baber/WOPTO huggingface dataset:
Patent CA-2165121-C (CA)
Title: Method of and apparatus for recording and reproducing optical information
Inventor: NODA KAZUO
IPC: G11B7/126
Filed: 1995-12-13
Granted: 1999-04-06
Abstract: In an optical information recording and reproducing apparatus, information is recorded or reproduced by moving a recording medium relative to an optical head.  In order to execute information recording onto the medium in the course of  the  relative  movement  involving  acceleration  and deceleration, the generation timing and intensity of a light beam to be generated in correspondence with the information to be recorded are controlled in response to a varying speed of the relative movement so that data pits to be formed in the recording medium can be standardized in pitch and size irrespective of the relative movement speed.  Also, in order to permit information reproduction from the medium in the course of the relative movement involving acceleration and deceleration, reproduction timing of data read by the optical head is set in synchronism with variation in the relative movement speed so that the data can be reproduced at proper timing irrespective of the relative movement speed.   With such arrangements, there can be achieved a highly increased information    recording/reproduction    speed,    extended information recording area,  reduced size and cost of the apparatus, and reduced power consumption in the apparatus.
Patent CA-2170332-C (CA)
Inventor: DONG DENNIS F
IPC: C23F13/02
Filed: 1996-02-26
Granted: 2008-01-29
Abstract: A concrete article reinforced with a ferrous material in said concrete article can be cathodically protected from corrosion by the application of a coating composite which can be applied, for instance, by thermally spraying a valve metal or alloy thereof together with a catalyst precursor compound onto a surface of said concrete article. Alternatively, the concrete article may be previously or subsequently coated with a catalyst precursor compound to form a separately layered anode coating. Conversion of the catalyst precursor compound to an electrochemically active catalyst occurs during thermal spraying or by the application of the thermally sprayed valve metal or alloy thereof over the previously applied catalyst precursor compound. Connecting the anode coating and the ferrous reinforcing material in the concrete structure to an electrical circuit and impressing a current sufficient to cause the ferrous material to act as the cathode in said circuit provides protection of the ferrous material against corrosion.
Patent CA-2170640-C (CA)
Title: Nmr system for measuring polymer properties
Inventor: DECHENE RONALD L
IPC: G01R33/36
Filed: 1994-08-05
Granted: 1999-11-16
Abstract: A pulsed nmr analysis system (figure 1a) for polymer mate-rials (S2) extracted from industrial processes at a mobility enhanc-ing temperature (figure 3) (at or above glass transition temperature for amorphous polymers, at the crystalline transition temperature for crystalline and semi-crystalline polymers). The sample is measured via nmr techniques and results correlated to viscosity and melt in-dex or melt flow (which are related to average molecular weights). Substantial improvement of correlation of nmr derived constants and equations of a free induction decay curve with the foregoing polymer properties is obtained via (1) conducting the nmr process at a mobility enhancing temperature  (normally elevated compared to the industrial process temperature of the industrial process) and (2) holding temper-ature substantially constant at such elevated temperature.
Patent CA-2175009-C (CA)
Inventor: QUINN STEPHEN JOSEPH
IPC: G01M15/10
Filed: 1996-04-25
Granted: 2003-07-01
Abstract: This invention provides a method and apparatus for testing exhaust emissions of vehicles having internal combustion  engines.    The  apparatus  of  the  present invention comprises a test track over which a vehicle is moved under its own power and remote exhaust testers which  spectroscopically  test  exhaust  emissions  of vehicles as they move over the test track.  The apparatus and method of the present invention preferably may be used for pre-screening vehicles as a first step in a testing  process  utilizing,  as  a  second  step,  more extensive testing as with stationary testing apparatus. Those  vehicles  clearly  meeting  minimum  emissions standards can be relatively quickly screened out by the method  and  apparatus  of  the  present  invention  and exempted from further, more extensive testing.
Patent CA-2175501-C (CA)
Title: Biosensing meter with fail/safe procedures to prevent erroneous indications
Inventor: WHITE BRADLEY E
IPC: C12M1/34
Filed: 1994-05-13
Granted: 1999-11-16
Abstract: A biosensing meter (22) receives a sample strip (10) that includes electrically isolated sense and excitation electrodes (12,14) bridged by a reaction zone.  When a drop of biological sample fluid is placed in the reaction zone, a plurality of fail/safe tests are performed.  A drop size test is performed by a circuit that detects the size of the drop placed in the reaction zone.  The circuit both detects that a drop has been placed in the reaction zone and further measures a test current level, after a delay, to determine that the drop size is sufficient to enable hydration of reactants in the reaction zone.
