baber/WOPTO huggingface dataset:
Patent CA-2265622-A1 (CA)
Title: Process and system for removal of hydrogen sulfide from a gas stream
Inventor: DEBERRY DAVID W
IPC: C01B17/05
Filed: 1997-09-08
Abstract: A process and system for removing hydrogen sulfide from a gaseous stream such as one of natural gas. A sour gas stream containing H2S is contacted with a nonaqueous, water-insoluble sorbing liquor which comprises an organic solvent for elemental sulfur, dissolved elemental sulfur, an organic base to promote the reactions, and an organic solubilizing agent, an agent suitable for maintaining the solubility of polysulfide intermediate which may otherwise separate when they are formed during operation of the process. Hydrogen sulfide (H2S) gas is sorbed into this liquor and then reacts with the dissolved sulfur in the presence of the base to form polysulfide molecules. The solution is then sent to a reactor where sufficient residence time is provided to allow the polysulfide forming reactions to reach the desired degree of completion. From the reactor, the solution flows to a regenerator where the solution is oxidized (e.g., by contact with air), forming dissolved elemental sulfur and water. The temperature of the solution is then lowered, forming sulfur crystals, which are easily removed by gravity settling, filtration, centrifuge, or other separation method. Enough sulfur remains dissolved in the solution following removal of the sulfur crystals that when this solution is reheated and returned to the absorber a sufficient amount of sulfur is present to react with the inlet H2S gas.
Patent CA-2266299-A1 (CA)
Title: Process for preparation of (s)-oxetine enantiomers
Inventor: GATTUSO MARK J
IPC: C07C217/48
Filed: 1999-03-23
Abstract: (S)-oxetines are preparedin high enantiomeric purity centers on resolution using simulated moving bed chromatography of a racemic precursor early in the oxetine synthesis. Resolution is effected with high enantiomeric purity, and subsequent reactions of the desired enantiomer performed with high optical specificity to maintain enantiomeric purity. The undesired enantiomer may be racemized and recycled to the resolution phase to avoid undesired losses.
Patent CA-2266727-A1 (CA)
Title: Dental scaling system
Inventor: CORBELLINI ALFRED E
IPC: A61C1/00
Filed: 1997-09-22
Abstract: An ultrasonic dental tooth treatment system includ-ing an ultrasonic dental handpiece, a fluid reservoir hous-ing and a power control housing. The reservoir housing is supported by the control housing. The reservoir housing encloses two containers which are connected to the selec-tor valve. The selector valve is connected to a control housing conduit which is connected to the handpiece. The control housing encloses a power control circuit which is connected to the handpiece. In a preferred embodiment of the invention a fluid dispenser includes at least one read-ily removable reservoir container supported by a reservoir housing having a pivotable cover and a fluid control valve.  The cover is pivotable between an open position and a closed position. The valve is closed by the cover when the cover is in its open position.
Patent CA-2266925-A1 (CA)
Title: Skin care compositions containing an amide and retinol or retinyl ester
Inventor: GRANGER STEWART PATON
IPC: A61Q19/02
Filed: 1997-09-18
Abstract: N-substituted fatty acid amides of specific structure sufficiently inhibit LRAT or ARAT catalyzed esterification of retinol into inactive retinyl esters, thus having the same effect on keratinocytes as retinoic acid.  Effects of retinol or retinyl esters in combination with these N-substituted fatty acid amides are analogous to treatment with retinoic acid.
Patent CA-2269868-A1 (CA)
Inventor: ISHII DAIJI
IPC: G06F7/544
Filed: 1999-04-22
Abstract: Multipliers 107 through 110 carry out an multiplication operation with two data out of the four data transferred from a memory over buses 101 through 104. The multiplication results are subjected to an addition or subtraction operation with each other in adder-subtracters 111 and 112. The operation results obtained by the adder-subtracters 111 and 112 are supplied to adders 113 and 114 where they are added to values held by accumulators 115 and 116. A latch circuit 105 supplies the data transferred through the bus 102 to the multiplier 109 when a control signal 106 indicates "ON". The latch circuit 105 temporarily holds the data transferred through the bus 102 and supplies the data held therein to the multiplier 109 when a control signal 106 indicates "OFF".
