baber/WOPTO huggingface dataset:
Patent CA-2216432-C (CA)
Inventor: O'BRIEN ROBERT N
IPC: C01B17/775
Filed: 1996-03-27
Granted: 2003-12-02
Abstract: A process for producing in liquid phase, concentrated sulfuric acid in the liquid phase from a source of sulfur dioxide, is described. The process comprises converting the source of sulfur dioxide to sulfuric acid. The liquid phase comprises: a) nitric acid at a sufficient concentration to commence conversion in the presence of oxygen, of sulfur dioxide into sulfuric acid in the initial absence of sulfuric acid, b) nitric acid at a sufficient concentration to maintain conversion of sulfur dioxide in the presence of sulfuric acid either generated by said conversion or present at commencement of said conversion, and c) combined concentration of nitric acid and sulfuric acid ranging from 5M to 16M where the concentration of nitric acid is at least 5M in the initial absence of sulfuric acid, and a source of oxygen is introduced to the aqueous phase at a concentration sufficient to provide for such catalytic conversion of SO2 to H2SO4.
Patent CA-2219304-C (CA)
Title: Transmission of cdma signals over an analog optical link
Inventor: ARIYAVISITAKUL SIRIKIAT
IPC: H04B10/12
Filed: 1997-10-27
Granted: 2001-10-09
Abstract: A transmission system for backhauling CDMA signals from remote antennas to the centralized base station of a wireless communication system includes a laser transmitter and an optical receiver coupled to an optical fiber. Wireless signals are backhauled to the central base station without degrading signal quality, and with minimal signal processing performed at the remote antenna site. The RF drive current driving the laser transmitter is kept above a predetermined level to prevent noise caused by optical feedback into the laser transmitter caused by Rayleigh backscatter in the optical fiber. A method of testing the optical link is presented which avoids the expense of using a real CDMA system to test each link. The testing method enables the dynamic range of inexpensive, unisolated, uncooled lasers in the optical link to be increased so the optical link can cost-effectively backhaul the CDMA signals.
Patent CA-2223271-C (CA)
Title: Controle de dilatation dans un systeme de circulation de fluide ferme
Inventor: ROFFELSEN FRANCISCUS
IPC: F24D19/08
Filed: 1996-06-03
Granted: 2004-03-16
Abstract: On décrit un procédé de contrôle de dilatation dans un système de circulation de fluide fermé, avec variations de température. Dans ledit système, de l'air est extrait du fluide en circulation grâce à la formation d'une charge supérieure d'air dans laquelle l'air à extraire est recueilli et peut être évacué, sous la commande d'une soupape, dans l'air ambiant ou dans un espace de réception. Ce faisant, des mesures sont prises, en outre, pour réguler, lorsque la température varie, l'expansion ou le retrait du fluide circulant dans le système fermé, ainsi que pour ajouter du fluide au système, ce fluide étant extrait d'une source extérieure de fluide sous pression. Le volume de la charge supérieure d'air est mesuré de telle façon que lorsqu'une valeur définie à l'avance est dépassée, une soupape s'ouvre par laquelle le fluide pénètre dans la charge d'air jusqu'à ce que le volume de cette dernière soit sensiblement égal à la valeur définie à l'avance, à la suite de quoi la soupape se ferme.
Patent CA-2224271-C (CA)
Inventor: OKUMURA YUKIHIKO
IPC: H04B7/005
Filed: 1997-04-14
Granted: 2002-06-11
Abstract: An SIR measuring apparatus with a simple configuration capable of improving the accuracy of received SIR measurement in CDMA mobile radio equipment using pilot symbols. A received signal (20) is input to a synchronization detector (21) that regenerates the clock timing of symbols and frame timing equivalent to the repetition period of the pilot signal. An interpolating coherent detector (22) produces information symbols (23) obtained from the received signal (20) through absolute phase coherent detection. A decision signal power calculator (24) obtains desired wave power values. A quasi-interference power calculator (25) obtains differences between the power values of the information symbols and a fading envelope, and adopts the differences as the quasi-interference power. Integrators (26 and 27) integrate received desired wave power and quasi-interference wave power. An SIR measuring portion (28) divides an averaged received desired wave power integral by an averaged quasi-interference power integral to obtain the received SIR (29).
