baber/WOPTO huggingface dataset:
Patent CA-2241705-A1 (CA)
Inventor: MENEZES ALFRED J
IPC: H04L9/08
Filed: 1998-06-26
Abstract: A key agreement protocol for preventing key-share attacks wherein a method is provided for establishing a common shared key between a pair of correspondents in a station -to-station protocol by exchanging messages between the correspondents and including identification information in said messages, said information being identifiable to one or other of said correspondents to thereby establish said common key.
Patent CA-2242520-A1 (CA)
Inventor: LANGKJAER CARSTEN
IPC: G01S15/10
Filed: 1997-01-29
Abstract: A method of measuring the height of the cutting table of an agricultural implement relative to a surface of the ground with crops by means of an acoustic transducer (2). The sound signal emitted by the transducer (2) is formed by a pseudonoise signal covering a predetermined frequency band. The sound signal is compared with the reflected signal, and the signals are mutually delayed until the comparison has reached its optimum. The delay represents then a measurement of the distance to the surface of the ground. In this manner only the signals originating from the reflection from the surface of the ground are measured, as it is utilized that these signals must present substantially the same pattern as the emitted signals. In this manner the picking up of even weak signals has been facilitated, whether these signals are weak or not compared to strong interference signals.
Patent CA-2243071-A1 (CA)
Title: Method and apparatus for the deacidification of library materials
Inventor: BURD JAMES E
IPC: D21H25/18
Filed: 1997-01-16
Abstract: A method and apparatus (10) are provided for deacidifying cellulose based materials (60), especially books, magazines, and other bound or folded cellulose materials having a spine (62). The method includes contacting the materials with a treating medium and producing relative movement at a predetermined velocity between the materials (60) and the treating medium in a direction generally parallel to the spine (62) of the materials (60) and, preferably simultaneously, directing the treating medium by means of a spray toward the materials (60) in a direction generally perpendicular to the spine (62) of the material (60) for a period of time effective for the treating medium to contact substantially all of the material (60). Following treatment, any excess treating medium is removed from the material (60) and directing any such removed treating medium to a holding tank (72) for reuse later. The movement in a parallel direction is achieved by reciprocating the materials (60) through a tank (12) filled with treating medium. In addition, the materials (60) may be rotated about a central axis of the treatment tank (12). The preferred embodiment of the present invention includes an apparatus (10) consisting of a treating tank (12) for containing the treating medium, a plurality of material holders (40) disposed in the tank on a reciprocatable and rotatable shaft (30), and spray nozzles (50) for producing the perpendicular movement of the treating medium relative to the spine (62) of the material (60).
Patent CA-2243849-A1 (CA)
Title: Inhibiteurs de la farnesyl-proteine transferase
Inventor: DINSMORE CHRISTOPHER J
IPC: C07D239/26
Filed: 1997-01-27
Abstract: Composés qui inhibent la farnésyl-protéine transférase (FTase) et la farnésylation du Ras protéique oncogène. L'invention porte également sur des compositions chimiothérapeutiques renfermant des composés de cette invention et sur des méthodes d'inhibition de la farnésyl-protéine transférase et de la farnésylation du Ras protéique oncogène.
Patent CA-2247721-A1 (CA)
Title: Improved hover vacuum cleaner
Inventor: ROONEY MICHAEL JOSEPH
IPC: A47L7/06
Filed: 1998-09-18
Abstract: A hover vacuum cleaner has a casing, an underside to the casing, an impeller and drive motor for the impeller, a dust filter, an inlet for dust laden air, an exhaust port in the, a pathway for air to pass from the inlet, through the dust filter and impeller and around the motor, and through the exhaust port. The underside has dished air chambers, covering a substantial area of the underside. Preferably, the underside has at least two dished air chambers, each of which straddles the longitudinal axis of the underside. Adjacent dished air chambers are separated by a dam which is transverse to the longitudinal axis. The exhaust port is in direct fluid communication with one of the dished air chambers and the exhaust port also straddles the longitudinal axis. The underside has a peripheral groove which is in fluid communication with the exhaust port and/or the adjacent air chamber.
Patent CA-2247731-A1 (CA)
Title: A method for producing cellulose particles
Inventor: SPEDDING JEFFREY F
IPC: C08L1/06
Filed: 1998-09-22
Abstract: A method for producing cellulose particles whereby a cellulose solution is dispersed in a regenerant or nonsolvent and the cellulose is regenerated or pre-cipitated in dispersed form into cellulose particles.
