baber/WOPTO huggingface dataset:
Patent CA-1320955-C (CA)
Title: Preparation of primary aralkyl urethanes and ureas and isocyanates derived therefrom
Inventor: SINGH BALWANT
IPC: C07C263/00
Filed: 1987-10-30
Granted: 1993-08-03
Abstract: 29,774 PREPARATION OF PRIMARY ARALKYL     URETHANES AND UREAS AND ISOCYANATES DERIVED THEREFROM           ABSTRACT A process is disclosed for the preparation of aralkyl mono-and diurethanes or ureas by carbamylmethylation, or acid-catalyzed addition at a temperature of 40°C to about 100°C of formaldehyde and esters of carbamic acid to aromatic hydrocarbons.  Aralkyl carbamates and ureas formed by this process can be cracked directly to produce aralkyl diiso-cyanates, or hydrogenated and then cracked to produce ali-phatic diisocyanates, or reacted directly with polyols to produce polyurethanes by functioning as blocked isocyanates.
Patent CA-1300301-C (CA)
Inventor: WILLIS CARL L
IPC: C08F8/00
Filed: 1987-12-03
Granted: 1992-05-05
Abstract: A B S T R A C T                  BLOCK COPOLYMER GRAFTING PROCESS    Process for the preparation of an elastomeric polymer containing a functional group by a) contacting an elastomeric polymer comprising an active group containing an alkali metal atom with a steric hindering compound, b) reacting the product from (a) with CO2 or a silanol, and c) recovering an elastomeric polymer containing a carboxyl or silanol group.            T2.K4668
Patent CA-1282675-C (CA)
Title: Poly(arylene sulfide ketone) composites
Inventor: GEIBEL JON F
IPC: C08L81/02
Filed: 1988-01-04
Granted: 1991-04-09
Abstract: Poly(Arylene Sulfide Ketone) ABSTRACT A process  to  form a fiber-reinforced composite having a continuous thermoplastic matrix of poly(arylene sulfide ketone) resins is provided.  The composite is useful to form shaped articles with high temperature resistance.  The composite can be prepared by consolidating under heating a multi-layer stack of resin sheets and fiber reinforcement sheets.  The poly(arylene sulfide ketone) resins can be melt-stabilized through treatment with a water-soluble salt of an alkaline earth metal. The composite has excellent thermal properties such as heat distortion temperature.
Patent CA-1280468-C (CA)
Title: Radio data transmission system
Inventor: NAKAMURA NOBUHIRO
IPC: H04B7/08
Filed: 1988-02-15
Granted: 1991-02-19
Abstract: ABSTRACT OF THE DISCLOSURE    A radio data transmission system wherein signals received via a plurality of diversity antennas are switched at a cycle of subtime slot so that, when the reception level of at least one antenna is sufficiently high to receive the required signal in the relevant time slot, the digital signal in that time slot can be detected properly even if the reception level of any other antenna is not sufficiently high.  Accordingly, the code error rate can be minimized by constituting the system in such a manner that the correlation of variations in the reception levels of the diversity antennas becomes extremely low.
Patent CA-1305118-C (CA)
Title: Cassette winding apparatus and method for operating
Inventor: PEREGO LUCIANO
IPC: G11B23/113
Filed: 1988-02-18
Granted: 1992-07-14
Abstract: PATENT     Abstract of the Disclosure A cassette winding machine includes a tape winding unit for winding a predetermined length of tape from either a first supply reel or a second supply reel into a cassette.          The first and second supply reels are rotatably mounted on hubs on the machine.  A tape support holds the tape from the first supply reel as well as the tape from the second supply reel.  The tape support is located on the supply reel side of the cassette winding machine between the supply reels and the tape winding unit.  The cassette winding machine also includes a tape threading assembly that has a gripper device.  The gripper device selectively grips and releases tape from either the first supply reel or the second supply reel.  The tape gripper device grasps a selected one of the first and second tapes at a point near the tape support.          Subsequently, the tape threading assembly moves the gripper device, which is holding the free end of the selected tape, from the supply reel side of the cassette winding machine to the opposite side of the cassette winding machine beyond the tape winding unit.  Hence, the tape threading assembly moves the selected tape from one side of the cassette winding machine to the other side and places the selected tape across the tape winding unit.  The tape winding unit may then utilize the selected tape for tape winding operations.          Preferably, the tape threading assembly moves the gripper device in a substantially straight line between its initial PATENT     threading position and its final threading position without encountering any guide rollers or other components.            SMA98.13:rc
