baber/WOPTO huggingface dataset:
Patent CA-2078661-C (CA)
Inventor: HOPPITT BERNARD
IPC: B01D39/14
Filed: 1991-03-19
Granted: 2000-01-18
Abstract: L'invention a pour objet un filtre comprenant la combinaison d'une couche de matière filtrante possédant des propriétés électrostatiques et d'une couche d'un moyen filtrant sans propriétés électrostatiques. Ce moyen est constitué d'une matière conçue pour retenir des particules d'une gamme inférieure au micron et, en utilisation, se trouve placé en amont de la matière.
Patent CA-2082013-C (CA)
Title: Mechanical gas chromatography injection valves and column multiplexing techniques
Inventor: SACKS RICHARD DOUGLAS
IPC: G01N30/40
Filed: 1992-11-03
Granted: 1997-01-21
Abstract: Several  embodiments  of  gas  chromatography  systems  are disclosed incorporating mechanical sample injection valves.  The injection valves incorporate a delivery tube having an outlet which is swept past the inlet of a separation column to provide a short duration inlet plug into the separation column.  Carrier gas and sample gas flow is managed through the valve to prevent inadvertent injection after an injection is desired and to assure that  the  sample is  not  contaminated  by past  sample  flow.          Embodiments of injections valve are described for providing inputs into several gas chromatography columns.  In addition, a gas chromatography system is described in which multiple columns are used which are time multiplexed with a single detector to produce a complex combined chromatogram from the plural columns.          By appropriate selection of column characteristics and injection sequence, the resulting chromatogram can provide an overlay of chromatograms  which  provide  good  resolution  of  all  the constituents of the mixture of interest within a short analysis time.
Patent CA-2084755-C (CA)
Inventor: LLOYD DAVID J
IPC: C22C1/10
Filed: 1991-06-10
Granted: 1997-02-25
Abstract: A metal matrix composite material containing discontinuous particles in a metallic matrix is prepared by forming a mix-ture of the molten alloy and the particles in a closed reactor, removing oxygen from the interior of the reactor, statically pressuriz-ing the interior of the reactor with nitrogen gas, mixing the mixture of the molten alloy and particles in the presence of the static nitrogen gas to wet the molten matrix to the particles, and evacuating the interior of the reactor in a stepwise manner. The nitrog-en gas aids in wetting the metallic alloy to the particles by forming aluminum nitride at the particle-molten matrix interface, so that a lower contact angle of the alloy to the particle results. Oxygen that may be present in the sealed reactor is gettered by the aluminum, and the nitrogen is removed by stepwise evacuation, thereby minimizing the introduction of gas into, and retention of gas within, the melt.
Patent CA-2085219-C (CA)
Title: Highly durable cement products containing siliceous ashes
Inventor: MEHTA POVINDAR K
IPC: C04B18/10
Filed: 1991-06-18
Granted: 2004-10-19
Abstract: Cement blends incorporating at least 5 and up to 40% siliceous crop residue ash and cement compositions and products containing said blends are provided. At least about 50% of the ash particles are in the 10-75 micrometer size distribution range and the mean diameter is greater than 6 micrometer. Methods for decreasing the permeability of hardened cement products and a method for accelerating the early strength of a concrete mixture containing fly ash are also provided.
Patent CA-2086549-C (CA)
Title: Optical waveguide amplifier
Inventor: MASSICOTT JENNIFER FRANCES
IPC: H01S3/067
Filed: 1991-07-18
Granted: 1998-05-05
Abstract: An optical fibre amplifier (50) comprises a SiO2-Al2O3-GeO2 single-mode optical fibre (52) doped with Er3+. It is pumped by 1.55 .mu.m and 1.47 .mu.m optical sources (54 and 56) whose optical ou tputs are combined by an optical coupler (58) and are then coupled to the fibre (52) by a further optical coupler (50). A source o f optical signals to be amplified (62) is also coupled to the fibre (52) by the further coupler (60). The Er3+ ions provide a three-lev el lasing scheme with a fluorescence peak at about 1.53 .mu.m. Low noise amplification of optical signals in the long-wavelen gth tail of the fluorescence spectrum with suppressed ASE at the fluorescence spectrums peak wavelength is obtained as foll ows. The 1.47 .mu.m pump provides some low noise amplification of the optical signal but preferentially amplifies the 155 .mu.m p ump source. The resultant 1.55 .mu.m amplified pump signal then provides pump power to amplify the optical signal whilst suppressing ASE as it has a longer wavelength than the fluorescence peak wavelength.