Patent CA-2248328-A1 (CA)
Inventor: MUELLER RICHARD L
IPC: A61M25/092
Filed: 1998-09-22
Abstract: A steerable percutaneous catheter for guiding at least one functional device to selected surfaces of a body for treatment thereon, particularly adapted for laser-assisted percutaneous transluminal revascularization (PTMR). The steerable catheter has a handle portion at its proximal end and a controllably deflectable end portion at its distal end. The distal end of the catheter and the distal end of the functional device maintain alignment automatically during deflection. The invention also includes a surface contact detection system to detect contact with an interior body surface, such as the heart wall.
Patent CA-2248492-A1 (CA)
Title: Silica glass composition and method for manufacturing silica glass using the same
Inventor: YOON YOUNG-SIK
IPC: C03C6/00
Filed: 1998-09-30
Abstract: A silica glass composition and a method for manufacturing silica glass using the same are provided. The silica glass composition includes pyrogenetic silica having an average particle diameter of 5X10 -3 to 1x10 -1 µm and a specific surface area of 50 to 400 m2/g; and heat-treated silica as an agglomerate of the pyrogenetic silica, having an average diameter of 2 to 15 µm and a specific surface area less than that of the pyrogenetic silica. A high purity silica glass tube, in which cracking after drying scarcely occur and shrinking ratio is remarkably decreased, can be obtained by using the silica glass composition according to the present invention. Also, a large silica glass tube can be manufactured by using the composition.
Patent CA-2249876-A1 (CA)
Title: Token drop
Inventor: WARREN DAVID
IPC: G07D11/00
Filed: 1998-10-08
Abstract: A device for dropping tokens into a drop box. The device may be used on a gaming table over a drop box. The device has a base, which is mounted on a surface, and a door, which is movably connected to the base. The door swings open to allow tokens, coins, chips, etc., to drop through the base into a drop box below. The door also allows the tokens, coins, chips, etc, to rest so that they may seen before being dropped into the drop box.  This device is particularly useful on poker tables, where the casino takes a cut of the winnings.
Patent CA-2249917-A1 (CA)
Title: Cable assembly for rear seat release lock-out system
Inventor: VAN ZANTEN DAVID A
IPC: E05F11/04
Filed: 1998-10-09
Abstract: A cable assembly secured inside the trunk compartment of a motor vehicle having dual actuator cables. The cable assembly includes a housing, a pulley member rotatably mounted to the housing and a slide lock member. A first actuator cable slidingly cooperates through the housing and pulley member with one end attached to a pull-strap inside the trunk compartment and the second end attached to a release latch. A second actuator cable has one end attached to a pull-strap located in the proximity of the driver's seat and the second end attached to the pulley member to rotate the pulley member upon pulling the pull-strap. Rotating the pulley member allows the pulley member to engage a ball slug on the first actuator cable to drive the second end and actuate the release latch. A slide lock member is capable of engaging the pulley member to prevent rotation, and therefore, prevent the pull strap in the passenger compartment from actuating the release latch.
Patent CA-2251294-A1 (CA)
Title: Glass compositions having high ki values and fibers therefrom
Inventor: MATTSON STEPHANIE M
IPC: C03C13/00
Filed: 1997-04-18
Abstract: A fiberizable glass composition which has a KI value  40, while possessing acceptable processing properties such as viscosity and liquidus temperatures is provided. The glass composition processes well in the furnace with acceptably low levels of foaming and is readily fiberizable. The glass has a high boron content, a high soda content, and contains only small amounts of alumina. Further, the glass contains small amounts of barium sulfate which improves the durability of the glass fibers in use.
Patent CA-2251336-A1 (CA)
Inventor: O'DONNELL MATTHEW
IPC: G01N29/06
Filed: 1997-03-21
Abstract: A method and system for 3-D acoustic microscopy using short pulse laser excitation comprising a sample or object under investigation (12) is optometric acoustically coupled to a transducer (14) which includes optically absorbing and reflecting materials. Optical detection is utilized by way of a focused excitation beam (19) scanned by an acoustically optometric scanning device (23) across an absorbing layer of an optometric acoustic transducer (14) coupled to an object under investigation to create spherical ultrasonic waves within the object which may be living tissue. The reflected spherical ultrasonic waves are detected through the use of an unfocused probe beam and an optical detector array or a focused probe beam (21) and a single photo-detector (20) which receive the probe beam from a reflecting surface of the optometric acoustic transducer.