Patent CA-1304741-C (CA)
Title: Heterocyclic compounds
Inventor: BOYLE FRANCIS T
IPC: C07D233/64
Filed: 1988-03-03
Granted: 1992-07-07
Abstract: A B S T R A C T           A heterocyclic compound of the formula I, as shown hereafter in these claims in which n is 0 or 1; A is a 1-4C alkylene radical which may optionally bear one or more 1-4C alkyl substituents; R1 and R2, which may be the same or different, are each a hydrogen or halogen atom; an amino, carbamoyl, cyano, hydroxy, nitro or sulphamoyl radical, a 1-6C alkyl, halogenoalkyl, alkoxy, halogenoalkoxy, alkylamino, alkylcarbamoyl or alkylsulphamoyl radical, a di(1-6C alkyl)-amino, di(1-6C alkyl)carbamoyl or di(1-6C alkyl)sulphamoyl radical, or a 2-7C alkoxycarbonyl radical  m is an integer of 1 to 5, R3 is a hydrogen or halogen atom or a 1-6C alkyl or halogenoalkyl radical; and R4 is a 5-membered aromatic ring heterocyclyl radical containing 2 or 3 nitrogen atoms, or a 6-membered aromatic ring heterocyclyl radical containing 1 or 2 nitrogen atoms, which heterocyclyl radical may bear a 1-6C alkyl substituent; and for those compounds which contain a basic nitrogen atom, the pharmaceuticaIly acceptable acid addition salts thereof together with processes of manufacture and pharmaceutical and veterinary compositions thereof.
Patent CA-1294549-C (CA)
Title: Prevention of contact allergy by coadministration of a corticosteroid with a sensitizing drug
Inventor: AMKRAUT ALFRED
IPC: A61K31/57
Filed: 1988-03-08
Granted: 1992-01-21
Abstract: PREVENTION OF CONTACT ALLERGY BY COADMINISTRATION OF       A CORTICOSTEROID WITH A SENSITIZING DRUG                     ABSTRACT OF THE DISCLOSURE A   method   of  preventing  sensitization   in   transdermal drug delivery by the inclusion of a corticosteroid, which will be co-extensively coadministered with the sensitizing agent.
Patent CA-1306945-C (CA)
Title: Pharmaceutical compositions in the form of stable sucralfate suspensions free of suspending agents
Inventor: ZAGNOLI GIORGIO
IPC: A61K31/70
Filed: 1988-04-14
Granted: 1992-09-01
Abstract: ABSTRACT            Pharmaceutical compositions in the form of stable sucralfate suspen-sions free of suspending agents, wherein the sucralfate is present in the form of a gel having self-suspending properties and is suspen-ded in an aqueous carbohydrate solution in a quantity of between 1 and 40% of sucralfate by weight.          Said gel has a surface area exceeding 200 m2/g and is prepared by dissolving powdered sucralfate in an HCl solution and then precipi-tating it with an NaOH solution added to a pH of between 4 and 4.5.
Patent CA-1311610-C (CA)
Inventor: VATERLAUS ARTHUR
IPC: B22D41/08
Filed: 1988-05-10
Granted: 1992-12-22
Abstract: OUTLET AND FLOW CONTROL DEVICE FOR METALLURGICAL VESSELS AND CASTING PROCESS                        ABSTRACT         A stopper (6), secured to the lower end of a stopper rod, carries a plug (13) having a radial throttle aperture (14) above which a frustoconical shut-off surface (16) is located in the said plug.         A further seal is provided by the annular surface of the plug (13) engaging in the outlet passage.         The stopper (6) may be rotated whereby the direction of flow of the emerging molten metal can be influenced.         This provides flow control and considerable resistance to wear.  Moreover, the formation of vortices in the molten metal is largely prevented, thus avoiding the carrying along of slag.
Patent CA-1297753-C (CA)
Title: Venous return catheter
Inventor: LINDSAY ERIN J
IPC: A61M25/00
Filed: 1988-06-02
Granted: 1992-03-24
Abstract: ABSTRACT OF THE DISCLOSURE          A kink-resistant, dual-drainage, venous return catheter preferably completely comprised of a polyvinyl chloride material and molded in a conventional injection molding process.  This catheter comprises a smaller portion dimensioned to be received in a vena cava, a larger portion and a transition portion between the two other portions. In one embodiment, the transition portion comprises means for stinting the larger portion so that it can't enter the vena cava, a plurality of inlet openings and a plurality of reinforcing channels connecting the inlet openings to the larger portion so that fluid entering the inlet openings is channeled into the larger portion.  All of these openings are preferably peripherally chamfered on the inside generally away from the smaller catheter portion and on the outside generally towards and away from the smaller catheter portion.
