baber/WOPTO huggingface dataset:
Patent CR-20140390-A (CR)
Title: Método y aparato para controlar la atm´sfera en un espacio llenado con productos agrícolas u hortícolas.
Inventor: VELTMAN ROB HENK
IPC: F24F11/08
Filed: 2014-08-20
Abstract: La invención se refiere a un método para controlar la atmósfera en un espacio que se puede cerrar llenadocon productos agrícolas u hortícolas.
Patent CR-20150227-A (CR)
Title: Dispositivo portátil individual para la verificación de longitudes
Inventor: GONZÁLEZ AGÜERO MARÍA DE LOS ANGELES
IPC: G01C3/06
Filed: 2015-04-30
Abstract: El dispositivo portátil individual para la verificación de longitudes posee como función principal el dotar a los árbitros de futbol de una herramienta con la que se logre colocar la barrera de jugadores al cobrar una falta a la distancia de 9.15m, según se establece en los reglamentos; con una mayor precisión y confiabilidad.
Patent CR-20150445-A (CR)
Title: Vendaje de una herida
Inventor: ROBSON MARTIN C
IPC: A61F13/00
Filed: 2015-08-27
Abstract: La invención se relaciona con el vendaje de una herida para absorber exudado desde la herida sobre la cual se coloca el vendaje. El vendaje de la herida incluye un material de fibra porosa altamente absorbente y una carga superficial negativa en una superficie del vendaje.
Patent CR-20150520-A (CR)
Title: 4-amino-6-(heterocíclico)picolinatos y 6-amino-amino-2-(heterocíclico) pirimidin -4-carboxilatos y su uso como herbicidas
Inventor: ECKELBARGER JOSEPH D
IPC: C07D401/04
Filed: 2015-10-08
Abstract: Se proporcionan ácidos 4-amino-6-(heterocíclico)picolínicos, 6-amino-2-(heterocíclico)pirimidin-4-carboxilatos y derivados de estos. También se proporcionan composiciones herbicidas que incluyen estos compuestos, así como procedimientos de uso de estos como herbicidas.
Patent CR-20180219-A (CR)
Title: Sistema de generación electrica y movilidad
Inventor: ROJAS ARREDONDO JUAN CARLOS
IPC: F02C9/00
Filed: 2018-04-16
Abstract: Es un sistema de generación eléctrica, perteneciente al sector tecnológico de ingeniería mecánica, obtenido mediante el ordenamiento de elementos y unidades existentes en el mercado, funciona con aire estático, a partir del proceso de retro turbo succión de aire estático. En su primera fase, se da inicio con un motor de combustión por aproximadamente tres minutos, el cual hará rotar las fajas y dará el giro a los generadores con capacidad de generar ochocientos kilowatts hora cada uno, estos inician la generación enviando corriente AC al tablero principal desde donde se activara el arranque de los turbo sub propulsores. Iniciada la propulsión de aire con una presión ajustable con un Dimer según la necesidad de Kilowatts deseados, el motor de combustión se apagara y se liberara. El sistema se sostendrá por retro alimentación (circulo de producción eléctrica y consumo de los turbo propulsores que a su vez mandaran presión de aire a las turbinas de giro y sostendrán el circulo de producción, siendo este auto suficiente). La turbina de aceite al romper la fuerza centrífuga, por giro liberara hasta en un cincuenta por ciento la necesidad de presión de aire.
Patent CR-20180420-A (CR)
Title: Constructos de anticuerpo biespecíficos para bcma y cd3 que se ligan a células t
Inventor: BROZY JOHANNES;
IPC: C07K16/28
Filed: 2017-02-02
Abstract: La presente invención provee constructos de anticuerpo biespecíficos de una modalidad específica Fc caracterizados porque comprenden un primer dominio que se une a BCMA, un segundo dominio que se une a un epítope extracelular de la cadena CD3e de humano y/o de Macaca y un tercer dominio, el cual es la modalidad específica Fc. Más aún, la invención provee un polinucleótido, que codifica el constructo de anticuerpo, un vector que comprende este polinucleótido, células hospedadoras, que expresan el constructo y una composición farmacéutica que comprende el mismo
Patent CR-20190579-A (CR)
Title: Compuesto para obtener clarificante orgánico
Inventor: FERREIRA DANIEL FRANCISCO
IPC: C08G65/329
Filed: 2019-12-19
Abstract: Esta Patente de Invención trata de un compuesto para obtener una solución orgánica no iónica de bajo peso molecular, de origen esencialmente vegetal y que actúa como coagulante, floculante y auxiliar de clarificación en el tratamiento de aguas en general, jugo y jarabe de caña de azúcar, perteneciente al sector de azúcar y alcohol, con aplicación en el proceso de fabricación de azúcar orgánico y Estaciones de Tratamiento de Agua para aclaración. El compuesto para obtener un clarificador orgánico hecho de materia prima de extracto de planta de acacia negra líquido o en polvo comprende básicamente un vehículo a base de agua, un ingrediente activo a base de extracto de planta de acacia negra y un adyuvante a base de soda u opcionalmente un secuestrador a base de ácido cítrico.
