baber/WOPTO huggingface dataset:
Patent CA-2030596-C (CA)
Title: Process of removing and concentrating desired molecules from solutions
Inventor: BRADSHAW JERALD S
IPC: B01J39/26
Filed: 1990-11-23
Granted: 2003-08-12
Abstract: A method is disclosed for the quantitative removal and concentration of desired molecules or ions, such as gases, anions and amino acids, from a source solution which may contain larger concentrations of other molecules. The method comprises bringing the source solution into contact with a solid cation-ligand-matrix consisting of a cation complexed to a ligand molecule covalently bonded to a matrix consisting of an organic spacer bonded to a solid inorganic support through a silicon atom. The cation has an affinity for the desired molecules to form a complex between the desired molecules and the cation portion of the solid cation-ligand-matrix at binding sites initially held by H2O or other weakly coordinated ligands or via ion pairing. The desired molecule complex is broken releasing either the desired molecules or desired molecules complexed with the cation by contacting the solid cation-ligand-matrix-desired molecule complex with a much smaller volume of a receiving solution in which said desired molecules are soluble. The concentrated ions or molecules thus removed may be analyzed and/or recovered by known methods. The process is useful in measuring the concentrations of molecules originally present at parts per billion levels; in the removal of low levels of toxic molecules such as ammonia or anions such as chromate from potable and saline water; in the preparation of ultrapure salts and gases; and in the recovery of valuable molecules present in low concentrations as in the separation of amino acids, etc.
Patent CA-2031578-C (CA)
Title: Process for the preparation of molluscicidal 2,4,5-tribromopyrrole-3-carbonitrile compounds
Inventor: KAMESWARAN VENKATARAMAN
IPC: A01N43/36
Filed: 1990-12-05
Granted: 2002-01-08
Abstract: There is provided a method of preparation of 2,4,5-tribromopyrrols-3-carbonitrile compounds in a single step from their 2-trihaloacetylpyrrole-4-carbo-nitrile precursors. The 2,4,5-tribromopyrrole-3-carbo-nitrile compounds are useful as molluscicidal agents.
Patent CA-2032720-C (CA)
Title: Adhesive compositions containing aqueous copolymer dispersions and acid metal salts or free acids
Inventor: HAERZSCHEL REINHARD
IPC: C08F261/04
Filed: 1990-12-19
Granted: 1997-03-18
Abstract: The invention relates to adhesive compositions for gluing wood containing aqueous vinyl ester graft copolymer dispersions and water-soluble acid metal salts or free acids, in which the adhesive compositions exhibit outstanding resis-tance to hot water and have high storage stability.  The vinyl ester graft copolymer comprises from 2 to 12 percent by weight, based on the total weight of the graft copolymer, of one or more polyvinyl alcohols having a degree of hydrolysis of from 60 to 99 mol persent and 88 to 98 percent by weight, based on the total weight of the graft copolymer, of a graft-ing monomer mixture.  The grafting monomer mixture contains from 5 to 50 percent by weight, based on the total weight of the monomer mixture, of vinyl esters of saturated, highly branched aliphatic monocarboxylic acids having 9 or 10 carbon atoms, vinyl pivalate, diisopropyl maleate, diisopropyl fumar-ate, vinyl chloride and mixtures thereof.
Patent CA-2038293-C (CA)
Title: Cylinder with radially movable rod
Inventor: FAITEL WILLIAM M
IPC: B30B15/00
Filed: 1991-03-14
Granted: 2000-11-21
Abstract: A cylinder having a radially movable or pivoting rod slidably received in a floating gland disposed in a cavity or recess in an end cap of the cylinder. Preferably, seals are provided between the rod, gland and recess.      Hence, the rod and gland can move radially while a fluid tight seal is maintained between the atmosphere and the interior of the cylinder to retain pressurized fluid therein.      Preferably, to facilitate radial movement of the rod and hence the gland in the recess, the forces on opposed faces of the gland are equalized by an appropriate arrangement of seals to define equal surface areas on the opposed faces both of which communicate with the interior of the cylinder.
Patent CA-2040520-C (CA)
Title: Process for hydrating soft contact lenses
Inventor: KINDT-LARSEN TURE
IPC: C08J7/02
Filed: 1991-04-15
Granted: 1998-06-16
Abstract: A process for releasing leachable substances from a polymeric contact lens blank.  The contact lens is confined in a cavity within a carrier to permit the hydration of the lens without permitting it to invert or roll over.  A fluid flow is introduced into the cavity about the lens to extract leachable material from the lens.  The process significantly reduces the amount of leaching fluid that is used and the amount of time that is needed for hydration, washing and extraction.
