baber/WOPTO huggingface dataset:
Patent WO-2004054172-A1 (WO)
Title: Procede de protection de donnees pour fournisseur de donnees
Inventor: DUAN XIAOQIN
IPC: H04L29/06
Filed: 2003-10-17
Abstract: L'invention concerne un procédé de protection de données pour fournisseur de données, lié au domaine de la sécurité des données, qui comporte un serveur de gestion de données servant à gérer les mots de code de demandeurs. Le serveur de gestion de données distribue un mot de code à chaque demandeur accrédité par le fournisseur de données ; met en oeuvre une validation d'identité selon le mot de code fourni par le demandeur ; peut fermer la session et modifier le mot de code du demandeur selon les indications fournies par le fournisseur de données. Pendant l'accréditation, seul le fournisseur de données accrédite le demandeur au serveur de gestion de données, la distribution du mot de code étant assurée par le serveur de gestion de données, ce qui permet d'éviter au fournisseur de données de le faire et d'améliorer ainsi le procédé d'accréditation. Pendant la validation, le serveur de gestion de données vérifie et valide le mot de code du demandeur lorsque ce dernier envoie une demande d'accès au fournisseur de données, afin de faciliter l'accès du demandeur au fournisseur de données.
Patent WO-9725949-A1 (WO)
Title: Dispositif d'autotherapie par compresse chaude
Inventor: XIAO FUYUAN
IPC: A61F7/00
Filed: 1996-01-15
Abstract: L'invention concerne un dispositif d'autothérapie par compresse chaude, qui se présente sous la forme d'un boîtier de commande et d'une tête tenant lieu de compresse chaude, reliés par un fil thermostable. Lorsque le dispositif est en marche et que la température souhaitée est déterminée, le courant parvient jusqu'au corps électrothermique de la tête via un système de réglage et un relais de commande de température placés dans le boîtier de commande. En outre, un capteur de température situé dans une rainure centrale de la tête transmet en temps réel les signaux de température au système de réglage, si bien que le relais de commande peut être coupé automatiquement, ce qui permet de maintenir constante la température voulue dans la gamme de réglage (±1 °C) au niveau de la tête de compresse chaude, par intermittence d'arrêt et de marche. En cas de panne à l'échelon du système de commande de température, un relais de dépassement de température est désactivé et une alarme fonctionne pour assurer la sécurité d'utilisation.
Patent WO-02070364-A1 (WO)
Title: Dispositif de fermeture pour boissons gazeuses dote d'un organe d'evacuation et de restauration de la pression
Inventor: DVORACEK JAROSLAV
IPC: B65D51/16
Filed: 2002-03-04
Abstract: L'invention concerne un dispositif de fermeture multifonctionnel de bouteilles et de récipients, ce dispositif comportant un couvercle (1) pourvu d'une partie de fixation (2) formée par un coinceur de fermeture ou orifice ourlé (3) ou par une tête de bouchon pourvue d'une cage grillagée. Le dispositif est pourvu d'une partie d'écoulement (13) séparée de l'intérieur de la bouteille par un couvercle à pression (10). Ladite partie d'écoulement (13) est constituée par un ensemble de trous (12) formés par de petites ouvertures (14), traversant du côté interne (16) du couvercle (1) jusqu'à son côté externe (17), ces trous étant avantageusement recouverts par un recouvrement (19) de protection contre la rouille. Un dispositif de pression (36) est conçu pour exercer une pression sélective sur le couvercle à pression (10) lorsqu'on tire sur ce dispositif.
Patent WO-0047292-A1 (WO)
Title: Speer
Inventor: HILMER-GABCKE UTE
IPC: A63B65/02
Filed: 2000-01-25
Abstract: Speer, insbesondere zur Verwendung in einer Halle, im wesentlichen bestehend aus einem Schaft (2), dessen Speerspitze (3) stumpf ausgebildet ist und der in der Nähe seines Schwerpunktes einen Handgriff (4) aufweist, wobei der Schaft (2) als Kern (6) ausgebildet ist, der von einem Mantel (7) aus einem elastischen Material ummantelt ist.
