baber/WOPTO huggingface dataset:
Patent CA-2031611-A1 (CA)
Title: Process for increasing the direct esterification reaction rate of a diacid with a glycol
Inventor: LOWE DAVID J
IPC: C07C69/82
Filed: 1990-12-05
Abstract: A process for increasing the direct esterification reaction rate between a diacid and 1,4-butanediol and for directly esterifying greater than 95% of the acid ends of the diacid by mixing in any order the diacid, the 1,4-butanediol and a catalyst compound selected from organo-titanium, organo-tin, and organo-zirconium compounds, to form a reaction mixture wherein the ratio of diol:diacid is at least 2:1 and then reacting the reaction mixture at an average temperature ranging between 190°C to 240°C for a period of time no longer than sixty minutes. The same process may be followed substituting ethylene glycol for 1,4-butanediol, provided the catalyst . compound is added neat, further provided that the average reaction temperature ranges from 190°C to 200°C, and also provided that the reaction mixture be reacted for a period of time no longer than seventy minutes. The product resulting from this process may be polycondensed or further treated to form a high molecular weight polymer.
Patent CA-2032261-A1 (CA)
Title: Antiviral polyheterocyclic dimers
Inventor: MURRER BARRY A
IPC: C07D257/02
Filed: 1990-12-14
Abstract: Pharmaceutical compositions containing as active ingredients a linked cyclic compound of the general formula I      Z - (A)n - Y (I) in which Z and Y are independently polyheterocyclic moieties having from 9 to 32 ring members and from 3 to 8 amine heteroatoms, especially nitrogen, in the ring, A is a linking atom or group, and n is 0 or an integer from 1 to 6, are indicated for the treatment of viral infections, and preventative administration, especially for retroviral infections.
Patent CA-2032391-A1 (CA)
Title: Apparatus for installing or removing shaft furnace tuyeres of tymps
Inventor: MAILLIET PIERRE
IPC: C21B7/16
Filed: 1990-12-17
Abstract: The apparatus comprises a hydraulic ram (28) mounted on a movable support designed to be placed in line with the axis of the tuyere or tymp so as to bear on the furnace wall and to act on a gripper (30) composed of two telescopic members respectively displaceable relative to one another in the axial direction of the tuyere or of the tymp in order to ensure the support of the latter, said gripper (30) being axially displaceable through the action of said ram. The hydraulic ram (28) is a double-piston ram comprising a traction piston (38) acting on a pulled member (32) of the gripper (30) and a thrust piston (42) acting on a propelled member (34) of the gripper (30), and is consequently suitable far all forms of tuyeres and tymps.
Patent CA-2033560-A1 (CA)
Title: Sulfur dioxide removal from flue gases with sulfite oxidation inhibition
Inventor: LEE YUNGLI J
IPC: B01D53/34
Filed: 1991-01-03
Abstract: A method for removing sulfur dioxide from flue gases in a wet scrubbing system where calcium thiosulfate and calcium polysulfides are formed by the reaction of lime and emulsified sulfur and the mixture added to a recycle tank of the wet scrubber where it reacts with sulfites and bisulfites in the scrubbing slurry to produce thiosulfates from the calcium polysulfides, with the slurry then returned to the scrubber.  The mixture of calcium thiosulfate and calcium polysulfides may be formed in the lime slaking tank or lime storage tank of a line scrubbing system or formed in a mixing tank and added to a lime or limestone scrubbing system.
Patent CA-2037176-A1 (CA)
Title: Metal studs
Inventor: PALUMBO JOSEPH D
IPC: E04C3/04
Filed: 1991-02-27
Abstract: ABSTRACT An integral metal stud with a main wall and two lateral walls is provided with an accordionated region which allows the stud to deflect under heavy axial load by shortening the distance between its ends, rather than by buckling in the middle region of the stud.
Patent CA-2038215-A1 (CA)
Title: Poly(aryl ether sulfone) compositions
Inventor: EL-HIBRI MOHAMMAD J
IPC: C08G75/23
Filed: 1991-03-19
Abstract: A poly(aryl ether sulfone) blend comprising (a) from about 25 to about 99 percent by weight of a poly(biphenyl ether sulfone) and (b) from about 1 to about 75 percent by weight of a second poly(aryl ether sulfone) comprising bisphenol A moieties.
