baber/WOPTO huggingface dataset:
Patent CA-2007220-C (CA)
Inventor: JOHNSON WILLIAM B
IPC: A61C5/50
Filed: 1990-01-05
Granted: 1999-01-12
Abstract: An improved appliance for use in applying filler material, such as gutta-percha or the like, to an endodontically prepared root canal of a tooth in the form of an elongated shaft of material having high biological tolerance, the shaft having a handle portion at the proximal end portion, the shaft distal end portion having a surface configuration adaptable to retain filler material formed thereon and being positionable in a root canal, the shaft distal and proximal portion being severable from each other whereby the distal portion and filler material therein remain in the root canal.  In the preferred arrangement the shaft distal portion surface is defined by a spiral groove.
Patent CA-2010558-C (CA)
Title: Dielectric ceramic material and method of producing same
Inventor: SUGIYAMA MASAAKI
IPC: H01P7/10
Filed: 1990-02-21
Granted: 1994-04-05
Abstract: DIELECTRIC CERAMIC MATERIAL AND     METHOD OF PRODUCING SAME     ABSTRACT OF THE DISCLOSURE    A dielectric ceramic material essentially consists of a complex perovskite compound mainly composed of Ba(Mg1/3 Ta2/3)O3 phase and 0.005 to 1.0% by weight of phosphorus with reference to the complex perovskite compound.     As one of the dielectric properties, the unloaded Q value reaches 37000 at a measuring frequency of 10 GHz and the temperature coefficient of the resonant frequency is about 4 ppm/°C.
Patent CA-2010901-C (CA)
Title: Fluid additive and method for treatment of subterranean formations
Inventor: HIMES RONALD E
IPC: C09K8/74
Filed: 1990-02-26
Granted: 2000-04-11
Abstract: A method of substantially preventing the adsorption of polysaccharides or removing polysaccharides from clay surfaces in subterranean formations which are present as a result of contact by gravel packing, fracturing or other treatment fluids, by contacting the formation with a treatment fluid containing at least one member selected from the group consisting of tetraalkylammonium halides wherein the alkyl radical is selected from methyl, ethyl, propyl and butyl radicals and trimethylammonium halides present in an amount sufficient to substantially remove any polysaccharides adsorbed by said clays whereby the permeability of the formation is substantially maintained.
Patent CA-2018121-C (CA)
Title: Method of recovery of hydrocarbons from contaminated soil or refuse materials
Inventor: IGNASIAK TERESA
IPC: B09C1/02
Filed: 1990-06-01
Granted: 1995-07-04
Abstract: A method is provided for separating an inert solid substantially inorganic fraction comprising sand or soil from a tarry or oily organic matter in a feedstock.  The feedstock may be contaminated soil or tarry waste.  The feedstock is combined with pulverized coal and water.  The ratio (oil or tar to dry weight of coal) of about 1.0:10 to about 4.0:10 at a temperature in the range of 60-95°C.  The mixture is agitated, the coarse particles are removed, and up to about 0.10% by weight (based on weight of coal) of a frothing agent is added.  The mixture is then subjected to flotation, and the froth is removed from the mixture.
Patent CA-2022435-C (CA)
Title: Spreadable material package with spreader
Inventor: CAMPBELL ROLF W J
IPC: B65D75/48
Filed: 1990-08-01
Granted: 1994-09-13
Abstract: A spreadable material package includes a first and a second sheet joined together to form a chamber for holding the spreadable material.  The package includes a spreader portion at one end that is in flow communication with the chamber so that spreadable material can flow from the chamber to the spreader portion.  The package includes  a  stiffening  portion  having  spaced  apart indentations for providing a stiffening effect to the spreader portion.