Patent CA-2271388-A1 (CA)
Title: Liposomes encapsulating polynucleotides operatively coding for immunogenic polypeptides
Inventor: GREGORIADIS GREGORY
IPC: C12N15/88
Filed: 1997-09-15
Abstract: Cationic liposomes with entrapped polynucleotide in the intravesicular space are described. The liposomes include cationic components such as cationic lipids such as DOTAP. Preferably the method of forming liposomes uses the dehydration-rehydration method in the presence of the polynucleotide. The polynucleotide preferably operatively encodes an antigen capable of eliciting a desired immune response, that s, is a gene vaccine.
Patent CA-2273746-A1 (CA)
Inventor: BREIT OSWALD
IPC: D03D1/00
Filed: 1999-06-07
Abstract: Fiber cement felts of the present invention include: a top fabric layer that includes fine machine direction yarns and fine cross machine direction yarns interwoven with the fine machine direction yarns; a bottom fabric layer underlying the top fabric layer that includes coarse machine direction yarns and coarse cross machine direction yarns interwoven with the coarse machine direction yarns; and a batt layer attached to and overlying the top fabric layer. Preferably, the top fabric layer is heat bonded to the bottom fabric layer. It is also preferred that the fiber cement felt of the present invention include a second butt layer that underlies the bottom fabric layer. In this multiple layer structure, the felt can have higher tenacity, improved resistance to blinding and compaction, and a reduced tendency to mark a fiber cement sheet during its formation.
Patent CA-2273995-A1 (CA)
Inventor: HERRON DAVID KENT
IPC: C07C235/34
Filed: 1997-11-25
Abstract: La présente invention concerne une classe de nouveaux phényl acétamides ainsi que l'utilisation de ces composés s'agissant d'inhiber la libération des acides gras à médiation sPLA¿2? de manière à traiter des troubles tels qu'un choc septique.
Patent CA-2274042-A1 (CA)
Title: Aeration diffuser
Inventor: DICKMAN DANIEL H
IPC: B01F3/04
Filed: 1998-04-02
Abstract: A diffuser (1) for mixing and oxygenating water or other liquid with an airstream employs a self supporting micro-porous tubular membrane (11), arranged in a spiral or grid configuration, with openings which are at least equal to the diameter of the membrane (11), extending both horizontally and vertically between the circuits or grids of the diffuser (1). Gas, when forced through the tubular membrane (11), forms fine bubbles which agitate, oxy-genate and entrain the surrounding liquid as it slowly rises through the openings. The tubular membrane (11) is flexible and is to be mounted on a manifold (14, 15) which connects it to a source of air or gas, and which may also impart buoyancy or serve as an anchor in the liquid.
Patent CA-2275390-A1 (CA)
Inventor: WASEM GABRIELE
IPC: C11D3/395
Filed: 1997-12-12
Abstract: The invention relates to a novel method for the "dry" production of sodium percarbonate (dry process). Monohydrate crystal is reacted with a quasi-stoichiometric quantity of concentrated aqueous hydrogen peroxide solution, in relation to the quantity of active oxygen required in the sodium percarbonate.  This method can be combined to great advantage with the subsequent compaction of the sodium percarbonate obtained. Sodium percarbonate products containing varying concentrations of active oxygen of at least 10 weight percent, but in particular with high active oxygen concentrations of above 14.5 weight percent, can be produced. The resulting sodium percarbonate products are characterized in that they have remarkably advantageous characteristic as regards dissolution rate, stability and compatibility with detergent base, and are superior to conventional sodium percarbonates obtained, for example, by a crystallisation process. The invention also relates to said percarbonate sodium products and detergent compounds containing same.
Patent CA-2276466-A1 (CA)
Inventor: GOODPASTER BARRY G
IPC: H02H7/30
Filed: 1998-01-21
Abstract: Cette invention concerne un système et un procédé assurant une protection de sauvegarde en cas de défaillance d'un relais et d'un coupe-circuit dans une ligne d'alimentation, simples à mettre en oeuvre et n'exigeant qu'un minimum d'espace. Un dispositif de commande programmable est couplé aux lignes d'alimentation d'une sous-station de puissance comprenant les coupe-circuits et les relais. Le dispositif de commande programmable détecte le moment où un relais n'a pas été capable de détecter une condition prédéterminée (Fig. 3a, 100) et déclenche une protection de sauvegarde pour envoyer un signal au coupe-circuit associé au relais défaillant pour que ce dernier disjoncte (Fig. 3b, 120). Le dispositif de commande programmable est également couplé pour détecter la défaillance d'un coupe-circuit et son incapacité à s'ouvrir sur commande et génère un signal de commande pour tous les coupe-circuits couplés au dispositif de commande programmable afin qu'ils s'ouvrent. Cette invention concerne également un système et un procédé de refermeture intégrée des coupe-circuits dans une sous-station de puissance. Le dispositif de commande programmable est programmé pour détecter l'ouverture d'un coupe-circuit et déclencher une fenêtre de refermeture pendant laquelle il peut générer un signal de commande au coupe-circuit ouvert lui demandant de se refermer.
