí dvou nakloněných
rovin /8/ a pohonné jednotky /7/
zvedne paletu /2/, na které je zaparkováno
vozidlo nad úroveň třecích kol /3/ a umožní
Její přemístění pomocí třecích kol /5/ a
pohonné jednotky /6/ v příčném směru.
Patent CZ-150599-A3 (CZ)
Inventor: PINGEL ALEXANDRINE
IPC: A23G3/00
Filed: 1997-10-30
Abstract: Tuhá potravinářská směs, kterou tvoří náplň alespoň částečně
pokrytá ochrannou vrstvou, kde náplníje nakypřená emulze typu
olej ve vodějejímž základemje fermentovaný nebo
nefermentovanýmléčný produkt ajeden nebo několik rostlinných
tuků, a že tato náplň obsahujejak) emulgátorjedennebo několik
esterůmastné kyseliny a cukiy, míra zvětšení objenu náplně po
nakypřeníje více než 30 objemových %a obsahuje 60 až 85
hmotnostních%sušiny. Způsob spočívá ve vytvoření emulze oleje
__ ve vodě, kypření, chlazení a opatření náplně ochrannou vrstvou.
Patent CZ-201972-A3 (CZ)
Inventor: PRÁŠILOVÁ HELENA
IPC: G09B29/10
Filed: 2019-02-11
Abstract: Pomůcka pro výuku čtení výškopisu v mapách sestává ze dvou map. Jedna mapa je 2D mapa určitého prostoru, měřítka a kartografického obsahu s výškopisem, která slouží jako podkladová. Druhá mapa je zdánlivě 3D lentikulární mapa téhož prostoru, téhož kartografického obsahu a téhož měřítka s týmž výškopisem, která je umístěna na 2D mapě a je rozřezaná na dílky, které studující rozhodí a následně složí na 2D podkladovou mapu tak, že 3D dílky jsou pokládány na to místo 2D mapy, které jim obsahově odpovídají.
Patent CZ-219295-A3 (CZ)
Inventor: KIJONKA MILOS ING
IPC: B25F1/04
Filed: 1995-08-28
Abstract: Dvoudílné pohyblivé svírací čelisti (S) vrtáku
jsou opatřena zuby a umožňují po úběru materiálu
v mezikruhové ploše sevření a vytažení
~~_..yáicQýgiíQ-jádra/ Čélišťi~(S)“jsbu
svírány pomocí šroubového a pákového mechanismu
otáčením utahovací rukojeti (U) s
maticí
Patent CZ-229899-A3 (CZ)
Title: 1. arylpyrazoles and their salts, process of their preparation, pesticidal agents in which those compounds are comprised as active substance and method of fighting pest
Inventor: PHILLIPS JENNIFER
IPC: C07D231/44
Filed: 1997-12-18
Abstract: The invention relates to 1-phenylpyrazole derivatives of formula (I), wherein R<1>, R<2>, R<3>, R<4> and X are as defined in the description, and to their use as insecticides.
Patent CZ-282295-A3 (CZ)
Inventor: FICZA MARTIN
IPC: A61F13/62
Filed: 1994-03-03
Abstract: Plenkové kalhotky se skládají z kalhotkového dílu (1) a jedné jednostranné na něj připevněné vložky (2), přičemž kalhotkový díl (1) je oboustranně nabrán v oblasti nohou pevnými staženými okraji (3) a k uzavření se používají suché zipy (4,4’, 5a, 5b). Přizpůsobením výšky plenkových kalhotek se dosáhne svinutím horního okraje zadního dílu a přizpůsobení plenkových kalhotek obvodu břicha se dosáhne suchým zipem (4,4’, 5a, 5b).