Patent CA-2224419-C (CA)
Title: Procede pour la fabrication d'alesoirs dentaires en alliage nickel-titane et alesoirs dentaires ainsi obtenus
Inventor: EUVRARD HUBERT
IPC: A61C5/42
Filed: 1998-01-06
Granted: 2005-06-28
Abstract: Procédé pour la fabrication d'alésoirs dentaires en alliage Nickel-Titane, lesdits alésoirs dentaires étant fabriqués à partir d'une ébauche métallique cylindrique déplacée à une vites se d'alimentation V A devant une meule rotative dont le disque de diamètre variable détermine une vitesse linéaire V L d'enlèvement de matière, caractérisé en ce que les paramètres sont les suivants: - V L supérieure à 91440 cm/mn, - V A inférieure à 7,62 cm/mn. L'invention a également pour objet les alésoirs dentaires ainsi obtenus .
Patent CA-2234818-C (CA)
Inventor: KOKUBU AKIO
IPC: H01T13/32
Filed: 1998-04-14
Granted: 2004-04-06
Abstract: In a spark plug, a cylindrical metal shell (1) is provided whose inner wall has a rear section and a front section to respectively serve as a diameter-increased section and a diameter-decreased section with a seat portion (1) as a boundary therebetween. An insulator (2) is fixedly placed within the metal shell (1) so that a front end surface (21) of the insulator (2) extends beyond a front end surface (12) of the metal shell (1) with a shoulder portion (231) of an insulator nose (23) engaged against the seat portion (11) of the metal shell (1) by way of a packing (10). A center electrode (3) is fixedly placed within an axial bore (22) of said insulator (2), A ground electrode (4) is connected to the front end surface (12) of the metal shell (1), and bent so that a front end surface (41) of the ground electrode (4) opposes an outer surface (311) of the center electrode (3).      The outer surface (311) and a front end surface (31) of the center electrode (3) are provided to respectively serve as a firing portion so as to form a spark discharge gap (Go) with the front end surface (41) of the ground electrode (4), the front end surface (41) of the ground electrode (4) forming an air gap (G) with an outer surface (25) of the insulator (2) so as to release creeping spark discharges along a front end surface (21) of the insulator (2).
Patent CA-2246451-C (CA)
Inventor: BLASE GUNTER
IPC: F16G13/16
Filed: 1997-02-10
Granted: 2003-01-07
Abstract: The invention relates to an energy guide chain (1) for cables and the like, the chain members (2) thereof comprising opposing side walls (4) and upper and lower transverse members (5) or walls connecting said side walls, and being flexibly connected to each other. The energy guide chain forms a lower, substantially linear section (lower strand 6) to which a sagging upper region (upper strand 8) is attached by means of a turnaround region (7) covering more than 180~, the lower side of the upper strand (8) sliding at least partially on the upper side of the lower strand (6). Individual chain members (2) are provided with guide stops (9) which prevent lateral movement of the opposite strand. According to the invention, the guide stops (9) are in the form of members extending in the longitudinal direction of the chain, and at least one guide stop (9) on the chain members (2) of the one strand (6 or 8) engages between two guide stops (9) on the chain members (2) of the opposite strand (8 or 6). Consequently, the engaged chain members (2) are prevented from moving transversely in relation to each other.
Patent CA-2249192-C (CA)
Inventor: EASON TREVOR
IPC: B60T17/04
Filed: 1998-10-05
Granted: 2001-07-24
Abstract: A test flange is used for an air brake piping system for railroad cars. The flange fits between an end flange of the brake cylinder pipe and the housing of the valve to which it is normally connected. The test flange includes a through aperture that aligns with the pipe end and the port in the valve housing and a test port that carries a quick disconnect valve in a lug with a distinct offset from the symmetrical centre line of the test flange. An internal passage in the test flange leads from the aperture to the test port.
Patent CA-2255082-C (CA)
Title: Liquid ejecting head, head cartridge and liquid ejecting apparatus
Inventor: OGAWA MASAHIKO
IPC: B41J2/14
Filed: 1998-12-04
Granted: 2004-03-30
Abstract: A liquid ejection head a plurality of ejection outlets for ejecting liquid; a first substrate and a second substrate for constituting a plurality of liquid flow paths in fluid communication with the ejection outlets, respectively when combined with each other; a plurality of energy conversion elements disposed in the liquid flow paths, respectively to convert electrical energy to ejection energy for the liquid in the liquid flow paths; a plurality of elements or electric circuits having different functions for controlling driving conditions of the energy conversion elements; wherein the elements and electric circuits are provided either on the first substrate and the second substrate, depending on their functions.