Patent CA-2041028-A1 (CA)
Title: Apparatus and method for controlling a vibratory tool
Inventor: QUIBEL ALAIN JEAN
IPC: E02D3/046
Filed: 1991-04-23
Abstract: An apparatus and a method are provided for increasing the density of a compactible material while continuously evaluating the density of the maternal. The evaluation of material density is carried out by calculating the total of the static, dynamic and centrifugal forces applied by a vibrating tool to the compactible material. The total applied force calculation includes measuring the vertical acceleration of the material contacting member and the position of an eccentric mass mounted on the material contacting member. The acquisition of these parameters is carried out simultaneously, and the calculation of the dynamic and centrifugal forces is made when the material contacting member is at its lowest position.
Patent CA-2049030-A1 (CA)
Inventor: AMEUR HANAFI
IPC: G07C9/00
Filed: 1990-03-05
Abstract: 2049030 9010919 PCTABS00002 A controller card with identifying codes and an associated reading unit comprising at least one use and/or reference characteristic. Each use and/or reference characteristic included in the card consists of directions and restrictions for access or access and use of a computer or the like. The use and/or reference characteristics are arranged to co-operate with the input/output system so that the directions and restrictions which are specified by the use and/or reference characteristics will not be transgressed.
Patent CA-2049486-A1 (CA)
Inventor: KANEYAMA YOSHINOBU
IPC: H04N1/32
Filed: 1991-08-19
Abstract: Abstract of the Disclosure A method of controlling a store-and-forward switching system comprising a store-and-forward switching central unit and a plurality of terminal units comprising the steps of detecting a call from a terminal unit through a communication control unit for controlling communication between the central unit and the terminal units, inputting a request for a normal-priority multi-destination delivery communication service from a terminal unit, reading a service attri-bute table from an external storage unit and loading it into a memory, referring to the service attribute table on the memory to determine whether or not the normal priority multi-destination delivery communication service is granted to the terminal unit, determining that the normal multi-destination delivery communication service is granted to the terminal unit on the basis of a value of predetermined data in the service attribute table, performing pre-processing of protocol communication with the terminal unit through a communication control unit, receiving image data from the terminal unit via the communication control unit and storing it in said external storage unit, performing post-processing of said protocol communication through the communication control unit to disconnect a line, and writing latest communication results into a predetermined area of a memory and then terminating a series of processing steps.
Patent CA-2049855-A1 (CA)
Title: Powder coating compositions
Inventor: WAMPRECHT CHRISTIAN
IPC: C09D5/03
Filed: 1991-08-26
Abstract: Mo-3516 LeA 27,831 POWDER COATING COMPOSITIONS                 ABSTRACT OF THE DISCLOSURE     The present invention relates to powder coating compositions which are solid below 30°C and contain A)   a             copolymer component which is solid below 30°C and contains at least one copolymer having both carboxylic anhydride and hydroxyl groups, B)   an            epoxide component which contains at least one polyepoxide having at least two epoxide groups per molecule, C)   an            isocyanate component which contains at least one polyisocyanate having at least two optionally blocked isocyanate groups per molecule.
Patent CA-2049984-A1 (CA)
Title: Immunoglobulin al proteases (iga1 proteases), method of gene-technologically producing this type of enzyme and vaccines containing the enzymes and fragments thereof for immunizingagainst bacterial meningitis and other diseases caused by iga1 protease-producing bacteria
Inventor: POULSEN KNUD
IPC: A61K39/09
Filed: 1990-03-16
Abstract: Secretion of IgA1 proteases is a characteristic of Haemophilus influenzae and several other bacterial pathogens causing infectious diseases, including meningitis. Indirect evidence suggests that the proteases are important virulence factors. The iga gene encoding IgA1 protease, especially that from H. influenzae serotype b, has been cloned into Escherichia coli in which the recombinant iga gene was expressed and the resulting protease secreted.  Sequencing a part of a 7.5 kb DNA fragment containing the iga gene revealed a large open reading frame (ORF) with a strongly biased codon usage and having the potential of encoding a protein of 1541 amino acids and a molecular mass of 169 kd. Putative promoter and terminator elements flanking the ORF have been identified.  Comparing the deduced amino acid sequence of the produced H. influenzae IgA1 protease with that of a similar protease from Neisseria gonorrhoeae reveals several domains with a high degree of homology.  Analogous to mechanisms known from the N. gonorrhoeae IgA protease secretion, there is proposed a scheme of post-translational modifications of the H. influenzae IgA1 protease precursor leading to a secreted protease with a molecular mass of 108 kd which is close to the Mr 100 kd estimated for the mature IgA1 protease.