Patent CA-2090423-C (CA)
Inventor: CARCASONA ALFONS
IPC: C07C69/16
Filed: 1992-06-24
Granted: 1997-10-14
Abstract: The invention is concerned with a process for the preparation of diacetylrhein having a residual content of undesired aloe-emodin derivatives less than 20 ppm. Rhein-9-anthrone-8-glucoside containing aloe-emodin derivatives is subjected to a liquid-liquid partitioning between a polar organic solvent which is only partly miscible with water and an aqueous phase; the rhein-9-anthrone-8-glucoside contained in the aqueous phase after the partitioning is oxidised to rhein-8-glucoside; the glucose radical in the 8-position of the rhein-8-glucoside obtained is split off in an acidic medium; the rhein obtained is acetylated to obtain diacetylrhein having a residual content of undesired aloe-emodin derivatives up to about 50 ppm; and the diacetylrhein thus obtained is recrystallised to reduce the residual content of undesired aloe-emodin derivatives to less than about 20 ppm. Alternatively, a mixture of sennosides is reduced to the corresponding rhein-9-anthrone-8-glucoside and aloe-emodin-anthrone-8-glucoside derivatives; the compounds obtained are subjected to a liquid-liquid partitioning between a polar organic solvent which is only partly miscible with water and an aqueous phase; the rhein-9-anthrone-8-glucoside contained in the aqueous phase after the partitioning is oxidised to the corresponding anthraquinone compound; the glucose radical in the 8-position of the anthraquinone compound obtained is split off in an acid medium; the 1,8-dihydroxyanthraquinone compound obtained is acetylated to obtain diacetylrhein having a residual content of undesired aloe-emodin derivatives up to about ppm; and the diacetylrhein thus obtained is recrystallised to reduce the residual content of undesired aloe-emodin derivatives to less than about 20 ppm. Diacetylrhein is a medicinally-active compound which possesses anti-arthritic, anti-inflammatory, antipyretic and analgesic activities.
Patent CA-2092442-C (CA)
Title: Ac/dc-converter
Inventor: RIDLEY RAY
IPC: H02M7/23
Filed: 1993-03-25
Granted: 2002-06-11
Abstract: AC/DC convertor to connect to conductors of a multi-phase AC source and a plurality of parallel to each other power factor correction circuitries. There are as many rectifier circuits independent of each other as there are phases of the AC source. Each rectifier circuit has six rectifier elements connected in pairs to the conductors of the AC source and are commonly connected to the output conductors of the rectifier circuit associated therewith forming bridges. There is at least one switch associated with at least one pair of rectifier elements to separate such pair from the conductor of the AC source. Each rectifier circuit is connected to a power factor correction network. Sensors are used for the functional control of both of the phases of the AC source and the one phase power factor correction network. There is a switch control logic connected with such sensors and which based on the signals from the sensors closes or opens the switches of the rectifier network.
Patent CA-2093928-C (CA)
Inventor: WILLINGHAM MARK C
IPC: A61K47/48
Filed: 1991-10-09
Granted: 2000-02-29
Abstract: L'invention se rapporte à un anticorps monoclonal, appelé K1, et à ses utilisations. En particulier, l'anticorps monoclonal peut être utilisé comme agent de ciblage thérapeutique dans le traitment et le diagnostic de nombreuses formes de cancer.
Patent CA-2094937-C (CA)
Title: Method for de-hairing animals
Inventor: BOWLING ROD A
IPC: A22B5/08
Filed: 1991-10-24
Granted: 2002-04-30
Abstract: A method for removing hair from the hide of an animal to be slaughtered in order to reduce bacterial contamination of meat and meat by-products. A bovine is first immobilized and a depilatory substance of sodium sulfide is sprayed onto the ani-mal's hide for 1-60 seconds. After a dwell time of about 1-180 seconds, the hair contacted by the depilatory substance is removed by directing pressurized jets of water at the animal's hide. Neutralizing agents are then sprayed onto the animal to stop the depila-tory process and the animal is conveyed to an exsanguination station for further processing.