Patent CA-1291196-C (CA)
Title: Open water heater
Inventor: KURZ ROLF
IPC: F24H1/18
Filed: 1988-08-10
Granted: 1991-10-22
Abstract: ABSTRACT OF THE DISCLOSURE     A hot water heater includes a water tank defining a tank space for accommodating water; a cold water inlet and a hot water outlet connected to the tank; a hot water tap in the hot water outlet for controlling flow of hot water from the water tank; a cold water valve in the cold water inlet for controlling flow of cold water into the water tank; and a volume altering device for changing the tank space.  The volume altering device comprises an expandable and collap-sible chamber situated in the tank space and defining a chamber space hermetically separated from the tank space; and a volume varying arrangement connected to the chamber and exposed to pressure of inflowing cold water for increasing the chamber space by a predetermined volume while correspond-ingly reducing the tank space when the hot water tap and the cold water valve are open and for reducing the chamber space by the predetermined volume while correspondingly increasing the tank space subsequent to closing the hot water tap and the cold water valve to obtain a water-free space having the predetermined volume and forming part of the tank space.
Patent CA-1296552-C (CA)
Title: Method of explosion welding alloy aluminium
Inventor: PERSSON INGEMAR
IPC: B23K20/227
Filed: 1988-09-22
Granted: 1992-03-03
Abstract: ABSTRACT            A method of explosion welding magnesium-alloyed aluminium to high strength material. The invention is characterized in that the magnesium-alloyed aluminium material comprises base material (4) and that the base material is clad or coated with a thin cladding plate (3) consisting of the afore men-tioned high strength material, in that an explosive charge (1) is caused to accelerate a drive plate (2) made of a high density material, preferably steel, which in turn is arran-ged to accelerate the cladding material (3) towards the base material (4), where the amplitude of the pressure generated between the cladding material and the base material is caused to take a value which is so low that the temperature in the whole of the joint surface, or substantially the whole of the joint surface, is below the boiling point of the alloying substances of the aluminium material, while bringing, at the same time, the amplitude or duration of this pressure to such a high level as to produce an impulse which is sufficient to cause the materials to weld to one another, and in that the free surface of the high-strength cladding material (3) is explosion welded in a later stage, to a base material (6) consisting of steel, or some other high strength metal.            Figures 1 and 2 for publication.
Patent CA-1321117-C (CA)
Title: Pressure generation and responsive mechanism
Inventor: ASANO HIROAKI
IPC: F15B15/18
Filed: 1988-09-26
Granted: 1993-08-10
Abstract: ABSTRACT OF THE DISCLOSURE A pressure generation and responsive mechanism is provided wherein several blade members bodily movable with a first member is received within a space formed in a second member. The second member provides a first flat end  surface in friction engagement with the blade members, and an actuation piston, by itself or in cooperation with the second member, provides a second flat end surface in friction engagement with the other ends of the blade members.  Silicon oil is filled within several space sections defined by the first and second flat end surfaces and the blade members.  When the first member is moved relative to the second member, the blade members compulsorily displaces the silicon oil within the several space sections against friction resistance with the first and second flat end surfaces.  Thus, a pressure is generated within each of the several space sections to actuate the actuation piston.
Patent CA-1336157-C (CA)
Title: Die-less drawing method and apparatus
Inventor: BORODIN DANIEL J
IPC: C21D1/20
Filed: 1988-10-04
Granted: 1995-07-04
Abstract: Method and apparatus for heating, cooling and stretching a metal specimen as it is being elongated, according to a temperature curve selected to provide a finished product having a predetermined microstructure, ultimate tensile strength, yield point and cross-section.
Patent CA-1333258-C (CA)
Inventor: ILLUM LISBETH
IPC: A61K9/16
Filed: 1988-10-11
Granted: 1994-11-29
Abstract: High molecular weight drugs such as peptides are not well absorbed across biological membranes such as the nasal mucosa.  Absorption can be increased if the drug is given together with an absorption enhancing material. However, it has been found that such material can have an irritant effect on the membrane.  The invention provides a drug delivery composition for transmucosal delivery comprising a plurality of microspheres and active drug associated with  each microsphere,  the  drug being  for  systemic delivery and having a maximum molecular weight of 6000 and  the  composition being  substantially  free  of an enhancer.   The microspheres may be starch,  gelatin, collagen or dextran.  The composition has been found to increase the absorption of drugs, particularly peptides such  as  insulin,  across  mucosal  membranes.     The compositions are suitable for delivery across mucosal surfaces such as the nose, vagina or eye.