Patent CA-2050168-A1 (CA)
Title: Colour correcting system for fluorescent lighting
IPC: F21V9/02
Filed: 1991-08-28
Abstract: COLOUR CORRECTING SYSTEM FOR FLUORESCENT LIGHTING            ABSTRACT OF THE DISCLOSURE Room light, especially fluorescent lighting is corrected to provide a green-magenta balance comparable to that of natural sunlight by measuring the green-magenta balance of the lighting within the room and applying a filter to each light source to bring the balance to the desired level. This ameliorates the detrimental physiological effects of an unnatural light spectrum in a workspace.
Patent CA-2050256-A1 (CA)
Title: Process for commissioning pipelines
Inventor: POWERS MARVIN D
IPC: F17D5/00
Filed: 1991-08-29
Abstract: PROCESS FOR COMMISSIONING PIPELINES            ABSTRACT OF THE DISCLOSURE    A process for commissioning pipelines is disclosed which more safely, reliably and economically establishes product purity in the line and reduces the possibilities of structural damage to the pipeline.  These advantages are achieved through the use of a specially adapted portable heating system.  The system is capable of safely heating petrochemical products in a controlled manner and at rates sufficient to provide adequate input flows of commissioning product whose temperature is adjusted to be substantially the same as that of the nitrogen being displaced from the pipeline that is being commissioned.
Patent CA-2052228-A1 (CA)
Inventor: ALAGY JACQUES
IPC: C07B61/00
Filed: 1991-09-25
Abstract: On décrit un procédé de préparation d'au moins un oxyde borique, sous forme anhydre ou hydratée, de formule générale B2O3,xH2O dans laquelle x est un nombre de 0 à 3, par hydrolyse de borate de méthyle dans lequel on introduit, dans une zone d'hydrolyse, du borate de méthyle et de l'eau, puis on introduit dans une colonne à distiller le produit issu de la zone d'hydrolyse, au moins un composé (de préférence un hydrocarbure tel que par exemple le diméthyl-2,3 butane ou le méthyl-2 pentane) formant un hétéroazéotrope avec le méthanol, ledit hétéroazéotrope ayant un point d'ébullition inférieur à celui de l'azéotrope que forme le borate de méthyle avec le méthanol et au moins un composé ayant un point d'ébullition supérieur à celui duborate de méthyle, ledit composé ne formant pas d'azéotrope à point d'ébullitioninférieur à celui dudit hétéroazéotrope, puis on récupère en tête de colonne ledit hétéroazéotrope et en fond de colonne une suspension contenant au moins un oxydeborique. On décrit également un procédé d'oxydation d'au moins un hydrocarbure saturé choisi dans le groupe formé par le cyclohexane et les hydrocarbures saturés acycliques et cycliques ayant de 7 à 20 atomes de carbone dans leur molécule, en un produitcomprenant l'alcool correspondant selon lequel l'oxydation est effectuée, en présence d'un oxyde borique formant des esters avec l'alcool formé par oxydation, à l'aide d'un gaz contenant de l'oxygène moléculaire; le produit d'oxydation est hydrolysé en acide orthoborique et en alcool que l'on récupère par séparation de la phase organique; la phase aqueuse contenant l'acide borique est envoyé dans une zone de formation de borate de méthyle que l'on récupère sous la forme de son azéotrope avec le méthanol. Larécupération de l'oxyde borique à partir de cet azéotrope est effectuée selon le procédé décrit ci-dessus, l'oxyde borique récupéré étant recycle à l'égape d'oxydation.
Patent CA-2053708-A1 (CA)
Title: Method and apparatus for starting a free piston combustion engine hydraulically
Inventor: VILENIUS MATTI
IPC: F02B71/02
Filed: 1991-10-18
Abstract: ABSTRACT OF THE DISCLOSURE           A method of starting a free piston combustion engine is described in which the free piston unit consisting of the combustion pistons and the piston rod connecting them is set in motion by alternately pressurizing the hydraulic cylinder spaces of a double-acting piston and cylinder arrangement whose piston or piston is or are connected to the piston rod.  For this purpose pressure from a hydraulic accumulator used for starting the engine is supplied as a control pressure to the check valve members of the one way outlet check valves of the hydraulic cylinder spaces to keep those check valves closed during starting of the engine.  This control pressure supplements the spring pressure supplied by springs in the check valves biasing the check valve members towards their closed positions.  Simultaneously a directional valve is used to channel hydraulic fluid from the hydraulic accumulator directly to the cylinder spaces in turn, thereby bypassing the one way inlet check valves to the cylinder spaces.  In this way the free piston unit is set in motion. Once the free piston has performed a predetermined number of reciprocating movements or has attained a sufficient magnitude of inertial energy the hydraulic accumulator is disconnected so that the inlet and outlet valves can perform their normal function, while simultaneously or just before or just after this moment fuel combustion is initiated to maintain the engine in operation.  An electronic controller responsive to signals from sensors mounted on the engine from which can be derived information about the position and speed  of the free piston unit can be used to control starting and operation of the engine.