Patent CA-2044009-C (CA)
Title: Push switch with improved actuator assembly
Inventor: IWASA SEIICHI
IPC: H01H13/14
Filed: 1991-06-07
Granted: 1995-05-09
Abstract: A push switch of the invention comprises a support, a switching-element assembly arranged on the support, and an actuator assembly arranged on the switching-element assembly, wherein the switching-element assembly comprises a first and a second contacts vertically arranged, the second contact being elastically movable toward the first contact and making contact with the first contact when depressed by the actuator assembly.          The basic type of the actuator assembly comprises an airtight enclosure of an elastic film having a domed shape and a gas enclosed therein, whereby the bottom surface of the airtight enclosure depresses said second contact by a depression force onto the top surface thereof.  Several modified types of the actuator assembly are also disclosed.
Patent CA-2046702-C (CA)
Title: Molded suture retainer
Inventor: BROWN DAVID L
IPC: A61B17/06
Filed: 1991-07-10
Granted: 2001-11-20
Abstract: A molded suture retainer is provided for retaining and storing long suture lengths. Both absorbable and nonabsorbable sutures fabricated from natural or synthetic materials can be advantageously retained and stored therein.     The retainer is characterized by a wide spiraling oval passageway with minimal convolutions covered by a cover sheet. The length of the passageway is preferably proportional to 1/3 to 1/2 the overall length of the suture to be retained therein. In accordance with the method of the invention, sutures are doubled or tripled over and inserted into the retainer under vacuum. Sutures packaged in accordance with the invention exhibit fewer kinks and bends than prior packaged sutures.
Patent CA-2047631-C (CA)
Title: Push-button lock arrangement
Inventor: FISH AARON M
IPC: E05B37/16
Filed: 1991-07-23
Granted: 1999-10-12
Abstract: The push-button lock arrangement includes a permutation chamber, and, in accordance with the invention, the combination of the permutation chamber can be changed without dismantling the lock arrangement and without the use of special tools. A cam, which is rotated by a simple screwdriver, activates the end of the lock-out slide of the permutation chamber to put the permutation chamber in its reset mode. The lock arrangement also includes a rotating stop member and a stationary stopper. The rotating stop member is connected to the outside door knob so that the rotation of the outside door knob is constrained to a predetermined angle of rotation.
Patent CA-2051290-C (CA)
Title: Quasi-phase matching optical waveguide
Inventor: SCHILDKRAUT JAY STUART
IPC: G02B6/00
Filed: 1991-09-13
Granted: 1995-11-28
Abstract: A quasi-phase matching optical waveguide for producing a second harmonic of an internally propagated polarized laser beam having a wavelength in the range of from 700 to 1300 nm disclosed.  The waveguide is comprised of at least one array of laterally spaced transparent electrodes in direct contact with a transmission medium containing similarly polar aligned organic molecular dipoles in overlying areas.  The transparent electrodes and overlying areas of the transmission medium are each of the same width and spacing.
Patent CA-2053254-C (CA)
Title: Single-use disposable molten metal inclusion sensor
Inventor: GUTHRIE RODERICK I L
IPC: G01N33/20
Filed: 1990-04-27
Granted: 2001-03-20
Abstract: A molten metal inclusion sensor (40) comprises a single use disposable probe (41) which is detachably connected to a support member (42). The probe (41) may comprise a tube (44) of heat resistant material having an inner electrode (48) mounted on its interior wall and an outer electrode (50) mounted on its exterior wall, the molten metal entering the tube interior through an orifice (45) in its wall past a jet-preventer insert (49) upon its immersion in the molten metal, whereupon the flow of metal with entrained inclusions is monitored by measuring the voltage between the electrodes (48, 50). Alternatively the tube (44) may be of electrically-conductive heat-resistant material and constitute the inner electrode (48). The flow may be assisted by a reduced pressure established within the tube, or may be slowed by a positive pressure to maintain the Reynolds number of the flow below 2000. The tube interior is divided by a narrow bore (52) into two compartments (40a, 40b) so that metal enters one compartment (40a) and freezes in the bore (52) so that it cannot enter the second compartment (40b), protecting the vacumm source if provided and establishing the quantity of metal entering the probe. The orifice (45) is closed by a meltable cover (46) and the cover is protected by a meltable shield (47) to enable the probe to be passed through an overlying slag layer without entry of slag to the probe interior. Various suitable materials are disclosed for the electrodes and for the body of the probe which should have a useful life in the bath of about 2 minutes.