Patent CA-2253977-A1 (CA)
Inventor: BERNEGGER-EGLI CHRISTINE
IPC: C12N1/21
Filed: 1997-05-30
Abstract: The invention relates to novel micro-organisms which are capable of utilising cyclopentene derivatives of the general formula (VII), in which R1 is C1-C4-alkyl, C1-C4-alkoxy, aryl or aryloxy, as the only nitrogen source, as the only carbon source or as the only carbon and oxygen source. The invention also relates to novel enzymes which hydrolyse the cyclopentene derivatives of the general formula (VII).  Furthermore, the invention relates to a novel process for the preparation of (1R,4S) or (1S,4R)-1-amino-4(hydroxymethyl)-2-cyclopentene of the formulas (I) and (II) and/or of a (1S,4R) or (1R,4S)-amino-alcohol derivative of the general formulas (III) and (IV), in which R1 has the above meaning.
Patent CA-2254453-A1 (CA)
Title: Control of telemetry interface gateway during a voice call
Inventor: GARLAND STUART MANDEL
IPC: H04Q9/00
Filed: 1998-11-25
Abstract: Relates to apparatus and methods for permitting an agent of a utility or service bureau to access customer metering equipment before or during a conversation with the customer.   For accessing before a call, while the customer is still on-hook,  an alert signal is sent to activate  the  telemetering equipment  prior  to  establishing  a voice connection.   For accessing during the call, an alert signal is sent while the customer is off-hook. Advantageously , measurement can be made in conjunction with the oral  contact with the customer,  thus making customer contacts more efficient and providing better service to customers.
Patent CA-2254517-A1 (CA)
Inventor: BOUCHARD MICHEL
IPC: E04B2/02
Filed: 1998-11-26
Abstract: A manually breakable block comprising a first block component, a second block component and a manually breakable bridging means connecting the first block component to the second block component. The manually breakable bridging means is manually breakable so as to separate the first block component and the second block component by application of a manual levering action on one block component relative to the other block component. The manually breakable block of the present invention may be manually broken into at least two block components which may be used to build structures such as walls or the like.
Patent CA-2258260-A1 (CA)
Inventor: PRICE ALISTAIR JOHN
IPC: H01L31/02
Filed: 1997-06-06
Abstract: A photodetector circuit comprising an avalanche photodiode having a signal input for receiving an input optical signal to be converted to an electrical signal. The photodetector circuit further includes biasing circuitry, coupled to the avalanche photodiode, for applying a bias voltage to the avalanche diode. The bias circuitry includes: (1) a dc bias circuit for providing a dc component to the bias voltage for maintaining the avalanche diode in a stable avalanche gain condition when receiving the input optical signal; and (2) a modulating circuit for providing a high frequency modulating component to the bias voltage for modulating the bias voltage in a manner that enhances the operational characteristics of the avalanche photodiode. In particular, the modulating component to the bias voltage decreases the noise of the signal output of the avalanche photodiode for a given average gain, and increases the bandwidth of the signal output of the avalanche photodiode for a given average gain.
Patent CA-2258451-A1 (CA)
Title: Liquid-cooled casting die
Inventor: HORNSCHEMEYER WOLFGANG
IPC: B22D11/04
Filed: 1999-01-13
Abstract: A liquid-cooled casting die for the continuous casting of thin steel slabs has a molding casting die body made of a material of high heat conductivity, such as copper or a copper alloy. Preferably the casting die body is made, in each case, of two broad-side walls, situated facing each other, and narrow-side walls limiting the width of the billet, the broadside walls forming a funnel-shaped pouring-an area. In order to avoid the formation of cracks in the thermally and mechanically more stressed areas of the copper plate, cooling zones are arranged particularly in the bath surface area having higher surface- related heat flow.