Patent CA-2055176-A1 (CA)
Inventor: OHTSUKI KEIKO
IPC: H04M3/58
Filed: 1991-11-08
Abstract: A message service control system having a main exchange unit and a voice storing exchange unit, the voice storing exchange unit having a subscriber data registering unit for registering a transfer destination address designated in advance by a called subscriber and a message storing unit for storing the message, the message including a guideline to the calling subscriber for selecting to store a message from the calling subscriber or to be connected to the transfer destination address.
Patent CA-2055377-A1 (CA)
Title: Long span post-tensioned steel/concrete truss and method of making same
Inventor: YEE ALFRED A
IPC: E01D101/28
Filed: 1991-11-13
Abstract: ABSTRACT OF THE DISCLOSURE         A long span truss of substantially conventional steel construction provided with concrete encasement of the top and bottom chords with the concrete encasement being reinforced and the concrete encasement on the bottom chord and optionally on the top cord including post-tensioned steel tendons.  The invention further relates to a method of making the truss as described above in which the light structural steel truss is first erected and provided with temporary steel  scaffolding and bracing to support  formwork.          Reinforcing steel and steel tendons are placed in the formwork and concrete is poured to encase the top and bottom chords of the truss.  The steel tendons are post-tensioned to provide maximum load support capability.  The truss of the present invention can be used in situation where trusses are used to carry heavy loads over long spans such as bridges, stadiums, convention halls and the like and is especially beneficial when spanning a busy highway or waterway with the trusses including a single span or continuous trusses of two or more spans in which one or more intermediate supports are employed.
Patent CA-2057803-A1 (CA)
Inventor: LEFEBVRE REMY
IPC: F04B43/00
Filed: 1991-12-17
Abstract: D E D I V U L G A T I O N Dans une pompe à membrane à commande hydraulique pour pressions élevées, la membrane située entre la chambre hydraulique de commande et la chambre de travail est composite et comprend, entre deux membranes métalliques minces, une membrane intermédiaire épaisse en matière synthétique, de résistance élevée à l'écrasement et en forme de voûte déformable élastiquement dont le côté concave est tourné vers la chambre de travail Figure unique.
Patent CA-2058106-A1 (CA)
Title: Method of recovering speech path of pre-engaged call on restarting keyphone exchange system
IPC: H04M3/22
Filed: 1991-12-19
Abstract: A method of recovering a speech path of a pre-engaged call on restarting a keyphone exchange system from occurrence of a system failure.  The method includes the steps of initializing all hardware and all software except for a subscriber's table buffer of  said  keyphone  exchange  system  when  being  generated  a predetermined restarting signal of said system; initializing a variable number of port in the communication control software as a given initial value; generating an address of a port number corresponding  to  said  variable  number  of  port  in  said subscriber's table buffer; checking whether a talk bit of a line status word in a port corresponding to said port number is set or not, said line status word indicating state of said port; obtaining a subscriber's port number from a line number buffer and a opposite subscriber's port number from an opposite party if said talk bit is set, said line number buffer storing said subscriber's port number and said opposite party storing said opposite subscriber's port number; and forming said speech path of said call by connecting said subscriber's port number in said line number with said opposite subscriber's port number in said opposite party.
Patent CA-2058735-A1 (CA)
Inventor: SKEELS GARY W
IPC: C10G35/095
Filed: 1992-01-03
Abstract: "ACTIVATED ZEOLITE BETA CATALYST AND ISOMERIZATION PROCESS THEREFOR"                              ABSTRACT       Normal paraffin hydrocarbons are isomerized to produce products containing non-normal hydrocarbons using a novel zeolite beta catalyst that has been activated in order to enhance its catalytic properties by treating at an activation temperature effective to substantially reduce the concentration of strong acid species, i.e., hydronium cations, without substantially reducing theconcentration of weak acid species, i.e., hydroxoaluminum cations, both of said strong acid species and weak acid species being initially present on the catalyst prior to activation. The isomerization step is preferably thereafter conducted at a temperature at least 300°C lower than the activation temperature.