Patent CA-2054543-C (CA)
Title: Dc-dc converter of charge pump type
Inventor: ITO HIDENOBU
IPC: H02M3/07
Filed: 1991-10-30
Granted: 1997-09-30
Abstract: A DC-DC converter includes first and second capacitors coupled in parallel, a switching part for controlling the first and second capacitors so that the first capacitor is charged by an input voltage and the second capacitor is charged by a discharging of the first capacitor, an output voltage being obtained at one end of the second capacitor, and the switching part including a discharge path through which the second capacitor is discharged.  An output voltage detection units detects the output voltage and determines whether or not the output voltage satisfies a predetermined condition.  A discharge path breaking units breaks the discharge path when the output voltage detection unit determines that the output voltage satisfies the predetermined condition, so that the first capacitor is prevented from being discharged through the discharge path.
Patent CA-2058453-C (CA)
Title: Chymosin recovery and purification
Inventor: HEINSOHN HENRY G
IPC: C12N9/00
Filed: 1990-06-13
Granted: 1999-06-01
Abstract: 2058453 9015865 PCTABS00003 This invention provides a method of recovering and purifying chymosin from fermentation used for microbial production of chymosin.  The fermentation mixture is filtered to provide a filtrate containing the chymosin. The filtrate is first prepared by either adjusting it to a low pH, such as about 2 and/or adjusting the salt concentration of the filtrate to at least about 2M. The aqueous filtrate mixture is contacted with a phenyl-sepharose resin, which selectively binds the chymosin from the filtrate. The filtrate remaining after the contact with the phenyl-sepharose resin is discarded, and the phenyl-sepharose resin column is eluted with water or dilute salt solution to obtain substantially pure chymosin in a single elution step.
Patent CA-2060673-C (CA)
Title: Stray current neutralizing method and device
Inventor: MONTREUIL MICHEL
IPC: H02H3/14
Filed: 1992-02-05
Granted: 1998-11-24
Abstract: A method and device neutralize alternating stray current flowing through a ground return circuit in the proximity of  an animal susceptible to be affected by this  current.   The alternating stray current flowing through the ground return circuit is sensed and a  signal  representative of that  stray current is produced.   In response to this current representative  signal,  an alternating compensatory current is generated and injected in the ground return circuit.  The alternating compensatory current has an amplitude equal to the amplitude of the sensed stray current and is out of phase with respect to that stray current  by  an  angle  of  180°.    Therefore,  the alternating compensatory current and the alternating stray current add in the ground return circuit and substantially cancel  each other whereby the stray current can no longer affect the animal.  A plurality of different configurations for the connection of the stray current neutralizing device to the ground return circuit  are  described,  each  configuration  being adapted to a specific application.
Patent CA-2063112-C (CA)
Title: Windings for electromagnetic machines
Inventor: GAVRILIDIS GEORGE
IPC: H01F5/00
Filed: 1992-03-16
Granted: 1997-03-04
Abstract: Coils, for installation in slots in laminated cores of electromagnetic machines, particularly linear induction motors, are insulated by wrapping successively with heat resistant  tape,  tape  of  a  curable  silicone  rubber composition which may  be  glass  fibre  reinforced,  and further heat resistant tape, and curing the rubber whilst pressing to size those portions of the coil to be inserted in the slots.  The heat resistant tapes form a mould within which the rubber is cured to form an insulating jacket. The inner layer of tape includes a lubricant layer of PTFE tape.  Connections between adjacent coils may be similarly insulated  when  the  coils  are  assembled  prior  to installation in a core.
Patent CA-2065967-C (CA)
Title: Vinyl chloride resin composition
Inventor: TAKAKI AKIRA
IPC: C08L27/06
Filed: 1992-04-14
Granted: 2002-07-30
Abstract: A vinyl chloride resin composition having an improved impact resistance with a good transparency that the vinyl chloride resin itself possesses originally; which comprises (A) a graft copolymer prepared by (i) adding a water-soluble electrolyte to a butadiene polymer (a) (ii) adding a monomer mixture (b) containing mainly an aromatic vinyl monomer to polymerize, (iii) adding a monomer mixture (c) containing mainly an alkyl methacrylate to polymerize and (iv), when desired, adding a monomer mixture (d) containing mainly an aromatic vinyl monomer.