Patent CA-2257918-C (CA)
Title: Raffinate hydroconversion process
Inventor: GALLAGHER JOHN E
IPC: C10G65/12
Filed: 1997-06-23
Granted: 2005-07-26
Abstract: A process for producing a high VI/low volatility lubricating oil basestock. The process comprises subjecting the raffinate from a solvent extraction step (40) to a two-step, single stage hydroconversion process wherein the first step involves severe hydroconversion of the raffinate (42) followed by a cold hydrofinishing step (50).
Patent CA-2260621-C (CA)
Title: Image input apparatus, image input system, image sending/receiving system, image input method and storage medium
Inventor: FUJIWARA HIDEYUKI
IPC: G06F13/38
Filed: 1999-02-03
Granted: 2002-05-07
Abstract: Provided is an image input apparatus in which changeover between sensing and transfer of low-resolution images such as moving images and high-resolution images such as still images can be performed smoothly during image sensing and data transfer operations. The apparatus includes an image signal generating circuit for sensing the image of a subject and generating an image signal indicative thereof; a data transfer circuit for transferring the image signal generated by the image signal generating circuit to an external device via a prescribed communications interface, the data transfer means having a first transfer mode in which there can be assured a fixed transfer rate but with no guarantee of data, and a second transfer mode in which data is guaranteed but transfer rate is not; and a control circuit for controlling the data transfer circuit so as to perform image transfer in the first transfer mode in a case where the image signal generating circuit generates a low-resolution image signal and in the second transfer mode in a case where the image signal generating circuit generates a high-resolution image signal.
Patent CA-2268175-C (CA)
Inventor: NAKAJIMA AKIO
IPC: A61K31/44
Filed: 1997-10-10
Granted: 2002-04-23
Abstract: The present invention relates to a pharmaceutical composition in a unit dosage form for peroral administration in a human or lower animal, having a gastrointestinal tract comprising a small intestine and a colon with a lumen therethrough having an inlet to the colon from the small intestine, comprising: a) a safe and effective amount of a therapeutically active agent incorporated into a compressed, bi-convex tablet, with a maximum diameter of about 4 mm to about 10 mm; b) a non-pH  dependent smoothing coat applied to the tablet to provide a smooth tablet surface free from edges or sharp curves; and c) an enteric polymer coating material comprising at least one inner coating layer and only one outer coating layer; wherein the therapeutically active agent is released at a point near the inlet to, or within the colon; each of the inner coating layer(s) is an enteric polymer that begins to dissolve in an aqueous media at a pH between about 5 to about 6.3; and the outer coating layer is an enteric polymer that begins to dissolve in an aqueous media at a pH between about 6.8 to about 7.2.
Patent CA-2269266-C (CA)
Title: A liquefaction handpiece
Inventor: SUSSMAN GLENN
IPC: A61B17/32
Filed: 1999-04-19
Granted: 2005-02-15
Abstract: A surgical handpiece having at least two lumens mounted to a body. At least one lumen is used for aspiration and at least one other lumen is used to inject heated surgical fluid for liquefying a cataractous lens. A portion of the second lumen is enlarged to form a pumping chamber. The pumping chamber works by boiling a small volume of the surgical fluid. As the fluid boils, it expands rapidly, thereby propelling the liquid downstream of the pumping chamber out of the second lumen. The pumping chamber may use a pair of electrodes, and one of the electrodes may contain a countersink.
Patent CA-2270169-C (CA)
Title: Cartouche d'encre possedant une fonction d'absorption d'encre usee
Inventor: NAKAZAWA CHIYOSHIGE
IPC: B41J2/17
Filed: 1998-08-28
Granted: 2007-04-17
Abstract: L'invention concerne une cartouche (2) d'encre possédant une fonction d'absorption d'encre usée. La cartouche comporte un compartiment (70) formé dans un boîtier (30) de cartouche, qui sert à contenir un élément (20) absorbant l'encre usée et un film (60) plastique formant au moins une partie du compartiment (70). L'élément (20) absorbant l'encre usée, situé dans le compartiment (70), peut être remplacé aisément après que le film (60) plastique a été coupé ou déchiré. Seul un nouveau film (60) plastique doit être fixé à l'intérieur du boîtier (30) après remplacement de l'élément (20) absorbant l'encre usée; ce qui permet d'obtenir une cartouche (2) d'encre plus économique que lorsqu'une plaque en plastique est fixée au boîtier de la cartouche, et permet de réduire les dimensions et le poids de la cartouche.
