baber/WOPTO huggingface dataset:
Patent CA-2027223-A1 (CA)
Title: Process for preparing copolymers of .alpha.-methylstyrene and acrylonitrile
Inventor: HENTON DAVID E
IPC: C08F212/10
Filed: 1990-10-10
Abstract: Abstract of the Invention Copolymers of alpha-methylstyrene and acrylonitrile having improved composition of uniformity are prepared by emulsion polymerizing a first monomer stream having a weight ratio of alpha-methylstyrene/acrylonitrile from 75/25 to 85/15 until the amount of unreacted alpha-methylstyrene plus acrylonitrile based on total monomer and polymer weight is 20-45 percent and the excess of unreacted alpha-methylstyrene monomer is from 670 to 5000 weight percent based on unreacted acrylonitrile, thereafter polymerizing a second monomer feed stream comprising acrylonitrile until the amount of unreacted alpha-methylstyrene plus acrylonitrile remaining in the reactor is 5-15 percent based on total monomer weight, and continuing the emulsion polymerization until total monomer conversion reaches at least 90 percent.   35,455A-F
Patent CA-2029960-A1 (CA)
Title: Process for the preparation of extrudates, extrudates, and use of the extrudates
Inventor: REINALDA DONALD
IPC: B01J37/02
Filed: 1990-11-14
Abstract: Process for the preparation of extrudates suitable for use in the manufacture of catalysts or catalyst carriers, especially Fischer-Tropsch catalysts, comprising mulling a mixture of finely divided silica, a water soluble compound derived from a metal selected from group IVb of the Periodic Table and water, the mixture having a solids content of 20 to 50% by weight, and extruding the mixture. After drying and/or calcining, the extrudates may be impregnated with one or more suitable metal compounds, optionally followed by drying, calcination and/or activation, and used as a catalyst.
Patent CA-2030386-A1 (CA)
Inventor: WIEDERHOFT GERHARD
IPC: C01G23/053
Filed: 1990-11-20
Abstract: In the production of TiO2 pigments by the steps of digesting titanium-containing raw materials with sulfuric acid, hydrolyzing the titanyl sulfate obtained, separating the waste acid from the hydrolyzate, bleaching the hydroly-zate and calcining the hydrolyzate after addition of rutilizing nuclei and standardizing chemicals to form TiO2 pigments, and recovering sulfuric acid from the waste acid, the improvement which comprises employing as the rutilizing nuclei nuclei produced from part of the bleached and then washed hydrolyzate, which nuclei are added to the remainder of the bleached and washed hydrolyzate before calcination.
Patent CA-2032895-A1 (CA)
Title: Apparatus for converting synthetic resin into oil
Inventor: YAMAGUCHI TAKUO
IPC: C08F2/00
Filed: 1990-12-20
Abstract: ABSTRACT     An apparatus for converting synthetic resin into oil according to the present invention thermally decomposes the synthetic resin by heating  the  same  in  a heat vessel,  thereby producing oil. The apparatus  comprises the heat vessel  and a heating furnace.  The synthetic resin fed into the heat vessel stirred.  At least the lower part of the heat; vessel is disposed in  the heating furnace.  By providing a radiating fin on the outer surface of the upper part of the heat vessel disposed outside the heating furnace or providing a heat-insulator on the outer surface of the upper part of the heat vessel disposed in the heating furnace, the temperature rise in the upper part of the heat vessel limited.
Patent CA-2032943-A1 (CA)
Title: Digital controller for gas discharge tube
Inventor: DOROFTEI MIHAIL
IPC: H05B41/392
Filed: 1990-12-21
Abstract: A gas discharge tube is controlled in intensity and in the length along such tube that is illuminated by providing digital control signals to an analog drive circuit connected to the high-voltage energization device for the tube.  A pulse-width modulated digital control signal containing illumination length and intensity information is converted to ramp-shaped analog drive pulse that control the voltage at a high-voltage transformer secondary to which the gas discharge tube is connected.  A manually actuatable keypad permits the user to enter the information that is then converted to the pulse-width modulated signal.