Patent EC-SP003860-A (EC)
Title: Inhibidores no peptidicos de la union celular dependiente de vla-4 utiles en el tratamiento de enfermedades inflamatorias, autoinmunes y respiratorias
Inventor: DUPLANTIER ALLEN JACOB
IPC: A61K31/42
Filed: 2000-12-28
Abstract: Se describe un género de compuestos no pepetidicos, siendo los citados compuestos inhibidores de VLA-4 útiles en el tratamiento de enfermedades inflamatorias, autoinmunes y respiratorias y comprendiendo los citados compuestos un compuesto de fórmula (1.0.0) (gráfico), y sales y otros derivados profármacos de éste farmacéuticamente aceptables, en el que: A es alquilo (C1-C6), cicloalquilo, arilo, heteroarilo o heterociclilo opcionalmente sustituidos con 0 a 3 R9 o es un miembro seleccionado del grupo constituido por los siguientes radicales: A1 -NHC(=O)NH-A2-, A1-NHC(=O)=-A2-, A1-OC(=O)NH-A2, A1-NHSO2NH-A2, A1-NHC(=O)-A2-, A1-C(=0)NH-A2-, A1-NHSO2-A2-, A1-SO2NH-A2-, A1-(CH2)r-O-A2-, A1-O-(CH2)r-A2-, A1-(CH2)r-A2-, estando A1 y A2 cada uno seleccionado independientemente del grupo constituido por hidrógeno, arilo, alquilo (C1-C6), alquenilo (C2-C6), alquinilo (C2-C6), cicloalquilo, heteroarilo, y heterociclilo sustituido con 0 a 3 R9, B es un miembro selccionado independientemente del grupo constituidos por los siguientes: (gráfico), E es un enlace sencillo -O- NR10-, -CH=CH-, -C=C-, S(=0), -CR11R12NR10-, o -CR11R12-; X es -O-, -C(=O)-, -S(=O)q- o -NR10-; X1,X2 y X3 se seleccionan cada uno independientemente del grupo constituido por CH, CCR9 o N; y es un enlace sencillo, -C(=O)-, -C(=S)- o -S(=O)2-; -R7 es alquilo (C1-C6), (CH2)kOR5 (CH2)kNR6C(=O)R5, (CH2)xNR6C(=O)OR5, (CH2)kNR6SO2R5, (CH2)kNR6R5, F, CF3, OCF3, arilo sustituido con 0 a 3 R9, heterociclilo sustituido con 0 a 3 R9, heteroarilo sustituido con 0 a 3 R9 , cicloalquilo sustituido con 0 a 3 R9 o R7 puede tomarse conjuntamente con R8 para formar un anillo cicloalquilo o heterociclilo o R7 puede tomarse conjuntamente con R11 para formar un anillo ciccloalquilo o heterociclilo y R8 es hidrógeno F alquilo (C1-C6) o alcoxi (C1-C6).
Patent EC-SP013947-A (EC)
Inventor: LOOZEN HUBERT JAN JOZEF
IPC: A61K31/405
Filed: 2001-02-22
Abstract: Disclosed are novel, selective estrogens type having a steroid skeleton with a non-aromatic A-ring and a free or capped hydroxyl group at carbon atom No. 3. The estrogens satisfy general formula (I), in which R<1 >is H, (C1-C3)alkyl or (C2-C3)acyl; R<2 >is H, alpha-(C1-C4)alkyl, alpha-(C2-C4)alkenyl or alpha-(C2-C4)alkynyl; R<3 >is H or (C1-C4)alkyl, (C2-C4)alkenyl or (C2-C4)alkynyl, each at location 15 or 16 of the steroid skeleton; R<4 >is H or (C1-C5)alkyl, (C2-C5)alkenyl or (C2-C5)alkynyl, each optionally substituted with halogen; preferred is ethynyl; R<5 >is H, (C1-C3)alkyl or (C2-C3)acyl; R<6 >is (C1-C5)alkyl, (C2-C5)alkenyl, (C2-C5)alkynyl or (C1-C5)alkylidene, each optionally substituted.
