baber/WOPTO huggingface dataset:
Patent CA-2155084-C (CA)
Inventor: GRAMLICH BRUCE
IPC: E21B33/08
Filed: 1995-07-31
Granted: 2003-11-25
Abstract: A device for attachment to a production wellhead of the type having a stuffing box and a rod string protruding from the upper end of the stuffing box, for collecting and retaining a fluid escaping from between the stuffing box and the rod string at the upper end of the stuffing box. The device comprises a housing for collecting the escaping fluid by surrounding the upper end of the stuffing box and a portion of the rod string adjacent thereto, and a replaceable absorbent material contained within the housing for retaining the escaping fluid which is collected in the housing. The device may also include a window mounted in the housing which facilitates viewing of the absorbent material from outside of the housing in order to determine when the absorbent material is saturated and should be replaced.
Patent CA-2157111-C (CA)
Inventor: VAN ZYL IAN D
IPC: H04B1/04
Filed: 1994-03-02
Granted: 2000-02-08
Abstract: A loop-powered intelligent for process control variables is provided which can operate at an average current in excess of the minimum value of current that can flow in the loop (A, B). In order to keep the average current drawn down to the actual loop current, execution of a control program by a microprocessor (2) incorporated in the transmitter is slowed down to the extent necessary to reduce current demand of the transmitter to that available. Slowing down is preferably accomplished by means (24) for sensing when a current deficit occurs and placing the microprocessor in sleep mode to reduce current consumption until the deficit is made up. Entry into sleep mode may be deferred during during critical operations of the microprocessor.
Patent CA-2158859-C (CA)
Title: Increasing the molecular weight of polyesters and premix useful for this process
Inventor: PFAENDNER RUDOLF
IPC: C08J11/04
Filed: 1994-04-11
Granted: 2005-03-08
Abstract: An increase in the molecular weight of polyester and recycled polyester can be achieved by blending said polyester with a difunctional epoxy resin and a sterically hindered hydroxyphenylalkylphosphonic acid ester or half-ester and heating the blend to above the melting point (glass transition temperature) of the polyester.
Patent CA-2162387-C (CA)
Inventor: HYPPAENEN TIMO
IPC: B01J8/26
Filed: 1994-05-16
Granted: 2000-08-22
Abstract: Les particules présentes dans un réacteur à lit fluidisé (tel qu'un réacteur à lit fluidisé circulant) sont déchargées de la chambre dudit réacteur (10) et refroidies (la chaleur dégagée par celles-ci étant récupérée) dans une chambre de traitement (16). Cette opération se déroule de manière particulièrement efficace par la décharge des particules de la chambre du réacteur à un premier niveau (ex. à travers une garniture non mécanique ou une paroi de classement) dans une chambre à poussée ascensionnelle (14). Un gaz s'écoulant vers le haut dans ladite chambre à poussée ascensionnelle entraîne les particules et les remonte jusque dans la chambre de traitement. Une fois traitées, les particules situées dans la chambre de traitement sont renvoyées dans la chambre de réaction au-dessus du premier niveau, point auquel la pression dans la chambre de traitement est supérieure à celle dans la chambre de réaction. Les particules peuvent être classées dans la chambre à poussée ascensionnelle au moyen d'un gaz de fluidisation utilisé pour transporter les particules solides d'une taille inférieure à une taille prédéterminée dans la chambre de traitement, les particules plus grosses étant déchargées par le fond (38) de ladite chambre à poussée ascensionnelle.
Patent CA-2164026-C (CA)
Inventor: DUTTWEILER DONALD LARS
IPC: G10L21/0232
Filed: 1995-11-29
Granted: 2001-08-14
Abstract: Failure to cancel echos at frequencies in which the frequency characteristics of sub-band filters in the X and Y analysis filter banks overlag in subband echo cancelers is overcome by employing an X-analysis filter bank in which the pass-band of the subband filters is wider than the pass-band of the corresponding subband filters in the Y-analysis filter bank. This insures that there is sufficient energy in the tap delay lines of the adaptive filters in thesubband echo cancelers at all frequencies where echos are to be synthesized. More specifically, the keeping of sufficient energy in the tap delay lines of the adaptive filters in the subband echo cancelers avoids exciting eigenmodes associated with the small eigenvalues of the correlation matrix.
