baber/WOPTO huggingface dataset:
Patent CA-2032246-A1 (CA)
Title: Low-temperature-stable petroleum middle distillates, containing polymers as paraffin dispersants
Inventor: OPPENLAENDER KNUT
IPC: C10L1/14
Filed: 1990-12-14
Abstract: ABSTRACT:       Low-temperature-stable petroleum middle distillates, containing small quantities of polymers or copolymers, which contain or comprise substantial proportions of units having the general structural formula I     in which R1 and R2 represent, independently of one another, hydrogen or low-molecular alkyl, or together represent a tetramethylene radical, and in which R3 and R4 represent unbranched alkyl radicals having from 14 to 24 carbon atoms.      The additives effect very good dispersion and flow improvement.
Patent CA-2033614-A1 (CA)
Title: Apparatus for removing preservatives from solutions
Inventor: HEYL BARBARA L
IPC: A61J1/14
Filed: 1991-01-04
Abstract: Apparatus for removing preservatives from solutions Abstract of the Disclosure There is presented a device for removing a preservative from ophthalmic and other solutions as the solution is dispensed from a container. The device preferably comprises a container having squeezable sidewalls defining a solution retaining chamber, but may also be an aerosol can or other container.     The container also preferably includes a neck portion and a dispensing head having a container outlet on its end through which the solution is dispensed. Means for removing the preservative from the solution as the solution is dispensed from the chamber through the container outlet are also provided. This removing means preferably comprise scavenging material. The preservative is removed upon, contact with the scavenging material.
Patent CA-2034176-A1 (CA)
Inventor: RIBIC ZLATAN
IPC: H04R25/00
Filed: 1991-01-15
Abstract: A single-channel circuit for  a hearing  aid for persons  with  an  impaired  hearing  faculty,  said  circuit having a pre-amplifier and a final amplifier,  a microphone and an earphone as well as a rectifier circuit for producing a  control  voltage  for  a  voltage-dependent  attenuator connected behind said pre-amplifier.   In order to allow, concerning   the   audibility   of   speech,   a   favourable characteristic over the whole  amplification  range,  it  is provided that a voltage-controlled filter  (4)  is provided for a signal-dependent change in the frequency response with the control  input of said filter being connected to the rectifier circuit (7), whereby said filter (4) is connected to said rectifier circuit via a time function element (t2), said rectifier circuit preferably being arranged as a full-wave rectifier circuit.
Patent CA-2034622-A1 (CA)
Title: Trimerization catalysts, a process for their preparation and their use for the preparation of polyisocyanates containing isocyanurate groups
Inventor: SCHOLL HANS-JOACHIM
IPC: B01J21/08
Filed: 1991-01-21
Abstract: TRIMERIZATION CATALYSTS, A PROCESS FOR THEIR PREPARATION AND THEIR USE FOR THE PREPARATION OF  POLYISOCYANATES CONTAINING ISOCYANURATE GROUPS              ABSTRACT OF THE DISCLOSURE    The present invention relates to trimerization catalysts which are suitable for heterogeneous catalysis and are based on quaternary ammonium or phosphonium fluorides adsorbed on porous carrier materials, characterized in that the carrier material is an adsorbent having a particle size (90%) of 0.1 to 10 mm, a pore volume of 0.4 to 1.4 ml/g, an average pore diameter of 7 to 50 nm and a specific surface area (BET) of 100 to 700 m2/g.    The present invention also relates to a process for the preparation of these catalysts by stirring together an alkali metal fluoride and a quaternary ammonium or phosphonium salt in the presence of an alcoholic solvent, removing any precipitate formed by filtration and adsorbing the resulting homogeneous catalyst solution onto the previously described carrier material, optionally after further dilution of the solution with an alkaline solvent.      Finally, the present invention relates to the use of the catalysts for the preparation of polyisocyanates containing isocyanurate groups by trimerizing at least a portion of the isocyanate groups of organic diisocyanates.
Patent CA-2034762-A1 (CA)
Title: Process for preparation of condensed alcohols by alkoxide catalysis
Inventor: YOUNG DAVID A
IPC: B01J31/02
Filed: 1991-01-22
Abstract: ABSTRACT OF THE DISCLOSURE          Condensed dimer alcohols,  also known as Guerbet alcohols, are prepared using metal alkoxide as the catalyst by reacting alcohol with saturated or unsaturated aldehyde or allyl alcohol,  or mixtures thereof, at 100°C-220°C and removing water as it is formed during the reaction.  Dimer alcohols are prepared in high yields without the need for a transition metal catalyst.