Patent EC-SP034721-A (EC)
Title: Pirido-pirimidinas 6-sustituidas
Inventor: CHEN JIAN JEFFREY
IPC: A61P/
Filed: 2003-08-11
Abstract: La presente invención se refiere a compuestos nuevos de fórmula (I), para un proceso para su elaboración, para composiciones farmacéuticas que las contienen, y su uso en terapia, en particular su uso en la profilaxis y tratamiento de enfermedades respiratorias.
Patent EC-SP056195-A (EC)
Title: Derivados de n-alquinil-2(ariloxi-sustituido)alquiltioamida como fungicidas
Inventor: CROWLEY PATRICK JEFF
IPC: C07D277/82
Filed: 2005-11-30
Abstract: La presente invención se refiere a compuestos fungicidas de la fórmula general (I) en la cual Ar es un grupo de fórmula (A), (B1), (B2) o (C), o Ar es un grupo unido a la posición 5 o 6 de fórmula (D1) o (D2); y R1, R2, R3, R4, R5, n, A1, A2, A3, A4, A5, Ka, Kb, L, M, V, W, X, Y y Z tienen las definiciones dadas en la reivindicación 1.
Patent EC-SP077206-A (EC)
Title: Sistema de comunicación electromagnético y óptico combinado
Inventor: LUBOW ALLEN
IPC: G06K19/077
Filed: 2007-01-25
Abstract: Se provee un sistema de comunicación que incluye tanto un dispositivo electromagnético ("EM") de comunicación como un dispositivo óptico de comunicación, que incluye por lo menos un símbolo que puede ser leído por una máquina; donde por lo menos una porción del dispositivo EM de comunicación y por lo menos una porción del símbolo que puede ser leído por una máquina están formadas del mismo material. Este material puede ser, por ejemplo, una tinta conductora o una hoja metálica conductora. Si se desea, el dispositivo EM de comunicación puede incluir una antena, donde por lo menos una porción de la antena incluye por lo menos una porción del símbolo que puede ser leído por una máquina.
Patent EC-SP951462-A (EC)
Title: SINTESIS DE 3- [4--(2- AMINO-ETOXI)BENZOIL] -2- ARIL-8-HIDROXIBENZO [b] TIOFENOS (CASO X- 9295A)
Inventor: LABELL SMITH ELIZABETH
IPC: A61K9/00
Filed: 1995-06-07
Abstract: El invento se refiere a una nueva forma cristalina no solvatada de clorhidrato de 6-hidroxi-2-(4-hidroxifenil)-3-[4-(2-piperidinoetoxi)benzoil]benzo [b] tiofeno.
Patent EC-SP951499-A (EC)
Title: Compuestos ariltios
Inventor: DOMAGALA JOHN MICHAEL
IPC: A61K31/79
Filed: 1995-08-04
Abstract: Los agentes antibacteriales y antivirales ariltiol y ditiobisarilamida tienen la siguiente fórmula general: Donde A es una arilo monocíclico o bicíclico que puede contener hasta 3 heteroátomos seleccionados de O, S, y N, R1 y R2 son grupos sustituyentes, X es: cuando n es 1, un enlace simple cuando n es 2; R4 y Z pueden ser hidrógeno o alquilo. Los compuestos son útiles para el tratamiento de las infecciones bacterianas y las infecciones virales.
Patent FI-20125762-A (FI)
Inventor: ARPONEN VILLE-KALLE
IPC: A63F9/24
Filed: 2012-06-29
Abstract: An improved computer implemented process for providing an interactive game event for two or more users. A game event is configured to comprise one or more independently progressing sub-processes (SP1 -SP6) into which groups of game characters (C1 -C3) are selected. Selected game characters (C1 -C3) are provided with a set of allowed interaction functions for activation in the sub-process (SP1 -SP6). The state of the sub-process (SP1 -SP6) is changed in response to a game character (C1 -C3) activating an interaction function from the set of allowed interaction functions, and the set of allowed interaction functions of the game characters (C1 -C3) is updated in response to state change of the sub-process (SP1 -SP6).