Patent CA-2026044-C (CA)
Inventor: MUDGE PAUL R
IPC: C08K3/00
Filed: 1990-09-24
Granted: 1991-06-16
Abstract: Carpet coating compositions are disclosed which comprise 40 to 80 percent by weight filler and 20 to 60 percent by weight of a latex binder, the binder comprising an emulsion polymer of a)  40 to 80% by weight of a vinyl ester of an alkomoic acid, the acid having from 1 to 13 carbon atoms; b)  5 to 25% by weight of a copolymerizable comonomer having a Tg of at least 50°C; and; c)  10 to 30% ethylene.
Patent CA-2028873-C (CA)
Title: Equalizer
Inventor: MURAKAMI KEISHI
IPC: H04L25/03
Filed: 1990-10-30
Granted: 1994-10-04
Abstract: An adaptive equalizer comprising a computing unit which receives a known signal sequence to estimate transmission channel characteristics and effect compensatory control of tap coefficients by use of a first algorithm that has fast convergence property, and a tap coefficient computing unit for making compensation for relatively slow changes in a random data input after the compensation for the transmission channel characteristics, which either employs an algorithm that involves a relatively low computational complexity or intermittently executes computation.
Patent CA-2029084-C (CA)
Title: Process for preparing 1,2,3,4-butanetetracarboxylic acid
Inventor: CASANOVA EDUARDO A
IPC: C25B3/29
Filed: 1990-10-31
Granted: 2001-08-07
Abstract: Butanetetracarboxylic acid with acceptably low levels of color-causing contaminants, suitable for permanent press agent use, is prepared in high conver-sion and yield from tetraalkyl butanetetracarboxylates by a series of steps including purification of precursor material, hydrolysis with high concentration of acid catalyst, and oxidative purification of product.
Patent CA-2030914-C (CA)
Inventor: HIROSE YUSUKE
IPC: G01N23/20
Filed: 1990-11-27
Granted: 1998-05-19
Abstract: A method for estimating the press formability of galvannealed steel sheets provided, wherein: the values found by: , and wherein I(~) = the total X-ray diffraction intensity of the ~ phase, I(~) = the total X-ray diffraction intensity of the ~ phase, IB(~)= the background X-ray diffraction intensity of the ~ phase, IB(~)= the true X-ray diffraction intensity of the ~ phase, I(~) - IB(~) = the true X-ray diffraction intensity of the ~ phase, ~ = the ~ phase of an Fe-Zn intermetallic compound in coating of galvannealed steel sheet, and ~ = the ~ phase of the intermetallic compound, are used as an index to determine the press formability.
Patent CA-2041682-C (CA)
Title: Low pressure lost foam moulding process for aluminum alloy parts
Inventor: GARAT MICHEL
IPC: B22C9/08
Filed: 1991-05-02
Granted: 1996-01-16
Abstract: The invention relates to lost-foam casting of metal pieces, particularly from aluminium alloy. 
<??>It relates to aluminium-alloy pieces having a wide solidification range (gap) and having a high ratio of length to modulus over the path between the point where the contraction cavity forms and the riser (feeder) and consists in applying a gaseous pressure to the mould of between 0.1 and 0.5 MPa. 
<??>It permits the production, in particular, of motor-vehicle cylinder heads having no pinholes (pitting) or porous (spongy) contraction cavity, and of all pieces with high-performance mechanical properties. 
<IMAGE>
Patent CA-2043054-C (CA)
Title: Phase-lock loop device operable at a high speed
Inventor: ICHIYOSHI OSAMU
IPC: H03H17/02
Filed: 1991-05-22
Granted: 1994-12-06
Abstract: Abstract of the Disclosure:       In a phase-lock loop device for phase locking a device input signal (11) representing a first complex number and having a device input phase which should be locked into a locked phase, a first complex multiplier (14) calculates a first product of the first complex number and a first conjugate complex number to produce a first complex product signal.  The first conjugate complex number is represented by a first conjugate signal which is produced by delaying and processing the device input signal. A second complex multiplier (18) calculates a second product of a phase processed signal and a multiplier input signal to produce a second complex product signal.  The phase processed signal is produced by filtering and processing the first complex product signal.  The multiplier input signal is produced by delaying and limiting the second complex product signal.          A third complex multiplier (22) calculates a third product of the first complex number and a second conjugate complex number to produce a third complex product signal.  The second conjugate complex number is represented by a second conjugate signal which is produced by processing the second complex product signal.          A fourth complex multiplier (24) calculates a fourth product of the second complex product signal and a filtered signal to produce a fourth complex product signal having the locked phase.  The filtered signal is produced by filtering the third complex product signal.