Patent CA-2033027-A1 (CA)
Title: Electro-hydraulic valve actuator
Inventor: RICHESON WILLIAM E JR
IPC: F01L9/20
Filed: 1990-12-21
Abstract: ABSTRACT OF THE DISCLOSURE:           A fast acting valve actuator for actuating an intake or exhaust valve in an internal combustion engine of a type which is hydraulically powered and command triggered is disclosed and includes a cylinder with a power piston having a pair of opposed working surfaces or faces reciprocable within the cylinder along an axis between first and second extreme positions. A cylindrical control valve is located radially intermediate the reservoir and the cylinder, and is movable upon command to alternately supply high pressure fluid from a reservoir of high pressure hydraulic fluid to one face and then the other face of the power piston causing the piston to move from one extreme position to the other extreme position. The cylindrical control valve may be a shuttle valve which is reciprocable along the axis of the power piston between extreme positions with control valve motion along the axis in one direction being effective to supply high pressure fluid to move the piston in the opposite direction. Both the control valve and the piston are stable in both of their respective extreme positions and the control valve is spring biased toward a position intermediate the extreme positions. The latter portion of piston motion during one operation of the valve actuator is effective to cock this spring and bias the control valve preparatory to the next operation.
Patent CA-2034853-A1 (CA)
Inventor: FAUST TILLMANN
IPC: C12P25/00
Filed: 1991-01-24
Abstract: Riboflavin is removed from fermentation suspensions by them being heated at from 50 to 90°C for from 1 to 3 hours, then cooled to from 0 to 30°C over a period of from 1 to 5 hours, and subsequently being centrifuged to give a sediment fraction and liquid fraction in such a way that the sediment fraction contains predominantly riboflavin crystals as solid, and the liquid fraction contains virtually no crystalline riboflavin, and, where appropriate, resuspending the sediment fraction in from 0.5 to 2 parts by volume of water per part by volume of sediment fraction and repeating procedure c.
Patent CA-2036727-A1 (CA)
Inventor: GO HISAO
IPC: G02B6/42
Filed: 1991-02-20
Abstract: An optical module comprises at least one optical sub-module having at least one optical connector for receiving an end portion of an optical fiber at an end portion of the optical connector so as to optically couple the end portion of the optical fiber with an optical operation element, and a molded resin member for holding the optical connector except for the end portion of the optical connector; and at least one receptacle for enveloping the end portion of the optical connector to integrally hold the optical sub-module, the receptacle having an opening portion for fitting with an optical plug holding the end portion of the optical fiber which is to be received by the optical connector.  The receptacle is resin-molded by using a mold die including a core for forming an opening portion of the optical module, the core having at least one hold portion for holding a portion of the optical sub-module.
Patent CA-2042710-A1 (CA)
Inventor: LAMBLA MORAND
IPC: C08G18/34
Filed: 1991-05-16
Abstract: La présente invention concerne un procédé pour l'obtention de polyamides-imides semi-ordonnés. Plus particulièrement il consiste à réaliser la polycondensation en deux phases distinctes: 1) réaction entre une partie d'un diisocyanate aromatique et la totalité de l'anhydride trimellique en présence de diméthylalkylène urée de pH ? 7 jusqu'à dissolution du composé intermédiaire, 2) addition successivement de un ou plusieurs diacides aromatiques et du reste du diisocyanate aromatique dans la diméthylalkylène urée de pH ? 7 jusqu'à dissolution complète du polyamideimide obtenu. Les polymères semi-ordonnés ainsi obtenus possèdent un TG inférieur aux polymères statistiques ce qui facilite leur mise en forme.