Patent CA-2177971-C (CA)
Inventor: HEILER DAVID J
IPC: B08B3/08
Filed: 1994-12-28
Granted: 1999-07-27
Abstract: A composition and method for cleaning and disinfecting of contact lenses that employ an electrical field applied to a lens that causes contaminating deposits to migrate therefrom is described. The composition of the invention includes a pair of component materials having different electrochemical potentials wherein the materials are substantially contained in a form wherein each material remains sufficiently physically separated when in contact with opposite sides of the lens such that the difference in electrochemical potential between the two materials is sufficeint to cause charged contaminating deposits to migrate from the lens. The method of the invention requires placing a contaminated lens between a pair of component materials having different electrochemical potentials wherein physical separation is maintained, preferably, by including one of the components in a gel while the other component is in solution or another gel. Preferably one component of the pair of materials is an oxidizing agent while the second component is a reducing agent. An example of a suitable pair is hydrogen peroxide suspended in a carbopol gel and a solution of sodium theosulfate, as the reducing agent. A lens is coatd with the oxidant gel, placed in the reductant solution and held at room temperature for 2-4 hours, wherein the electrochemical field established between the pair achieves about a 29 % protein removal.
Patent CA-2180799-C (CA)
Title: Test tube for determining the erythrocyte sedimentation rate and a surfactant for use therein
Inventor: DUFRESNE CHRISTOPHER
IPC: G01N33/48
Filed: 1996-07-09
Granted: 2001-03-27
Abstract: In an improved method for measuring the erythrocyte sedimentation rate (ESR) a pre-evacuated test tube (T) is used to collect a blood specimen. The tube (T) ismade of a material such as glass or plastics and contains an anticoagulant agent. In order to facilitate mixing of the blood sample a surfactant such as an organo-silicone fluid is provided in the tube (T) as an additive.
Patent CA-2182466-C (CA)
Inventor: HORINKA PAUL R
IPC: B05D1/06
Filed: 1996-07-31
Granted: 1999-05-11
Abstract: An electrically chargeable dielectric coating powder and a triboelectric coating process for applying the powder to wood substrates are described. The coating powder is a mass of finely divided, heat fusible dielectric plastic material having an average particle size (Mv) of between 30 and 45 microns and a particle size distribution (all percents defined in weight percent) of: 95% - 100% smaller than 88 microns, 5% - 15% smaller than 15.56 microns and 0% - 6% smaller than 11 microns. Preferably the coating powder has 0% larger than 88 microns and an Mv = about 30 - 40, preferably 35 - 40 microns. More preferably the particle distribution further includes 10% - 15% smaller than 15.56 microns and 4% - 6% smaller than 11 microns, and an Mv of between about 35 and 36 microns. Most preferably the particle distribution further includes: about 11.5% smaller than 15.56 microns and about 4.3% smaller than 11 microns, and an Mv of about 35.9. Preferably the powder is a thermosetting resin composition.
Patent CA-2183860-C (CA)
Inventor: KEYHL MICHAEL
IPC: G10L19/035
Filed: 1994-10-21
Granted: 2000-04-11
Abstract: Un procédé de codage et de décodage en cascade de données audio consiste à former pour chaque bloc de données présentant un nombre déterminé de données d'entrée temporelles, les composantes spectrales du spectre de courte durée appartenant à ce bloc de données, à former ensuite par quantification et codage le signal codé sur la base des composantes spectrales pour ce bloc de données au moyen d'un modèle psycho-acoustique destiné à commander la répartition des bits pour les composantes spectrales, et enfin à récupérer les données de sortie temporelles par décodage à l'issue de chaque étape de codage et de décodage. Afin d'empêcher une dégradation de la qualité du son dans les cascades de codage et de décodage en plusieurs étapes, un signal d'identification est ajouté au signal codé à chaque phase initiale afin d'indiquer le début d'un bloc de données. Les étapes de codage et de décodage suivantes opèrent la répartition des blocs de données en fonction de ce signal d'identification.