Patent CA-2060341-A1 (CA)
Title: Predictive coding device capable of coding image data signals without a discontinuity among blocks
Inventor: OHTA MUTSUMI
IPC: H04N19/134
Filed: 1992-01-30
Abstract: In a predictive coding device responding to a sequence of image data signals representative of picture elements to produce a sequence of coded output signals, a plurality of provisional error signals are calculated for each picture element from the image data signals and different provisional prediction signals sent from predictors and are given weights in multipliers from a weight decision circuit in consideration of a position of each picture element to produce weighted error signals.          The weighted error signals are summed up into a first sum signal by a first adder circuit and thereafter processed into the coded output signals and local decoded signals which are sent to the predictors.  The predictors may carry out either different prediction from one another for each picture element or identical prediction in relation to different blocks.  Alternatively, a motion vector which is calculated for each block may be smoothed in consideration of the other motion vectors calculated for adjacent blocks on motion-compensated prediction.          Thus, weighted means values are calculated as the weighted error signals and/or smoothed motion vector at every picture element so as to mitigate a discontinuity among the blocks.
Patent CA-2062145-A1 (CA)
Title: Self-fluxing binder composition for use in the pelletization of ore concentrates
Inventor: PANIGRAPHY SARAT
IPC: C22B1/244
Filed: 1992-03-02
Abstract: ABSTRACT OF THE DISCLOSURE           A self-fluxing binder composition for use in the pelletization of an ore concentrate,  especially iron ore concentrates. The composition comprises from 50 to 98% by weight of one or more carrier having a high surface area, and from 2 to 50% by weight of a water soluble organic enhancer. The carrier is selected from the group consisting of natural and synthetic magnesium and/or calcium bearing minerals and preferably consists of synthetic, fibrous-like forsterite. The enhancer is selected amongst the natural polysaccharides,  of  high viscosity,  and more preferably amongst the natural gums of high viscosity such  as the guar or xanthan gum and amongst starch and is derivatives. The use of such a self-fluxing binder composition improves the properties of the green and dry pellets and makes them more easy to handle, as compared to those produced with other conventional  binders.  Moreover,  the  pellets  that  are produced  with  such  a  binder  composition  have  improved metallurgical properties.
Patent CA-2063104-A1 (CA)
Title: Icebreaking ship
Inventor: HARJULA ARJO
IPC: B63B35/08
Filed: 1992-03-16
Abstract: An icebreaking snip has a hull including a forward part and an aft part and a screw arrangement in the aft part of the ship. The screw arrangement is designed for propulsion of the ship in the forward direction and is turnable substantially in a horizontal plane, whereby the screw arrangement serves for steering the ship.      The screw arrangement and the form of the hull of the ship are dimensioned and designed for allowing the ship to move in the aft direction in heavy ice conditions.
Patent CA-2064173-A1 (CA)
Title: Process for the preparation of rubber-containing graft copolymer particles
Inventor: MATSUMOTO KOJI
IPC: C08L101/00
Filed: 1992-03-26
Abstract: PROCESS FOR THE PREPARATION OF RUBBER-CONTAINING           GRAFT COPOLYMER PARTICLES     ABSTRACT OF THE DISCLOSURE      Rubber-containing graft copolymer particles excellent in powder properties are prepared by a process comprising mixing, with 100 parts by weight (as solid content) of rubber-containing graft copolymer (A) in a state of slurry, 0.1 to 10 parts by weight of a rigid non-elastic multi-stage polymer (B), in a state of slurry, consisting of 30 to 80% by weight of a (co)polymer component comprising 40 to 100% by weight of methyl methacrylate and 0 to 60% by weight of one or more other monomers copolymerizable therewith being polymerized at least in the first stage and 5 to 70% by weight of a (co)polymer component comprising 70 to 100% by weight of methyl methacrylate and 0 to 30% by weight of one or more other monomers copolymerizable therewith being polymerized in the final stage, the total amount of the (co)polymer components in the respective stages being 100% by weight and the content of polymeric units derived from an acrylic ester in the multi-stage polymer (B) being from 5 to 30% by weight.