Patent CA-2042964-A1 (CA)
Title: Aqueous coating composition
Inventor: KUWAJIMA TERUAKI
IPC: C09D5/02
Filed: 1991-05-21
Abstract: ABSTRACT OF THE DISCLOSURE       Disclosed is an aqueous coating composition which keeps in high nonvolatile contents during coating operation and capable of being effectively applied even under a relatively high humidity condition.  The coating composition imparts high orientation of metallic pigment particles to the cured film.  The aqueous coating composition of the present invention comprises a specific acryl polymer varnish (a) and a specific urethane oligomer dispersion.
Patent CA-2048250-A1 (CA)
Title: Soil or aggregate water resistant stabilizing agent
Inventor: RAHU GHEORGE
IPC: C09K17/40
Filed: 1991-07-03
Abstract: ABSTRACT     This invention  related to a new water resistant combination used for soil or aggregate stabilization.     More precisely, this invention relates to  a new  water resistant stabilizing agent  usefull in  a variety of applications, chiefly for the stabilization of the base or sub-base of roads.
Patent CA-2048940-A1 (CA)
Title: Jamming apparatus for electronic article surveillance systems
Inventor: DRUCKER FRANK
IPC: G08B21/00
Filed: 1991-08-12
Abstract: Abstract of the Disclosure In an electronic article surveillance system, a jamming apparatus is provided for establishing a jamming zone in which tags can be situated and not respond to message signals from a surveillance system transmitter and in which the surveillance system receiver can be situated and still respond to tag signals.
Patent CA-2049136-A1 (CA)
IPC: B62D5/32
Filed: 1991-08-13
Abstract: Abstract A two-loop steering system for motor vehicles comprises a main loop (8) and an auxiliary loop (9). A change-over device (24) connects the steering handwheel (7) in normal operation to the main loop steering unit (10) and in the event of a fault in the main loop connects it to the auxiliary loop steering unit (17).   Each motor chamber (4, 5) is connected with the help of a change-over valve (34, 35) in normal operation to a motor line (11, 12) of the main loop steering unit and in the event of a fault in the main loop to the associated motor line (18, 19) of the auxiliary loop steering unit.   In this manner sluggish steering is avoided, whilst nevertheless ensuring that in an emergency the steering system can continue to be operated safely.
Patent CA-2050507-A1 (CA)
Inventor: ABRAMS LANE J
IPC: H04L29/02
Filed: 1991-09-03
Abstract: Disclosed is a message oriented interface for communication between a Bank Controller Unit and peripheral devices, such as channel units, in digital loop transmission systems. At least four registers are used for each peripheral device. Two registers are utilized to transmit control signals, and two registers are for data transmission. An additional data register can hold the last byte read by the Bank Controller Unit in the event of an error so the byte can be re-read. The last byte of each message, which is utilized for error detection, is the exclusive OR function of the corresponding bits in all the previous bytes of the message. A service request can be asserted by a peripheral device to the Bank Controller Unit when a control signal is present in one of the registers. Means are also provided for indicating when a register is busy.
Patent CA-2051081-A1 (CA)
Inventor: WILLIAMS DENNIS A
IPC: E21B41/02
Filed: 1991-09-10
Abstract: Corrosion inhibitor additives are added directly to an aqueous acid solution used in acidizing subterranean formations. The additives consist essentially of a metal  selected from antimony and antimony mixtures, a quaternary compound, and a surfactant.  The corrosion inhibitor is free of toxic acetylenic compounds.
Patent CA-2051775-A1 (CA)
Title: Polyimide film with metal salt coating resulting in improved adhesion
Inventor: MILLIGAN STUART N
IPC: C08J7/02
Filed: 1991-09-18
Abstract: TITLE POLYIMIDE FILM WITH METAL SALT COATING     RESULTING IN IMPROVED ADHESION   ABSTRACT OF THE DISCLOSURE    A polyimide film is describerd having improved adhesion prepared by coating the surface of a partially cured or partially dried polyamide acid film with an organic solvent solution of a metal salt and heating the coated film to both convert the polyamide acid to polyimide and dry the film.  By proper selection of the metal salt either a one-side adherable or two-side adherable polyimide film can be obtained.  The polyimide film can be used in electrical insulating and flexible printed circuit applications where superior adhesion is an important requirement.
