baber/WOPTO huggingface dataset:
Patent CA-2008915-C (CA)
Inventor: WOLINSKY HARVEY
IPC: A61F2/958
Filed: 1990-01-30
Granted: 1996-06-11
Abstract: A method and catheter for use in practising the method are provided by which a highly concentrated medication or chemotherapeutic agent can be applied locally under sufficient pressure to cause the medication or agent to penetrate into the localized tissue.  The total volume of medication or agent is quite small, well below levels that might cause an adverse reaction in other parts of the body.  The catheter includes a thin walled flexible balloon having a plurality of minute holes through which medication may flow at a low flow rate.  The balloon is inflated with the medication under pressure and the low flow rate of the order of a few ccs per minute is controlled by the minute holes in the balloon.  In practising the method of the invention, the balloon is selected such that its inflated diameter will correspond to or be slightly greater than the diameter of the lumen into which it is to be placed so that when the balloon is inflated, it will contact intimately the surface of the lumen. Inflation of the balloon with the medication will cause a thin film to spread between the balloon and the lumen, the film being maintained under a sufficient pressure to penetrate significantly the surrounding tissue with a high concentration of medication.  The quantity of medication that ultimately flows free into the lumen is quite small and is insufficient to cause any other damage to the patient.
Patent CA-2019671-C (CA)
Title: Oxidative denaturation of protein analytes
Inventor: ELTING JAMES JAY
IPC: C07K16/00
Filed: 1990-06-22
Granted: 2002-08-13
Abstract: A method for conferring or increasing the antigenicity of a disulfide-crosslinked protein by treating the protein with an oxidizing agent, such as periodate, having an oxidation potential sufficient to cleave disulfide linkages. Excess oxidizing agent is then inactivated by addition of a reducing agent. The resulting protein exhibits an increase in its ability to be bound by select antibodies, particularly monoclonal antibodies directed to linear peptide epitopes in the protein.
Patent CA-2022077-C (CA)
Title: Desoldering device
Inventor: POOSTPASAND HAMID
IPC: B23K1/018
Filed: 1990-07-26
Granted: 2000-10-10
Abstract: A desoldering tool has a removable cartridge and a base unit having an assembly interior including a solder collection chamber and a removable vacuum source for developing a vacuum in the bottom of the chamber under a removable porous solder retention pad, the cartridge having a temperature self-regulating heater therein and a tail pipe extending from a tip of the cartridge to a position above the solder collection chamber, and a vacuum seal between the cartridge and the base unit to maintain the vacuum and reduce transfer of heat from the tip.
Patent CA-2023912-C (CA)
Title: Method and apparatus for quantitatively dividing bread dough
Inventor: HAYASHI TORAHIKO
IPC: A21C5/00
Filed: 1990-08-23
Granted: 1994-08-23
Abstract: A method and apparatus is provided for quantitatively dividing bread dough.  The apparatus includes a hopper having vertical side walls.  The internal space surrounded by the walls has the same horizontal sectional area at any position along the vertical walls.  The apparatus also includes a pair of vertical conveyors extending along the side walls.  A dough outlet is formed in the bottom wall of the hopper.  A dividing device is located in close proximity to the dough outlet.     The vertical conveyors are driven at a speed of X m/ min, in line with the speed of the dough flowing downward on its same level.  The dough is continuously and quantitatively divided by the dividing device into small pieces.  Each of the dough pieces is then conveyed toward the shaping station.  Thus the dough can be quantitatively divided so that a high quality dough is obtained without the gel structure of the gluten being destroyed.
Patent CA-2025961-C (CA)
Inventor: AASE BRENDA L
IPC: A61F2/958
Filed: 1990-09-21
Granted: 1996-07-30
Abstract: A small diameter dilatation catheter for coronary angioplasty is achieved by providing first and second elongated flexible, thin-wall tubes, each having one or more reinforcing wires encapsulated in the walls thereof and dimensioned such that the second tube may be coaxially disposed within the lumen of the first tube.  The preferred material from which the two tubes are  fabricated  is  polyimide.    The  longitudinally extending  reinforcing wires  provide  the  requisite "pushability"   characteristics   required   by   PTCA dilatation catheters.  The balloon or inflation member has its proximal end bonded to the outer surface of the outer tube and its distal end bonded to the outer surface of the tube.   Inflation fluid then may be perfused between the I.D. of the outer tube and the O.D. of the inner tube.