Patent FI-20166017-A (FI)
Title: An apparatus, a method and a computer program for video coding and decoding
Inventor: HANNUKSELA MISKA
IPC: H04N21/4402
Filed: 2016-12-22
Abstract: A method comprising: requesting, by a client, an independently coded first representation of a video content component from a server; receiving a bitstream and playing a first set of data units of the independently coded first representation; and requesting a second set of data units of a second representation, said second set of data units being dependently coded on one or more requested or buffered data units of the first set, said second set of data units being temporally partitioned into two parts where a base part is decodable without an enhancement part and an enhancement part may not be decodable without the base part.
Patent GB-1028189-A (GB)
Abstract: 1,028,189. Suppressing currents in cable sheaths. COMPAGNIE GENERALE D'ELECTRICITE. Aug. 19, 1963 [Aug. 22, 1962], No. 32792/63. Heading H2H. In a known arrangement of connecting singlephase cable sheaths to earth, or in multiphase systems to other cable sheaths in a crossbanded arrangement, through saturable inductors to limit induced voltages and currents, the inductors are shunted by non-linear resistors which increase their conductivity temporarily under transient conditions. In the Figure, one or both ends of the sheath are connected to earth or a neutral wire. In a 3-phase arrangement (Fig. 3, not shown), the sheaths are crossbanded and adjacent sheath terminations are connected through the parallel inductiveresistive arrangement Z.
Patent GB-1047192-A (GB)
IPC: F23G5/00
Abstract: 1,047,192. Combustion furnaces. VOLUND A.S. March 24, 1964 [March 29, 1963], No. 12394/64. Heading F4B. In the combustion of solid fuel in a furnace having a grate 3, and a firebox 2 with a flue 1 connected to a heat exchanger 9, e.g. a boiler, part of the combustion gas is recirculated after passing through the heat exchanger, and is injected into the firebox through ports 11 above the grate. The ports 11 lead from a channel 12 having a connection 13 to a fan 14 which draws the combustion gas from the flue 1 through the duct 15. The volume of recirculated combustion gas is regulated by a temperature feeler 17 connected to a controller 19 which can adjust either the speed of the fan 14 or the position of a damper in the duct 15. Combustion air is injected through the grate from below by means of a fan 8. The furnace may incorporate a rotary kiln, Fig. 3 (not shown), for the complete combustion of the fuel coming from the grate. The recirculated gas may be mixed with incoming air and introduced into a compartmented plenum chamber below the grate.
Patent GB-1050370-A (GB)
IPC: B24D15/04
Abstract: 1,050,370. Grinding. CORNING GLASS WORKS. Oct. 11, 1965 [Oct. 15, 1964], No. 43080/65. Heading B3D. A pad for finishing curvilinear surfaces of a frangible workpiece, such as a television screen W, comprises a body portion 11 of flexible material, an upper working surface 13 conformable to the contour of the workpiece, a plurality of fingers 15 extending outwardly from an undersurface of the body portion, means for connecting the body portion to a suitable support surface 22 so that the fingers co-operate with the contour of the support surface to conform the working surface to the general contour of the workpiece while permitting sectional deflection of the work surface to compensate for irregularities in the surface of the workpiece. As shown in Fig. 4, the support surface receives several pads 10 each of which has an offset portion 12 to one edge of its rectangular body portion, the offset portions having bars 17, Fig. 1 (not shown), moulded therein and having apertures 19 through which bolts pass to secure the pads to the support surface. The pads are of rubber or neoprene having a Shore A durometer hardness of between 50 to 90 and fingers 15 which taper towards the support surface and are spaced at ¢-inch to ¥-inch centres. The fingers 16 at the edges of the pads opposite the offset portions are short so that the pads overlie the offset portions to present a substantially continuous surface. A reinforcing fabric, such as duck fabric, may be embedded within the material of the pads. For polishing, felt surfaces may be vulcanized to the body portions. The workpiece may be mounted on a holder 23 rotated about a shaft 24, and the support 20 for the pads moved across the rotating workpiece on rollers 21. Passages are formed between abutting pads to assist the removal of slurry.
