baber/WOPTO huggingface dataset:
Patent CA-2249868-C (CA)
Inventor: CHUAH MOOI CHOO
IPC: H04B7/005
Filed: 1998-10-08
Granted: 2002-12-10
Abstract: The power level for uplink data transmission in a wireless communications network utilizing an on-demand multiple access method with a fair queuing service discipline (ODMAFQ) for efficient utilization of the limited bandwidth available in the wireless network is established during the initial access request message. The power level in a wireless network having a base station and several remote hosts is established by first transmitting a short connection request message to the base station from one of the remote hosts at an initial power level that is set relative to the nominal open loop power level. If the first remote host's transmission is unsuccessful, the power level is incremented by a power increment amount that may be predetermined, and the steps of transmitting and incrementing are repeated until the transmission from remote host to base station is successful. Finally, the power level at which transmission is successful is stored and used for further data transmission between that particular remote host and the wireless network base station.
Patent CA-2249877-C (CA)
Title: Fast frequency hopping spread spectrum for code division multiple access communications networks (ffh-cdma)
Inventor: RUSCH LESLIE ANN
IPC: H04B1/713
Filed: 1998-10-08
Granted: 2008-04-01
Abstract: An improved method and apparatus for optical and radio frequency implementation of a fast frequency hopping spread spectrum communication for code division multiple access systems is disclosed. The method avoids the frequency hopping synthesizer requirements in the transmitter as well as in the receiver. In a system where a pool of CDMA users share a channel characterized by a number of F  available frequencies (or frequency bands), each user is assigned a subset of M (M less than or equal to F) frequencies from the F available frequencies, selected and ordered in time as prescribed by his own code (or address). In the transmitter, the information bit sequence modulates a broadband source so that the energy assigned to a data bit is concentrated on just a short interval of the bit period which is less than or equal to the so-called chip interval. The data modulated signal enters equipment which simultaneously or sequentially performs three functions: 1) spectral slicing of the input signal into chip pulses, 2) a chip-pulse modulation and 3) a chip-pulse delaying.  The output is an FFHSS signal composed from M    sub--pulses (or chip-pulses), each of which is centered at different frequency and ordered in time as fixed by the FFH code. In an optical implementation, a broadband source and a set of in-line fiber Bragg gratings performs the FFHSS encoding and decoding operations with ASK chip-modulation. The gratings can be tuned to allow the programmability of the encoding/decoding system.
Patent CA-2250302-C (CA)
Inventor: TAYLOR DAVID
IPC: E06C7/42
Filed: 1998-10-13
Granted: 2006-02-07
Abstract: The invention which is the subject of this application relates to a device for use in stabilising the position of a ladder on a surface when in an in use position. The device comprises a series of members which engaged at a plurality of locations on the ladder rungs so as to effect a movement of the centre of the gravity towards the wall or other vertical structure against which the ladder is leant, to reduce the susceptibility of the ladder to slip. The device can be collapsible to enable the same to be stored and moved more easily from site to site.
Patent CA-2255642-C (CA)
Inventor: PANZERI EZIO
IPC: G07D5/10
Filed: 1997-05-17
Granted: 2008-04-01
Abstract: A method of coin testing is provided in which a laser beam (13) is directed onto a face of a coin (4) and a laser detector (3) is used to detect where the laser beam is intercepted by the coin and where the laser beam is not intercepted by the coin, so as to obtain an indication of a characteristic of the face of the coin. The characteristic of the coin is used to identify the coin. The invention also relates to an apparatus for coin testing, which comprises a laser source (11) to direct a laser beam (13) onto a face of a coin (4), a laser detector (3) for detecting where the laser is intercepted by the coin and where the laser is not intercepted by the coin, and a signal-processor (14) which obtains an indication, from an output of the laser detector (3), of a characteristic of the face of the coin which is used to identify the coin.
Patent CA-2256197-C (CA)
Inventor: QUACCHIA MARCO
IPC: H04N17/00
Filed: 1998-12-15
Granted: 2002-07-09
Abstract: A  method  and  an  apparatus  are  provided  for introducing reference impairments into pictures to be used in subjective tests on digital video signals, in compliance with ITU-T Recommendation P.930.   The method generates blockiness distortion and/or edge busyness distortion.  For the first distortion,  areas close to picture edges are selected and, through a movement characteristics analysis, blocks are identified that belong to said areas and that are concerned only by the actual movement of the subject and,  for blocks chosen among the identified ones,  the luminance value  is  replaced by a value  linked to the individual  pixel  luminance  and  to  the  average  block luminance value.   For the second distortion,  echoes are applied that are randomly chosen in a prearranged set and that alternate at random.