Patent CA-2028415-C (CA)
Title: Chemically bonded superabrasives grit
Inventor: CHEN SY-HWA
IPC: C09C1/68
Filed: 1990-10-24
Granted: 1999-01-12
Abstract: Superabrasive grits such as diamond or CBN is chemically bonded with a coating such as tungsten which is in turn bonded to a tool body providing superabrasive cutting tools such as saw blades, grinding wheels, drill bits and the like.
Patent CA-2031569-C (CA)
Title: Method and means for introducing treatment fluid into a subterranean formation
Inventor: SNIDER PHILIP M
IPC: E21B34/06
Filed: 1990-12-05
Granted: 1994-07-26
Abstract: Method and apparatus for introducing treatment fluid into a subterranean formation by use of a reverse jet pump loca ed in a bypass of a tubing string.  A plug in the tubing between the inlet and outlet of the bypass forces production fluid to flow through the bypass.   When operation of the jet pump is terminated treatment fluid introduced into the tubing string causes a sleeve to slide down over the inlet and outlet, isolating the bypass.  The plug is then forced out the tubing, leaving a clear path for the treatment fluid down the tubing and out the casing perforations into the formation.  This arrangement enables rapid changeover from pumping formation fluid to introducing treatment fluid.
Patent CA-2034282-C (CA)
Title: Microwave transmission line and method of modulating the phase of a signal passed through said line
Inventor: NEIFELD RICHARD A
IPC: H03C7/02
Filed: 1991-01-16
Granted: 1994-10-18
Abstract: A microwave transmission line is provided including a class of dielectric materials known as relaxor dielectrics having very high dielectric constants of greater than 1000, low dielec-tric loss and large variations of the real part of the dielectric constant with varying temperature.  The phase of a microwave sig-nal passed through such a transmission line is modulated by sub-jecting the transmission line to light that is absorbed in the dielectric layer causing a variation in the dielectric constant and a change in the velocity of the continuous microwave signal passing through the transmission line.
Patent CA-2036447-C (CA)
Inventor: LETENDRE MICHEL
IPC: B23D49/08
Filed: 1991-02-15
Granted: 1994-08-16
Abstract: The disclosure herein describes an attachment assembly for mounting to a conventional bench saw; the assembly comprises a rigid member which is mounted to the power-operated main shaft of the bench saw.  The member has two projecting rods at one end thereof which are adapted to slide on a pair of guiding pins mounted on a movable structure of the bench saw; the function of the pins is also to fixedly secure the rigid member to the movable structure after the attachment is installed and the tool is fixedly set for a cutting operation. The cooperation of the projecting rods with the guiding pins is such as to prevent vertical,  lateral and angular movements of the member which would otherwise appear because of the reaction forces exerted during the cutting operation.
Patent CA-2042158-C (CA)
Title: Polymer stabilizer and polymer composition stabilized therewith
Inventor: BAE KOOK-JIN
IPC: C08K5/57
Filed: 1991-05-09
Granted: 2002-09-17
Abstract: Stabilizer compositions including blends of sodium perchlorate hydrate and calcium silicate are disclosed. Free flowing powder compositions of reduced hazard level including calcium silicate, non-absorbing diluent powder such as calcium carbonate, and a solution of sodium perchlorate in water are also disclosed. Vinyl halide compositions especially those used for motor vehicle components having improved long term stability at moderate aging temperatures of about 180°F to about 275°F, and processes for preparing such compositions, are also disclosed.
Patent CA-2048835-C (CA)
Inventor: JOHNSON ALFRED E
IPC: A41G1/00
Filed: 1991-08-08
Granted: 1996-08-27
Abstract: A novel mechanism and related processes for joining naturally grown and artificially produced parts to create aesthetically appealing, naturally appearing, large artificial plants, such as trees.  A novel joint mechanism provides the appearance of naturally occurring outgrowth of branches and the like from proximally disposed trunks and stems.  A method for bending and forming artificial foliage provides a more airy, naturally appearing leaf pattern around the crown of a plant.