Patent CA-2258549-A1 (CA)
Inventor: MEISSNER RUPRECHT
IPC: B01J32/00
Filed: 1997-06-17
Abstract: Catalyseur contenant en tant que matériau de support un .alpha.-oxyde d'aluminium et en tant que composant actif, du cuivre. La surface BET (déterminée conformément à la norme DIN 66131) de l'oxyde d'aluminium est égale ou supérieure à 30 m?2¿/g. L'invention concerne également un procédé de production de ce catalyseur et l'utilisation de ce dernier pour la déshydrogénation du cyclohexanol en cyclohexanone. L'invention porte en outre sur l'utilisation d'.alpha.-oxyde d'aluminium dont la surface BET (selon DIN 66131) est égale ou supérieure à 30 m?2¿/g, pour la production d'un catalyseur.
Patent CA-2263563-A1 (CA)
Title: Cyclopentenones, process for preparing the same, and the use thereof
Inventor: WU HUA-KANG
IPC: A23L1/30
Filed: 1997-09-01
Abstract: A process for preparing 4,5-dihydroxy-2-cyclopenten-1-one represented by formula (1), characterized by heat-treating at least one member selected among: (a) uronic acids or uronic acid derivatives; (b) sugar compounds containing uronic acids and/or uronic acid derivatives; and (c) sugar compoundcontaining materials containing uronic acids and/or uronic acid derivatives.
Patent CA-2263752-A1 (CA)
Title: Compositions destinees au revetement de matieres en feuilles
Inventor: TOIVONEN HANNU OLAVI ENSIO
IPC: B01D1/00
Filed: 1997-08-04
Abstract: L'invention concerne un procédé de traitement et d'utilisation d'une composition de revêtement aqueuse comprenant différentes étapes consistant à: a) concentrer la composition afin d'augmenter sa teneur en solides, et b) utiliser la composition concentrée pour recouvrir une feuille, comme par exemple, du papier, dans laquelle l'étape de concentration (a) est effectuée par évaporation thermique sous pression réduite. La composition concentrée peut être une composition de revêtement déjà utilisée et qui a été récupérée ou alors, il peut s'agir d'une nouvelle composition de revêtement.
Patent CA-2264435-A1 (CA)
Title: Limiting electrical degradation of all-dielectric self supporting cables
Inventor: LANG IAN DEWI
IPC: H02G7/05
Filed: 1999-03-03
Abstract: A device 22 for use adjacent an earthed suspension region 20 of an all-dielectric self-supporting cable 10 suspended in an electric field at the region 20 from a tower or the like for limiting dry band arcing adjacent the region is disclosed. The device comprises members 34, 36 for defining a sleeve 26 for fitting to the cable adjacent this region 20 and elements 38, 40, 42, 44 for defining two closures 28, 30 for the sleeve. These closures are engageable with the cable at longitudinally spaced apart locations for forming with the cable and sleeve a closed zone 32 between the closures. Use of the device maintains the outer surface of the cable dry over a portion 24 thereof adjacent the region 20 which would otherwise be susceptible to dry band arcing.
Patent CA-2265404-A1 (CA)
Title: Encapsulated magnet for magnetic drive pumps
Inventor: PIETERS FERDINANDUS A
IPC: H02K5/132
Filed: 1999-03-17
Abstract: An encapsulated magnet assembly has a magnet encapsulated during a two-step molding process. The first step includes molding a first molded section over a magnet assembly. The second step of the process includes molding a second molded section over the magnet and the first molded section in such a manner that the entire magnet is covered by the two molded sections completely. A first parting line is defined between the first and second molded sections along an elongate tapered section of the first molded section at the one end of the assembly. A second parting line is defined between the first and second molded sections at a dovetail on the first molded section. An outwardly tapered surface is provided on the dovetail. The two parting lines define leak-free seams between the two molded sections thereby sealingly encapsulating the magnet within the two molded sections.
Patent CA-2266220-A1 (CA)
Inventor: NYE MARK
IPC: E04G23/08
Filed: 1999-03-22
Abstract: A construction vehicle attachment in the form of a pulverizer-ripper unit that includes a pair of jaws confronting and closing on one another and an independent ripper-shank that has a replaceable ripper-tooth. Each jaw includes teeth that serve to engage and fracture concrete slabs. The pulverizer-ripper unit operates under power of any one or a combination of hydraulic, pneumatic, electric, or mechanical powers. The teeth on each jaw are alternated at differing lengths and sizes. The ripper-shank is an elongated finger-like projection pivotably mounted on one of the jaws. The ripper-shank is significantly longer than either jaw and has a range of arcuate motion from a parked-position to a fully-deployed-position with at least two intermediate positions therebetween. The ripper-shank can be locked into such an intermediate position and allows an operator to initially rip up or pry up surfaces, sort and properly orient large chunks, and then subsequently pulverize the chunks with the jaws.