Patent GB-1052552-A (GB)
IPC: A01N25/22
Abstract: 1,052,552. Stabilised insecticidal compositions. SANDOZ PATENTS Ltd. April 6, 1964 [May 13, 1963], No. 14064/64. Heading A5E. A stabilized insecticidal composition comprises an organic phosphate toxicant, a solid carrier therefor having a tendency to decompose said phosphate, and as a protective agent on said carrier glycol monethyl ether or glycol monoethyl thioether. The carrier may be Attaclay, pumice, vermiculite, bentonite, diatomaceous earth, talcum, kaolin or a mixture of two or more of said minerals. The composition is preferably in the form of a granulate. The composition may additionally contain a surface active agent.
Patent GB-1052865-A (GB)
IPC: E04B1/86
Abstract: 1,052,865. Laminates. KOENIPAT ANSTALT. June 25, 1963 [July 6, 1962; May 8, 1963], No. 25284/63. Heading B5N. [Also in Division F2] A sound insulating element comprises a rigid support covered on at least one surface by a sheet of cellular elastomer having open cells and containing an amount of silica in the range 30-70% by weight, preferably 50%. In the embodiment of Fig. 4, two sheets of veneer I have layers 2 of the said cellular elastomer on their inner surfaces and are separated by spacers 3, e.g. of cardboard, glued to layers 2. In Fig. 3, sheets of veneer 1 and cellular elastomer 2 are combined with a layer 4 of pure silica. Suitable elastomers are latex, polyurethane, P.V.C. or polyether. Cork extract may optionally be added in addition to the silica.
Patent GB-1054097-A (GB)
IPC: C09K11/08
Abstract: 1,054,097. Luminescence. MAGYAR TUDOMANYOS AKADEMIA MUSZAKI FIZIKAI KUTATO INTEZETE. July 30, 1965, No. 32778/65. Heading C4S. [Also in Division C7] The light emission of a crystalline inorganic phosphor is increased by coating the surface of the phospher particles with a layer, one to six molecules thick, of an organic dyestuff, selected from the xanthenes, cyanines, acridines and phthalocyanines. The dye may be applied (a) by dissolving the required quantity of dye in a liquid, slurrying with the phosphor and evaporating the liquid, (b) by dissolving the dye in a liquid at such a concentration that, upon slurrying with the phosphor, the dye partitions on to the phosphor at the required level, separating the phosphor and liquid, and drying, or (c) by vacuum deposition; the phosphor in a layer 20-50 micron thick is maintained at liquid nitrogen temperatures and the dye heated to e.g. 80-500‹ C. depending on the dye, in a vacuum of 10-<SP>4</SP> mm. Hg. Specific dyes mentioned are trypaflavin, copper and zinc phthalocyanine, thiocarbocyanine, di-iodo- and tetraiodofluorescein, and phosphors mentioned are CdS, ZnS: Cu, ZnS: Ag, ZnO: Zn, and ZnS: Zn.
Patent GB-1132327-A (GB)
Abstract: 1,132,327. Fluoronitrosoalkanes. THIOKOL CHEMICAL CORP. 22 Aug., 1966, No. 37605/66. Heading C2C. Fluoronitroso C 1-4  alkanes are prepared by the vapour phase decomposition of a fluoroacyl nitrite by contacting the latter with a refluxing inert liquid at substantially atmospheric pressure, said liquid boiling above 150‹ C. at atmospheric pressure whereby the fluoroacyl nitrite is vaporized, and non-photolytically decomposing said nitrite vapour by pyrolysis in the vapour phase to products including said fluoronitrosoalkane which is thereafter isolated.
Patent GB-1225400-A (GB)
IPC: B23Q16/02
Filed: 1968-11-14
Abstract: 1,225,400. Indexing mechanism; turrets. PAUL FORKARDT K.G. 14 Nov., 1968 [29 Dec., 1967], No. 53973/68. Headings B3B and B3T. An indexing mechanism particularly for tools, workpieces or stops, of a machine tool, comprises a body 1 supporting a spindle 2 and housing two axially-spaced thrust pins 3, 4 which have angled ends 3a, 4d and which have displaceable by fluid pressure to co-operate alternately with polygonal, e.g. square sections 2a, 2b of the spindle to index and lock it in predetermined angular positions. The sections 2a, 2b are relatively angularly displaced by 45 degrees. In a second embodiment (Fig. 6, not shown), the spindle has triangular portions and the thrust pins lie at an angle to each other in the spaced parallel planes. The spindle may carry turning tools 17, Fig. 7, secured by screws 18 in angularly spaced recesses 16.