Patent CA-2075541-C (CA)
Title: Method of and system for flour milling
Inventor: SATAKE SATORU
IPC: B02B1/04
Filed: 1992-08-07
Granted: 1997-10-21
Abstract: A flour milling method and system therefor comprising the steps of separating foreign materials from raw wheat, humidifying the raw wheat, polishing the raw wheat, and conditioning the polished wheat, further comprises a step of cleaning the polished wheat at a subsequent step of the polishing the raw wheat.  The flour milling method and system therefor may further comprises a step of stirring the cleaned polished wheat at a subsequent step of the cleaning step of the polished wheat.  The bran powder which has been entered into the creases of the polished wheat at the polishing step, absorbs cleaning water and then flows out from the creases with the cleaning water.  Since the bran powders in the creases of the polished wheat can be removed effectively, the milling efficiency is improved.
Patent CA-2079187-C (CA)
Inventor: ZAMBIAS ROBERT A
IPC: A61P31/04
Filed: 1992-09-25
Granted: 2000-09-19
Abstract: Certain bisamine compounds which have a cyclohexapeptidyl nucleus and which are found to have antibiotic activity with physical properties suitable for direct use in therapeutic compositions are described. A novel process for their preparation is also described.
Patent CA-2082090-C (CA)
Title: Improved occluder for repair of cardiac and vascular defects
Inventor: FAGAN JACK
IPC: A61B17/03
Filed: 1992-11-04
Granted: 2004-04-27
Abstract: A device for the percutaneous transluminal repair of septal defects is disclosed. The device comprises first and second expandable occluders fastened to each other, each occluder including a framework having a central hub with elongated struts radiating therefrom. The struts are constructed such that they have a resistance to fatigue that exceeds the maximum fatigue stresses to which the struts will be subjected over a prolonged period in vivo. As such, the device exhibits a significantly decreased likelihood of metal fatigue failures after prolonged exposure in vivo.
Patent CA-2082313-C (CA)
Title: Leak detection
Inventor: SPRING G EVERETT
IPC: G01M3/32
Filed: 1992-11-06
Granted: 1996-02-06
Abstract: Methods of and apparatus for detecting the leakage of fluids from containment vessels. The tank is surrounded by or lined with a generally fluidtight envelope, and a vacuum is applied to hold the envelope against the tank and thereby control and limit to a very small volume the space between the primary containment, be it the vessel or liner, and the envelope. Fluids escaping form the containment vessel collect in that space. Collected fluids are evacuated; and fluid withdrawal information is processed, providing an advisory if a leak occurs or continues and/or information on the magnitude of the leak. An indication of a possible leak can also be obtained by monitoring the pressure in the space between the containment vessel and the encapsulating envelope. A trend-bucking change in that pressure is also an indication of a possible leak. Other installations make use of a second system to detect and evaluate leaks into the installation from the surrounding environs.
Patent CA-2082933-C (CA)
Title: Method and means to perform biochemical reactions
Inventor: MALMQUIST MATS
IPC: C12Q1/68
Filed: 1991-05-15
Granted: 2002-09-17
Abstract: The present invention relates to a method to perform biochemical reactions and a combination of a capillary (3) and a reaction vessel (1) for use in said method. The reagent capillaries (3) contain frozen reagents (6-13) separated from each other by air or an inert fluid. At use, the reagent capillaries (3) are placed in a reaction vessel (1) to be thawed and then the contents are centrifugated to the bottom of the reaction vessel (1). The invention is intended for use in all types of biochemical standard reac-tions and diagnostic tests in which the reagents, cannot be mixed in advandce.  It is particularly suitable for CPR diagnostics but is also especially beneficial when handling radiactive reagents, e.g. labeled nucleotides, at sequencing reactions, etc.
Patent CA-2088357-C (CA)
Title: Image reading system
Inventor: LEE KOK-MENG
IPC: H04N5/345
Filed: 1991-11-18
Granted: 1998-05-19
Abstract: An image reading system observes a field of view and forms electrical signals indicating the presence of objects within the field as to location and movement. After ascertaining the area of the field in which an object (16) is located, the system is speeded up by reading signals outside the area at a high rate of speed and those inside the area at a normal rate of speed.