Patent CA-2035021-A1 (CA)
Title: Method for aseptically rooting of in-vitro propagated material for the horti- and agriculture
Inventor: VAN OEVEREN JACOBUS J
IPC: A01H4/00
Filed: 1990-06-21
Abstract: (57) Abstract A method for aseptically rooting of in-vitro propagated material for the horti- and agriculture, using a rooting medium, within a c???ed integument formed of a semi-permeable and transluscent membrane. According to the invention the plant to be rooted is put into a spongy artificial substrate which is impregnated or soaked with the rooting medium in liquid form and is en-closed within the integument.
Patent CA-2036692-A1 (CA)
Title: Coaxial resonator with distributed tuning capacity
Inventor: GLENAT HENRI
IPC: G01R33/24
Filed: 1991-02-20
Abstract: This resonator includes one external conductor (20) and one central conductor (10), both conductors having a symmetry of revolution around a given axis (A). The tuning capacitor is fully distributed along the axis of the resonator and includes at least two cylindrical armatures (80, 82, 84) nested into each other and having as an axis the axis (A) of the resonator, one of the two armatures (82) constituting one of the two conductors of the resonator.
Patent CA-2037391-A1 (CA)
Title: Agents affording sliding characteristics
Inventor: TRAVERSO ENRICO
IPC: C07C19/08
Filed: 1991-03-01
Abstract: Compounds which can be defined by the formula (I):        CF3~C n F2n-C m H2m-CH3           (I) wherein:   - n is a numeral comprised within the range of from 1 to 21;   - m is a numeral comprised within the range of from 3 to 25;   - n + m is a numeral equal to, or higher than, 18;   - with the chain of carbon atoms being either linear or branched are used as agents affording sliding characteristics (ski-waxes) for skis, to be applied onto the ski sole, and/or to be incorporated inside the ski sole.        A sliding composition is also disclosed, which contains a paraffinic wax and at least one compound with formula (I).
Patent CA-2041137-A1 (CA)
Inventor: BALDWIN JOE M
IPC: F24F3/044
Filed: 1991-04-24
Abstract: A method of configuring a controller of an HVAC system comprising the step of configuring the HVAC system based upon components which are indicated by a wiring harness to be physically connected to the HVAC system.
Patent CA-2044743-A1 (CA)
Title: Thermoplastic compositions of polyurethanes and partly crosslinked alkyl acrylate copolymers
Inventor: PIEJKO KARL-ERWIN
IPC: C08L75/04
Filed: 1991-06-17
Abstract: Mo3565 LeA 27,690 THERMOPLASTIC COMPOSITIONS OF POLYURETHANES AND PARTLY CROSSLINKED ALKYL ACRYLATE COPOLYMERS               ABSTRACT OF THE DISCLOSURE      The present invention is directed to a thermoplastic composition which is a blend of A) a thermoplastic polyurethane and B) an at least partly crosslinked alkyl acrylate copolymer of a C1-6 alkyl acrylate and a monomer selected from the group consisting of acrylonitrile, styrene, vinyl acetate, C1-6 alkyl methacrylates and mixtures thereof. The preferred compositions also contain copolymer selected from the group consisting of C1)  a thermoplastic graft product of a rubber component having a glass transition temperature below 0°C, which serves as the graft base, and at least one graft monomer selected from the group consisting of styrene, .alpha.-methyl styrene, acrylonitrile and C1-6 alkyl methacrylate, C2)  a rubber-free resin copolymer of styrene or .alpha.-methyl styrene with acrylonitrile, C3)  mixtures thereof.        Mo3565
Patent CA-2045549-A1 (CA)
Title: Process for the production of fatty alcohols
Inventor: WILMOTT MARTYN
IPC: C07C/
Filed: 1990-01-16
Abstract: A process is described for producing fatty alcohols. A fatty acid or fatty acid mixture is esterified in a column reactor in which there is a plurality of esterification trays each having a predetermined liquid hold-up and containing a charge of a solid esterification catalyst thereon, e.g. an ion exchange resin containing -SO3H and/or -COOH groups. A liquid phase containing the fatty acid or fatty acid mixture flows down the column reactor from one esterification tray to the next downward one against an upflowing lower alkanol vapour stream, e.g. methanol vapour. Relatively dry lower alkanol vapour (water content not more than 5 mole %) is injected into the bottom of the column reactor. Water of esterification is removed from the top of the column reactor in the vapour stream, whilst ester product is recovered from the sump of the reactor. As the liquid flows down the trays it encounters progressively drier lower alkanol. The ester product recovered from the bottom of the reactor has an ester content of at least 99 mole %  (calculated on