Patent GB-1225623-A (GB)
IPC: B60J10/04
Filed: 1967-06-12
Abstract: 1,225,623. Glass runs; spring clips. F. T. PRODUCTS Ltd. 11 June, 1968 [12 June, 1967], No. 27096/67. Addition to 837,416. Headings E1J and E2B. The combination claimed in parent Specification is modified by the spring fastener 11 for securing the flexible strip member 21 in the rigid walled channel 25 of a glass run which fastener has formed, in at least one of its limbs, a pair of oppositely directed arms 15, 16, or 15a, 16a, ending in claws 17, 18, or 17a, 18a, each said claw being formed by inwardly bending an end portion of an arm about an axis perpendicular to the web so that each said end portion constitutes a claw bent inwardly of the U-shaped fastener, the said one limb being formed also with a prong 19, 19a, 20 or 20a directed outwardly and away from the web, the inner member 21 being less rigid than and embraced by the unstressed fastener so that the claws penetrate the member 21 and prevent it moving lengthwise in the fastener and when the fastener and member 21 are pushed into the channel 25 the limbs of the fastener are moved together and the claws further penetrate the member 21 and the prongs 19, 19a, 20, 20a engage the walls of the channel member.
Patent GB-1227681-A (GB)
IPC: B41F16/02
Filed: 1969-02-13
Abstract: 1,227,681. Transferring designs. HUNT & MOSCROP Ltd. 6 Feb., 1970 [13 Feb., 1969], No. 7776/69. Heading B6C. Textile web material 1 from reel B is fed between a web 3 bearing heat activable transfer designs and a backing web 2 and is passed around a heated rotating cylinder A the three web sandwiched being pressed against the cylinder by a moving endless belt A<SP>1</SP>.
Patent GB-1228916-A (GB)
IPC: H01L23/29
Filed: 1968-05-09
Abstract: 1,228,916. Sputtering Ta and silica. PHILIPS ELECTRONIC AND ASSOCIATED INDUSTRIES Ltd. May 9, 1968, [May 12, 1967], No.22030/68. Heading C7F. [Also in Division H1]. A resistive layer 2Á thick consisting of a mixture of tantalum and silica is applied to a semiconductor device body by R. F. sputtering using the apparatus shown. The source is a tantalum plate 22 with a quartz disc 24 bolted to it, the layer resistivity being varied by altering the ratio r 2 /r 1 . The plate is capacitively coupled via insulation 28 to a 12Mc/s supply and the support 25 for the silicon body earthed. Sputtering is effected under an argon pressure of 10<SP>-2</SP>mm.
Patent GB-1229704-A (GB)
IPC: A41C1/02
Filed: 1969-01-16
Abstract: 1,229,704. Girdles. CANADIAN LADYCANADELLE Inc. 16 Jan., 1969 [1 March, 1968], No. 2658/69. Heading A3V. A girdle, corselette, panty girdle, swimsuit or the like has a front area including a central panel 4 extending downwardly from the garment waistband 11 and pairs of elastic panels 1-3 extending respectively horizontally, downwardly and upwardly away from the central portion and so stitched together at their adjacent edges that the edges have common foci 23 at the sides 9 of the garment. Similar elastic panels 17, with or without a central panel, may be provided at the rear of the garment, and may have the same faci 23. A stretch or non-stretch crotch piece 18 may be provided, and the garment may have legs 8. The garment is preferably made from spandex fibre knitted with nylon, panels 1-3, 9 and 17 being double ply, panel 4 triple ply and the remaining material single ply. Garters and sliding clasp fasteners may be provided. The elastic panels 1-3 correspond to the wearer's muscles, Figs. 1-4 (not shown).
Patent GB-1231138-A (GB)
IPC: G01M3/16
Filed: 1969-09-30
Abstract: 1,231,138. Gas detectors: photo-electric detection of hydrogen. ENGELHARD MINERALS & CHEMICALS CORP. Sept.30, 1969 [Oct.1, 1968], No.48049/69. Headings G1A and G1N. A hydrogen detector comprises a film containing platinum oxide or preferably palladium oxide, which is reduced in the presence of hydrogen, to cause a change in its resistance or a change in its optical properties, which may be used to operate an alarm buzzer, light or safety control. Optical detection may be by a photo-electric cell responsive to change in transmission or reflectance of the film, which may be deposited on a glass slide or directly on the surface of a light bub. The resistor may be in the form of a strip, or a slotted rod Fig.3 (not shown) which may be mounted in a commercial "quick connect" fitting. The film is not affected by methane or CO 2 , but CO and sulphides should be removed from the gas sample.