Patent CA-2056887-C (CA)
Title: Quick-action clamping device i
Inventor: MERKEL GERD
IPC: B41F27/12
Filed: 1991-12-03
Granted: 1999-08-10
Abstract: The invention relates to a quick-action clamping device for fastening printing plates in printing machines comprising a fixedly arranged upper clamping bar (1) and a displaceable lower clamping bar (2). Tn order to obtain a defined clamping force and a set-up permitting automation said lower clamping bar (2) is pressed into a clamping position by means of spring elements (3) having a holding force necessary to hold printing plates (11) and brought into a plate-changing position by means of at least one re-set element (4, 4', 4 ") acting against said holding farce.
Patent CA-2063283-C (CA)
Inventor: MUKAI HIDEHITO
IPC: H01B12/04
Filed: 1992-03-18
Granted: 1997-04-22
Abstract: In order to prevent inflation of a metallic coating during heat treatment so that no ununiformity is caused in the critical current density in a method of preparing an oxide superconducting wire which is obtained by heat treating and sintering metal-coated raw material powder for an oxide superconductor, raw material powder (5) for an oxide superconductor is filled up in a metal billet (1), which in turn is degassed and sealed in the degassed state, elongated with application of hydrostatic extrusion, and then heat treated.
Patent CA-2066162-C (CA)
Title: Oil treatment method
Inventor: NOONAN WILLIAM RICHARD
IPC: A62D3/00
Filed: 1990-09-26
Granted: 2001-09-04
Abstract: What is disclosed is a method of encapsulating hydrocarbon systems with the combination of an emulsifier solution and a reactive silicate solution. The method comprises the addition of an emulsifier solution to a hydrocarbon, for example, crude oil, then adding the reactive silicate solution to the emulsifier solution and hydrocarbon mix. Upon adding the reactive silicate solu-tion the mix changes to a thick gel consisting of agglomerates of microspheres having typical diameters of 2 to 4 micrometres and less, The agglomerates are only loosely bound and the microspheres are easily dispersable into individual entities. Upon drying the wet gel yields a free-stowing powder. The encapsulation does not chemically alter or degrade the oil in any way,
Patent CA-2075524-C (CA)
Title: Method of operation of remote data/control apparatus with controlled response timing
Inventor: GAREH ODED
IPC: H04L12/403
Filed: 1992-08-07
Granted: 2004-10-05
Abstract: This invention relates to communications apparatus, such as remote data/control apparatus. A first unit (10) and a second unit (11) are arranged to exchange messages over a communication channel. To avoid collision between responses between different remote units, the first unit has means for requesting a response from the second unit and means for communicating to the second unit a value (23) representing a time delay and the second unit has means for monitoring the channel, determining when the channel becomes free and transmitting its response to the first unit delayed by that time delay after the channel becomes free.
Patent CA-2088840-C (CA)
Title: 4-benzoyl isoxazole herbicides
Inventor: CAIN PAUL A
IPC: A01N43/80
Filed: 1993-02-04
Granted: 2003-12-30
Abstract: 4-Benzoyl isoxazole derivatives of general formula (I):   (See formula I) wherein R represents a hydrogen atom or a group -CO2R5;      R1 represents methyl, isopropyl, cyclopropyl or 1-methylcyclopropyl;      R2 represents -S(O)n R51;      R3 represents a chlorine, bromine or fluorine atom, a straight- or branched- chain alkyl, alkoxy, haloalkyl or haloalkoxy group, an alkenyl group or a methyl or ethyl ester group;      R4 represents a chlorine, bromine or fluorine atom; an alkyl, alkoxy haloalkyl, haloalkoxy, -S(O)p R53 or cyano group;     R5 represents an alkyl or haloalkyl group;      R51 and R53 independently represent an alkyl group, and n and p independently represent, zero, one or two, and their use as herbicides is described.
Patent CA-2089783-C (CA)
Title: Scroll type compressor with variable displacement mechanism
Inventor: YOKOYAMA HIROYUKI
IPC: F04C28/16
Filed: 1993-02-18
Granted: 1999-02-16
Abstract: A variable displacement, scroll-type compressor comprising a housing having fluid inlet and outlet ports. A fixed scroll member, placed within the housing, comprises a first plate from which a first spiral element extends. An orbiting scroll membercomprises a second plate from which a second spiral element extends. A pair of holes are formed through said first plate. A pair of bypass passages place intermediately located sealed-off fluid pockets in communication with a suction chamber. A pair of cylinders are formed within respective bypass passages. A valve member having a first and a second axial end is slidably disposed within each of the cylinders so as to close and open the corresponding bypass passage. A spring is disposed within the cylinder so as to urge the valve member to open the bypass passage. The valve member receives pressure at its first axial end from the intermediately located sealed-off fluid pocket. A three-way electromagnetic valve selectively controls communication between thesecond axial end of the valve member and either the suction chamber or the discharge chamber.