Patent CA-2256262-C (CA)
Inventor: MICHELSEN THEODORE W
IPC: D06N5/00
Filed: 1998-12-17
Granted: 2008-02-19
Abstract: A method of manufacturing roofing felts, cap sheets, base sheets and similar built-up roofing products from fibrous mats includes: supplying a roofing mat to a manufacturing process; moisturizing the roofing mat by applying steam or a liquid mist to one or both major surfaces of the roofing mat during the manufacturing process to increase the moisture content of the roofing mat and reduce the amount of hot bitumen accepted by the roofing mat during a coating operation; and applying a hot bitumen coating to one or both major surfaces of the roofing mat during the manufacturing process after the moisture content of the roofing mat has been increased by the moisturizing step.
Patent CA-2259682-C (CA)
Title: Meules a permeabilite elevee
Inventor: CARMAN LEE A
IPC: B24D3/02
Filed: 1997-06-23
Granted: 2002-06-11
Abstract: Un article abrasif présentant certains niveaux minimum de perméabilité à des fluides comprend environ 40 à 80 % en volume de porosité consolidée et des quantités efficaces de grains abrasifs et deliant afin d'effectuer des opérations de meulage doux et de meulage profond. La perméabilité élevée au passage de fluide et la porosité consolidée permettent d'obtenir une structure ouverte de canaux afin de permettre le passage de fluides à travers l'article abrasif et l'élimination des copeaux de pièces à usiner pendant les opérations de meulage.
Patent CA-2260626-C (CA)
Title: High speed wide tuning range multi-phase output ring oscillator
Inventor: KWASNIEWSKI TADEUSZ
IPC: H03K3/03
Filed: 1999-01-29
Granted: 2001-04-24
Abstract: A ring oscillator comprising: a plurality of sub-feedback loops, each comprising a pair of serially connected inverters and a feedback inverter having its input coupled to the output of the pair of inverters and its output connected to the input of the pair of inverters, the pairs of inverters being connected in a ring, and a downstream inverter of each respective pair of inverters forming an upstream inverter of an immediately following pair of inverters.
Patent CA-2261211-C (CA)
Title: Dispositif de levage pour vehicules lourds et procede associe
Inventor: BRIAND JEAN
IPC: B66F7/20
Filed: 1998-05-22
Granted: 2006-11-14
Abstract: L'invention concerne un dispositif de levage (10) universel permettant de soulever des véhicules tous terrains lourds, tels que les pelles mécaniques utilisées pour les opérations minières. Le dispositif de levage soulève la partie tournante (F) supérieure de la pelle et permet d'enlever sa base (C) avec les roues dans le but d'effectuer l'entretien, par exemple, du mécanisme de rotation de la pelle. Le dispositif de levage comprend des palonniers (16, 18) avant et arrière, sur lesquels sont fixées amovibles des pattes de fixation (118, 220) de différents types qui assurent le positionnement correct des palonniers par rapport (16, 18) à la plate-forme tournante (F) des différents modèles de pelles mécaniques. Des points de levage (12, 14) avant et arrière commandent le déplacement vertical des palonniers (16, 18) avant et arrière respectivement. Typiquement, chaque point de levage (12, 14) comprend une paire de cylindres (20) montés parallèles, un détecteur (254) de hauteur absolue de levage et un détecteur (262) de longueur de course du piston, qui sont connectés à un automate conçu pour commander l'opération de levage de la plate-forme tournante (F) de la pelle mécanique.
Patent CA-2262922-C (CA)
Inventor: STACK RICHARD S
IPC: C08F8/30
Filed: 1997-07-28
Granted: 2007-06-05
Abstract: On décrit des nouveaux polymères modifiés et présentant au moins un groupe -NOX par unité de masse atomique 1200 du polymère, X valant un ou deux. Dans un mode de réalisation, ce polymère est un polymère S-nitrosé et on le prépare en faisant réagir un polymère à plusieurs groupes thiol avec un agent de nitrosation dans des conditions appropriées à une nitrosation des groupes thiol libres. On peut utiliser les polymères de la présente invention pour enrober des dispositifs médicaux, afin d'apporter du monoxyde d'azote in vivo au niveau des sites de traitement.