Patent CA-1331750-C (CA)
Inventor: KIKUCHI KAZUTO
IPC: F04C29/02
Filed: 1988-11-18
Granted: 1994-08-30
Abstract: SCROLL TYPE COMPRESSOR          ABSTRACT OF THE DISCLOSURE       This invention discloses a lubricating mechanism of a hermeti-cally sealed scroll type compressor in which an inner chamber of a housing is kept at suction pressure. The compressor includes a drive shaft supported by a first plain bearing in an inner block member. The drive shaft is operatively linked to an orbiting scroll which orbits within a stationary scroll. A rotation preventing device prevents rotation of the orbiting scroll. The drive shaft includes an axial bore extending from an open end and terminating within the inner block member. A pin extends from the end of the drive shaft to the orbital scroll and is supported in a bushing within an extension of the orbiting scroll. A second plain bearing supports the bushing. A passage links the axial bore to an opening at the end of the pin facing the orbital scroll. A radial bore is provided near the terminal end of the axial bore to link the axial bore to a suction chamber of the compressor. A first helical groove is formed in the exterior surface of the supported portion of the drive shaft. The first helical groove is linked to the axial bore through a radial hole formed through the supported portion of the drive shaft. A second helical groove is formed in the exterior surface of the bushing. Fluid flows through the radial bore and through the narrow passage to lubricate the rotation preventing device. Fluid flows through the first helical groove to lubricate the friction surface between the drive shaft and the first plain bearing. Fluid flow through the second helical groove to lubricate the surface between the bushing and the second plain bearing.
Patent CA-1337916-C (CA)
Inventor: HASEGAWA AKIRA
IPC: C07K9/00
Filed: 1988-11-21
Granted: 1996-01-09
Abstract: Muramyl peptide derivatives having the formula (I) (I)   wherein R3 is a long chain acyloxyacyl group, R1 is hydrogen or hydroxy mercapto, acyloxy or acylthio group, R2 is hydrogen or alkyl group and R4 is acyl, which are useful as immuno-modulators.
Patent CA-1317231-C (CA)
Title: Process for the production of a catalytic converter for exhaust-gas cleaning and catalytic converter produced according to this
Inventor: HAERLE HANS A
IPC: B01J35/04
Filed: 1988-12-21
Granted: 1993-05-04
Abstract: A B S T R A C T     Process for the Production of a Catalytic Converter for Exhaust-Gas Cleaning and Catalytic Converter Pro-duced according to this In a process for the production of a catalytic converter for the cleaning of exhaust gases of internal-combustion engines by means of a catalytic converter body through which flow the exhaust gases, the catalytic converter body (10) is compression-molded from metal wire pieces or metal chips and sintered after molding.
Patent CA-1291275-C (CA)
Inventor: FRANTZ ROBERT H
IPC: H01R12/72
Filed: 1989-02-13
Granted: 1991-10-22
Abstract: ABSTRACT     A boardlock (52) is adapted to secure a connector (10) to a printed circuit board (26).  The body portion (54) of the boardlock (52) is disposed in a recess (34) in the connector housing (12) flange (28) in an interference fit.  First (64) and second (66) pairs of legs depend from the body portion (54) and extend to respective free ends (68; 70).  Each of the legs (64; 66) has a diverging section (72; 74) intermediate the body means (54) and the free ends (68; 70) and a converging section (76; 78) intermediate the diverging section (72; 74) and the free end (68, 70).  The diverging (72; 74) and converging (76; 78) sections diverge and converge, respectively, with respect to the axis (58) of the boardlock (52) in the direction from the body portion (54) to the free ends (68; 70).  The diverging sections (72; 74) of the first and second (64; 66) pairs of legs overlap in axial range thereby extending the thickness of the printed circuit board (26) that can be accommodated.