Patent CA-2101967-C (CA)
Inventor: KAYSER MARK H
IPC: E04D13/00
Filed: 1993-08-05
Granted: 2005-10-25
Abstract: Long-term algicidal granules show improved color fastness over previously known granules. The granules have a ceramic coating comprising three layers, the first two of which have a copper compound such as cuprous oxide therein at relatively equal amounts. The ceramic coating further includes a third layer having pigment, a borate compound, and zinc oxide having an average particle size less than about 0.13 micrometer.      In particular it has been found that the use of cuprous oxide allows conversion to black cupric oxide, which is more insoluble than cuprous oxide and black in color, allowing the algae-resistant granules to retain their original color for longer periods of time under weathering conditions. Methods of producing such ceramic-coated granular materials are also disclosed.
Patent CA-2107077-C (CA)
Title: Hair conditioning shampoo compositions with silicone conditioning agent
Inventor: INMAN EVERETT J
IPC: C11D1/82
Filed: 1992-03-18
Granted: 1997-12-23
Abstract: Disclosed are hair conditioning shampoo compositions, containing a detersive surfactant component, a silicone hair conditioning agent, and water and preferably; comprising a suspending agent for the silicone conditioning agent. The detersive surfactant component comprises, at least in part, polyethylene glycolglyceryl ratty ester nonionic surfactant. The composition hereof provide improved silicone deposition.
Patent CA-2116113-C (CA)
Title: Apparatus for transmitting instrumentation signals over power conductors
Inventor: ATHERTON ERIC JOHN
IPC: E21B47/12
Filed: 1992-09-07
Granted: 2002-11-26
Abstract: A downhole instrumentation system (1) com-prises one or more transducers (11-14) coupled in a DC current circuit between the star point (18) of an electrical submersible pump (2) and the chassis (15). A sensing circuit including a DC power sup-ply (7) and an ammeter (8) is arranged to monitor the current drawn. The system includes alive elec-tronic components which provide a sequence of sig-nals that may include reference and measuring sig-nals or multiplexed signals from the transducers (11-14).
Patent CA-2118789-C (CA)
Title: Device for hyperthermia treatment
Inventor: WALLSTEN HANS IVAR
IPC: A61M29/02
Filed: 1992-09-18
Granted: 1999-11-16
Abstract: A device for carrying out so called hyperthermia in a body cavity or duct, the access path of which is narrow, characterized by an elongate distal section (3) intended to be inserted into said cavity or dud comprising a centrally located) heat-releasing element (19), which is either surrounded by an elongate housing or is itself constituted by an elongate housing, and a flexible and/or: elastic enclosure (37) surrounding said housing in a liquid-tight manner) further including means (13, 15) for supplying energy to the heat-releasing element (19) and an axially operating inlet passage (35) at the proximal part of the housing, an outlet (33; 68; 87) from the housing being arranged for the supply of heat-transmitting medium under pressure for expansion of the flexible enclosure (37) to accommodate and to exert a controlled pressure on surround walls to said cavity or dud; and further characterized by a second inlet to the housing and means for internal circulation of said medium through the housing, the heat-releasing element being of an inherently self regulating type; and a method for carrying out so called hyperthermia in a body cavity, i.e. while suplying heat to said body cavity, with simultaneous application of a controlled pressure on surrounding tissue, characterized in that the supply of heat is carried out while using a heat-emitting system of an inherently self-regulating type.
Patent CA-2124038-C (CA)
Title: Fiber optic splicer-connector
Inventor: ESSERT ROBERT
IPC: G02B6/38
Filed: 1994-05-20
Granted: 2001-01-02
Abstract: An optical fiber splicer-connector comprises a fiber section, a splice section, and a connecting section. The splice section is located between the fiber section and the connecting section. A fiber channel is disposed on the fiber section for accepting an optical fiber and for guiding the optical fiber to the splice section. Means for splicing optical fibers is located on the splice section. A fiber channel is disposed on the connecting section for accepting an optical fiber and for guiding the optical fiber to the splice section. The connecting section includes a connecting body for releasably attaching the splicer to an adapter. In one embodiment, the splice section and the connecting section are provided as separate, interengagable pieces.