Patent CA-2265420-C (CA)
Inventor: CHOI CHRISTOPHER W M
IPC: B29C45/54
Filed: 1999-03-15
Granted: 2005-02-08
Abstract: A method and system of operating a two stage injection molding machine wherein movement of the injection plunger in the shooting pot is co-ordinated with movement of the plasticizing screw and melt flow into the shooting pot such that the plunger provides minimal resistance to the melt flow into the shooting pot while avoiding the production of voids or air inside the melt. The undesired shear forces to which the melt is exposed are thus reduced, correspondingly reducing the melt degradation products which would otherwise result.
Patent CA-2268734-C (CA)
Inventor: VAN DER HORST PETER M
IPC: C09K8/24
Filed: 1999-04-07
Granted: 2009-08-04
Abstract: The present invention generally relates to water based drilling fluid compositions which contain at least one viscosity builder and at least one rheological control agent wherein said rheological control agent is an amphoteric polymer, the cationic groups of said amphoteric polymer being quaternary ammonium groups.
Patent CA-2272361-C (CA)
Inventor: LAAS HANS-JOSEF
IPC: C08G18/70
Filed: 1999-05-17
Granted: 2008-04-01
Abstract: The present invention relates to water dispersible polyisocyanate mixtures prepared from aliphatic, cycloaliphatic, araliphatic and/or aromatic diisocyanates and having a) an average isocyanate functionality of at least 2.0, b) a content of 5.0 to 25.0 wt.%, based on resin solids, of isocyanate groups (calculated as NCO; molecular weight = 42) and c) a content of 2 to 50 wt.%, based on resin solids, of ethylene oxide units calculated as C2H2O; molecular weight 44) incorporated within polyether chains containing an average of 5 to 35 ethylene oxide units, wherein at least 60 mole % of the polyether chains are connected via allophanate groups to two polyisocyanate molecules which are each prepared from at least two diisocyanate molecules. The present invention also relates to a process for the preparation of these water dispersible polyisocyanate
Patent CA-2277494-C (CA)
Title: Laminated shingle
Inventor: ALLINGER WILLIAM
IPC: E04D1/26
Filed: 1999-07-12
Granted: 2005-04-26
Abstract: Laminated shingles are manufactured from roll stock roofing material that is wider than that used to make similar laminated shingles. The roll stock includes longitudinal edge strips having a reduced thickness. The roll stock is cut into strips of tabbed top sheets and backing sheets. The strips of material used for the backing sheets are at once wider than commonly used in the industry, and include the longitudinal edge strips of reduced-thickness material. Because the backing sheet is wider two rain seal strips are laid down on the backing sheet prior to being laminated to the tabbed top sheet. The backing sheets are laminated to the tabbed top sheets with the longitudinal edges aligned. The wider backing sheet provides a substantially wider nail zone. In addition, since it allows for a second rain seal strip, provides somewhat more protection against leakage. The portion of the backing sheet that comprises the added width is relatively thinner than the remaining portions of the sheet. Paired shingles may therefore be oriented adjacent one another in opposite directions and stacked and bundled. The total thickness of the stack will be the same throughout the stack, so the stack of shingles is flat.
Patent CA-2281592-C (CA)
Inventor: ALBRIGHT STEPHEN L
IPC: E21B19/16
Filed: 1998-01-29
Granted: 2006-12-12
Abstract: A power tong (1) for rotating a tubular (40) in wellbore operations, the power tong comprising an outer case (2), a rotary (3) rotatably mounted in the outer case (2) for rotating a tubular (40), apparatus (4) for rotating the rotary (3) to rotate the tubular (40), at least one active jaw (8) movably mounted on the rotary (3) and displaceable relative thereto to grip the tubular (40), the at least one active jaw (8) having a gripping element (15) for contacting the surface of the tubular (417), and wherein one of said active jaw (8) and said rotary (3) is provided with a cam (27) and the other with a cam follower ( 19), characterized by pre-load apparatus (28, 29) interconnected directly or indirectly between the at least one active jaw (8) and the rotary (3) for, in use, displacing said active jaw (8) with respect to said rotary (3) so that the active jaw is cammed into gripping engagement with the tubular (40) and so inhibit relative rotation between said active jaw (8) and said tubular (40) on subsequent rotation of said rotary (3).