Patent CA-2184423-C (CA)
Inventor: JUNG CHRISTOPHER C
IPC: G05B11/42
Filed: 1996-08-29
Granted: 2003-03-18
Abstract: A process control system according to the present invention uses analog control circuitry in which a differential amplifier stage is incorporated into the feedback path rather that the feedforward path to enable the control of highly non-linear processes that may also exhibit high levels of hysteresis. Such processes often have superior performance characteristics that conventional control circuitry cannot exploit. The present invention additionally incorporates an automatic control circuit which varies the gain of various stages the control circuitry when the output of the process is within a predetermined range. An embodiment of the present invention is used to control anonlinear proportional valve with severe hysteresis. The valve regulates the pressure within pressure-driven ophthalmic surgical instruments, which must be controlledextremely precisely to enable successful eye surgery.
Patent CA-2186588-C (CA)
Title: Novel cationic phospholipids for transfection
Inventor: ASHLEY GARY W
IPC: C07F9/10
Filed: 1995-03-28
Granted: 1999-11-30
Abstract: A novel class of cationic phospholipids and novel method for their synthesis are disclosed. The class of phospholipids comprises phosphotriester derivatives of phosphoglycerides and sphingolipids. It has been unexpectedly found that liposomes comprising one or more of these cationic phospholipids are effective in the lipofection of nucleic acids. These novel phospholipids are particularly attractive because they are not only effective in lipofection, but are extremely cheap and easy to make.
Patent CA-2202508-C (CA)
Inventor: HOSSAIN SOHRAB
IPC: H01M6/48
Filed: 1995-09-29
Granted: 2004-04-06
Abstract: A novel and improved rechargeable, lithium-ion battery system (10) is composed of a plurality of individual electrochemical cells (12a, 12b,...12n) having positive and negative electrodes (14a, 14b,...14n) (16a, 16b,...16n) disposed in opposite face-to-face arrangement with a porous separator (18a, 18b,...18n) containing electrolyte therebetween, and wherein the positive and negative electrodes of adjacent cells are disposed in contact respectively with opposite sides of a common current-collecting element (20a, 20b...20n) forming a unitary bipolar structure. The negative electrode comprises a layer of carbon (24) adhered to one side of the current-collecting element while the positive electrode comprises a layer containing a lithium transition metal oxide or sulfide compound (26) adhered to the other opposite side of the element. The unitary bipolar structures containing the positive and negative electrodes of adjacent cells include outer peripheral, electrically-insulating seal members, preferably in the form of plastic insulating rings (28a, 28b,...28n), which are joined together in a sealed stacked array.
Patent CA-2205736-C (CA)
Title: Prosthetic mounting post for dental implants
Inventor: GROTE PASCALE
IPC: A61C8/00
Filed: 1997-05-20
Granted: 2006-03-28
Abstract: A prosthetic mounting post made from metal for securing to the enossal part of a dental transplant is capable of being adapted to the natural shape of the individual teeth, inasmuch as it ends on the occlusal side in a truncated cone produced by removal of material from a paraboloid of revolution. The truncated cone has in cross-section a semi-elliptical base plane on the labial side and a paraboloid base plane on the lingual side.
Patent CA-2212084-C (CA)
Inventor: BATES JAMES S
IPC: A61B17/22
Filed: 1996-01-30
Granted: 2008-11-18
Abstract: La présente invention concerne un extracteur chirurgical (10) destiné à retirer des objets d'un corps tels que les lithiases rénales et vésiculaires. L'extracteur comprend en son extrémité proximale (12) une poignée (11) pourvue d'un élément coulissant (14) en permettant la manipulation par un médecin. En son extrémité distale (16), l'extracteur comporte une pluralité de fils (24). Chaque fil est constitué, d'une première partie formant un seul toron (22) et d'une seconde partie (24) comprenant une pluralité de filaments. L'utilisation d'un tel panier favorise la saisie d'objets se trouvant dans le corps grâce au large espacement entre fils dans la première partie, favorise la retenue de tels objets dans la seconde partie grâce à la multiplicité des contacts avec l'objet ainsi piégé, et améliore la libération sélective de tels objets sans effet nuisible concernant la fiabilité ou le dimensionnement de l'extracteur.