Patent WO-0144928-A1 (WO)
Inventor: AUE AXEL
IPC: G06F9/30
Filed: 2000-10-26
Abstract: The invention relates to a register arrangement, for a microcomputer, with a register (1), which comprises at least one register bit (R1 to Rn) and further storage media, dedicated to the register (1) and in which the data content of the register (1) may be temporarily stored. According to the invention, in order to reduce the processing time for recovery of the data content of the register (1) and to keep the silicon area necessary for the register arrangement to a minimum, the further storage media should be arranged as at least one shift register (2), with at least two shift register cells (S1 to Sm), whereby the content of any shift register cell (S1 to Sm) may be transferred to a register bit (R1 to Rn) and, vice versa, the content of a register bit (R1 to Rn) may be transferred to any shift register cell (S1 to Sm).
Patent WO-0143471-A1 (WO)
Title: Verfahren zur verschlüsselung von daten und telekommunikationsendgerät und zugangsberechtigungskarte
Inventor: HANS MARTIN
IPC: H04L9/14
Filed: 2000-12-01
Abstract: Es werden ein Verfahren zur Verschlüsselung von Daten, ein Telekommunikationsendgerät (5) und eine Zugangsberechtigungskarte (100) vorgeschlagen, die eine Nutzung von Diensten eines oder mehrerer Diensteanbieter unabhängig von einem Netzbetreiber oder Hersteller des Telekommunikationsendgerätes (5) ermöglichen. Dabei werden die verschlüsselten Daten zwischen einem Diensteanbieter (1) und dem Telekommunikationsendgerät (5) über ein Telekommunikationsnetz (10) übertragen. Die über das Telekommunikationsnetz (10) zu übertragenden Daten werden in Abhängigkeit des gewählten Diensteanbieters verschlüsselt.
Patent WO-0189175-A1 (WO)
Inventor: VOLLMER VASCO
IPC: H04L12/64
Filed: 2001-03-30
Abstract: The invention relates to a method for controlling access to devices in a vehicle communication network(1). Said method is used to regulate access by an application (4) to the device (5) required for the application. Priorities are granted for said access. The drive needed for operating and controlling the individual devices is made available to the application by a driver manager (3). A resource manager (2) assigns the device to a requesting application in line with priority and availability.
Patent WO-0196165-A1 (WO)
Inventor: BAIER TORSTEN
IPC: B61L23/34
Filed: 2001-06-12
Abstract: L'invention concerne un dispositif de commande (20) pour un véhicule sur rails (10), comportant au moins deux antennes (25, 30). La première antenne (25), conçue pour recevoir des signaux radio d'un véhicule sur rails roulant en tête (15), du point de vue du sens de la trajectoire, est agencée à l'avant du véhicule sur rails (10) et l'autre antenne (30), conçue pour envoyer des signaux radio à un véhicule sur rails roulant derrière, est agencée à l'arrière du véhicule sur rails. Ladite invention a pour objectif d'améliorer davantage une transmission de signaux radio entre des véhicules sur rails roulant les uns derrière les autres. A cet effet, ces deux antennes sont des antennes directives (25, 30), le lobe principal d'émission (35) de la première antenne directive (25) étant dirigé dans le sens de la trajectoire et le lobe principal d'émission (40) de l'autre antenne directive (30) dans le sens opposé.
Patent WO-02087935-A1 (WO)
Title: Wischblatt zum reinigen von scheiben, insbesondere von kraftfahrzeugen
Inventor: KRAEMER GODELIEVE
IPC: B60S1/38
Filed: 2002-04-11
Abstract: Es wird ein Wischblatt vorgeschlagen, dass zum Reinigen von Scheiben, insbesondere von Kraftfahrzeugen dient. Das Wischblatt (10), hat ein bandartig langgestrecktes federelastisches Tragelement (12), an dessen der Scheibe (14) zugewandten unteren Bandfläche (22) eine an der Scheibe anlegbare, langgestreckte, gummielastische Wischleiste (24) längsachsenparallel angeordnet ist und an deren oberen Bandfläche (16) sich eine in Längsrichtung des Tragelements erstreckende, mit einer der Fahrtwind-Hauptströmungsrichtung (Pfeil 52) zugewandte Anströmflache (54) versehene aus einem elastischen Material bestehende Windabweisleiste (42) befindet. Ein besonders vorteilhaftes und kostengünstig herzustellendes Wischblatt ergibt sich, wenn die Windabweisleiste im Querschnitt gesehen zwei von einer gemeinsamen Basis (46) ausdivergierende, an dieser miteinander verbundenen Schenkel (48, 50) hat, deren freieder Sc heibe (14) zugewandten Enden sich am Wischblatt abstützen, und wenn weiter an der Augenseite des einen Schenkels (50) die Anströmfläche (54) ausgebildet ist und das Profil des Querschnitts der Windabweisleiste (42) über deren gesamte Länge gleich ist.