Patent CA-2050805-C (CA)
Title: Burner flame sensing system and method
Inventor: CORMIER KENNETH C
IPC: G01J1/42
Filed: 1991-09-06
Granted: 1998-02-10
Abstract: The presence of a flame from a burner is determined by analyzing the signal produced by a radiation sensor aimed at a burner.  Specifically, a Fourier transformation is applied to the signal producing amplitude values for a spectrum of component frequencies produced by changes in the power of the flame over time.  A logarithmic value is derived for each of the amplitude values.  The degree of linearity of the distribution of the component frequency logarithmic amplitude values provides an indication of the flame presence.  Several parameters, including integrated linear error, linearity regression correlation and slope difference, provide an indication  of the degree of linearity.  A plurality of values for each of these parameters are produced during an interval of time.  When a given percentage of the parameter values are above their respective thresholds the flame is determined to be present, whereas when another given percentage of the parameter values are below their respective threshold the flame is determined to be extinguished.
Patent CA-2057510-C (CA)
Title: Catalyst for purifying exhaust gas
Inventor: NAKANO MASAO
IPC: B01D53/94
Filed: 1991-12-12
Granted: 1998-12-01
Abstract: A catalyst for purifying an exhaust gas to remove nitrogen oxides, carbon monoxide and hydrocarbons from an oxygen-rich exhaust gas containing nitrogen oxides, carbon monoxide and hydrocarbons comprising (i) a zeolite having an SiO2/Al2O3 mole ratio of at least 15 and (ii) (a) cobalt, (b) a rare earth metal and (c) silver, or nickel and/or zinc, or platinum and/or manganese, or copper and/or rhodium, incorporated thereinto.
Patent CA-2058227-C (CA)
Title: Method of preparing alkoxyphthalocyanine
Inventor: OGUCHI TAKAHISA
IPC: C09B47/073
Filed: 1991-12-20
Granted: 2001-03-06
Abstract: There is here disclosed a method for preparing an alkoxyphthalocyanine represented by the formula (1):   (see formula I) wherein each of Rs is independently a secondary alkyl group having 3 to 20 carbon atoms, Met is a divalent metal atom or an oxy metal, and the substitution positions of -ORs are the 1- or 4-position, the 5- or 8-position, the 9- or 12 position, and the 13- or 16-position, which comprises the steps of heating a mixture of 3-alkoxyphthalonitrile and an organic base in an alcohol to 90-120°C, adding a metal derivative at the same temperature, and then carrying out reaction, or alternatively the step of reacting a mixture of a 1,3-diimino-4-alkoxyisoindoline and a metal derivative in the presence or absence of an organic base in an aliphatic alcohol having 6 or more carbon atoms. In addition, the ratio of isomers of the alkoxyphthalocyanine can be controlled by regulating the addition time of the organic base.
Patent CA-2059510-C (CA)
Title: Use of nadh and nadph as energy substitutes
Inventor: BIRKMAYER JOERG
IPC: A23K1/16
Filed: 1992-01-16
Granted: 1997-06-10
Abstract: Use of nicotinamide-adenine-dinucleotide in its reduced form (NADH) and/or nicotinamide-adenine-dinucleotide phosphate in its reduced form (NADPH) and/or a physiologically compatible salt thereof for energy substitution in the human or animal body, as well as a food or drink for human consumption or a feed for animal consumption having a content of said substances.