Patent CA-2274505-C (CA)
Inventor: PARKER TOM RICHARD
IPC: G01K11/12
Filed: 1997-12-16
Granted: 2005-09-27
Abstract: A method and apparatus for measuring the temperature and strain within a structure consists in having optical fibres incorporated in the structure, passing pulses of light down the fibre and detecting the backscattered light. The backscattered light has a changed wavelength i compared with the incident light depending on the strain at the point from where it is backscattered, (the Brillouin shift) and by having a scan rate of an optical scanning filter slower than the repetition rate of the optical pulses and by accurately measuring both the amplitude and frequency of the Brillouin scattered light as a function of time and comparing it with a reference optical fibre it is possible to measure the temperature and strain at positions along the optic fibre. The invention can be used to measure temperature rises and strains induced distributed through a structure.
Patent CA-2275642-C (CA)
Inventor: MUCELLI ALBERTO
IPC: G06K5/02
Filed: 1997-12-04
Granted: 2005-07-26
Abstract: A method for personalizing flat supports by punching, characterised by comprising the following stages: withdrawing from a holder (10, 12) a card (14) to be personalized, transfer ing said card into a punching station (2) in which a bar code is punched corresponding to the data to be personalized, transferring said punched card to a bar code reading station (17), verifying that the bar code read in the reading station corresponds to the bar code memorized in a control unit (30), and if they do not correspond then eliminating said card, or if they do correspond then transferring said card to the punching station (2) for completing the punching cycle with the alphanumerical characters corresponding to the bar code characters.
Patent CA-2286809-C (CA)
Title: Hydrocarbon synthesis using reactor tail gas for catalyst rejuvenation
Inventor: FIATO ROCCO AN
IPC: B01J23/94
Filed: 1998-04-29
Granted: 2005-11-01
Abstract: Hydrogen containing tail gas from a hydrocarbon synthesis reactor is used as a hydrogen containing catalyst rejuvenating gas. If CO is present, the CO content is less than 10 mole % of the gas and the H2 to CO  mole ratio is greater than 3:1. At least a portion of the water and liquid hydrocarbons are removed from the tail gas, before it is used to rejuvenate the reversibly deactivated catalyst.
Patent CA-2288929-C (CA)
Title: Systeme antibrouillage numerique contre le brouillage hf
Inventor: ROSEN MURRAY W
IPC: H04B1/7097
Filed: 1998-06-23
Granted: 2002-09-03
Abstract: La présente invention concerne un système de traitement de signaux numériques assurant une annulation adaptative de tous types de signaux de brouillage concomitants reçus en provenance d'antennes en diversité par un récepteur GPS ou un récepteur (7) à spectre étalé. Dans le dispositif de l'invention, les composantes orthogonales du signal composite reçu sont séparées par le dispositif d'antenne de réception (3) et calés en phase et en amplitude dans le réseau numérique (5) entre l'antenne (3) et le récepteur (7) de façon à annuler les composantes considérées de matière optimale. Le dispositif peut se combiner en synergie avec une technique de filtrage numérique transversal adaptatif permettant principalement d'accroître l'efficacité de la suppression grâce à une réduction des interférences bandes étroites dans la bande. Les composantes orthogonales du signal reçues de la constellation de satellites GPS et des sources de brouillage se combinent dans le dispositif de l'invention de façon à assurer en mode adaptatif une annulation atténuant les sources de brouillage tout en modifiant les signaux GPS reçus.
Patent CA-2289097-C (CA)
Title: Raccord de tiges a epaulement double de couple ultra eleve
Inventor: SMITH JACKIE E
IPC: F16L15/06
Filed: 1998-04-28
Granted: 2007-03-06
Abstract: La présente invention concerne un raccord de tiges à épaulement double de couple ultra élevé (voir figure 1) qui permet de maximiser la résistance à la torsion d'un raccord fileté en mettant en corrélation une section transversale de contre-alésage de la boîte (12) et la clavette (10). La clavette (10) comprend une partie base (74) et une partie pointe (24). La partie pointe (24) définit une zone antérieure transversale (28). Le filetage (22) externe de la clavette présente une conicité maximale de 1/12. La boîtier (12) comprend une zone de contre-alésage transversale (46) et une zone de boîte transversale (52). La résistance totale du raccord de tiges dépend de la résistance à la torsion du raccord fileté, de la zone antérieure transversale (28) et de la zone de contre-alésage transversale (36).