Patent WO-03004856-A1 (WO)
Inventor: BOECKING FRIEDRICH
IPC: F02M45/08
Filed: 2002-06-19
Abstract: The invention relates to a fuel injector for injecting fuel into the combustion chamber of an internal combustion engine. A multi-way valve (18) is accommodated inside the injector body (2) and comprises a valve body (20) enclosed by a valve space (19). A control space (3) is subjected to the action of pressure or relieved from pressure when the multi-way valve (18) inside the injector body (2) is actuated, whereby the control space (3) is pressurized via at least one inlet throttling element (15) and is relieved from pressure via at least one discharge throttling element (16). Another discharge throttling element (25) is connected down from the valve space (19) of the multi-way valve (18) on the discharge side, whereby the valve space (19) and the control space (3) are connected to one another via a main flow channel (8) and an auxiliary flow channel (11).
Patent WO-03072101-A1 (WO)
Inventor: SUSILO RUDY
IPC: A61K31/425
Filed: 2003-02-24
Abstract: The invention relates to the compounds (2R,4R), (2S,4R)-2-methylthiazolidine-2,4-dicarboxylic acid and (2RS,4R)-2-methylthiazolidine-2,4-dicarboxylic acid and salts of said compounds, the use thereof for the prophylaxis and/or treatment of neurodegenerative diseases, methods for the prophylaxis and/or treatment of neurodegenerative diseases, and pharmaceutical compositions containing said compounds together with physiologically compatible carriers, auxiliary agents, and/or solvents.
Patent WO-2004020847-A1 (WO)
Title: Lagerschale für ein kugelgelenk und verfahren zu deren herstellung
Inventor: BUDDE FRANK
IPC: F16C11/06
Filed: 2003-07-17
Abstract: Es wird eine Lagerschale (5, 14) mit einer sphärischen Lagerfläche für ein Kugelgelenk vorzugsweise zum Einsatz in Fahrwerksaufhängungen oder Lenkungen von Kraftfahrzeugen, welches im Wesentlichen ein Gelenkgehäuse und einen aus einer Kugelfläche und einem Zapfenteil bestehenden Lagerzapfen, welcher mit der Kugelfläche dreh- und auslenkbar in der sphärischen Lagerfläche der im Gelenkgehäuse festgelegten Lagerschale gelagert ist, aufweist, vorgestellt bei dem erfindungsgemäss in den thermoplastischen Kunststoff der Lagerschale (5, 11, 12, 13, 14, 15) zumindest in einem Teilbereich ein Endlosfasergewebe eingebettet ist. Darüberhinaus betrifft die Erfindung ein Verfahren zur Herstellung einer o. beschriebenen Lagerschale aus thermoplastischem Kunststoff, bei dem aus einem plattenförmigen Thermoplastkunststoffhalbzeug, in welches ein Endlosfasergewebe eingebettet worden ist, ein im Wesentlichen mit kreisförmiger Aussenkontur versehenes Lagerschalenrohteil (1, 9) mechanisch herausgearbeitet wird und bei dem in einem anschliessenden Bearbeitungsgang durch Erwärmung des Thermoplastkunststoffmateriales über dessen Schmelztemperatur und anschliessende mechanische Umformung des Lagerschalenrohteiles (1, 9) die Endgestalt der Lagerschale (5, 11, 12, 13, 14, 15) mit sphärischer Lagerfläche herbeigeführt wird.
Patent WO-2004053475-A1 (WO)
Title: Schaltungsanordnung zum betreiben eines gassensors
Inventor: SCHNAIBEL EBERHARD
IPC: G01N27/417
Filed: 2003-09-24
Abstract: Es wird eine Schaltungsanordnung zum Betreiben eines Gassensors (10) vorgeschlagen, der einen Referenzgasraum (18) enthält, in dem eine Elektrode (19) angeordnet ist, der ein Referenzgaspumpstrom (35) zur Aufrechterhaltung der Konzentration des Referenzgases zugeführt wird. Eine Diagnoseanordnung (39, 43, 44) ermittelt eine Konzentrationsänderung des Referenzgases durch eine Änderung des Referenzpumpstroms (35) und eine zeitbezogene Bewertung des Sensorsignals (38) des Gassensors (10).
