baber/WOPTO huggingface dataset:
Patent CA-2289943-A1 (CA)
Title: Solid-phase nucleic acid isolation
Inventor: RUDI KNUT
IPC: C07H1/08
Filed: 1998-05-13
Abstract: The present invention provides a method of isolating nucleic acid from a sample of cells, said method comprising: (a) binding cells in said sample to a solid support to isolate cells from the sample; (b) lysing the isolated cells; and (c) binding nucleic acid released from said lysed cells to said same solid support and a kit for carrying out such a method. '1'he method may advantageously be used to prepare nucleic acid for use in a nucleic acid-based target cell detection method.
Patent CA-2291349-A1 (CA)
Title: A wireless communication system in which a base station controller routes packet data between roaming mobile units and a coupled packet data network
Inventor: MIZELL JERRY
IPC: H04L12/56
Filed: 1999-12-01
Abstract: A wireless communication system constructed according to the present invention includes at least one base station controller (BSC) that couples to a packet data network to service packet data communications between the packet data network and a mobile unit. The BSC is serviced by a mobile switching center (MSC) and services a plurality of base stations. The BSC includes circuitry that perform necessary interfacing functions to service the packet data communication requirements of the mobile unit. The mobile unit requests the wireless communication system to initiate this operation via a request made to a servicing base station. The base station forwards the request to the BSC which interacts with the MSC to initiate the packet data session. The BSC allocates a digital signal processor (DSP), processor and packet data network interface to service the packet data session for the mobile unit. The BSC thereafter sets up and services the packet data session through its connection to the servicing base station and its connection to the packet data network. Once this connection is established, the BSC continues to service the packet data session until it is terminated or until the mobile unit roams into a cell/sector serviced by another base station. Upon roaming of the mobile unit, operation will be altered. If the mobile unit roams to another cell or sector of a base station serviced by the same BSC, the path is only altered to include the newly servicing base station. However, if the mobile unit roams to a cell or sector serviced by another base station, the BSC must initiate mobility operations that will forward packet data communications to the newly servicing BSC for delivery to the mobile unit. By forwarding the packet data, the mobile unit maintains the same packet data network address.
Patent CA-2292677-A1 (CA)
Title: Data network call handling method
Inventor: GARVIN EUGENE DECLAN
IPC: H04Q3/62
Filed: 1999-12-17
Abstract: A voice call is carried between a calling party and a called party over a data network. During the call, the calling party or the called party can instruct the system to select an alternative routing for the call, and the system transfers, in response to the instruction, the call to the alternative routing. The alternative routing can be a switched network (PSTN) routing for the call. The alternative routing can be established before dropping the voice over data network call, such as by conferencing the new call, to provide a seamless handover. The instruction from the calling parties can be made by a key sequence.
Patent CA-2294361-A1 (CA)
Title: Procede de production d'hydrogene et d'energie electrique a partir du reformage de bio-ethanol
Inventor: VERYKIOS XENOPHON
IPC: H01M8/06
Filed: 1999-05-19
Abstract: Ce procédé de production d'hydrogène et d'énergie électrique, sans aucune émission de polluants, à partir d'éthanol obtenu à partir d'une biomasse, est caractérisé par l'oxydation/reformage partiel de l'éthanol au moyen d'eau, aux fins de production d'hydrogène, lequel est ensuite fourni à une pile à combustible pour produire de l'énergie électrique ; il est notamment caractérisé en ce qu'une solution aqueuse d'éthanol provenant de la fermentation d'une biomasse est séparée par distillation ou tout autre technique, de manière à contenir approximativement 40 à 70 % en poids d'éthanol, préférablement 50 à 60 %, ce mélange, mélangé à une quantité adéquate d'air de manière que le rapport molaire entre l'oxygène et l'éthanol soit compris entre zéro et 0,5, est fourni à un réacteur dans lequel s'effectuent des réactions d'oxydation et de reformage partiels de l'éthanol, sur un catalyseur approprié ; ce procédé est encore caractérisé en ce que la réaction de conversion catalytique et, le cas échéant, la réaction de combustion de CO ou sa conversion en CH¿4?, s'effectuent dans le même réacteur, ou dans un réacteur différent, en ce que le mélange gazeux sortant des réacteurs et contenant de l'hydrogène mélangé à du dioxyde de carbone, de l'azote, du méthane ou d'autres gaz en petites quantités, est séparé jusqu'à l'obtention du degré de séparation voulu pour une quelconque application.