Patent CA-2052349-A1 (CA)
Title: Communication control system using an asynchronous transfer mode network.
Inventor: KOJIMA MUTSUMI
IPC: H04L12/70
Filed: 1991-09-27
Abstract: A communication control system using an ATM network and constructed by a small number of virtual connections.   Fixed or semi-fixed virtual connection connect each user interface and a corresponding connectionless service processor and interconnect the connectionless service processors.  A data packet received from a user terminal is converted into an ATM cell by the user interface and delivered to the connectionless service processor through the virtual connection.   In the connectionless service processor, an ATM cell is transferred into a virtual connection located in the direction in which the destination user interface is provided to thereby carry out routine to the ATM cell.
Patent CA-2053746-A1 (CA)
Title: Lithium ion rechargeable intercallation cell
Inventor: SLANE STEVEN M
IPC: H01M4/58
Filed: 1991-10-18
Abstract: ABSTRACT OF THE DISCLOSURE       A lithium ion rechargeable intercallation cell is provided including a lithiated graphite anode, a lithiated oxide cathode, and a solution of a lithium salt in a solvent that cycles both the lithiated graphite anode and the lithiated oxide cathode as the electrolyte.
Patent CA-2055990-A1 (CA)
Title: Phospholipid-vitamin derivatives and methods for preparation thereof
Inventor: SCHENA DAVID G
IPC: A61K9/127
Filed: 1991-11-21
Abstract: PHOSPHOLIPID-VITAMIN DERIVATIVES AND METHODS           FOR PREPARATION THEREOF                            ABSTRACT Novel phospholipid-vitamin derivatives are described. The phospholipid-vitamin derivatives of this invention are advantageously prepared by reacting a phospholipid with a vitamin or vitamin derivative containing a primary hydroxyl group, in the presence of a microbial phospholipase-D. The resulting phospholipid-vitamin derivatives are useful as free-radical scavengers, anti-oxidants and as fat-soluble derivatives of vitamins.
Patent CA-2058247-A1 (CA)
Title: Tert-butyloxcarbonyl-1-tyrosyl-peptidoglycan monomer and 1251-labelled derivative thereof, their preparation and use
Inventor: LJEVAKOVIC DJURDJICA
IPC: A61P37/04
Filed: 1991-12-20
Abstract: ABSTRACT   The present invention relates to the novel ten-butyloxycarbonyl-L-tyrosyl-peptidoglycan monomer   I and to its 125I-labelled Boc-Tyr-PGM derivative; to the preparation and use thereof as pharmaceuticals of immunostimulating and antitumor activity.