Patent WO-2004069612-A1 (WO)
Title: Vorrichtung und verfahren zur ansteuerung eines gasgenerators zum aufblasen eines airbags
Inventor: ROELLEKE MICHAEL
IPC: B60R21/26
Filed: 2003-10-23
Abstract: Es wird ein Verfahren und eine Vorrichtung zum Ansteuern eines kontinuierlichen Gasgenerators vorgeschlagen, wobei der Gasgenerator in Abhängigkeit von einer Verknüpfung von Crash-Merkmalen angesteuert wird. Dabei wird insbesondere eine variable Schwelle in Abhängigkeit von einer Crash-Schwere und Insassenmerkmalen gebildet, wobei ein Geschwindigkeitsabbau mit dieser Crashschwelle nach Bildung der Auslöseentscheidung verglichen wird. Dieser Vergleich bestimmt die Ansteuerung des kontinuierlichen Gasgenerators.
Patent DE-1907431-A1 (DE)
Title: Electrically or mechanically controlled - thread-feeding device for weaving machines
Inventor: MEYER KARL
IPC: D03D47/00
Filed: 1969-02-14
Abstract: Electrically or mechanically controlled thread-feeding device for weaving machines or drag shuttles Thread-feed control system in which thread release is effected in each case for one colour of several colours and the thread feed in the loop thread conductor is conducted solely by one control element. In the first case this is performed by a control piston operated by compressed air, and in the second case by a mechanically driven camshaft.
Patent DE-1907528-A1 (DE)
Title: Separation of pure nitrogen and oxygen - from air ( by liquefaction)
Inventor: M BASIN GENRICH
IPC: F25J3/04
Filed: 1969-02-14
Abstract: Medium or high pressure liquefaction are followed by rectification, and the products cool the air; one of these products, the oxygen, is compressed before being used for cooling. Part of the compressed air is cooled by the N2, the other by the compressed O2 and the Ar fraction; they are then mixed, expanded and fed to rectification.
Patent DE-1921139-A1 (DE)
Title: Pre-moulding compositions of high solubility based on
Inventor: CONRAD DIPL-CHEM ALEXANDER
IPC: C08L63/06
Filed: 1969-04-25
Abstract: The soly. of adducts of triglycidyl isocyanurate with aliphatic, aromatic or hydroaromatic carbonic acids or anhydrides, or with aromatic amines or amino compds. is increased by heating the reaction mixt. for 1-5 hr. in an inert solvent such as cyclohexanone which boils at above 80 deg.C, until the reaction is 40-80%, preferably 65% complete. Epoxide mouldings compns. are obtained by adding fillers, flexibilising agents, and animal, vegetable or synthetic fatty acids. The product has a soly. of 30-70% good storage properties and is specially suitable for impregnating, soaking, coating or forming laminates with paper, org. textiles or inorg. materials. Moulding powders may be formed by mixing with glass fibre, or with stone or wood flour.
Patent DE-1926130-A1 (DE)
Title: Emulsifying agents for dry cleaning fluids - based on water-in-trichlorotrifluoroethane
Inventor: IKESHITA OSAMU
IPC: C11D1/22
Filed: 1969-05-22
Abstract: Emulsifiers for cleaning fluids for use on machines and clothes consist of a mixture of 20 to 80% by wt. of (1) methylamine- (2) ethylamine ; (3) dimethylamine (4) morpholine- (5) monoethanolamine- (6) isopropanolamine-, (7) diethanolamine-, or (8) triethanolamine-salts of dodecylbenzene sulphonic acid, with 80 to 20% of (9) n-propylamine- (10) n-butylamine- (11) sec-butylamine-, (12) cyclohexylamine-, (13) 2-ethyl lexylamine-, (14) di-n-butylamine-, (15) di- isobutylamine-(16) dicyclohexylamine-, or (17) tributylamine- salts of dodecyl benzene sulphonic acid. Preferred mixtures are 5/11, 5/12, 5/15, 5/14, 1/11, 1/12, 1/13, 1/17, 7/11, 8(17, 6/11, 6/15, 3/11, 3/10, 3/13, 2/9, 2/12, 2/13, 2/14, 4/11, 4/12, 4/17, 1/9, 3/9, 3/9, 3/17, 4/14, and 5/17. Better emulsification of water in trichloro trifluoromethane is obtained than with the isopropylamine salt of dodecyl benzene sulphonic acid previously used as emulsifier.