Patent CA-2099537-C (CA)
Title: Herbicide intermediate o-nitrophenyl cyclopropyl ketone and a method for the preparation thereof
Inventor: BURELLO MARCO P
IPC: B01J23/42
Filed: 1993-07-02
Granted: 2003-09-23
Abstract: There is provided ~-nitrophenyl cyclopropyl ketone, a key intermediate in the manufacture of the crop-selective, herbicidal agent 1-([~-(cyclopropyl-carbonyl)phenyl]sulfamoyl}-3-(4,6-dimethoxy-2-pyri-midinyl)urea and a method for the preparation of said ketone from dihydro-3-acetyl-2(3H)-furanone and ~-nitrobenzoyl halide.
Patent CA-2100918-C (CA)
Title: Oxime derivative
Inventor: HAMANAKA NOBUYUKI
IPC: C07C239/20
Filed: 1993-07-20
Granted: 1997-01-21
Abstract: An oxime derivative (1):       (I) wherein R' is hydrogen or lower alkyl; R2 is hydrogen, alkyl, phenyl, cycloalkyl, a monocyclic ring containing nitrogen, lower alkyl substituted by a benzene ring or cycloalkyl, or a lower alkyl substituted by a monocyclic ring containing nitrogen; R3 is alkyl, phenyl, cycloalkyl, a monocyclic ring containing nitrogen, a lower alkyl substituted by a benzene ring or cycloalkyl, or lower alkyl substituted by a monocyclic ring containing nitrogen, wherein the ring in R2 and R3 may be substituted by lower alkyl, alkoxy, halogen, nitro, or trihalomethyl; and salts thereof. These compounds possess PGI2 receptor agonist activity, and are expected to be useful for prevention and/or treatment of thrombosis, arteriosclerosis, ischemic heart diseases, gastric ulcer and hypertension.
Patent CA-2106042-C (CA)
Title: Roadside barrier
Inventor: KRAGE WILLIAM G
IPC: E01F15/00
Filed: 1993-09-13
Granted: 1997-01-07
Abstract: An energy absorbing roadside barrier includes an elongated container configured to receive and hold a volume of water.  The container defines a pair of sidewalls having sufficient rigidity to stand alongside a roadway and sufficient resilience to deform upon an impact by a vehicle and to recover their shape after at least some impacts.  The barrier also includes an internal frame positioned within the container.  The frame includes first and second axial braces positioned adjacent respective sidewalls of the container, and the axial braces are secured together by at least one cross brace.  The frame and container are formed of different materials, and the frame increases the rigidity of the barrier and strengthens the barrier against bending.
Patent CA-2109274-C (CA)
Title: Arrangement for automating call-center agent-schedule-notification and schedule-adherence functions
Inventor: KEPLEY GARRY DUANE
IPC: H04M3/523
Filed: 1993-10-26
Granted: 1997-02-04
Abstract: A call-management system (14) for a call center (FIG. 1) having a plurality of terminals (12) staffed by agents (13) includes a program-implemented arrangement (24) for communicating each agent's schedule to the agent via the agent's corresponding terminal and for monitoring the agent's adherence to the communicated schedule via the agent's corresponding terminal, thereby relieving a supervisor (19) of having to perform these functions. Other programs (25-27) that enable the supervisor to automatically communicate with the agents via their terminals are also included in the call-management system.
Patent CA-2111257-C (CA)
Inventor: MAUTINO PETER SCOTT
IPC: B61G9/24
Filed: 1993-12-13
Granted: 1999-05-04
Abstract: A drawbar bearing block for a slackless drawbar system which connects adjacent ends of a pair of railway cars in a semi-permanent manner.  Such bearing block  includes  a  top  portion supported and retained in a hemispherical recess which extends partially around a pin opening formed in a pin receiving opening disposed in a butt end of a drawbar. Such top portion of the bearing block has an outer surface which closely matches a surface of  such  hemispherical  recess  and  an  inner  surface  having  a cylindrical shape to receive a pin therein. There is at least one recessed opening formed in the top portion adjacent a bottom surface and an outer surface thereof. A bottom portion is supported and retained  in  such  hemispherical  recess  and    assists  in supporting and retaining such top portion in the hemispherical recess. Such bottom portion of the bearing block includes an outer surface which closely matches the surface of such hemispherical recess and an inner surface having a cylindrical shape to receive a pin therein. Such inner surface being in alignment with such inner surface of such top portion. There is at least one tab-like member extending upwardly from an upper surface of such bottom portion and adjacent said outer surface thereof. Such tab-like member matingly engages with the recess in said top portion. Such tab-like member has an outer surface which closely  matches the surface of such hemispherical surface.