Patent CA-2277142-A1 (CA)
Title: Charniere mise en equilibre, avec couple de friction variable
Inventor: RUDE EDWARD T
IPC: G06F1/16
Filed: 1997-12-02
Abstract: Cette invention se rapporte à une charnière, qui assure un maintien en équilibre et une friction variable pour une écran d'affichage ou un couvercle (7) d'ordinateur bloc-notes. Dans le mode de réalisation préféré, une tige de torsion (25) fournit une force de rétablissement qui augmente à mesure que le couvercle est déplacé dans l'une ou l'autre direction à partir de sa position verticale. Une charnière à friction, d'une conception bien connue, utilise une bande à ressort (23), enroulée autour d'un arbre (21). L'une des extrémités de la tige de torsion est couplée à l'extrémité de la bande de la charnière à friction, pour que le moment s'exerçant dans la tige de torsion fasse augmenter ou diminuer le moment s'exerçant dans la bande à ressort de la charnière, modifiant ainsi le couple de friction en proportion. On peut ainsi obtenir un couple de friction bas, dès l'ouverture du couvercle, puis plus grand à mesure que l'écran d'affichage atteint une zone de déplacement correspondant à des positions d'utilisation.
Patent CA-2282372-A1 (CA)
Title: Radio frequency planning and assignment in a discontiguous spectrum environment
Inventor: PRZELOMIEC THOMAS A
IPC: H04W16/14
Filed: 1998-02-13
Abstract: Techniques and systems for formalizing discontiguous spectrum frequency planning maximize system capacity while minimizing the potential for adjacent channel interference. Within the context of an overall system frequency plan, spatial separation can be used to offset overlap resulting from channelization mapping when additional frequencies are not available. Site by site modification and/or design can be used to prevent intermodulation products and/or adjacent channel interference effects. A variety of factors can be taken into account including, for example, control channel position and separation in a new spectrum, probability block utilization, threshold levels for adjacent channel interference, symmetric vs. non-symmetric adjacent channel interference, frequency plan type, Antenna Near Part (ANP) separation, intermodulation effects, local topography, frequency environment conditions, and site availability. These techniques are especially useful for (although not limited to) establishing a downbanded cellular (DBC) radio communication system by overlaying 30 kHz channelization on portions of the Specialized Mobile Radio (SMR) band having 25 kHz channelization.
Patent CA-2284017-A1 (CA)
Title: Collating and sorting apparatus
Inventor: JOHNSON RODNEY GEORGE
IPC: A63F1/12
Filed: 1998-03-13
Abstract: A collation and/or sorting apparatus for groups of articles is exemplified by a sorting and/or shuffling device for playing cards. The apparatus comprises a sensor (15) to identify articles for collation and/or sorting, feeding means to feed cards from a stack (11) past the sensor (15) to a delivery means (14) adapted to deliver cards individually to a preselected one of a storing means (24) in an indexable magazine (20). A microprocessor (16) coupled to the feed means (14), delivery means (18), sensor (15) and magazine (20) determines according to a preprogrammed routine whether cards identified by sensor (15) are collated in the magazine (20) as an ordered deck of cards or a randomly ordered or "shuffled" deck.
Patent CA-2284703-A1 (CA)
Inventor: TANNER ERROL ROBERT
IPC: A01B35/16
Filed: 1998-03-23
Abstract: Cette invention concerne des améliorations apportées à des dispositifs de travail du sol par le fait que l'on confère un mouvement vertical et latéral à des lames de coupe du sol. Certains aspects de la présente invention comprennent des modifications apportées également à des sabots.