Patent CA-2167664-C (CA)
Inventor: VANDERBERG ED
IPC: A01F29/00
Filed: 1996-01-19
Granted: 1998-10-20
Abstract: A bale separator for use in separating bales of crop materials.  The bale is separated by the action of a rotatable member which engages the bale.  The rotatable member includes a central shaft and a number of spaced apart fingers which extend out from the shaft to engage the bale during rotation of the shaft.   The separator acts substantially without chopping the bale materials and can be used to separate and spread the bale materials in one operation. The separator can be mounted on a trailer for towing.
Patent CA-2170288-C (CA)
Inventor: BOYD DEREK RAYMOND
IPC: C07C35/48
Filed: 1994-09-07
Granted: 2007-08-14
Abstract: This application relates to 3-substituted and 4-substituted cis-diols.  Specifically, there are provided 3-substituted diols of formula (II) and 4-substituted cis-diols having (1S, 2R) and (1R, 2S) absolute configurations of formulae (III) and (IV). Also provided are processes for making such 3- and 4-substituted cis-diols using a reductive fission reaction.  The compounds described herein are useful as synthons for the preparation of various compounds including therapeutics, agricultural, polymers and other classes of compounds. In formulae (II, III  and IV), R is halogen, CN, aryl, alkyl, alkenyl, alkynyl, O-alkyl, CF3 or NO2.
Patent CA-2180289-C (CA)
Inventor: ERBER ANDREAS
IPC: E06B9/386
Filed: 1994-12-29
Granted: 2005-08-23
Abstract: A roller shutter slat has hollow sectional slats (1) with a central part (1c), two edge parts (1a) and transverse grooves (1b) arranged therebetween for receiving bearing or adjusting links (3,4). The edge parts (1a) and the central parts (1c) are spaced apart and interconnected by linking elements (5, 6, 40, 41) inserted into hollow chambers (26) of the hollow sectional slat (1). The cross-section of the linking elements (5, 6, 40, 41) is narrower than the cross-section of the hollow chambers (26) and the linking elements (5, 6, 40, 41) are linked to the hollow sectional slats (1) by tongue-and-groove joints (9, 10; 42, 43). Easy-to-produce grooves (1b) are thus created without weakening the roller shutter slat (1) in the area of the grooves (1b).
Patent CA-2198614-C (CA)
Title: Rf strip line resonator
Inventor: GAPSKI DIETMAR
IPC: H01P7/08
Filed: 1995-08-23
Granted: 2000-04-18
Abstract: RF strip line resonator In order to compensate changes in the resonant frequency of the resonator occurring owing to fluctuations in the distance between the reference distance (d s) and an actual distance (d s~.DELTA.d s) in an RF strip line resonator with a strip line (10) which is arranged at a desired distance (d s) from a metallic conductor (11), the strip line (10) is curved. This curvature induces eddy currents in the conductor (11). The eddy currents bring about a reduction in the inductance of the RF strip line resonator. The smaller/larger the distance between the strip line and the metallic conductor becomes, the smaller/larger this inductance becomes. Since shortening/ lengthening the distance between the two conductors is however also accompanied by an increase/reduction in the capacitance of the RF strip line resonator, with the correct dimensioning of the curved strip line the two aforesaid effects cancel one another out and the frequency of the RF strip line resonator is approximately stable with respect to the given fluctuations in distance.
Patent CA-2199059-C (CA)
Inventor: SOIRAT ARNAUD
IPC: C01F7/473
Filed: 1996-07-16
Granted: 2008-10-14
Abstract: A method for removing sodium oxalate from sodium aluminate solutions produced by alkaline bauxite treatment according to the Bayer process, wherein the sodium oxalate in at least one fraction of the previously decomposed sodium aluminate solution is precipitated using an agent that destabilises the supersaturated state of the sodium oxalate, i.e. a deoxalation initiator, and the oxalate, precipitated with the destabilising agent in the form of an insoluble residue is separated from the purified sodium aluminate solution which is then recycled as the treatment liquor. The destabilising agent or deoxalation initiator contacted with the sodium aluminate solution is a salt other than an oxalate, a metal oxide, a metal hydroxide or a mixture thereof, said destabilising agent remains insoluble in or chemically inert to the reaction medium, and following an optional regeneration step, said agent is recycled to the start of the process as a deoxalation initiator.