Patent CA-2282129-C (CA)
Inventor: CANNET GILLES
IPC: F16K31/60
Filed: 1999-09-14
Granted: 2007-07-24
Abstract: The invention relates to a valve (7), particularly a shut-off valve for a container (2) of pressurized fluid. The valve (7) comprises at least one displaceable actuating lever (8) which can be moved between at least one open position and at least one closed position. The lever (8) further comprises at least one elastically deformable and/or pre-breakage zone (3).
Patent CA-2283873-C (CA)
Inventor: SCHNEID HANS JORG
IPC: H01M50/242
Filed: 1999-01-05
Granted: 2007-05-29
Abstract: L'invention concerne un support de type ensemble modulaire pourvu de moyens de rétention antisismiques, en particulier, pour des batteries d'accumulateurs et similaires. Ce support comprend un châssis de support (1) pourvu de plaques latérales de support (2) assemblées par des traverses (3,5). Ces dernières forment ainsi une zone de support des batteries d'accumulateurs et similaires,. En outre, ce support comporte un châssis de rétention (10) qui est supporté par le châssis de support (1) et peut être fixé contre une partie médiane de l'extension verticale des batteries d'accumulateurs supportées par les traverses.
Patent CA-2283939-C (CA)
Title: Non-antigenic branched polymer conjugates
Inventor: MARTINEZ ANTHONY J
IPC: C12N11/08
Filed: 1998-03-13
Granted: 2003-10-28
Abstract: Branched, substantially non-antigenic polymers are disclosed. Conjugates prepared with the polymers and biologically active molecules such as protein s and peptides demonstrate extended circulating life in vivo. Substantially fewer sites on the biologically active material are used as attachment sites . Methods of forming the polymer, conjugating the polymers with biologically active moieties and methods of using the conjugates are also disclosed.</SDO AB>
Patent CA-2285420-C (CA)
Title: Ternary photoinitiator system for curing of epoxy resins
Inventor: JACOBS DWIGHT W
IPC: A61K6/891
Filed: 1998-03-03
Granted: 2009-05-19
Abstract: Photocurable, addition polymerizable compositions contain an epoxy resin and a photoinitiator system containing (a) an epoxy resin and (b) a photoinitiator system comprising: (i) an iodonium salt; (ii) a visible light sensitizer; and (iii) an electron donor compound, wherein the photoinitiator system has a photoinduced potential of at least about OmV  relative to a standard solution of 2.9X10-5 moles/g diphenyl iodonium hexafluoroantimonate and 1.5X10-5 moles/g camphorquinone in 2-butanone. The compositions cure on exposure to light in the visible spectrum and are useful in a variety of applications, including dental adhesives and composites.
Patent CA-2287601-C (CA)
Title: Bactericidal vacuum cleaner filter bag
Inventor: URSO JOSEPH P
IPC: B01D46/02
Filed: 1999-10-26
Granted: 2000-11-21
Abstract: A vacuum cleaner filter bag exposes bacteria in incoming dirty air to bactericide throughout the useful life of the bag. Fingers provided on the interior walls of the bag are impregnated with bactericide. Air flow in the bag during vacuum cleaner operation causes the fingers to stand out from the wall, intercepting particles in the dirty airstream and exposing bacteria on those particles to the bactericide. The fingers stand out from the wall, and thus kill bacteria, substantially throughout the useful life of the bag, even after a cake of dust and dirt has formed on the inner walls of the bag.
Patent CA-2287952-C (CA)
Inventor: BROSCH ANDREA LEE
IPC: D04H1/54
Filed: 1998-05-04
Granted: 2006-11-28
Abstract: The present invention relates to a fibrous material which includes a plurali ty of polylactide containing fibers. The plurality of polylactide containing fibers can be considered low shrinkage or high shrinkage. The plurality of polylactide containing fibers are considered low shrinkage fibers if they provide a boiling water shrinkage propensity of less than about 20 %. The plurality of polylactide containing fibers are considered high shrink fibers if they provide an average fiber boiling water shrinkage propensity of greater than about 10 % and a heat of fusion of less than about 25 J/g. The invention additionally relat es to the use of an extrusion process to provide low shrinkage fibers and high shrinkage fibers. The invention futher relates to the use of these fibers in desirable products.