Patent CA-2059908-A1 (CA)
Title: Process for the preparation of racemic and optically active 1,2,3,4-tetrahydroisoquinoline-3-carboxylic acid and its precursors
Inventor: KAMMERMEIER BERNHARD
IPC: C07D217/26
Filed: 1992-01-23
Abstract: A process for the preparation of racemic and optically active 1,2,3,4-tetrahydroisoquinoline-3-carboxylic acid is described, in which dihalo-o-xylylenes are cyclized to dicarboxylic acid esters in basic medium using dialkyl N-acylamidomalonates of the formula (CO2R1)2CHNHCOR2, in which R1 is (C1-C4)-alkyl and R2 is H, (C1-C4)-alkyl or (C6-C12)-aryl, decarboxylated by basic hydrolysis and subsequent acid work-up and then reacted in acid medium to give (D,L)-1,2,3,4-tetrahydroisoquinoline-3-carboxylic acid, or dihalo-o-xylylenes are cyclized in basic medium to give the dicarboxylic acid esters and these are reacted directly without isolation in a one-pot process to give (D,L)-1,2,3,4-tetrahydroisoquinoline-3-carboxylic acid, if desired the racemic 1,2,3,4-tetrahydroisoquinoline-3-carboxylic acid is reacted with (-)menthol and p-toluenesulfonic acid to give (-)menthyl (D)- or (L)-1,2,3,4-tetrahydroisoquinoline-3-carboxylate, then the diastereomers are separated by column chromatography and subjected to basic hydrolysis to give (D)- or (L)-1,2,3,4-tetrahydroisoquinoline-3-carboxylic acid, or (D,L)-1,2,3,4-tetrahydroisoquinoline-3-carboxylic acid is esterified by means of benzyl alcohol and p-toluenesulfonic acid, reacted with D(-)mandelic acid to give benzyl (D)-1,2,3,4-tetrahydroisoquinoline-3-carboxylate (D)-mandelate and benzyl (L)-1,2,3,4-tetrahydroisoquinoline-3-carboxylate (D)-mandelate or with L(+)mandelic acid to give benzyl (D)-1,2,3,4-tetrahydroisoquinoline-3-carboxylate (L)-mandelate and benzyl (L)-1,2,3,4-tetrahydroisoquinoline-3-carboxylate (L)-mandelate and then the compounds obtained are separated into the optical antipodes by fractional crystallization in an inert solvent and the enantiomers (D)- or (L)-1,2,3,4-tetrahydroisoquinoline-3-carboxylic acid are liberated by basic hydrolysis, the chiral auxiliary reagent being recovered.
Patent CA-2062018-A1 (CA)
Title: Method and apparatus for communicating amplitude modulated signals over an optical communication path
Inventor: HUBER DAVID R
IPC: H04L27/02
Filed: 1992-02-27
Abstract: ABSTRACT OF THE DISCLOSURE      A block of amplitude modulated television channel signals frequency modulates an optical communication path.  In one embodiment, the AM modulated channel signals FM modulate an RF subcarrier which, in turn, is used to intensity modulate an optical carrier for transmission. Frequency modulation of the RF subcarrier by the amplitude modulated channel signals is advantageously performed at microwave frequencies. The FM modulated subcarrier signal is then converted down to a frequency range compatible with transmitter and receiver components used in the system.  The frequency modulation and conversion can be performed by a pair of voltage controlled oscillators coupled in a push-pull mode of operation.  The outputs of the oscillators are combined in a double balanced mixer to down convert the FM signal spectrum.  In another embodiment, the optical frequency of an optical carrier is FM modulated by the block of AM signals.  Receivers for the FM modulated band of AM channel signals are also disclosed.
Patent CA-2063395-A1 (CA)
Title: Process for rendering inert and/or immobilizing enviromentally harmful substances
Inventor: JUNG FRITZ
IPC: C02F/
Filed: 1990-07-16
Abstract: A process is useful for rendering inert and/or immobilizing inorganic and/or organic environmentally harmful substances in aqueous dispersion, suspensions, emulsions and/or solutions of waste materials. At least one inorganic binder, in particular based on portland cement clinker, clay cement klinker and/or hydraulic lime, is added to the dispersion, suspension, emulsion and/or solution, possibly before, during or after a treatment to precipitate and/or convert the heavy metals, sulphur compounds, other harmful substances and/or organic compounds in the dispersion, suspension, emulsion and/or solution. A homogeneous mixture of the harmful material(s) and the binder(s) in the dispersion, suspension, emulsion and/or solution is obtained, preferably by stirring. If necessary it undergoes gravity separation, after which its water content is reduced, preferably by compressing it in a press.