Patent CA-2200615-C (CA)
Title: Stainless steel alkali treatment
Inventor: SHAH SADIQ
IPC: C23C22/62
Filed: 1995-09-22
Granted: 2000-11-28
Abstract: The invention includes a method for cleaning and passivating a stainless steel surface comprising: 1) contacting the surface with 15-45 ml/liter of a composition comprising between about 15 and 50 % alkaline component, between about 1 to 15 % chelant, and between about 35 to 84 % water; 2) maintaining contact to dislodge and remove residue from the surface; 3) continuing contact to complex free iron ions liberated from the surface with the chelant to form an oxide film on the surface; and 4) continuing contact to precipitate the complexed ions into the oxide film. The compositions may further include a surfactant selected from the group consisting of anionic, cationic, nonionic and zwitterionic surfactants to enhance cleaning performance.
Patent CA-2201013-C (CA)
Inventor: ISHII TOMOKO
IPC: H04B3/23
Filed: 1997-03-25
Granted: 2001-05-01
Abstract: A counter 160 increments a count value every given period. An adaptive operation control unit 90 selects channels in.which adaptive operation are done from all the channels in obedience to the count value to output produced selection signals to AND circuits 151 to 15n. Double-talk detection circuits 81 to 8n judge the presence of double-talk states and output detection signals to the AND circuits. The AND circuits operate logical AND of the selection signals and the detection signals and output the logical AND results as control signals to filter coefficient updating circuits 71 to 7n. The filter coefficient updating circuits update or do not update filter coefficients stored in FIR filter units 51 to 5n according to the control signals. The FIR filter units produce echo replicas by calculating convolutions of the filter coefficients and the receive signals. Subtractors 61 to 6n subtract the echo replicas from transmission signals to output residual signals.
Patent CA-2207203-C (CA)
Title: Liquid discharging head, head cartridge and liquid discharging apparatus
Inventor: KARITA SEIICHIRO
IPC: B41J2/14
Filed: 1997-06-06
Granted: 2002-02-19
Abstract: The present invention provides a liquid discharging head comprising a discharge port for discharging liquid, a bubble generating area for generating a bubble in the liquid, a movable member disposed in a confronting relation to the bubble generating area and displaceable between a first position and a second position more spaced apart from the bubble generating area than the first position, and side members integrally formed with at least parts of the movable member on its both sides and shiftable together with the movable member and adapted to cover sides of a bubble generated, and wherein the movable member is shifted from the first position to the second position by pressure due to generation of the bubble in the bubble generating area, and the bubble is more expanded downstream than upstream of a direction toward the discharge port by the displacement of the movable member.  The present invention further provides a head cartridge having such a liquid discharging head and a liquid discharging apparatus having such a liquid discharging head.
Patent CA-2212791-C (CA)
Title: Process for reducing sterols and free fatty acids from animal fat
Inventor: RITTER CHRIS
IPC: A23D9/007
Filed: 1996-02-20
Granted: 2001-01-23
Abstract: The process for reducing sterols and free fatty acids from animal fat entails forming an oil-in-water emulsion using a mixing device such as a pump or an inline mixer; and then pumping the emulsion through a conduit for a period of time. The emulsion is made from water, liquefied animal fat and cyclodextrin. The mixing device forms the emulsion in less than one minute; and the emulsion is pumped through the conduit for 5 to 60 minutes. During the time that the emulsion is moving through the conduit, the sterols and free fatty acids move from the fat phase to the water phase and form complexes with the cyclodextrin. These complexes are fairly stable and can be separated from the emulsion by centrifugation. The resulting fat has a reduced sterol and free fatty acid content.
Patent CA-2217661-C (CA)
Title: Composite rock bit seal
Inventor: CAWTHORNE CHRIS E
IPC: E21B10/22
Filed: 1997-10-07
Granted: 2004-01-20
Abstract: A high performance rock bit journal seal is formed from a composite material comprising an elastomeric material and a nonelastomeric polymeric material. The polymeric material is preferably in the form of fibers woven into a sheet. The elastomeric material includes at least one lubricant additive. The composite 'seal' material comprises a number of repeating sheets of polymeric fabric that are bonded together with the elastomeric material. In one embodiment, the seal includes a body formed entirely from the composite material, in which case both the static and dynamic seal surfaces are the same. In another embodiment, the seal includes a first body portion formed from the composite material, and a remaining body portion formed from a noncomposite elastomeric seal material. Seals formed from the composite seal material display enhanced wear resistance, reduced coefficient of friction, and improved high-temperature stability and endurance when compared to noncomposite seal materials, thereby both extending the useful life of seals formed therefrom and of rock bits that employ such seals.