Patent CA-2296701-C (CA)
Title: Needleless connector
Inventor: JEPSON STEVEN C
IPC: A61M39/04
Filed: 1999-05-20
Granted: 2008-10-14
Abstract: A needleless connector (450) is provided which utilizes a resealable preslit septum valve (402). The valve (402) is resiliently restrained relative to a housing (418) with the valve and housing configured to accept a standard male luer lock having a luer tip (18) which penetrates the valve through the opening to extend within the housing and a luer locking flange of the luer lock extending about the housing. The valve (402) includes a disk shaped upper portion (404) covering the opening, a lower portion (406) spaced from the housing (418) and extending downward from the disk shaped portion into a passageway defined by the housing (418), and an annular skirt (408) to attach the septum to the housing. The connector (450) exhibits satisfactory leak pressure after multiple connections and disconnects to the luer lock fitting and long periods of indwell of the luer tip (18).
Patent CA-2297182-C (CA)
Title: Element monobloc formant bouton-poussoir et systeme anti-cliquetis
Inventor: OBITTS SHANE
IPC: F16B7/10
Filed: 1999-07-19
Granted: 2004-09-28
Abstract: Un élément monobloc formant bouton-poussoir et système anti-cliquetis est prévu pour bloquer la longueur des tubes interne et externe d'un ensemble tube télescopique réglable en longueur et pour réduire le jeu et le cliquetis entre lesdits tubes. L'élément se loge dans les tubes interne et externe et un bouton formé sur l'élément traverse une ouverture ménagée dans le tube interne et une des ouvertures formées dans le tube externe pour bloquer de manière réglable la longueur de l'ensemble. Une bague formée sur l'élément se place à l'intérieur du tube télescopique externe pour réduire le jeu et le cliquetis entre les tubes de l'ensemble. L'élément est fabriqué de manière simple et facile sous forme d'un élément monobloc ou d'un élément constitué d'une seule pièce et son installation dans l'ensemble est facile.
Patent CA-2297846-C (CA)
Title: Cluster ablation electrode system
Inventor: RITTMAN WILLIAM J III
IPC: A61B18/02
Filed: 1998-07-24
Granted: 2009-04-28
Abstract: A multiplicity of high frequency electrodes in a cluster configuration may be inserted into tissue of a patient's body for producing heat ablation of abnormal tissue such as a tumor. The electrodes are connected coherently to the voltage output of a high frequency generator. An enlarged ablation volume is accomplished by the electrode cluster with reduced risk of hemorrhage because of the smaller diameter of the individual electrodes of the cluster. The electrodes terminate in conductive tips, which are cooled by a fluid coolant to further facilitate enlarged ablation volumes. Very large ablation volumes are accomplished by this process and apparatus. Various cluster electrode configurations may be adapted to meet specific clinical requirements.
Patent CA-2298110-C (CA)
Inventor: THEURER JOSEF
IPC: E01B29/04
Filed: 2000-02-09
Granted: 2005-12-20
Abstract: A track position correction of a track is carried out while surveying separately the vertical position faults of both rails and concentrating the correction operations on extreme deviations from the desired values. These are lifted, while being delimited by starting and end point (S,E), to a desired vertical position (19) determined electronically and conforming to the adjoining, uncorrected track sections (22).
Patent CA-2300798-C (CA)
Inventor: AURACHER FRANZ
IPC: F16C32/06
Filed: 2000-03-17
Granted: 2005-08-09
Abstract: A device for holding a part comprises a retainer member provided for applying and holding the part and having a convexly spherical surface section which is received in a concavely spherical surface section of a receptacle member. To enable movement of the spherical surface sections relative to one another, the device includes an arrangement for forming a temporary friction-free air bearing between the two surface sections, which can be removed once the surfaces of the two parts have been brought into the desired alignment and engagement to fix the receptacle and retainer members in position.
Patent CA-2300852-C (CA)
Inventor: SCHRAMM PETER
IPC: H04W88/00
Filed: 1998-08-28
Granted: 2009-11-03
Abstract: A method of demodulating voice or data and control information in systems that support multiple modulation schemes modulates voice or data using a first linear modulation scheme, such as 16QAM modulation scheme, and modulates control information using a second linear modulation scheme, for example, QPSK modulation scheme, that has the same symbol rate as that of the first modulation scheme. The first linear modulation scheme has a higher modulation level than the second linear modulation scheme. Information modulated using the second linear modulation scheme, which uses a reduced signal set of the first linear modulation scheme, are demodulated using the same demodulator that is used for demodulating information modulated using the first linear modulation scheme. Also, in-band signalling information within a traffic channel, such as stealing flags, are modulated using the second modulation scheme.