Patent CA-2293638-C (CA)
Title: Jetting layers of powder and the formation of fine powder beds thereby
Inventor: SACHS EMANUEL M
IPC: B29C48/92
Filed: 1998-06-12
Granted: 2010-08-24
Abstract: A powder bed (32) is built up by repeated deposition of a slurry that contains powder. Layers are made by depositing a liquid dispersion of the desired powdered material, which then slip-casts into the forming powder bed to make a new layer (34). The slurry may be deposited in any suitable manner, such as by raster or vector scanning, or by a plurality of simultaneous jets that coalesce before the liquid slip-casts into the bed, or by individual drops, the deposits of which are individually controlled, thereby generating a regular surface for each layer.
Patent CA-2294535-C (CA)
Title: Radio interface for a cordless small system using the 2.4 ghz ism band
Inventor: TERGLANE HERMANN-JOSEF
IPC: H04B1/713
Filed: 1997-08-14
Granted: 2004-11-30
Abstract: The present invention relates to a radio interface for a cordless small system using the 2.4 GHz ISM band. According to the present invention, a transmission system having a fixed station (1) and at least one mobile station (2, 3) is provided for this purpose, the fixed station (1) and the mobile station (2) each having devices (RF modules 4, 5) in order to transmit the data in time slots using a frequency-division multiplex method (FDMA) and a time-division multiplex method (TDMA), and with time division duplexing (TDD). As is known from DECT      Standard, the data are modulated onto a carrier frequency (f x) using a GMSK modulation method. The RF modules (4, 5) in the fixed station (1) and, respectively, the mobile station (2) are in this case designed such that the carrier frequency (f x) is changed after a predetermined time period, which may correspond, for example, to the time duration of a time slot or of a transmission frame.     A transmission frame in this case contains 16 time slots.
Patent CA-2295103-C (CA)
Title: Energy absorbing articles of extruded thermoplastic foams
Inventor: CHRISTENSON CHRISTOPHER P
IPC: B29C43/18
Filed: 1998-06-26
Granted: 2008-04-29
Abstract: An energy absorbing article having a direction in which impact resistance is desired is formed of extruded thermoplastic foam exhibit anisotropic compressive strength. The extrusion direction of the thermoplast ic foam is aligned substantially parallel with the direction in which impact resistance is desired to provide an energy absorbing article exhibiting a high ratio of compressive strength to weight. In accordance with a particular aspect of this invention, the thermoplatic foams may be prepared by the extrusion foaming of a molten thermoplastic composition utilizing a die including a mulitiplicity of orifices. In additon to coextrudates comprising coalescend strand foams having foam strands of two or more different densities, the extruded thermoplastic foams exhibiting antisotropic strength properties which may be utilized in accordance with the principles of this invention include coextrudates including foam strands and a unitary (integral piece) interleaving profile of an unfoamed thermoplastic.
Patent CA-2300204-C (CA)
Title: Process to produce 4-hydroxy-2-oxo-pyrane derivates useful as protease inhibitors
Inventor: HEWITT BRADLEY D
IPC: C07D405/12
Filed: 1998-09-03
Granted: 2006-12-12
Abstract: Disclosed is a novel process and novel intermediates to prepare [R-(R*,R*) ]-N-L3-[1-[5, 6-dihydro-4-hydroxy -2-oxo-6-(2-phenylethyl) -6-propyl-2H-pyran-3- yl]propyl]phenyl]-5- (trifluo- romethyl)-2- pyridinesulfonamide (XIX) which is a protease inhibitor useful in treating humans infected with the HIV virus.
Patent CA-2301583-C (CA)
Title: Mixing apparatus
Inventor: CLARKE NEVILLE
IPC: B01F3/08
Filed: 1998-08-27
Granted: 2008-04-22
Abstract: A method and apparatus for mixing a first material and a second material is described in which the first material comprises a mixture of two or more dissimilar components which it is desired to separate. The method and apparatus involve forming an intimate mixture of the two materials prior to separating the two dissimilar components of the first material. The apparatus involves the use of a hydrocyclone for aerating or gasifying a feed stream, such as waste water containing oleophilic residue or food residue, to entrain the particles of residue within the air or gas bubbles prior to separating the oil or food residues from the carrier material, typically water. Instead of using the hydrocyclone as a separator, it is used as a mixer which provides surprising results and facilitates separation of the aerated components.