Patent CA-2294837-A1 (CA)
Title: Hand-off based upon relative pilot signal strength
Inventor: JALALI AHMAD
IPC: H04W16/24
Filed: 1998-07-23
Abstract: A wireless communication system facilitates wireless communication with a mobile unit (112) within a respective service area. The wireless communication system includes a mobile switching center (102) and a plurality of base stations (104 and 106). Each base station (104) couples to the mobile switching center (102) and provides wireless communication within a respective cell or within a plurality of respective sectors. Each base station (104) provides a pilot signal that may be received by the wireless mobile unit (112). With multiple sectors, a pilot signal is provided for each sector. The mobile unit (112) may wirelessly connect to any of the base stations' cells and sectors. A determination of whether to be connected to a particular base station cell and/or base station sector is based upon the relative strengths of pilot signals received by the wireless mobile unit. The mobile unit (112) may evaluate the relative strengths of received pilot signals and simply request a connection to a base station or a disconnection therefrom based upon the evaluation. However, the mobile unit (112) may also notify the mobile switching center (102) of the strengths of received pilot signals with the mobile switching center (102) taking action. In such case, the mobile switching center (102) may determine thresholds and pass the thresholds to the mobile unit (112) for later use, the threshold based upon the relative strengths of the pilot signals. A corresponding method includes steps for operating a wireless communication system.
Patent CA-2295956-A1 (CA)
Inventor: OLLIVIER JEAN
IPC: C07C251/44
Filed: 1998-07-02
Abstract: The invention relates to a process for the preparation of cyclododecanone oxide consists in photochemically reacting cyclododecane, dissolved in chloroform, a nitrosating agent and hydrogen chloride in a virtually anhydrous medium, that is to say under conditions such that the water content in the reaction medium does not exceed 1000 ppm.
Patent CA-2297288-A1 (CA)
Inventor: GOODY STEVEN H
IPC: H04L12/56
Filed: 1998-08-04
Abstract: A method and apparatus in an optical network unit for identifying signals for a set of communication devices in a signal stream having signals for a number of different sets of communication devices. Each optical network unit ONU (335) includes a common control unit CCU (350) which uses a content addressable memory CAM for identifying sets of signals that need to be extracted from the signal stream and transmitted to a first set (392, 394, 396, 398) of communication devices; and identifying time periods for inserting sets of signals from a first set of communication devices into a signal stream.
Patent CA-2297716-A1 (CA)
Inventor: BATTAGIN ADRIAN A
IPC: H04N5/52
Filed: 2000-01-31
Abstract: An automatic gain control circuit for an optical receiver couples the low level signal produced by an optical detector to a signal amplifier, preferably a double-ended differential amplifier with the optical detector output fed into the high input and the low input coupled to ground, the gain of which is controlled by a negative feedback circuit. The feedback circuit comprises a signal level detection circuit coupled to the amplifier output, such as high-speed Schottky diodes acting in conjunction with an operational amplifier. The Schottky diodes are coupled to ground through AC coupling capacitors, and oriented in opposite directions, so when the amplified signal exceeds a conduction threshold of the Schottky diodes the capacitors are respectively charged and drained, establishing a voltage difference between the input terminals of the operational amplifier. The resulting current output from the operational amplifier to reduce the voltage difference is also fed to the gain control pin of the signal amplifier, reducing its gain. The differential output signal is equalized for transmission to switching, routing or processing equipment or to an HDTV receiver.