Patent CZ-304894-A3 (CZ)
Title: Fixing element with thread
Inventor: HAERLE ANTON PROF DR
IPC: B23G5/00
Filed: 1994-12-05
Abstract: Threaded fastening element with thread profile, for optimising tensioning, for internally threaded and, in particular, externally threaded configurations, in the case of which the thread-profile curve is characterised by a multiplicity of different curvatures which merge one into the other preferably continuously, i.e. without any abrupt changes. At the thread base, tangents (15/18) to the thread-profile curve run initially in a more or less axis-parallel manner in order to reduce the tensioning caused by the notching effect. With increasing distance from the lowermost point of the thread base, the curvature of the thread-profile curve then increases at the transition to the thread flank, until it opens into the thread-flank portion remote from the base of the thread. The thread-profile curve with different curvatures can be described by one or more segments of a conic section, e.g. an ellipse or one or more curves of the second or higher order. In the case of positively locking and self-tapping screws, those portions of the thread profile which are remote from the thread base are also preferably curved. <IMAGE>
Patent CZ-9904155-A3 (CZ)
Inventor: HILL SIMON DAVID JULIAN
IPC: A47K10/24
Filed: 1998-05-18
Abstract: Vlhké kapesníčky (1) mající podklad a kapalnou směs pro
utírání povrchů v domácnosti, průmyslu a lidského těla tvoří
první soubor (40) kapesníčků (1) a druhý soubor (50)
kapesníčků (1), kde každý kapesníček (1) má dva přehyby,
přičemž na kapesníčků (1) prvního souboru (40)je vytvořen
přehyb (44x) prvního panelu a přehyb (45x) druhého panelu, a
na kapesníčků (1) druhého souboru (50)je vytvořen přehyb
(54x) prvního panelu a přehyb (55x) druhého panelu tak, že
kapesníčky (1) prvního a druhého souboru (40, 50)jsou
složeny, vzájemně proloženy jeden s druhým a nastehovány
tak, že spotřebitel může každý kapesníček (1) snadno oddělit
od stohu (23) vlhkých kapesníčků (1).
Patent ES-197324-A3 (ES)
Title: Un vibrador electrico que actua de medio impulsor para hacer funcionar maquinas de afeitar en seco
Filed: 1951-03-30
Abstract: Un vibrador eléctrico que actua de medio impulsor para hacer funcionar máquinas de afeitar en seco caracterizado por el hecho de que en virtud de la alternancia de polaridad que se produce entre los dos brazos de una armadura magnética inducida por el flujo de una bobina atravesada por la corriente normal del circuito de alimentación se produce la atracción y repulsión alternativa de un núcleo unido al extremo de una palanca suspendida de un punto de giro lográndose imprimir a dicha palanca un movimiento pendular u oscilatorio de determinada amplitud el cual es aprovechado para impulsar directamente la cuchilla móvil de la máquina de afeitar mediante una corta lengüeta que sobresale de la citada palanca oscilatoria.
Patent SK-147298-A3 (SK)
Title: Method and installation for the electrolytic coating with a metal layer of the surface of a cylinder for the continuous casting of thin metal strips
Inventor: LAVELAINE HERVE
IPC: C25D1/04
Filed: 1997-06-06
Abstract: Both a process and plant are provided for electrolytically coating with a metal layer the casting surface of a roll for twin-roll or single-roll continuous casting of thin metal strip. The casting surface is at least partially immersed in an electrolyte solution containing a salt of the metal to be deposited, so as to face at least one anode. The surface is placed at a cathode and a relative movement is created between the casting surface and the electrolyte solution. Insulating masks are interposed between the anode or anodes and the arrises of the casting surface, the insulating masks preventing a concentration of the lines of current on the arrises and in their vicinity.
Patent SK-273487-A3 (SK)
Title: The travelling device for taking off or laying, as well as for transporting track panels
Inventor: THEURER JOSEF
IPC: E01B29/02
Filed: 1987-04-16
Abstract: A mobile apparatus for loading, transporting and laying an assembled track section comprises a self-propelled main vehicle comprising an elongated carrier frame, a pair of transversely aligned flanged wheels at each end thereof for engagement with, and support on, the rails of the assembled track section, a pair of lifting jacks at each carrier frame end associated with the flanged wheels, and a device for gripping the track section rails associated with each flanged wheel and associated lifting jack, the lifting jack being placeable on the track bed and operable to lift the carrier frame and flanged wheels with the assembled track section gripped by the rail gripping devices off the track bed, and an auxiliary self-propelled vehicle movable independently of the main vehicle and comprising a flatbed frame capable of receiving and supporting the carrier frame and flanged wheels of the main vehicle with the assembled track section gripped by the rail gripping devices, a track-bound undercarriage with flanged wheels and another, off-track undercarriage at each end of the flatbed frame, at least one of the undercarriages at each frame end being retractable, and an independent drive for each one of the undercarriages.