Patent DE-1932198-A1 (DE)
Title: Promoting growth and fertility of animals - and plants
Inventor: FRANZ SCHWANITZ PROF DR
IPC: A23K20/26
Filed: 1969-06-25
Abstract: Composition comprises polyphosphates, polyphosphate esters, cerium nitrate or its other compounds, or a mixture. the active agent is administered at a daily dosage of about 0.02 g. per kg. of the body. This composition is highly effective and inexpensive.
Patent DE-1934026-A1 (DE)
Title: Bread or cake mould made of pastry
Inventor: WINKLER HELMUT
IPC: A21B3/13
Filed: 1969-07-04
Abstract: The mould, having a base and four sides, is formed in one piece from edible wafer or waffle pastry. It is cooked at the same time as the bread filling is baked.
Patent DE-1935599-A1 (DE)
Title: Feedstuff briquetting strand impregnated - with chemicals for longe life
Inventor: WERNER UNGER DR
IPC: A23K40/20
Filed: 1969-07-12
Abstract: Briquetted feedstuffs produced by twisting or stranding techniques are treated with chemicals to lengthen storage life with maintained nutritious value. These chemicals are sprayed, injected etc. in a press space at the entry end of the machine but which is not for the actual pressing operation despite its position between two twisting drums. In this way it is predominantly the inner part of the strand which is impregnated. The amount of chemical applied should depend on the material height at the press entry. The chemicals have a bacteriostatic or fungistatic purpose.
Patent DE-1962698-A1 (DE)
Title: Powdered plastics electrostatic spray booth
Inventor: WEHRHEIM WERNER DIPL-ING
IPC: B05B14/43
Filed: 1969-12-13
Abstract: Air flows horizontally through the booth the same way as the plastics powder, and a stepped floor surmounts an air distributor chamber supplied from the fan so that air rises from the floor to keep the powder moving and prevent it settling onto the floor surfaces. The end wall of the booth is a filter or has filters behind its passages so that powder can be filtered out to drop to a trap below and the air drawn back by the fan for re-cycling. The powder is sprayed off an upwards rotating belt forming part of the spray fittings at the front end of the booth.
Patent DE-2007985-A1 (DE)
Title: Winding machine yarn cutter
IPC: B65H54/71
Filed: 1970-02-20
Abstract: Device in which stationary yarn is cut and removed under vacuum suction comprises an activated blade with a cutting edge working in conjunction with the glat table of an anvil, in which the yarn in the rest position is between the blade and the anvil and in which the blade had on at least one side of the cutting edge a buffer cam with a flat impact surface working in conjunction with the impact cam of the anvil and in which the cutting edge and the impact surface run parallel with the impact surface of the anvil, whilst the cutting edge occupies part and the impact cam the remainder of the width of the blade.
Patent DE-2015039-A1 (DE)
Title: Coke oven gas circulating system
IPC: C10B27/02
Filed: 1970-03-28
Abstract: An oval section tube suspended from the charging hole open at the bottom, and with holes along it, collects gas from lower levels of the chamber and releases it into the space above the charge. A movable plug near the top of the tube is raised by a lifting member above the deck during charging, and lowered after charge levelling. Near the top of the tube is an opening through which the levelling bars can pass. Further vertical open ended tubes on the coke over door assit gas circulation.
Patent DE-2027971-A1 (DE)
Title: Water in oil emulsion as fuel for lime prodn - by burning lime-stone - dolomite etc
IPC: F27B1/00
Filed: 1970-06-06
Abstract: Water-in-oil emulsion is used as fuel for burning limestone in a shaft kiln pref. with impulse burner to give increased output and lime of improved quality. The emulsion consists of 70-97% residue oil, fuel oil or combustion oil esp. heavy oil, 30-3% H2O as reducing agent and pref. a carboxylic acid with 10-24C atoms or its alkali or alkaline earth metal salt as emulsifying agent.