Patent CA-2218211-C (CA)
Inventor: LEUCA ILEANA A
IPC: H04M3/42
Filed: 1997-10-14
Granted: 2001-02-06
Abstract: L'invention est constituée par une méthode et un appareil qui améliorent la convivialité des systèmes de messagerie. L'expéditeur d'un message doit créer un numéro d'identification servant à identifier le message en question. Il peut ultérieurement, en utilisant ce numéro, demander au centre de répartition des messages de vérifier si son message a été transmis au destinataire ou s'il a été reçu par celui-ci.
Patent CA-2218217-C (CA)
Inventor: DE BONT FRANSISCUS MARINUS JOS
IPC: G10L19/12
Filed: 1997-01-31
Granted: 2004-12-07
Abstract: In a CELP coder a comparison between a target signal and a plurality of synthetic signals is made. The synthetic signal is derived by filtering a plurality of excitation sequences from a one-dimensional codeboo k by a synthesis filter having parameters derived from the target signal. The excitation signal which results in a minimum error between the target signal and the synthetic signal is selected. The search for the best excitation signal requires a substantial computational complexity. To reduce the complexity a preselection of a small number of excitation sequences is made by selecting only every L th codebook entry for preselecting a plurality of excitation sequences. With this small number of excitation sequences a full complexity search is made in whi ch all excitation sequences surrounding the preselected ones are involved in the selection.
Patent CA-2222146-C (CA)
Title: A method for flame stabilization in a process for preparing synthesis gas
Inventor: OORTWIJN PETER
IPC: F23D14/74
Filed: 1996-06-05
Granted: 2007-11-27
Abstract: A method for stabilizing the flame on the tips of burner internals in a process for preparing synthesis gas by partial oxidation of a gaseous hydrocarbon-containing fuel comprising the steps of: a) supplying a gaseous hydrocarbon-containing fuel, a moderator gas and an oxidiser through a burner to a reactor, wherein the mass flow of the moderator gas is adjusted such that the moderator gas concentration does not exceed a predetermined limit; b) effecting process conditions such that the flame is contacting the burner internal tips; c) re-adjusting the velocities and mass flows of the fuel and/or oxidiser and/or moderator gas in case of flame-lifting from the burner internal tips in such a manner that the flame is restabilized on the burner internal tips; and wherein in step c) the moderator gas concentration does not exceed the said limit of step a).
Patent CA-2227267-C (CA)
Inventor: PROPP MICHAEL B
IPC: H04M11/00
Filed: 1996-07-17
Granted: 2011-10-11
Abstract: The present invention uses digital communications over a non-telephone wiring network (220) (i.e. existing power line distribution network) to provide telephone line service to individual users (210). The telephone line service is "on-demand" in that any user can interface a telephonic device to the electrical wiring (220) and instantly obtain telephone line service. The present system may be used to provide primary telephone service and alternatively secondary telephone service for those not willing to pay for dedicated line service. For primary or secondary service, the telephone number associated with the line may be assigned by the telephone company, or utility company, or may be a uniquely assigned telephone number hardwired into each particular telephone to be connected to the electrical wiring (220). The additional "on-demand" telephone lines may be assigned an identifier, such as a suffix, for use in routing calls to and from the particular "on-demand" line.
Patent CA-2231052-C (CA)
Title: Benzoxazepine compounds, their production and use as lipid lowering agents
Inventor: YUKIMASA HIDEFUMI
IPC: C07D413/06
Filed: 1996-09-12
Granted: 2007-11-13
Abstract: This invention provides new benzox-azepine compounds represented by formula (I), wherein R stands for a lower alkyl group optionally substituted with a hydroxyl group, X stands for an optionally substituted car-bamoyl group or an optionally substituted het-erocyclic group having a deprotonatable hy-drogen atom, R1 stands for a lower alkyl group and W stands for a halogen atom having ac-tivities of lowering cholesterol-level and low-ering trigluceride-level, and being useful for prophylaxis and therapy of hyperlipidemia.
Patent CA-2231573-C (CA)
Inventor: FERNANDEZ JOSE M
IPC: H01M50/244
Filed: 1996-09-20
Granted: 2002-04-16
Abstract: A battery pack having a protruding contact (14) is provided with a disconnect switch circuit. The circuit comprises at least one battery cell (22), and a mechanical switch (24) which controls the operation of an electronic switch circuit (36). A latch member (16) is provided for attaching the battery pack to a device to be powered, and is moveable between a first and second position, and is biased by a spring means to the first position. In the first position, the latch member acts on the mechanical switch such that the electronic switch circuit disconnects the battery contact from the battery cell or cells. When the latch member is moved to the second position, the circuit operates to connect the battery contact to the battery cell of cells.