Patent CA-2061769-C (CA)
Title: Three component aminoamide acrylate resin compositions
Inventor: FRIHART CHARLES R
IPC: C09J177/00
Filed: 1992-02-25
Granted: 2002-12-10
Abstract: This invention provides acrylate-modified polyamide resins comprising the Michael addition product of a mixture of a thermoplastic polyamide and reactive diluent with a polyol ester having a plurality of acrylate ester groups, wherein the mole ratio of the initial acrylate groups of the polyol ester to the initial amino groups of the thermoplastic polyamide ranges from about 0.5 to about 8, and wherein from about 1a to about 25% by weight of the resin is polyamide of the reactive diluent. The diluent comprises one or more mono- and di-substituted amines of 10 to 44 carbon atoms.
Patent CA-2063019-C (CA)
Title: A process for production of an ether-rich additive
Inventor: MARQUEZ MARCO A
IPC: C07C41/06
Filed: 1992-03-13
Granted: 1999-07-13
Abstract: A process for the production of an ether-rich additive for gasoline, and more particularly, the production of TAME from light hydrocarbon streams comprising admixing the light hydrocarbon stream, preferably from an FCC feedstock, prior to distillation of the feedstock with an alcohol in a C5 feedstock and contacting the feedstock with a catalyst under etherification process conditions.
Patent CA-2069745-C (CA)
Title: Taper-bead seat rim and assembly thereof with a tire
Inventor: BILLIERES JEAN
IPC: B60B21/10
Filed: 1991-11-08
Granted: 2001-01-09
Abstract: A single-piece wheel rim (J') having tapered seats (2') inclined at 15° U 1° with greatly reduced axial widths (P') relative to the axial widths (P) of known tapered seats (2), and having a reduced height (H') mounting well (3') leaving more room for the brake elements. A wheel rim (J') of this kind can be combined with a tyre (T) having beads with truncated toes to provide beads with greater fatigue strength while allowing easy mounting. The invention relates to tyres and wheel rims for heavy vehicles.
Patent CA-2078874-C (CA)
Title: Battery protection system
Inventor: BETTON ARNOLD L
IPC: H01H3/26
Filed: 1991-04-03
Granted: 1995-05-16
Abstract: A vehicle storage battery protection system that senses a drop in battery voltage (20) to a level at which the battery still re-tains sufficient power to start the vehicle. If the sensed voltage remains at or below this level for a time greater than the time nor-mally required to start the vehicle, the battery (10) is disconnected from the load (14) and a hysteresis signal (34) is provided to prevent a reconnection as the battery voltage begins to rise after the load has been disconnected. The load is automatically recon-nected to the battery upon operation of the ignition switch (18) to restart the vehicle. A reset circuit provides a small test voltage (44) to the disconnected load, and senses a voltage drop caused by operation of the ignition switch to start the vehicle. This sensed voltage drop is detected and causes a main switch (12) to reconnect the battery to the loads.
Patent CA-2079138-C (CA)
Inventor: BUCHWALD HOLGER
IPC: H01B7/28
Filed: 1992-09-25
Granted: 1996-11-05
Abstract: A swellable cable wrap on fleece basis includes on one side an applied layer of binder which covers 10 to 20%  of the surface of a superabsorbent layer in form of a regular, repeated pattern of points, lines or bars.  The printed binder pattern is either applied onto the superabsorbent or is even therewith.  In a process for the manufacture of such a cable wrap, the binder pattern is printed onto the superabsorbent by way of a template.  The superabsorbent layer is substantially freely accessible to water so that at least 90% of the total swelling height of the cable wrap is reached within a minute of exposure to water.  At the same time, the superabsorbent does not detach from the carrier layer and powder out during manufacture and handling of the wrap.