a lower alkanol free basis). This ester product is then subjected to vapour phase hydrogenation, using typically a reduced copper oxide-zinc oxide catalyst. The resulting mixture contains, in addition to at least about 0.5 mole % up to about 5 mole % of unreacted ester, product fatty alcohol or alcohols and lower alkanol, there being no need to separate the lower alkanol from the ester if the lower alkanol is methanol. This is distilled to yield a fatty alcohol fraction which contains a minor amount of a lower alkyl (e.g. methyl) fatty acid ester or esters. The fatty alcohol fraction is subjected to transesterification to convert substantially all of any lower alkyl ester present to wax ester or esters. The resulting lower alkanol (e.g. methanol) is partially evaporated. Then the intermediate transesterification mixture is distilled to recover fatty alcohols. The residue from this distillation step is mixed with excess lower alkanol and again transesterified to reconvert wax ester or esters to lower alkyl esters. This mixture is re-distilled and the recovered mixture of lower alkanol, methyl fatty acid esters, and fatty alcohol or alcohols can be recycled. If an alkyl titanate is used as transesterification catalyst then both distillation steps can be effected without prior separation of the catalyst and the non volatile residue from the second distillation step can be recycled to the first transesterification step.
Patent CA-2047167-A1 (CA)
Title: Cement compositions
Inventor: GRAHAM NEIL B
IPC: C08K7/02
Filed: 1990-02-15
Abstract: The incorporation of cross linked polymeric particles derived from a vinyl or vinylidene group containing monomer especially an ester of acrylic or methacrylic acid into the liquid phase of a two phase self polymerisable resin cement has been found to be advantageous. It reduced the exotherm produced on mixing the solid and liquid phase components and the degree of shrinkage upon setting. The novel cements find application as dental cements and more especially as bone cements.
Patent CA-2047349-A1 (CA)
Title: Mounting structure of rotary dimmer switch and coupling for floor lamp
Inventor: WANG GARY
IPC: F21V21/00
Filed: 1991-07-18
Abstract: ABSTRACT OF THE DISCLOSURE          A rotary dimmer switch mounting structure for a  floor  lamp,  comprising two  tubes  connected  by  a pipe  connector  and fastened in a floor  to  support  a lamp,  and a rotary dimmer switch received  inside  said pipe  connector  and  said tubes  and  controlled  by  a revolving  shaft  to  regulate the  intensity  of  light produced  by said lamp, wherein said pipe connector  has an elongated notch longitudinally extending from  either end edge thereof for receiving said revolving shaft  and therefore, the caliber of said tubes can be smaller than the total height of the revolving shaft.
Patent CA-2049080-A1 (CA)
Title: Assembly for flow regulation and for opening a flow-through conduit for liquids under pressure
Inventor: RAAB ALFRED
IPC: G05D7/01
Filed: 1991-08-13
Abstract: An assembly for regulating the flow of liquid includes a housing made of a first, second and third housing part. The housing parts being placed immediately following one another in the flow direction.  The second of three housing parts constitutes a component of a discharge shutoff valve and a component of a flow regulating valve into which a flow-through conduit is integrated between the discharge shutoff valve and the flow regulating valve immediately following it in the flow direction.   The assembly includes no freely moving parts and is distinguished by a compact construction.
Patent CA-2049987-A1 (CA)
Title: Package blank and method for producing a package
Inventor: NORDLUND KAI
IPC: B65D81/02
Filed: 1991-01-23
Abstract: ABSTRACT            The invention relates to a package blank, comprising an assembly formed by a sealed, airtight and resilient film or alike serving as wrapping material (1) and by substantially deformable inner material (2) consisting of particles.  A package blank (1,2) can be accompanied by an article (E).  A film or a like surface serving as wrapping material (1) is provided with a stiffening plate (9) or a like element which, during a package-forming operation, is adapted to receive a piercing means (10) which, during the course of depressurization, is adapted to penetrate through said film or a like serving as wrapping-material (1) as well as through stiffening plate (9) or a like element for establishing a communication between a wrapping-material confined space and vacuum-creating mechanism.  The invention relates also to a method for producing a package and to a method for manufacturing a package blank.