Patent DE-2052690-A1 (DE)
Title: Solder for inorganic oxide articles - consisting of lead, tin zinc and antimony
IPC: B23K35/26
Filed: 1970-10-27
Abstract: Solder consists of 40-98% Pb, 1.8-50% Sn, 0.05-10% Zn, 0.05-10% Sb, 0-0.1% Al, 0-0.1% Si, 0-0.1% Ti and 0-0.1% Be. It enables inorganic oxide articles such as glass or ceramics to be directly soldered. The solder bonds firmly to inorganic oxides to give durable high strength bonds. Metal layers are not required.
Patent DE-2201780-A1 (DE)
Title: Gemstone heat treatment - pref in autoclave using steam as pressure medium
Inventor: SCHMIDT FRIEDRICH HERBERT
IPC: C30B29/26
Filed: 1972-01-14
Abstract: The gemstones are subjected to a heat treatment under an isostatical pressure to neutralise their internal stresses. The treatment prevents cracking of stones during the heat treatment for improving the colouring and fire.
Patent DE-2206220-A1 (DE)
Title: Magnetite coated articles - by plasma or flame spraying magnetite onto heated surface of article
Inventor: HORST JOHANNES MARTINUS ARNOLD
IPC: C23C4/11
Filed: 1972-02-10
Abstract: Magnetite is applied to the surface of a support material by contacting the surface with magnetite, or components converted into magnetite on being cooled, at a temp of at least 1538 degrees C, and cooling the surface so that firm bonding with the magnetite is obtained. Gives firmly bonded magnetic coatings on a wide range of supports, including metals, minerals, ceramics, carbides and synthetic resins. Short heating cycle.
Patent DE-2234438-A1 (DE)
Title: High-value org fertilizer prodn - from animal faeces and/or slaughterhouse waste
Inventor: BAUER OTTO
IPC: C05F1/00
Filed: 1972-07-13
Abstract: Faecal matter from large-scale animal-rearing and/or slaughterhouse waste is stored at is not 40 degrees C in a closed container before mixing and comminuting with an approximately equal amt. of a 90/10 mixt. of rottable clarification sludge (from a waste-water plant not connected to galvanization works) and waste paper (not contg. plastics) for ca 15-20 mins. in a mixing drum, sterilizing the resulting mass for ca 30-60 mins. at ca 95-100 degrees C, cooling to ca 45 degrees C, and fermenting out for 10-15 days with occasional stirring in a fermenter while continuously removing the gases formed. The end-product is odourless and pathogen-free.
Patent DE-2250129-A1 (DE)
Title: Silicon semi-conductor selective surface treatment - to render surface susceptible to reaction
Inventor: FRITZSCHE CHRISTIAN DIPL PHYS
IPC: H01L21/316
Filed: 1972-10-13
Abstract: The semi-conductors are selectively impregnated with reaction preventing ions at places where a gas or liquid generated surface layer is to be deposited on them. Inversely reaction promoting ions are impregnated where the surface layers to be produced are required to be thick. The impregnation is effected by ion implanting, and applying selective radiation to the surface concerned, the ion beams being controlled by electrical or magnetic means. The method simplifies semiconductor mfg. procedures by doing away with the need for masking layers, etc.
Patent DE-2264403-A1 (DE)
Title: Unsatd nitriles from olefines prepn - using mixed uranium tellurium, molybdenum oxide catalysts
Inventor: FATTORE VITTORIO DR
IPC: C07C45/35
Filed: 1972-01-25
Abstract: Catalysts for making unsatd. nitriles from olefins, NH3 and O2 or O2-contg. gases, or oxidation of olefins to O-contg. cpds. or dienes, consist of a mixture of O-contg. cpds. of U, Te and Mo, pref. the oxides, with or without an activator chosen from O-contg. cpds. of elements of gp. Ib, IIa, IIb, IIIa, IIIb, IVa, Va, Vb, VIb, VIIb and VIII corresp. to the formula: UaTebMocMedX in which Me is the activator element, pref. P, As, Sb or B, and X is O necessary to saturate the valencies of the other elements; a, b, c and d are the number of atoms of the different elements. If in the compsn., a = 1, then b is 1-8, pref. 2-5; c is 0.1-1, pref. 0.3-0.8 and d is 0-5, pref. 0-3. Used for making acrylonitrile and acrolein.