Patent CA-2285281-A1 (CA)
Inventor: TAKARA MUNEAKI
IPC: H02K49/10
Filed: 1998-03-25
Abstract: A revolution assisting device for a rotating body comprises the rotating body provided on an outer peripheral surface thereof with permanent magnets, and a shaft connected to the rotating body by means of a crank mechanism and provided with permanent magnets, the shaft effecting vertical movements to assist revolution of the rotating body. The revolution assisting device for a rotating body further comprises a first magnet section and/or a second magnet section adapted to be slidingly moved in a diametrical direction of the rotating body by means of the crank mechanism which comprises the rotating body mounted to a rotating axis of a crank shaft and a connecting rod mounted to a crank arm of the crank shaft, and a first magnetic field arranged along the vicinity of a part or an entirety of a circumference about the center of rotation of the rotating body for generating an attracting force between it and the first magnet section, and/or a second magnetic field arranged along the vicinity of a part or an entirety of a circular path, which the second magnet section draws on a side surface of the rotating body, by its sliding movements, for generating an attracting force between it and the second magnet section.
Patent CA-2288871-A1 (CA)
Title: Modular valve assembly
Inventor: RUSSELL ROBERT L
IPC: F16K31/524
Filed: 1997-05-02
Abstract: A pre-assembled valve mechanism (34) for use in valve controlled internal combustion engines and the like (20) which is constructed and arranged to be installed and removed quickly as a unitary module with minimum effort and expenditure of time; the module comprising a cylindrical housing (50) with a valve seat (59) and exhaust port (42a), a headed valve (60), co-operable with the seat (59), a valve guide (65), a return spring (70) and a valve actuating cam follower (80) coaxially mounted in operating position with the housing (50).
Patent CA-2289301-A1 (CA)
Title: Casing hammer assembly for cable tool drilling apparatus
Inventor: ANDERSON VAUGHN J
IPC: E21B1/02
Filed: 1999-11-10
Abstract: A casing hammer assembly for a cable tool drilling apparatus and a cable tool drilling apparatus employing the casing hammer assembly. The casing hammer assembly includes a hammer housing which is positioned on a casing pipe and having a central aperture for through passage of a cable tool drilling string. An impact anvil is located in the housing, surrounding the central aperture, and a reciprocal hammer is mounted for striking the anvil. An eccentric arrangement is employed for raising the hammer for repeated striking of the anvil in order to sink the casing pipe. A hydraulic arm is utilized for laterally positioning the hammer housing in relation to the casing pipe.
Patent CA-2289340-A1 (CA)
Title: Polarimeter
Inventor: GARRETT CAREY M
IPC: G01J4/04
Filed: 1999-11-10
Abstract: The state of polarization of an input light beam is tested by determining four components of a Stokes vector of the light. These correspond to components of the light in three polarization states, S1: linear horizontal, S2: linear at 45 degrees, S3:  right circularly polarized, and S0 the total power. It is not necessary to filter out these components directly and measure their powers. In accordance with this invention it is more convenient to measure the powers in three arbitrary polarization states that have known relationships to each other, and, also measure the total power. The actual Stokes vector components is calculated from this information. Conveniently, a device having three polarization beam splitting surfaces and a prism provides a novel way in which to obtain the necessary information from an input beam so that a set of equations can be solved to determine the state of polarization the input beam.
Patent CA-2289676-A1 (CA)
Title: Prophylactic/therapeutic agents for atherosclerosis
Inventor: CYNSHI OSAMU
IPC: C07D307/79
Filed: 1998-04-23
Abstract: Preventives/remedies for arteriosclerosis containing as the active ingredient compounds represented by general formula (1), potential optically active isomers thereof, or pharmaceutically acceptable salts of the same. In said formula (1) R1 represents hydrogen or acyl; R2 represents lower alkyl; R3 represents hydrogen or lower alkyl; and R4, R5 and R6 represent each hydrogen, alkyl, alkenyl, alkynyl or aryl, or R2 and R4 may form together with the oxygen atom a furan or dihydrofuran ring, and R5 and R6 may form together cycloalkyl on which at least one methylene is optionally substituted by oxygen, sulfur or alkylated nitrogen to give a heterocycle.