Patent CA-2089910-C (CA)
Title: Ultrasonic driving motor
Inventor: HONDA KEISUKE
IPC: H02N2/16
Filed: 1993-02-19
Granted: 1997-12-23
Abstract: A rotor  2  comprises a resilient  ring frame 2a having a separate portion 2c and  having plural  slide projection  2b.  The  slide  projections  are  contacted with the edge face of the piezoelectric vibrator 1 by opening the separate portion 2c of the rotor 2.       In the ultrasonic driving motor, when the AC power  is   applied to   the   electrodes   of   the piezoelectric vibrator   1,    progressive   wave   is generated   on   the   edge   and   side   faces   of   the piezoelectric  vibrator  1  and  the  rotor  2  is  rotated with the progressive wave.  Accordingly,  a rotary shaft 4 is  attached  to  a  supporting  member  3  and  rotary power is taken out of the rotary shaft 4.
Patent CA-2090964-C (CA)
Title: Abrasive tool
Inventor: SEXTON JOHN STIRLING
IPC: B23D61/18
Filed: 1991-09-18
Granted: 1999-03-23
Abstract: An abrasive tool such as a grinding wheel or a saw is characterised by the worki ng portion comprising a mass of ultra-hard abrasive particles dispersed in a non-porous thermoplastic polymer matrix. Examp les of suitable thermoplastic polymers are polyethereketone, polyaryletherketone, poly(amide-imide), polyphenylene sulphide , liquid crystal polymer and mixtures thereof.
Patent CA-2093324-C (CA)
Inventor: COOK ANTHONY VENESS
IPC: F16C13/02
Filed: 1991-10-03
Granted: 2003-08-05
Abstract: A bearing housing assembly end unit for a roller comprises a housing, a roller thrust bearing provided in the housing and having an outer race, a roller cage and an inner race provided in the housing with the components being relatively rotatable. A washer holds the components in the housing, and springs are held in the housing so as to transmit force to at least one of the components so as to urge the components relative to the housing. The spring is preferably a frusto-conical spring and the roller thrust bearing is preferably a taper roller bearing.
Patent CA-2094318-C (CA)
Inventor: BOO H KHIM
IPC: B03B9/06
Filed: 1993-04-19
Granted: 2001-10-23
Abstract: A novel process has been found wherein multilayer plastic materials are efficiently and effectively separated. The multilayer plastic materials are divided into smaller particles, the particles are agglomerated and then like particles are separated from the other particles.      This novel method is useful for recycling multilayer extruded plastic materials.
Patent CA-2095054-C (CA)
Inventor: JUDD IAN DAVID
IPC: H04L69/40
Filed: 1993-04-28
Granted: 1999-01-26
Abstract: An error recovery method for use  in an information communication system which comprises a plurality of nodes connected by links.  Information is transferred between the nodes in frames of predefined types,  including at least a first frame type used to transfer data and a second frame type used for error recovery. Each node has at least a first and a second mode of operation, in the first mode frames of both first and second types are accepted, in the second mode frames of the first type are discarded and only frames of the second type are accepted. A master node which controls error recovery is selected from amongst those nodes which can initiate transfers.
Patent CA-2102942-C (CA)
Inventor: LUM SANFORD S
IPC: G09G5/02
Filed: 1993-11-12
Granted: 1999-08-03
Abstract: The present invention relates to a method of converting signal components of one of a first input three component color model signal and a second input three component color model signal to either one of the first or second three component color model comprised of matrix multiplying input signal components with an array of predetermined transformation parameters to form a multiplied set, vector adding the multiplied set with a predetermined group of offset vectors, whereby signal components of the output signal are produced.
Patent CA-2103363-C (CA)
Title: Treuil pour remorquage d'objets immerges
Inventor: WARNAN FRANCOIS
IPC: B63B21/66
Filed: 1992-04-30
Granted: 2003-12-16
Abstract: L'invention concerne les treuils qui permettent de re- morquer derrière un bateau un poisson muni d'un sonar. Elle consiste à mesurer l'assiette (118) au niveau du poisson (117) et à commander à partir de cette mesure un vérin d'asservisse- ment (106) qui vient modifier l'inclinaison de la flèche pour maintenir cette assiette constante. Elle permet de diminuer les à-coups de l'effort de traction applique au câble qui remor- que le poisson.