Patent CA-2051432-A1 (CA)
Title: Plasmodium circumsporozoite protein analogs lacking repeat sequences
Inventor: BARR PHILIP J
IPC: C07K14/445
Filed: 1990-04-11
Abstract: Recombinant immunogenic analogs of Plasmodium circumsporozoite (CS) proteins useful as malaria subunit vaccines which lack one or more of the repeat epitopes of the native CS protein but have at least one nonrepeat flanking epitope from each of the amino terminal and carboxy terminal flanking regions of the native CS  protein.
Patent CA-2051731-A1 (CA)
Title: Suspension and retraction system for endoscopic surgery and method for using same
Inventor: LABORIE RAYMOND G
IPC: A61B1/32
Filed: 1991-09-18
Abstract: ABSTRACT           A lateral suspension device, an overhead device for the midline suspension, a retractor for retracting internal organ, a retraction and suspension system including operably connected these devices and a method of exposing any desired portion of body cavity during endoscopic surgery including deep laparoscopic surgery or selective large bowel, pancreatic, splenic gastric, heart, hepatic laparoscopic surgery, or gynecological procedures.
Patent CA-2051986-A1 (CA)
Inventor: BADER JOSEPH F
IPC: G08B1/00
Filed: 1991-09-20
Abstract: An emergency signalling system is disclosed that incorporates an emergency signalling device including a light source and reflector mounted for relative rotation in incremental steps in either clockwise or counterclockwise directions.  A programmable control unit of the signalling system provides digital signals to a drive source for controlling the speed and direction of the relative rotation.  In response to the digital signals, the signalling device executes a variety of different visual patterns.  The signalling system can be programmed from a keyboard preferably integrated into a control head mounted to a dashboard area of a vehicle incorporating the emergency signalling system.  Virtually any type of visual warning pattern based on the relative rotation of a light source and reflector can be executed by the signalling device if properly programmed.
Patent CA-2052712-A1 (CA)
Title: High efficiency water treatment system
Inventor: NORTON WILLIAM W
IPC: B01D61/08
Filed: 1991-10-03
Abstract: HIGH EFFICIENCY WATER TREATMENT SYSTEM                ABSTRACT OF THE DISCLOSURE           A system  for treating  a portion  of water passing through a pressurized water conduit.  The system comprises water treatment means such as a reverse osmosis module.  An upstream branch line communicates between the pressurized water conduit and the inlet of the water treatment means.  Another branch line is provided for connection with pressurized water conduit at a location downstream  from  the  upstream  branch   line,   and communicating with a water outlet of the treatment means.          A  flow  restrictor  is  provided,  positioned  in  the pressurized water conduit between the conduit connection locations of the respective branch lines.  Thus, water can flow through the upstream branch line  from the conduit to the water treatment means, and water can flow from the treatment means through the other downstream branch line back to the conduit when water is flowing through the pressurized water conduit.
Patent CA-2053329-A1 (CA)
Title: Apparatus for reproducing musical accompaniment information
Inventor: OKAMURA MASAHIRO
IPC: G10H1/38
Filed: 1991-10-11
Abstract: ABSTRACT OF THE DISCLOSURE     There are disclosed an apparatus adapted to generate musical information of a synthetic sound in accordance with the MIDI (Musical Instrument Digital Interface) standard to carry out PCM (Pulse Code Modulation) recording of a natural effect sound including natural sound and/or a human voice such as back chorus to mix them to generate a musical accompaniment, thus to mix a voice of singing sung with the musical accompaniment, and a recording medium used for such an apparatus.
Patent CA-2055190-A1 (CA)
Title: Polymers of carbon monoxide with styrene
Inventor: DE JONG ABE W
IPC: C08G67/02
Filed: 1991-11-08
Abstract: A B S T R A C T            POLYMERS OF CARBON MONOXIDE WITH STYRENE    Novel linear alternating polymers of carbon monoxide with styrene and/or with one or more substituted styrenes, having a number average molecular weight above 30,000, can be prepared by polymerizing the monomers using a catalyst composition based upon: a) a Group VIII metal compound, b) a nitrogen bidentate ligand with the general formula   in which X and Y represent identical or different organic bridging groups which each contain three or four atoms in the bridge, of which at least two are carbon atoms, c) an acid with a pKa < -3, and d) an organic oxidizing agent.