Patent CA-2092590-C (CA)
Title: Call message recording for telephone systems
Inventor: DOHERTY GERARD PATRICK
IPC: H04M15/00
Filed: 1993-03-26
Granted: 1996-07-09
Abstract: The EMI message record generated for interexchange telephone toll calls is enhanced via the addition of a primary interexchange carrier (PIC) indicator, whose value provides an indication as to whether a terminating subscriber has a particular interexchange carrier as his/her PIC. The PIC indicator may be used by the interexchange carrier when bills are rendered for its subscribers--for example, to provide different billing treatment for calls that were made over that carrier'snetwork to terminating subscribers whose PIC is, in fact, that very carrier, as opposed to calls that were made to subscribers with a different PIC.
Patent CA-2096432-C (CA)
Title: Maximum search circuit
Inventor: DENT PAUL W
IPC: G06F7/22
Filed: 1992-09-18
Granted: 2002-07-16
Abstract: An electronic comparator for selecting and outputting the larger of first and second electrical, binary-coded input values presented bit-serially, most-significant-bit first, has first and second input terminals; a logical exclusive-OR gate; a first resettable flip-flop; a second flip-flop; and a device for selecting of the input values as an output of the comparator. In second embodiment, the electronic comparator has first and second input terminals; a logical exclusive-OR gate; a first flip-flop synchronized with a train of bitclock pulses; a second resettable flip-flop; a third flip-flop and a device for selecting one of the input values as an output of the comparator. Devices for generating traceback signals indicating which input values were selected and a signal indicating that the maximum value has been identified are also disclosed.
Patent CA-2102081-C (CA)
Title: Data recovery technique for asynchronous cdma systems
Inventor: BI QI
IPC: H04B1/7105
Filed: 1993-10-29
Granted: 1998-02-03
Abstract: To recover the bits from various users in an asynchronous CDMA communications system, samples of the received signal are processed using blocksof code coefficients. Each code coefficient block includes the sequence of code coefficients for each user which formed the received signal samples. Each sequence has the same number of code coefficients and this number is equal to the product of a predetermined number of bit intervals and the number of code coefficients per bit interval. Processing of the received signal samples using this block formation completely eliminates interference including the so-called leading and lagging edge effects and can be implemented with blocks that include the code coefficients in one or more bit intervals.
Patent CA-2103512-C (CA)
Title: Conducting plastics material and a method for its preparation
Inventor: SAVOLAINEN ESKO
IPC: C08K3/20
Filed: 1993-08-06
Granted: 2005-03-29
Abstract: When using as a plastics material a polyaniline which has been doped with a protonic acid, the difficulty is how to combine the melt-processability and neutrality of the material. A well processable, with a protonic acid doped polyaniline has heretofore always been so acidic that it has disturbed both the processing apparatus, and the environment as a finished product. It has now, anyhow, been invented a process for the preparation of a plastics material which is based on a doped polyaniline, wherein during or after bringing in contact a polyaniline or a derivative thereof and a protonic acid also a metal compound is admixed. The metal compound is preferably first reacted with a first acid, whereupon the obtained product is brought together with a blend or reaction product formed by a polyaniline or a derivative thereof and a second protonic acid. In the mentioned process as the metal compound e.g. zinc oxide is used, as the first acid preferably the same acid as for the second protonic acid, i.e. dodecylbenzenesulphonic acid, is used. The plastics mixture thus prepared is preferably brought together with a thermoplastic polymer such as a polyolefin, wherein a neutral, plastic, stabile plastics material having a low percolation threshold is obtained.