Patent CA-2212839-C (CA)
Inventor: FRENCH DALE A
IPC: G07B17/00
Filed: 1997-08-13
Granted: 2003-06-17
Abstract: A metering system includes means for printing postage value. First means are coupled to the printing means for accounting for value printed by the printing means. Second means are coupled to the printing means for accounting for value printed by said printing means. Means determine which of the first and the second accounting means accounts for value printed by said printing means. The system may be arranged where the first accounting means is a smart card chip mounted internal to the metering system and the second accounting means is an external smart card. When the system is operable only one accounting system is rendered operable with priority given to the external smart card.
Patent CA-2216394-C (CA)
Title: Method for billing multiple services on a single account
Inventor: FRIEDES ALBERT
IPC: H04M15/00
Filed: 1997-09-24
Granted: 2000-08-22
Abstract: Aggregated billing for calls originating from separate telephone stations (12-20) may be obtained by accessing a segmentation directory (54) upon the receipt of the call at an originating switch (40 1) within a telecommunications network. The segmentation directory contains a table that associates each of a plurality of common account numbers with telephone stations having telephone numbers assigned to the same subscriber. The common account associated by the segmentation directory for an incoming call is used in creation of the billing record for charges associated with the call. The charges contained in the billing records for calls associated with the common account number can be combined to yield an aggregate bill.
Patent CA-2218415-C (CA)
Inventor: RENAUD PHILIPPE
IPC: G01N1/00
Filed: 1997-02-12
Granted: 2006-05-30
Abstract: PCT No. PCT/IB97/00112 Sec. 371 Date Nov. 14, 1997 Sec. 102(e) Date Nov. 14, 1997 PCT Filed Feb. 12, 1997 PCT Pub. No. WO97/28899 PCT Pub. Date Aug. 14, 1997An analysis card containing two mutually separate chambers separated by a frangible partition that is arranged within the card and made of an absorbent and preferably plastic material for absorbing light energy having at least a predetermined wavelength, and converting it into heat energy capable of at least locally removing the material.
Patent CA-2219790-C (CA)
Inventor: KLAYMAN ARNOLD I
IPC: H04S1/00
Filed: 1996-04-26
Granted: 2005-12-13
Abstract: A stereo enhancement system processes the difference signal component generated from a pair of left and right input signals to create broadened stereo image reproduced through a pair of speakers or through a surround sound system. Processing of the difference signal component occurs through equalization characterized by amplification of the low and high range of auditory frequencies. The processed difference signal is combined with a sum signal, generated from the left and right input signals, and the original left and right input signals to create enhanced left and right output signals.
Patent CA-2219830-C (CA)
Title: Filtre a argiles minerales adsorbantes fixees a des surfaces individuelles exposees d'une matrice fibreuse
Inventor: EVERHART DENNIS STEIN
IPC: B01J20/12
Filed: 1996-05-10
Granted: 2006-01-31
Abstract: L'invention concerne un filtre adsorbant pour enlever la caféine d'un liquide. Le filtre est constitué par une matrice perméable aux liquides, en matériau fibreux présentant des surfaces individuelles exposées; par des argiles minérales adsorbantes fixées aux surfaces individuelles exposées du matériau fibreux par des liaisons sensiblement non transitoires de sorte que le passage d'un liquide ayant une concentration en caféine d'environ 20 à environ 100 mg par 100 ml de liquide à travers la matrice avec une durée de contact inférieure à 2 minutes environ, provoque une diminution de la concentration en caféine dans le liquide d'au moins 40 pourcent. La matrice en matériau fibreux peut être choisie parmi les matériaux tissés, tricotés ou les non-tissés. Parmi les argiles minérales adsorbantes, on peut citer les argiles du type bentonite sodique, bentonite calcique ou bentonite acide, ainsi que les bentonites modifiées contenant un agent floculant. D'une manière générale, le filtre peut être conçu pour assurer une réduction d'au moins 40 pour-cent de la concentration de caféine dans un nombre de tasses de liquide allant d'environ une à environ quarante.
Patent CA-2221104-C (CA)
Title: Distillation column employing structured packing which reduces wall flow
Inventor: LOCKETT MICHAEL JAMES
IPC: B01D3/10
Filed: 1997-11-14
Granted: 2001-01-16
Abstract: A heat and/or mass exchange structure which includes a shell having an outer vertical wall with an interior surface,  a plurality of first corrugated packing sheets having an outer edge that is spaced away from the interior surface of the shell, and a plurality of second corrugated packing sheets positioned within the shell and sandwiched between a pair of the first corrugated packing sheets.