Patent CA-2056161-A1 (CA)
Title: Shroud
Inventor: DYSON JAMES
IPC: B04C5/26
Filed: 1991-11-25
Abstract: A shroud for use in a dual inner and outer cyclonic vacuum cleaner (10) is described. The shroud has a cylindrical section (50c, 132) adjacent an inner surface 15b, 111b) of a cyclonic container (15,111) and preferably comprises a combined shroud disc unit (50). The combined shroud and disc unit fits on the outside surface (20c) of the inner cyclone (20) and aids in removal of first and fibrous matter from the airflow in the outer cyclone (15). Improved airflow between the outer cyclone (15) and inner cyclone (20) is achieved because of the shroud and disc unit (50). <IMAGE>
Patent CA-2058465-A1 (CA)
Title: Field effect transistor
Inventor: KUWATA NOBUHIRO
IPC: H01L29/812
Filed: 1991-12-24
Abstract: Abstract of the Disclosure This invention aims at providing an high output FET having a planar type-gate structure suitable for integration, and a structure that suppresses long gate effect.  A heavily doped thin channel layer 13 is formed on a semiconductor substrate 11, and a cap layer including a doped layer 15 is formed on the channel layer 13.  A thickness and a dopant concentration of the doped layer 15 are so set that the doped layer 15 per se is depleted hy a surface depletion region resulting from an interface level of the semiconductor substrate surface, and the surface depletion region does not widen to the channel layer 13.  Consequently no long gate effect takes place on the side where a gate bias is lower.
Patent CA-2061949-A1 (CA)
Title: Electronic circuit package
Inventor: KANEKAWA NOBUYASU
IPC: G11C5/00
Filed: 1992-02-27
Abstract: An electronic circuit package has a wiring substrate, at least two semiconductor chips and a bus line.  All the semiconductor chips are connected by means of the bus line and are bare chip packaged on a substrate.  The chips and the wiring substrate are connected by wiring bonding between pads formed on the chips and the substrate.  The substrate may be a multilayer.  Preferably, there is an insulating layer partially formed on a surface of the multilayer substrate, and a die bonding ground is formed on a surface of the insulating layer in order to use a portion of the substrate under the ground as a wiring or hole region.  At least one of the chips is formed on the die bonding ground.  The bus line preferably includes two data bus lines, the chips connected to one data bus line being located on one side of the substrate and the chips connected to the other data bus line being located on the other side of the substrate.
Patent CA-2062802-A1 (CA)
Title: Silicone elastomer lined prosthetic devices and methods of manufacture
Inventor: WARUNEK STEPHEN P
IPC: A61K6/896
Filed: 1991-05-02
Abstract: Organopolysiloxane elastomers comprising copolymers of dimethyl and methylvinyl siloxanes provide improved facial and dental prosthetic materials, and are especially useful in preventing and treating chronic tissue irritation due to hard dental polymers. They are effectively bonded to polymeric and metallic substrates as denture liners, obturators, maxillofacial prosthetic devices and appliances with a group of trifunctional silane coupling agents.
Patent CA-2065613-A1 (CA)
Title: Self-contained downhole gauge system
Inventor: ANDERSON TERRY O
IPC: E21B47/12
Filed: 1992-04-08
Abstract: Abstract A   self-contained   memory   gauge   includes   either semiconductor or magnetic core memory for retaining downhole information related to sampled parameters, such as borehole temperature and pressure.   A microprocessor-based computer manages the power utilization by independently and selectably energizing and de-energizing different sections of the gauge.          The magnetic core memory is tested for operability, and the addressing  of  the  magnetic  core  memory  is  adjusted  in accordance with any inoperable memory locations.  Samples of the  monitored  environmental  conditions  can  be  taken  at variable rates dependent upon software monitoring of the condition, the remaining battery life and the remaining memory capacity  and  in response to hardware monitored pressure changes.  Each sample can be taken to a selectable resolution.          A watchdog circuit monitors the microprocessor to insure that it is operating within a preselected time limit.
Patent CA-2071873-A1 (CA)
Title: Method and apparatus for producing variable intensity in a piano performance
Inventor: STAHNKE WAYNE L
IPC: G10F1/02
Filed: 1991-08-21
Abstract: A piano is equipped with electromechanical actuators (12) which are individually associated with and operate the keys (14) to reproduce a piano performance. The actuators (12) are selectively energized according to the notes to be played to recreate a piano performance. When an actuator (12) is energized, individual pulses of uniform width are selected from a pulse train and applied to the actuator, with the number of selected pulses varying the overall drive energy supplied to the actuator to closely approximate a desired drive or note intensity.