Patent CA-2124078-C (CA)
Title: Set of paving stones, process and device for producing the same
Inventor: HAGENAH GERHARD
IPC: B28B23/00
Filed: 1992-11-20
Granted: 1998-11-24
Abstract: In lawn covers made of paving stones (10) mutually separated by a relatively large gap, the paving stones are linked to each other so as not to move in relation to each other by a holding grid (11) imbedded in the paving stones (10) and composed of traction-resistant branches, so that traction forces are transmitted and the paving stones (10) are mutually secured as a linked group of paving stones by holding grid (11). The set of paving stones is produced in an essentially classical concrete stone mould. A moulding box (19) arranged on a bearing board (28) or draw plate (29) is horizontally subdivided along the horizontal plane (33), forming a top partial moulding box (34) and a bottom partial moulding box (35). the holding grid (11) is clamped between both partial moulding boxes during concreting. When a group of paving stones is ready, the bottom partial moulding box (35) withdrawn from the concrete stone mould. The finished product can then be removed as usual from the mould
Patent CA-2133685-C (CA)
Inventor: RYHANEN TAPANI
IPC: G01R27/26
Filed: 1994-10-05
Granted: 2006-08-15
Abstract: The invention is related to a feedback method and apparatus for a capacitive differential pressure transducer. According to the method, a pressure-transducing conducting diaphragm (1) forming a first, moving electrode of the transducer capacitances is kept in a force balance state by means of a pulse train signal applied to a fixed electrode (2, 3). According to the invention, the diaphragm (1) is kept stationary in a geometrically constant state and a desired electric potential is applied to said diaphragm (1), said pulse train signal is applied to at least two of said fixed electrodes (2, 3), or alternatively, sets of fixed subelectrodes so that the signals applied to said separate electrodes (2, 3) or sets of subelectrodes are at opposite polarities referenced to the electric potential of the pressure-transducing diaphragm (1) for at least a portion of the measurement duration, and the signals applied to said separate electrodes (2, 3) or sets of subelectrodes are of equal amplitude at least for each pair of electrodes (2, 3), and the same pulse train signal is simultaneously used for both establishing the force balance and performing the capacitance measurement. According to a preferred embodiment of the invention, changes in the dielectric coefficient of the transducer fill medium are compensated for by altering the pulse amplitude, pulse width or pulse rate depending on the primary modulation method used in the feedback control.
Patent CA-2141800-C (CA)
Title: Filter for filtering gases changed with particles
Inventor: PUTTAERT EMIEL
IPC: B01D46/24
Filed: 1993-08-03
Granted: 2000-10-17
Abstract: PCT No. PCT/BE93/00052 Sec. 371 Date Feb. 1, 1995 Sec. 102(e) Date Feb. 1, 1995 PCT Filed Aug. 3, 1993 PCT Pub. No. WO94/03260 PCT Pub. Date Feb. 17, 1994.A filter for continuous, industrial-scale filtering of gases charged with solid particles which includes a cylindrical filter body having at least one filtering section divided into an inlet chamber and an outlet chamber by a funnel-shaped separation wall with annular steps, multiple tube filters being fitted in holes provided therefor in the horizontal sections of the separation wall. All parts are positioned substantially symmetrically in a concentric, radial manner with respect to the vertical axis of the cylindrical filter body sidewall. This symmetrical, concentric, radial arrangement enables the filter to operate without any problems at temperatures of 900 DEG  C.
Patent CA-2151695-C (CA)
Inventor: DENIS PHILIPPE
IPC: B01J29/06
Filed: 1995-06-13
Granted: 2000-10-17
Abstract: La présente invention concerne un procédé de séparation de diacides aliphatiques saturés, à partir de mélanges contenant également au moins de l'acide adipique, par transformation d'au moins une partie desdits diacides en anhydrides correspondants. Plus précisément, elle consiste en un procédé de séparation d'au moins une partie d'un ou plusieurs diacides aliphatiques saturés ramifiés ayant 6 atomes de carbone, à partir de mélanges les contenant avec au moins de l'acide adipique, caractérisé en ce que ledit ou lesdits diacides sont transformés au moins partiellement en anhydrides correspondants.
Patent CA-2152497-C (CA)
Title: Method and apparatus for detecting an input signal level
Inventor: CONNELL LAWRENCE EDWIN
IPC: G01R19/00
Filed: 1994-10-17
Granted: 1999-01-12
Abstract: A level detector detects an input signal lever (205). A rectifier (210) receives the input signal and provides a rectified signal (215). A prefilter (220) receives the rectified signal and attenuates high frequency components at frequencies near multiples of a decimation sample rate. The prefilter signal (225) is decimitated by a decimator (230) and low pass filtered by a low pass filter (240) having a passband below the input frequency of the input signal. The level detector can be provided to control a variable gain stage circuit which applies a gain to the input signal based on the level to form a dynamic range compressor or expander.