Patent CA-2104090-C (CA)
Inventor: FORRESTER GLENN C
IPC: G01N33/497
Filed: 1993-08-13
Granted: 2003-11-04
Abstract: A method and apparatus for measuring the concentration of breath alcohol or other reactants is provided in which a breath sample is introduced to a fuel cell, wherein the number of electrons from the fuel cell resulting from oxidation of the alcohol in the breath rises to a peak and thereafter falls to a substantially steady minimum base to form a curve. The present method is based on the discovery that this curve, regardless of reactant concentration or age of fuel cell, is a log-normal distribution curve.
Patent CA-2107465-C (CA)
Inventor: LINDAL WALTER
IPC: E04B1/72
Filed: 1992-03-06
Granted: 1999-06-29
Abstract: What is disclosed is a wide variety of roofing planks, siding planks and floor planks (7) connected to rafters, studs and joists (9) without visible nails (13). Planks may be covered with sheet metal (4), which is not pierced by nailing. The building system is improved further by taking advantage of the tendency for resawn (5) planks to cup.
Patent CA-2108302-C (CA)
Title: Ink jet recording apparatus
Inventor: KAMIYAMA YUJI
IPC: B41J2/05
Filed: 1993-10-13
Granted: 2000-12-19
Abstract: A driving voltage of a discharging heater in an ink jet recording head is set according to property of the individual recording head. More specifically, sub-heaters are formed on a board on which discharging heaters are formed, by a same process as that for the discharging heaters. Resistance values of the sub-heaters are read so that the driving voltage of the discharging heaters can be set on the basis of the read resistance values.
Patent CA-2109697-C (CA)
Title: Oral-administration forms of a medicament containing pantoprazole
Inventor: DIETRICH RANGO
IPC: C07D401/00
Filed: 1992-06-13
Granted: 2005-11-22
Abstract: The invention relates to oral presentation forms for pantoprazole, which consist of a core, an intermediate layer and an outer layer which is resistant to gastric juice.
Patent CA-2110539-C (CA)
Title: Moisture-setting fusible adhesive compositions
Inventor: CHENARD JEAN-YVES
IPC: C08G18/62
Filed: 1993-12-02
Granted: 1999-11-16
Abstract: Hot-melt adhesive composition based on an EVA copolymer and polyisocyanate, characterised in that the said EVA copolymer is a copolymer with a melt index at 190@C of between 100 and 1000 and containing, relative to the weight of the said copolymer:     1) 10 to 90 % of ethylene,   2) 10 to 40 % of vinyl acetate, 3) 5 to 20 meq. OH of an ethylenically unsaturated termonomer bearing at least one primary hydroxyl functional group per mole, the said composition containing substantially no free hydroxyl functional group.
Patent CA-2114528-C (CA)
Inventor: BROWN WILLIAM M
IPC: G01S13/87
Filed: 1992-09-03
Granted: 1996-09-24
Abstract: Synthetic aperture radar data is used in conjunction with altimeter data (a) to produce a terrain map corrected for platform roll angle. The technique uses two synthetic radar antennas (21, 22) and a ranging altimeter (23) placed on an aircraft. The aircraft is moved in a set of substantially parallel flight paths where each flight is directly over the strip of terrain viewed by the synthetic aperture radar of an adjacent flight. During each flight the at least one antenna repeatedly transmits radar signals whose return echoes are received by both the first and second antennas.  Conventional synthetic aperture radar processing yields a terrain map uncorrected for roll angle.  The uncorrected terrain map data from one flight are compared with the altimeter data taken during an adjacent flight.  This roll angle measure is then used to correct the height and ground range of nearby points in the uncorrected terrain map.