Patent CA-2235754-C (CA)
Title: Transducteurs piezo-electriques
Inventor: WARNAKA GLENN E
IPC: H04R17/00
Filed: 1996-11-04
Granted: 2002-08-20
Abstract: Le dispositif selon l'invention est constitué d'un matériau piézo-électrique (11), d'un substrat ou espaceur (12) et d'un organe de connexion électrique (13) pour faisceau de câbles ou tout autre connexion électrique. On utilise le substrat (12) pour accélérer le mouvement de l'élément piézo-électrique (11) en maintenant celui-ci à une certaine distance du diaphragme. Ce substrat (12) a une surface plus importante que celle de l'élément piézo-électrique (11). Le système transducteur (10), qui  imprime un mouvement au diaphragme, comporte un élément piézo-électrique susceptible de se déplacer si un potentiel électrique (13) lui est appliqué, pourvu d'un coté supérieur, d'un périmètre extérieur et d'un coté inférieur auquel vient se rattacher le substrat (12). Un équipement (15) applique un potentiel électrique à l'élément piézo-électrique (11).
Patent CA-2236013-C (CA)
Inventor: RIXON CHRISTOPHER J
IPC: B60K26/02
Filed: 1998-04-27
Granted: 2001-08-21
Abstract: An adjustable control pedal assembly for a motor vehicle.    The  assembly  includes  an  extensible  module positioned on the lower end of the pedal arm of the pedal assembly and carrying the pedal pad.  The module includes two  screw  jacks  which may be  selectively extended  or contracted to vary the distance to the pedal pad from the lower end of the pedal arm and thereby accommodate drivers of various statures.   The  lower screw jack includes a coarser thread than the upper screw jack so that as the pedal pad is moved away from the lower end of the pedal arm in response to extension of the screw jacks the pedal pad is also pivoted upwardly to further accommodate drivers of small stature.
Patent CA-2238934-C (CA)
Title: Mastic asseche susceptible d'etre pompe
Inventor: SPINKS ANNE
IPC: C09J123/08
Filed: 1997-04-02
Granted: 2003-06-17
Abstract: L'invention concerne un mastic asséché, thermoplastique, susceptible d'être pompé et pouvant assécher un verre isolant étanchéifié. Les compositions décrites comprennent: A) un composant résineux renfermant principalement: i) 4 à 75 % en poids du composant résineux d'un agent filmogène, ce dernier comprenant un élément sélectionné dans le groupe constitué par: a) un interpolymère éthylène/.alpha.-oléfine sensiblement linéaire, homogène; b) un caoutchouc copolymère bloc en forme d'Y ou d'étoile, linéaire; c) un polymère polybutène liquide; ou d) des mélanges de a, b et/ou c; utilisé seul ou en combinaison avec un ou plusieurs polymères sélectionnés dans le groupe constitué par: e) un polymère polyisobutylène ayant un poids moléculaire moyen en poids d'environ 35 000 ou plus; et f) un caoutchouc butyl ayant un poids moléculaire moyen en poids atteignant environ 500 000, ce caoutchouc butyl, si présent, représentant moins de 50 % du composant filmogène; ii) 25 à 96 % en poids du composant résineux d'un composant polymère alkylène comprenant un élément sélectionné dans le groupe constitué par: a) un homopolymère, copolymère, terpolymère ou copolymère greffé non cristallisé comprenant un motif monomère de propylène; b) un interpolymère éthylène/.alpha.-oléfine sensiblement linéaire, homogène; et c) des mélanges de ceux-ci; iii) 0 à 20 % en poids du composant résineux d'un agent adhésif, stable aux U.V., faiblement volatil, compatible avec l'agent filmogène et des composants alkylène; et B) un composant desséchant/adsorbant comprenant: i) au moins 20 % en poids de la composition d'une substance desséchante ou adsorbant l'humidité et les produits chimiques, organiques, volatiles; et ii) 0 à 10 % en poids de la composition d'un adsorbant de composés organiques volatils, ce composant desséchant/adsorbant étant présent dans une quantité inférieure à la teneur que présenterait la composition, lorsqu'elle est testée conformément à la Procédure B ASTM D-1238 en utilisant une charge de 1100 grammes et un échantillon de 8 grammes, à 190 ·C, pour fournir un temps d'écoulement du mélange fondu supérieur à 60 secondes, la course du piston étant de 2,54 cm (1 pouce).