Patent CA-2297753-A1 (CA)
Inventor: CHU WAI-LAM ALEX
IPC: C07D493/04
Filed: 1998-07-24
Abstract: On décrit un procédé de traitement d'une infection microbienne. Le procédé consiste à administrer à un patient une composition pharmaceutique contenant un composé de formule (IA). Dans la formule (IA) chaque R représente indépendamment H, OH, Br, Cl, I, amino, thiol, nitro, alcoxy C¿1-4?, alcényloxy C¿1-4?, alcoxyalkylèneoxy C¿2-6?, alkylthio C¿1-4?, alkyle C¿3-18?, ou alcényle C¿3-18?; ou bien deux R adjacents forment ensemble une fraction bivalente C¿2-18? contenant au moins un atome d'oxygène, substituée ou disubstitué avec A ou B ou bien avec les deux, A représentant H, OH, Br, Cl, I, amino, ou thiol, et B représentant H, alkyle C¿1-10?, alcényle C¿2-18?, ou aryle C¿6-18?; à condition qu'au moins deux R ne représentent pas H; et à la condition que lorsque chacun des deux R représentent OH, alcoxy C¿1-4?, alcényloxy C¿1-4?, ou alcoxyalkylèneoxy C¿2-6?, et que X représente phényle substituté par deux subsituants indépendamment sélectionnés parmi OH, alcoxy, et alcényloxy, le R restant ne soit pas prényle; à condition que lorsque chacun des deux R représente OH, alcoxy C¿1-4?, alcényloxy C¿1-4?, ou alcoxyalkylèneoxy C¿2-6?, et que X est phényle substitué par trois substituants indépendamment sélectionnés parmi OH, alcoxy, et alcényloxy, le R restant ne soit pas prényle; à condition que lorsque chacun des deux R représentent OH, alcoxy C¿1-4?, alcényloxy C¿1-4? ou alcoxyalkylèneoxy C¿2-6?, et que X représente phényle substitué par un substituant prényle et par deux substituants additionels indépendamment sélectionnés parmi OH, alcoxy, et alcényloxy, le R restant ne soit pas H ou OH; à condition également que lorsque chacun des deux R représentent OH, alcoxy C¿1-4?, alcényloxy C¿1-4?, ou alcoxyalkylèneoxy C¿2-6?, et que X représente phényle substitué par un substituant contenant trois cycles et par deux substituants aditionnels indépendamment sélectionnés parmi OH, alcoxy et alcényloxy, le R restant ne puisse être prényle. X représente alkyle C¿4-10?, alcényle C¿4-20? ou une fraction de cycle simple C¿4-20?, ponté C¿6-20? ou fusioné C¿6-20? contenant cycloakyle, cycloalcényle, aryle, hétérocycle ouhétéroaryle, ou X est substitué par H, OH, Cl, Br, I, amino, cyano, alkyle, alcoxy, alcényle, ou alcényloxy; à condition que, si X représente une fraction hétéroaryle ou hétérocyclique dans laquelle deux R représentent chacun OH, et sont méta l'un par rapport à l'autre, alors le R restant représente H et est ortho par rapport à chacun des deux hydroxyles, et Y et Z représentent chacun O, et un atome de cycle de X est lié directement à l'atome de carbone sp?2¿ adjacent à X, puis est substitué par H, OH, Cl, Br, I, amino, cyano, alkyl, alkoxy, alcényle, ou alcényloxy; et Y et Z sont chacun indépendamment sélectionés parmi O, S, et NH. Cette invention concerne un composé de formule (IA) ou un sel pharmaceutiquement acceptable ou un ester de ce dernier.
Patent CA-2297944-A1 (CA)
Inventor: YANG ZHENHUA
IPC: C07C59/01
Filed: 2000-02-07
Abstract: Anticancer activity of the branched chain fatty acids comes from iso- or anteiso-terminally branched groups. The method of making their derivatives with even greater activity, stability, water-soluability, readily absorbability.
Patent CA-2297979-A1 (CA)
Inventor: DIAS CLIVE
IPC: H01R13/703
Filed: 1999-06-04
Abstract: A modular terminal block (14) for connection between an electrical distribution system and the processing circuitry (26) of a protective relay.  The terminal block includes multiple tiers (18), each of which is provided with a set of terminal connections (12) and signal contacts (20). The tiers (18) are of different lengths such that each set of terminal connections are located at different distances from the protective relay to improve accessibility. The terminal block can be mounted in different orientations, and allow shorting between any two adjacent terminal connections.
Patent CA-2300808-A1 (CA)
Inventor: MAIENFISCH PETER
IPC: C07D213/61
Filed: 1998-08-14
Abstract: The invention relates to a method for producing an organic compound of formula (I) and optionally its E/Z-isomers, E/Z-isomer mixtures and/or tautomers, each in free or salt form, R1 representing hydrogen or C1-C4 alkyl, R2 representing hydrogen, C1-C6 alkyl, C3-C6 cycloalkyl or a radical -CH2B, Het representing an unsubstituted or substituted heterocyclic radical and B representing phenyl, 3-pyridyl or thiazolyl, these being optionally substituted. The invention is characterised in that a compound of formula (IIa) Q-A-Q, wherein A represents a direct bond or an organic radical, or of formula (IIb), wherein U represents an organic radical, Q representing (1) in the compounds (IIa) and (IIb) and R1, R2 and Het having the meaning given above for formula (I), and optionally their E/Z-isomers, E/Z-isomer mixtures and/or tautomers, each in free or salt form are hydrolysed. The invention also relates to a method for producing compounds of formulae (IIa), (IIb), (IIIa) and (IIIb), and to a method for combating pests with compounds of formulae (IIa) and (IIb).