Patent CA-2067771-A1 (CA)
Title: Bed
Inventor: TOIVIO ILKKA
IPC: A61G7/05
Filed: 1990-10-26
Abstract: The present invention relates to a bed, particularly a patient bed, which comprises an underlay (1) for the patient; a support frame (2), including at least one support member (2a), which is arranged above the underlay (1); and suspension means, such as straps (3), whereby the underlay (1) is suspended from the support member (2a).
Patent CA-2067916-A1 (CA)
Inventor: ROTHLEIN ROBERT
IPC: G01N33/68
Filed: 1992-05-01
Abstract: A method for the detection of the presence of inflammation in a patient by measuring the amount of circulating intercellular adhesion molecule (cICAM-1) in a sample of one or more bodily fluids of the patient and then comparing the amount of cICAM-1 in the sample to standards normal for the bodily fluid or fluids assayed. The amount of cICAM-1 can be measured using anti-ICAM-1 antibodies. Higher than normal amounts of cICAM-1 indicate the presence of inflammation.
Patent CA-2068189-A1 (CA)
Title: Single use spray dispensing assembly
Inventor: SCHWARTZBAUER NEIL J
IPC: B05B7/04
Filed: 1992-05-07
Abstract: ABSTRACT       A disposable spray dispensing assembly for liquid materials includes a container that comprises an aerosol can, and a spray head initially detached from the container.  A cap is connected to the container and includes a central recess extending into the chamber and presenting a hole.  A tube within the chamber is connected to a cylindrical wall surrounding the recess. The cap is non-releasably connected to the container and hinders refilling of the chamber in order to reduce the likelihood that the chamber might contain a material different than the contents indicated on the container's label.  A plug is provided for selectively closing the hole when the spray head is not connected to the hole.
Patent CA-2070554-A1 (CA)
Title: Amphibian aircraft
Inventor: TORMAKHOV ALEXEI J
IPC: B64C35/00
Filed: 1992-06-05
Abstract: ABSTRACT             The invention relates to an amphibian aircraft incorporating a hydrodynamic system formed by three floats wherein the first two floats are attached of a fuselage leading portion symmetrically to the aircraft axis and the third float is attached to a fuselage trailing portion along the aircraft axis of symmetry.  The distance between the floats renders it possible to place a trailing float out of the zones of the water surface disturbed by hydroplaning is shifted behind the steps of the bottoms of the is ading floats to the trailing portion of the fuselage.
Patent CA-2071042-A1 (CA)
Title: Flame retardant polyester blends
Inventor: GRAY KEITH N
IPC: C08K5/1515
Filed: 1992-06-11
Abstract: ABSTRACT     This invention relates to flame retardant thermoplastic molding compositions, comprising:     (a) a polyester resin derived from a cyclohexanedimethanol and a carbocyclic dicarboxylic acid or ester;     (b) a tetra brominated bisphenol-A epoxy oligomer endcapped with epichlorohydrin flame retardant; and (c) a reinforcing agent. The compositions of the present invention have excellent thermal stability and other mechanical properties.
Patent CA-2073038-A1 (CA)
Title: Procede d'elimination de composants condensables dans des courants gazeux
Inventor: WIJMANS JOHANNES G
IPC: B01D53/22
Filed: 1990-11-07
Abstract: Procédé de traitement d'un courant gazeux, permettant d'éliminer ou de récupérer un constituant condensable. Le procédé met en oeuvre un étape de condensation ainsi qu'une étape de concentration sur membrane. L'étape de condensation peut être suivie par l'étape de la membrane, ou vice versa. Le procédé peut être conçu pour produire uniquement deux courants de produits: 1) le liquide condensé (5), prêt à être utilisé, réutilisé ou rejeté, et 2) un courant gazeux résiduel (8), lequel dans la plupart des cas sera suffisamment nettoyé pour être déchargé ou réutilisé directement. On parvient à ce résultat par recyclage d'autres courants dans le procédé. On peut obtenir une récupération de 90 % ou plus du constituant condensable. Le procédé permet de réaliser des économies d'énergie substantielles par rapport à la condensation seule.