Patent CA-2153546-C (CA)
Title: Periwinkle grain extract and composition containing the same
Inventor: FODOR PIERRE
IPC: A61Q19/08
Filed: 1995-07-10
Granted: 2002-11-19
Abstract: Extract isolated from periwinkle (Catharanthus roseus) seeds comprises proteins, amino acids, organic acids and sugars and is obtd. by bioconversion. Also claimed are:(a) a process for producing the above extract which comprises grinding periwinkle seeds, pre-digesting the ground seeds with an amylase and/or cellulase, fermenting the prod. with microorganisms and filtering, and(b) a compsn. contg. periwinkle extract.
Patent CA-2154287-C (CA)
Title: Microwave oven with a single thermostat to sense temperature of both the magnetron and the microwave cavity
Inventor: LEE JONG WOOG
IPC: F24C7/08
Filed: 1995-07-06
Granted: 1999-09-28
Abstract: This invention discloses an improved safety device for microwave oven having one thermostat commonly preventing possible overheat of the cavity and magnetron of the microwave oven. The thermostat is placed in a position suitable for sensing both a peripheral temperature of a magnetron and a temperature of an air exhausted from a heating cavity through an air exhaust port. The thermostat cuts off the outside electric power for the microwave oven when the peripheral temperature of the magnetron or the temperature of the exhaust air coming out of the heating cavity is higher than a predetermined allowable temperature. The air exhaust port is provided about the magnetron. The thermostat mounting bracket is connected to the magnetron mounting bracket.
Patent CA-2167000-C (CA)
Title: Method and installation for fire extinguishing using a combination of liquid fog and a non-combustible gas
Inventor: SUNDHOLM GORAN
IPC: A62C35/02
Filed: 1994-07-07
Granted: 2005-09-27
Abstract: The object of the invention is to provide a new method and a new installatio n for fighting fire, in particular for spaces involving fire risk under a floor structure or in cabinets for electrical apparatuses. According to the invention, a liquid fog is sprayed in the major part of the space, which major part can be considered as a normal room, while a non- combustible gas, preferably heavier than air, is sprayed into narrow partial spaces for cables etc.
Patent CA-2195664-C (CA)
Inventor: TAYLOR ANDREW PAXTON
IPC: H04M3/487
Filed: 1995-08-04
Granted: 1999-10-12
Abstract: Noeud de service destiné à être utilisé dans un réseau de communications intelligent afin d'offrir des services aux utilisateurs. Ce noeud comprend des moyens de définition de services, permettant de définir un ensemble de services; une première ressource comprenant une mémoire de segments vocaux contenant, pendant l'utilisation, des segments vocaux, chaque segment possédant une identité correspondante, et des moyens de commande de ressources destinés à convertir un signal de commande reçu en une suite correspondante d'identités de segments vocaux pour une annonce vocale correspondant au signal de commande, à accéder à la mémoire de segments vocaux en fonction desdites identités de segments vocaux, à produire les segments vocaux correspondants pour l'annonce vocale et à fournir un signal d'annonce complète lorsque le dernier segment vocal de l'annonce a été produit; un commutateur destiné à  relier la première ressource à un appel entrant acheminé par le réseau au noeud de service; et des moyens de commande du noeud destinés à réagir à un appel entrant de façon à transmettre les détails de l'appel aux moyens de définition de services afin de traiter ou mettre en file d'attente l'appel selon les besoins, à transmettre les signaux des moyens de définition de services à la première ressource et au commutateur, et à transmettre les signaux d'annonce complète de la première ressource aux moyens de définition de services.
Patent CA-2201004-C (CA)
Inventor: PARISI PAUL J
IPC: B01D53/14
Filed: 1997-03-25
Granted: 2001-11-27
Abstract: The invention relates to a method of confining sulfur dioxide for storage or transportation under safe conditions.  The method of  the  invention  comprises  the steps of  (a) contacting a sulfur dioxide-containing gas stream with an absorbing medium comprising water and a water-soluble amine absorbent having at least one amine group with a pKa value greater than about 7 and at least one other amine group with a pKa value less than about 6.5 so that the at least one amine group with a pKa value greater than about 7 irreversibly absorbs sulfur dioxide in salt form rendering the amine absorbent non-volatile and the at least one other amine group with a pKa value less than about 6.5 reversibly absorbs sulfur dioxide, to thereby saturate the absorbing medium with sulfur dioxide against a partial pressure of sulfur dioxide of no more than about  1  atmosphere  at 25°C;  and  (b) charging the absorbing medium saturated with sulfur dioxide obtained in step (a) into a container for storage or transportation.