Patent CA-2301359-A1 (CA)
Title: Trailer floor cleaning system
Inventor: SHELBY DAVID E
IPC: B08B1/00
Filed: 2000-03-20
Abstract: A system for cleaning the floor of a self unloading trailer of residual particulate material comprises in combination with moving slats of a typical self unloading trailer three rails each fashioned to be attached to the top of a slat, and a wedge-shaped sweeper having skates on a lower portion to ride along said rails. The sweeper rides along the rails by means of skate assemblies having pawls which may ratcheting along teeth formed in the rails as the sweeper moves rearwardly in the trailer. A control system sends signals to a motor contained within the sweeper to engage and disengage the pawls, and to a winch to draw the sweeper back to a starting position following operation.
Patent CA-2303710-A1 (CA)
Title: Straight hole drilling system
Inventor: YAO JAMES JING
IPC: E21B17/00
Filed: 1997-12-05
Abstract: A drill rod for a drill string has a thread at each end and is connected t an adjacent rod by a sleeve. The threads on the sleeve and rod are configured to reduce stress concentrations and provide sacrificial wear on the sleeve. The thread has a single start with a part circular root and the wear volume on the sleeve is less than that on the rod. The outer diameter of the rod is at least twice that of the inner bore.
Patent CA-2304365-A1 (CA)
Title: Anticorps catalytiques et leur mode de production
Inventor: SUESS GABRIELE MARIA
IPC: C07K16/18
Filed: 1998-09-18
Abstract: L'invention concerne de manière générale un précurseur du facteur de croissance et son utilisation pour produire sélectivement des anticorps catalytiques spécifiques d'antigène. Afin de produire ces anticorps catalytiques, on active des lymphocytes B et on induit leur prolifération par les produits du clivage catalytique d'une partie antigène cible du précurseur du facteur de croissance de la présente invention. Une forme particulièrement utile dudit précurseur est un vaccin qui renferme des molécules d'acide nucléique et qui, de préférence, contient également un adjuvant moléculaire. Un autre aspect de l'invention concerne un précurseur du facteur de croissance se présentant sous forme multimère. Le précurseur du facteur de croissance de la présente invention est utile pour générer des anticorps catalytiques à des fins thérapeutiques, diagnostiques et industrielles.
Patent CA-2304659-A1 (CA)
Title: Apparatus for moving over uneven terrain
Inventor: DVORKIN VLADIMIR
IPC: B62D57/036
Filed: 1998-09-23
Abstract: Apparatus (100) for moving over uneven terrain (102) including a support element (17), a pair of cams (5, 5') rotatingly attached to the support element (17), wherein one of the cams (5, 5') is shaped as the mirror-image of the other cam, a pair of runners (1, 1') each having a terrain contacting surface (90) and a cam/runner contacting surface (2, 3), and a pair of lifters (108, 108') each connected to one of the runners (1, 1'), each lifter (108, 108') having a cam/lifter contacting surface (2', 3'), the runners (1, 1') and the lifters (108, 108') being alternatively moved by the cams (5, 5'), wherein when one of the cams (5, 5') contacts the cam/runner contacting surface (2, 3) of one of the runners (1, 1'), the terrain contacting surface (90) of the runner (1, 1') contacts a terrain (102) thereby causing the apparatus to move in a direction of travel, while simultaneously the other cam (5, 5') contacts the cam/lifter contacting surface (2', 3') and lifts the lifter (108, 108') away from the terrain (102), thereby also lifting the other runner (1, 1') away from the terrain (102), and vice versa, such that the runners (1, 1') move along the terrain (102) by alternately contacting the terrain (102).
Patent CA-2305844-A1 (CA)
Title: Connection structure for miniature light string
Inventor: WANG JUNG KUEI
IPC: F21S4/10
Filed: 2000-04-13
Abstract: This present invention relates to a connection structure for a miniature light string. It mainly comprises a miniature light bulb seated in a holder that is further accommodated in a socket with electrical connection wires attached thereon. The socket is provided on a side thereof with a connection structure, which is capable of hooking the electrical wire to obtain a secure connection therebetween in order that the bulbs can be arranged along with the wire and the whole bulb assembly is connected with the wire firmly.