Patent SK-396592-A3 (SK)
Title: Cleaning method of exhaust gases and device executing this method
Inventor: FLECK CARL MARIA DR
IPC: B03C3/36
Filed: 1991-07-01
Abstract: PCT No. PCT/AT91/00080 Sec. 371 Date Dec. 29, 1992 Sec. 102(e) Date Dec. 29, 1992 PCT Filed Jul. 1, 1991 PCT Pub. No. WO92/00442 PCT Pub. Date Jan. 9, 1992.A device and process for cleaning exhaust gases, in particular those from diesel engines, in which the exhaust gases are taken through a channel (36a) of a ceramic body (36) where an electric field is generated substantially transversely to the direction of flow, whereby the soot particles deposited on the walls of the channel (36a) are oxidized by free ions or ions adhering to oxygen.
Patent SK-728388-A3 (SK)
Title: Graft lyotropic liquid crystalline composition
Inventor: PINTER JANOS
IPC: C09K19/52
Filed: 1988-11-04
Abstract: The invention relates to a graft lyotropic liquid crystalline composition having a viscosity less than 10 Pa.s comprising a relative low amount of surfactant(s), optionally co-surfactant(s), and/or solvents, optionally a polymer being in relative stretched state and is partly or totally penetrable by the medium and a solid material having a surface free energy of 18 to 240 mN/m.
Patent AT-509539-A3 (AT)
Title: Anbringvorrichtung für ein möbelteil und möbel
IPC: A47B88/04
Filed: 2011-02-22
Abstract: Die Erfindung betrifft ein Möbel und eine Vorrichtung zur lösbaren Anbringung eines Möbelteils an einer Führungseinheit (1), über welche das Möbelteil an einem Möbelkorpus verschiebbar aufgenommen ist, und die Führungseinheit (1) eine dem Möbelkorpus zugeordnete Korpusschiene (2) und eine dem Möbelteil zugeordnete Bewegungsschiene (3) umfasst, wobei Anbringmittel vorhanden sind, welche ein an der Führungseinheit (1) anbringbares Anbauteil (5) umfassen, das aus einem an der Führungseinheit (1) angebrachten Vormontagezustand in einen Endmontagezustand verstellbar ist, in welchem das Möbelteil über die Anbringmittel an der Führungseinheit (1) bestimmungsgemäß anbringbar ist. Erfindungsgemäß ist ein Kontaktabschnitt (9) am Anbauteil (5) ausgebildet, der bei an der Führungseinheit (1) im Vormontagezustand vorhandenem Anbauteil (5) auf einen Gegenabschnitt an der Führungseinheit (1) und/oder an dem Möbelkorpus derart abgestimmt ist, dass bei einer nutzungsgemäßen Bewegung der Bewegungsschiene (3) der Kontaktabschnitt (9) und der Gegenabschnitt relativ zueinander bewegbar sind und dabei miteinander in Kontakt gelangen, so dass die Verstellung des Anbauteils (5) aus dem Vormontagezustand in den Endmontagezustand erfolgt.
Patent BE-1003978-A3 (BE)
Title: Inrichting voor het presenteren van inslagdraden bij weefmachines.
IPC: D03D47/38
Filed: 1989-05-18
Granted: 1992-07-28
Abstract: Inrichting voor het presteren van inslagdraden bij weefmachines, daardoor gekenmerkt dat zij hoofdzakelijk bestaat in de kombinatie van een aantal heen en weer verplaatsbare draadpresentatie-elementen (2); per draadpresenttie-element (2) een excentriek (6) dat door zijn rotatie in de heen en weer gaande verplaatsing (A) van het erbij horende draadpresentatie-element (2) kan voorzien;roterende aandrijfmiddelen (7); koppelmiddelen (8), bestaande uit wrijvingskoppelingen, om de excentrieken (6) met de roterende aandrijfmiddelen (7) te koppelen; en stuurmiddelen (9) die de koppelmiddelen (8) te bevelen.
Patent BE-1009255-A3 (BE)
IPC: C08G63/84
Filed: 1995-04-07
Granted: 1997-01-07
Abstract: A new improved process for the continuous polymerisation of molten epsilon -caprolactone in an extruder, with the inclusion of an aluminium alkoxide as a polymerisation initiator. The aluminium alkoxide is selected from a trialkoxide of Al in which one alkoxy comprises (apart from the O atom of the Al-O bond) at least one supplementary O atom.