Patent CA-2223743-C (CA)
Title: Cigarette and method of manufacturing cigarette for electrical smoking system
Inventor: WRENN SUSAN E
IPC: A24D3/17
Filed: 1996-06-06
Granted: 2004-05-04
Abstract: A method of manufacturing cigarettes comprising the steps of establishing a succession of 2-up hollow plugs (74) in alternating relation to 2-up tobacco plugs (80) and wrapping same in a tobacco web (66) and overwrap (71), severing the resultant continuous rod at mid points of preselected 2-up tobacco plugs and severing again to establish associated pairs of singular tobacco rod plugs (60), separating the members of associated pairs of tobacco rod plugs and placing 2-up filter tipping plugs (240) therebetween, and subsequently wrapping the interposed 2-up filter tipping plug together with adjacent portions of t he singular tobacco rod plugs and severing the resultant tipped structure into individual cigarettes. Also provided are cigarettes construct ed in accordance with the novel method.
Patent CA-2230423-C (CA)
Inventor: HORTON JEFFREY KENNETH
IPC: C12Q1/00
Filed: 1998-02-24
Granted: 2007-02-06
Abstract: A method of assaying for an analyte comprises the steps of: i) mixing a sample of cells possibly containing the analyte with a cell lysis reagent to provide a cell lysis fluid, ii) mixing the cell lysis fluid with reagents, including a specific binding partner of the analyte for binding to the analyte, for performing a specific binding assay for the analyte, iii) and mixing the cell lysis fluid with a sequestrant for the cell lysis reagent, whereby the binding of step ii) is performed in the presence of the sequestrant.
Patent CA-2230441-C (CA)
Inventor: RUJAKARUNA SARATH
IPC: F16J15/34
Filed: 1996-08-30
Granted: 2008-02-19
Abstract: A mechanical seal is disposed in surrounding relationship to a pump shaft (14) within an enlarged-bore seal chamber (16) defined by the pump housing (11) to create a sealed relationship therebetween. The mechanical seal includes a gland ring (25) stationarily fixed to the pump housing (11) for closing off an outer end of the enlarged-bore seal chamber (16). An annular erosion protector (41) is disposed within the enlarged-bore chamber in close and generally overlapping relationship to the inner axial face of the gland ring (25). This annular protector (41) has radially projecting protrusions (66) which project axially inwardly along the outer portion of the enlarged-bore chamber (16), and also preferably has an annular part (61) which projects radially inwardly so as to effectively cover substantially the entire inner face of the gland ring (25). The erosion protector (41) is effective in significantly eliminating direct erosion-contact of pump fluid against both the gland ring (25) and the surrounding wall (17) of the seal chamber (16).
Patent CA-2234552-C (CA)
Inventor: IZQUIERDO RICARDO
IPC: B01D71/00
Filed: 1998-04-08
Granted: 2001-03-06
Abstract: A composite membrane is disclosed fabricated by depositing an inorganic ion-conducting thin film on a cation-selective  organic  polymer  membrane  substrate using  Pulse  Laser  Deposition  (PLD)  or  reactive magnetron sputtering. The fabricated membrane combines the  advantages  of  the  polymeric  membrane  including flexibility and low electrical resistance,  with the advantages of the inorganic membrane film including resistance  to  fouling,  high  selectivity  for  alkali metal  ions  over  hydrogen  ions  and  resistance  to oxidizing  chemicals;   electromembrane   systems   and processes for example alkali metal sensing electrodes and  other  membrane-based  electrochemical  detectors, electrolytic and electrodialytic systems   incorporate such  membranes  thus  improving  their  performance  in terms of current efficiency,  salt to acid conversion ratio,   reliable   operation   and   membrane   life.
Patent CA-2235591-C (CA)
Title: Serial multi-gb/s data receiver
Inventor: PIKE RODNEY DAVID
IPC: H03K3/28
Filed: 1996-05-01
Granted: 2000-07-18
Abstract: A data pulse receiver for detecting and amplifying serial data pulses received at gigabit-per-second rates over a transmission medium through which the signal levels have been substantially attenuated. The receiver, in a preferred embodiment, has grounded base differential amplifiers to give impedance matching, signal amplification and wide frequency bandwidth. A regenerative flip-flop with programmable tail current provides hysteresis in order to suppress unwanted noise signals. The flip-flop also returns the data pulses to NRZ format. The receiver may also include means for automatic adjustment of the hysteresis level.