Patent CA-2289729-A1 (CA)
Inventor: AUDOUSSET MARIE-PASCALE
IPC: A61K8/23
Filed: 1999-11-08
Abstract: Composition for oxidation dyeing of keratinic fibers comprises: (a) at least one developer; (b) a coupler selected from 1,3-bis(2-hydroxyethylamino)-2-methylbenzene and its acid-addition salts; and (c) at least one coupler selected from m-aminophenols (I) or (I') and their acid-addition salts. Component (c) is of formula (I) or (I') and their salts: R1, R2 = H, 1-4C alkyl, 1-4C monohydroxyalkyl or 2-4C polyhydroxyalkyl; R3 = H, 1-4C alkyl, 1-4C alkoxy or halogen; R4 = H, 1-4C alkyl, 1-4C alkoxy, 1-4C monohydroxyalkyl, 2-4C polyhydroxyalkyl, 1-4C monohydroxyalkoxy or 2-4C polyhydroxyalkoxy; R'1, R'2 = H, halogen, 1-4C alkyl, 1-4C monohydroxyalkyl, 2-4C polyhydroxyalkyl, 1-4C alkoxy, 1-4C monohydroxyalkoxy or 2-4C polyhydroxyalkoxy; R'3, R'4 = H, 1-4C alkyl, 1-4C monohydroxyalkyl, 2-4C polyhydroxyalkyl or 1-4C aminoalkyl; provided that: (i) at least one of R1-R4 is other than H; (ii) at least one of R1, R3 and R4 is H; (iii) at least one of R'1 and R'2 is halogen; and (iv) R4 is not methyl when R1-R3 are all H. Independent claims are also included for the following: (1) a method for dyeing keratinic fibers comprising applying the oxidation dye composition and developing the color with an oxidizing agent added just before use or applied simultaneously or sequentially in an oxidizing composition; (2) a kit comprising a compartment containing the oxidation dye composition and a compartment containing an oxidizing composition.
Patent CA-2291684-A1 (CA)
Title: Span management system for wavelength division multiplexed network
Inventor: PETERS-RODBELL MICHAEL B
IPC: H04B10/077
Filed: 1998-05-27
Abstract: The present invention is directed to an optical network management system in which each network element exchanges identification and status information for performing various monitoring and control functions in the optical network.      A network communication system comprising an optical communication path and a plurality of network elements disposed along the optical communication path. A first network element coupled to the optical communication path includes a first processor and a first optical component. The status of the first optical component being monitored by the first processor. The first processor generates a first electrical signal in accordance with the status of the first optical component. The first network element also includes a service channel transmitter coupled to the first processor and emits a second optical signal to the optical communication path at a second wavelength different than the first plurality of wavelengths in response to the first electrical signal. The second optical signal being modulated in accordance with the second electrical signal. A second network element is coupled to the optical communication path and includes a second processor, and second optical component coupled to the second processor and a service channel receiver coupled to the first processor and to the optical communication path. The receiver senses the second optical signal. The service channel receiver outputs a second electrical signal to the second processor in response to the second optical signal. The second processor controls the second optical component in response to the second electrical signal.
Patent CA-2291865-A1 (CA)
Title: Procede de mise en oeuvre d'une unite de service de trafic air
Inventor: RANDIMBIVOLOLONA FAMANTANANTSO
IPC: G08G5/00
Filed: 1999-12-07
Abstract: L'invention concerne un procédé de mise en oeuvre de l'unité de service de trafic air (ATSU) qui gère les liaisons entre certains équipements avion et les moyens de communications sol/bord, et dont le système d'exploitation (OS) gère les entrées/sorties, l'utilisation des ressources logicielles et matérielles, l'enchaînement et le cadencement des applications, qui sont des programmes réalisant des fonctionnalités du système avion, dans lequel on utilise des mécanismes de découpage de la mémoire, et des mécanismes de découpage de l'unité centrale ; dans lequel on filtre les appels au système d'exploitation de manière à interdire auxdites applications de type AOC (Airline Operational Communication) de perturber le fonctionnement de ladite unité de service de trafic air.
Patent CA-2300712-A1 (CA)
Inventor: GAUDRON PAUL
IPC: B25C1/08
Filed: 2000-03-10
Abstract: A powder actuated tool for driving a faster with combustion gases has an automatic reset. To use the device, the operator presses the device to the articles to be fastened, which requires overcoming the force of a spring in order to bring the working end where the fastener exits closer to the piston that rams the fastener.   When the device is fired, a charge releases combustion gases into a chamber, whereupon a piston in the chamber is rammed into the head of a fastener to be driven. After the device is fired, the operator releases the pressure, whereupon the spring releases the energy imparted by the operator and resets the device. The reset requires bringing the piston back into contact with the end of the combustion chamber from which the combustion gases entered; the reset is accomplished by a combination of a spring, which brings the chamber forward, and a stop in a fixed position with respect to a housing, which catches the piston and holds it in place until it is effectively driven back into the combustion chamber where it started.