Patent CA-2112936-C (CA)
Inventor: OXMAN JOEL D
IPC: A61K6/847
Filed: 1994-01-06
Granted: 2003-03-18
Abstract: This invention provides an adhesion promoter composition, comprising: a primer composition comprising an oxidant having an oxidation potential greater than the absolute value of the E° reductant of the adherend and optionally a solvent; and an adhesive composition.      This invention also provides a method of adhering a restorative material to an amalgam substrate, comprising the steps of: applying a primer composition and an adhesive to an amalgam substrate; hardening the adhesive; and optionally overcoating the adhesive with a restorative material.      These methods and materials have utility for applications that require adhesion to existing dental amalgams including, for example, the esthetic veneering of an amalgam restorative with a composite restorative material, and the repair or modification of old amalgam restorations with a fresh amalgam or with a composite restorative material.
Patent CA-2117012-C (CA)
Title: Harrow drawbar assembly
Inventor: DEGELMAN WILFRED JOHN
IPC: A01B73/04
Filed: 1994-03-04
Granted: 1998-12-15
Abstract: A harrow drawbar assembly is described which includes a harrow frame with depending tines and at least one spring strap.  The at least one spring strap has a first end and a second end.  The second end of the at least one spring strap is  secured to the harrow frame.   Means  is provided for attaching the first end of the at least one spring strap to a drawbar.  The at least one spring strap extends substantially horizontally from the drawbar and serves as means by which the harrow frame is pulled by the drawbar.   The at least one spring strap exerts a downward pressure upon the harrow frame to maintain the tines of the harrow frame in contact with a groundsurface. This harrow drawbar assembly is intended to restrict vertical movement and generally improve the ability of the harrow to follow groundsurface contours.
Patent CA-2118210-C (CA)
Title: Adaptive resonator vibration control system
Inventor: LANGLEY ANDREW J
IPC: G10K11/178
Filed: 1992-04-15
Granted: 1998-08-04
Abstract: This invention relates to control systems for the control of noise and vibration . Resonators (3) with adjustable properties are used in conjunction with an electronic control system (7) to change the nois e or vibration in a structure (1). The invention relates particularly to the control of quasi-periodic noise or vibration compris ing one or more harmonics by using one or more adaptive resonators (3).
Patent CA-2119052-C (CA)
Inventor: STAMPA DIEZ DEL CORRAL ALBERTO
IPC: C07C213/04
Filed: 1994-03-15
Granted: 2005-08-30
Abstract: The invention relates to a new, industrially advantageous, process for the preparation of the known beta-adrenergic blocking agent levobunolol, not requiring resolution of racemic bunolol, based on the enantioselective synthesis of an oxiranic intermediate which is then reacted with tert-butylamine.      The process of this invention consists of reacting 5-hydroxy-3,4-dihydro-1(2H)-naphthalenone with (R)-(-)epichlor-hydrine in an aprotic solvent in the presence of a strong base at a temperature of over 90°C, thus obtaining the intermediate chiral oxirane (S)-5-(2,3-epoxypropoxy)-3,4-dihydro-1-(2H) --naphthalenone with more than 95% optical purity, and then, the intermediate chiral oxirane is reacted with tert-butylamine.
Patent CA-2121397-C (CA)
Inventor: OSSIAN KENNETH C
IPC: C09K3/22
Filed: 1994-04-15
Granted: 1998-09-22
Abstract: A floor sweeping composition including a floor sweeping carrier and a liquid hygroscopic alkali or alkaline earth salt solution, preferably selected from the group of magnesium chloride and calcium chloride. The liquid enhances the effectiveness of the sweeping composition and its ability to collect and remove fine dust materials.
Patent CA-2122249-C (CA)
Inventor: DOLMOVICH BRUCE E
IPC: H01L29/74
Filed: 1993-09-09
Granted: 1998-06-09
Abstract: A capacitive discharge ignition system is described that incorporates a two-terminal passive network for controlling the discharge of a capacitive energy storage device into an igniter plug, wherein the network comprises a solid-state switch for alternately providing high and low ohmic paths between the two terminals in order to selectively connect the capacitive energy storage device to the igniter plug.  The passive network includes means  responsive to a predetermined value of a voltage differential between the two terminals for effecting the switching of the path between the two terminals provided by the solid-state switch from a high ohmic value to a low ohmic value, thereby controllably discharging the capacitive energy storage device into the igniter plug. In the illustrated embodiment, the solid-state switch is a series of SCRs, each of whose anode is connected to the trigger input of the SCR by way of a breakover diode.