Patent CA-2307880-A1 (CA)
Title: Discrete element light modulating microstructure devices
Inventor: ROMANOVSKY ALEXANDER B
IPC: H04Q11/00
Filed: 1998-10-27
Abstract: A light modulating or switching array (10) having a plurality of discrete protrusions (16) formed of electro-optic material, each of which is electrically and optically isolated from each other. The protrusions (16) have defined a top face (20), a bottom face (30), first and second side faces (22, 24), and front and back faces (26, 28). There is a plurality of electrodes (34) associated with each of the protrusions (16), these electrodes (34) being capable of inducing an electric field in the electro-optic material for independently modulating a plurality of light beams which are incident upon one of the faces (20, 22, 24, 26, 28, 30) of the protrusions (16). The electrooptic material may be of PLZT, or a member of any of the groups of electrooptic crystals, polycrystalline electro-optic ceramics, electro-optic semiconductors, electro-optic glasses and electro-optically active polymers. Also disclosed is a light modulating array (10) of the type having a matrix (136) of electro-optic material which contains a plurality of embedded adjacent electrodes (134). These electrodes (134) are capable of inducing an electric field in the electro-optic material for independently modulating a plurality of light beams which are incident upon the matrix (136) of electrooptic material. This matrix (136) can be formed by a variety of processes, including a sol-gel process. Additionally disclosed is a system (11) in which light modulating arrays (10) are used to modulate incident light beams (42) and separate them into a plurality of data channels (94, 96).
Patent CA-2308395-A1 (CA)
Title: Purification of .alpha.-acids and .beta.-acids
Inventor: REFLING JAY R
IPC: C12C3/08
Filed: 1998-11-12
Abstract: Unsaturated organic compounds, in particular .alpha.-acids and .beta.-acids, are purified prior to hydrogenation by mixing them with an adsorbent capable of adsorbing catalyst poisons, preferably activated carbon, and separating the adsorbent containing the catalyst poisons to recover the thus purified unsaturated organic compounds. A significant reduction in the use of hydrogenation catalyst is realized.
Patent CA-2310291-A1 (CA)
Title: Exhaust gas muffler for internal combustion engines
Inventor: DUERR BERNHARD
IPC: F01N13/18
Filed: 2000-05-30
Abstract: An exhaust gas muffler is provided for an internal combustion engine, especially for two-stroke engines of manually guided implements such as power chain saws, brush cutters or the like. The muffler has a housing that includes two shells. One of the shells is provided with at least one outlet opening for exhaust gas. A cover is provided that guides the exhaust gas, and the cover has at least one discharge opening for the discharge of exhaust gas to the surrounding air. An exhaust gas chamber is formed within the cover. A screen element is disposed in the vicinity of the at least one discharge opening such that the exhaust gas stream is guided through the screen element.
Patent CA-2310782-A1 (CA)
Title: Methods of nucleic acid isolation
Inventor: SOMAK RALPH
IPC: C12Q1/68
Filed: 1998-12-09
Abstract: The invention relates to new methods of RNA isolation that exploit the surprising discovery that RNA may be differentially precipitated from DNA. The subject methods result in the formation of an RNA-containing precipitate that has an RNA content at least two fold enriched with respect to DNA, as compared with the RNA to DNA ratio of the solution from which the RNA-containing precipitate is derived. By precipitating RNA from a solution, the RNA may be collected by simple procedures such as centrifugation or filtration, thereby avoiding the need to bind the RNA to solid phase. Preferred precipitate forming chaotropic salts are guanidine hydrochlore and guanidine thiocyanate.
Patent CA-2311744-A1 (CA)
Title: A method of managing objects and parameter values associated with the objects within a simulation model
Inventor: BANGS ALEX L
IPC: G06F9/44
Filed: 1998-10-23
Abstract: A method of managing objects within the simulation model commences with the storage of a first value for a particular parameter within an object of the simulation model. A panel is then displayed within the user interface. The relevant parameter of the above-identified object may then be identified for inclusion within this panel. In response to the identification of the parameter, an identifier (such as an icon) associated with the parameter is displayed within the panel. A second value for the relevant parameter of the object may then be inputted by a user via the panel. The second value for the parameter is then stored separately from the first value for the parameter, and these first and second values can be selectively applied to the parameter.
Patent CA-2312621-A1 (CA)
Inventor: VASQUEZ TITO
IPC: C09K8/58
Filed: 2000-06-28
Abstract: A process for in situ upgrading of a heavy hydrocarbon includes the steps of (a) positioning a well in a reservoir containing a heavy hydrocarbon having an initial API gravity of less than or equal to about 8; (b) injecting d light solvent into the well at reservoir conditions so as to provide an upgraded hydrocarbon in the reservoir, the upgraded hydrocarbon having an improved API gravity greater than the initial API gravity; and (c) producing the upgraded hydrocarbon from the well.