Patent CA-2267863-A1 (CA)
Inventor: BENNETT JEFFREY SCOTT
IPC: G01P15/18
Filed: 1997-10-16
Abstract: A vehicle crash sensing system for making omnidirectional acceleration measurements comprises 1) an assembly (26) of at least three preferably self-testable accelerometers (10, 12, 14) mounted in an array on a substantially common plane (16) with axes (18, 20, 22) both skewed relative to one another and intersecting a region near a point, and 2) an electronic control module (30). The accelerometer signals (A, B, C) provide a redundant measure of the associated acceleration vector (R). The magnitudes of components for associated acceleration basis vectors are calculated from the accelerometer signals (A, B, C) and used in the detection of crashes for associated safety restraint systems (801, 802, 803, 804). Algorithms (500, 600, 700) in the electronic control module remove accelerometer offset, determine if the acceleration measurements are self-consistent whereby the measurement of acceleration from one accelerometer is consistent with a corresponding estimate thereof based upon measurements of acceleration from the other accelerometers, control self-testing, detect crashes using only self-consistent acceleration measurements, and activate associated safety restraint systems (801, 802, 803, 804) as appropriate.
Patent CA-2275956-A1 (CA)
Title: System for communicating by remote interrogating for transmitting inhibiting commands
Inventor: LEDUC MICHEL
IPC: G06K17/00
Filed: 1997-12-24
Abstract: The invention concerns a communication system between an interrogating transceiver and a plurality of transponders. This system enables the interrogating device to send to the transponders inhibiting commands without modifying the data contained in their memory. The invention more particularly concerns a communication system between an interrogating transceiver, capable of transmitting an energy field and at least a transponder comprising an integrated circuit including a memory, characterised in that in response to the initialisation, the transponder sends a message (ATR) carrying in particular an information (MOD) characteristic of its inhibiting mode and an information (RR) defining the duration of stand-by intervals (PV) between two messages during which the interrogating device is capable of sending one or several inhibiting commands according to the inscribed mode (MOD).
Patent CA-2277625-A1 (CA)
Inventor: UBALDI MARIA CHIARA
IPC: G06E1/02
Filed: 1999-07-16
Abstract: An optical device for processing an input optical serial sequence of phase-modulated N-bits having a predetermined one-bit time slot in order to compare said input optical serial sequence of phase-modulated N-bits with a predetermined sequence of N-bits, said device comprising a) input means for said input optical serial sequence of phase-modulated N-bits; b) a first optical element for converting said input optical serial sequence of phase-modulated N-bits into an optical parallel pattern of phase-modulated N-bits carrying the same information as said input optical serial sequence of phase-modulated N-bits; c) a second optical element capable of causing a phase delay of at least one bit of said optical parallel pattern, said phase delay having a preselected value depending on said predetermined N-bits sequence.
Patent CA-2278293-A1 (CA)
Inventor: FISCH MICHAEL
IPC: C09K19/38
Filed: 1998-01-21
Abstract: The present invention consists of materials and a processing method for coating rigid-rod poly(ionomers) or salts thereof, in a solvent system, directionally on charged surfaces resulting in the formation of liquid crystal display surfaces with planar alignment and pretilt.
Patent CA-2279092-A1 (CA)
Title: Method and system for conducting reverse index scans
Inventor: MCARTHUR CATHERINE S
IPC: G06F17/30
Filed: 1999-07-29
Abstract: A method executed by a data processor for scanning a reverse range. The scan is conducted in an index for a table having an upper end and a lower end. The reverse range has a start key value for defining the reverse range, and the index has a set of keys representing a set of records and record attributes in the table. Each key in the set of keys has a RID designating a record in the table and a key value corresponding to an attribute of the record in the table. The method includes the steps of searching the index for a start key, selecting an upper bound of the reverse range, and, if the upper bound is the first key in the index, indicating that the index does not contain any key value within the reverse range, or, if the upper bound is not the first key in the index, then fetching each key below the upper bound in the index.