Patent CA-1323615-C (CA)
Inventor: GROENER ALOIS
IPC: B65D30/12
Filed: 1989-02-23
Granted: 1993-10-26
Abstract: Abstract of The Disclosure A foldable bag material is formed into a bag having at least one end with a corner and having an end closure formed by the bag material which closes off the one end of the bag. A filter valve tube extends within the end closure at the one corner, the tube having an inner end disposed within the inter-ior of the bag such that the tube is adapted to receive a filler nozzle of a pneumatic filling device for filling the bag with a filling material.  The tube has an inner end portion and an outer end portion, the inner end portion having a cross-sectional contraction which is contracted relative to the outer end por-tion such that the contracted inner end portion forms a seal with the filler nozzle, the tube being made at least partially of a filter material which is gas-permeable but which retains the filling material such that the gas-permeable material pro-vides for venting of the bag during filling.
Patent CA-1329559-C (CA)
Title: Leukocyte separator and method of making the same
Inventor: NAOI KEIJI
IPC: B01D71/54
Filed: 1989-02-27
Granted: 1994-05-17
Abstract: ABSTRACT OF THE DISCLOSURE        A leukocyte separator for trapping and separat-ing leukocytes from blood is made of a porous material hav-ing a bubble point ranging from 0.08 to 0.3 kg/cm2 and a thickness of at least 0.30 mm.  The leukocyte separator is manufactured by pressing a porous material having a bubble point smaller than 0.13 kg/cm2 to produce a porous material having a thickness of at least 0.3 mm and a bubble point ranging from 0.13 to 0.3 kg/cm2.
Patent CA-1322204-C (CA)
Title: Agrafe d'epinglage a mecanisme interieur
Inventor: DUFFAUD JACQUES
IPC: B21J15/42
Filed: 1989-03-31
Granted: 1993-09-14
Abstract: Agrafe destinée à l'épinglage d'un ensemble de tôles. L'agrafe comporte un corps creux déterminant une face d'appui, destinée à venir au contact de la face extérieure d'une des tôles externes de l'ensemble de tôles. Au moins une lame élastique est destinée à traverser des trous en regard pratiqués dans les tôles de l'ensemble et pourvu d'un bec d'accrochage. Selon l'invention, cette agrafe est pourvue d'un mécanisme comportant un premier noyau pouvant tourner et coulisser à l'intérieur du corps creux, et pourvu d'un filetage avec lequel coopère un second noyau fileté, duquel la lame élastique est solidaire.
Patent CA-1312357-C (CA)
Inventor: LAURENT PIERRE A
IPC: G10L11/02
Filed: 1989-05-03
Granted: 1993-01-05
Abstract: The method disclosed comprises the steps of: cutting up the signal into frames, sampling each frame to obtain a digital signal comprising a determined number n of samples, pre-emphasizing the digital signal, filtering the pre-emphasized digital signal by means of a high-pass digital filter to obtain a filtered digital signal, measuring, in each frame, the maximum energy of the pre-emphasized signal and the maximum energy of the filtered digital signal, to achieve an energy ratio R between the maximum energy of the filtered digital signal and the maximum energy of the pre-emphasized digital signal. The method also comprises the steps of computing, between two limits, the mean long-term values of the maximum value of the energy of the filtered signal and of the energy ratio and of computing, on the basis of the mean long-term values, four threshold values, two of them being maximum values, forming two lower limits of the speech state for the filtered signal and the energy ratio respectively, and two of them being minimum signals, forming two upper limits of the noise state for the filtered signal and the energy ratio respectively, to compare, with these threshold values, the maximum energy of the filtered signal and the energy ratio, to decide on the presence of the vocal signal in the noise-infested signal when the maximum energy of the filtered digital signal, or the energy ratio, is respectively greater than their maximum threshold values.
Patent CA-1322013-C (CA)
Inventor: MITCHELL GEORGE W
IPC: B62D13/06
Filed: 1989-05-11
Granted: 1993-09-07
Abstract: ABSTRACT OF THE INVENTION                MULTIPLE AXLE TRAILER          A multiple axle trailer comprises a chassis pivotally connected to turn substantially horizontally with respect to a sub-chassis and provided with means at its forward end to enable the trailer to be hitched to a towing vehicle, the sub-chassis carrying forward and rear pairs of wheels. An adjustable length steering arm is pivotally connected to the sub-chassis and to the chassis forward of the connection to the sub-chassis. A system of linkages connects the forward wheel king pins with a mounting point which is rotationally fixed with respect to the steering arm and operates to turn the forward wheels from the steering arm so that the trailer tracks the towing vehicle. In a preferred embodiment the mounting point is moveable longitudinally to enable the forward wheels to be moved in the opposite direction during reversing of the trailer.