baber/WOPTO huggingface dataset:
Patent CA-2150850-A1 (CA)
Title: Interference cancellation system employing a polar vector modulator
Inventor: TALWAR ASHOK K
IPC: H04B1/12
Filed: 1995-06-05
Abstract: An interference cancellation system employing a polar vector modulator obtains a reference signal and a received signal.  The received signal has a desired signal component and an interfering signal component.  The reference and received signals as well as an auxiliary signal of known frequency and amplitude, are provided to a signal correlator circuit which compares and correlates the reference and received signals and generates an adjusted auxiliary signal which corresponds to the auxiliary signal adjusted in phase and amplitude.  A phase detector detects the difference in phase between the auxiliary signal and the adjusted auxiliary signal and generates a phase control signal in response.  Likewise, an amplitude detector measures the amplitude of the adjusted auxiliary signal and generates an amplitude control signal in response.  The phase and amplitude control signals and the reference signal are provided to a polar vector modulator having a 360° variable phase shifter and a variable attenuator coupled together in series, each of which has a low or negligible insertion loss.  The reference signal is amplitude and phase adjusted by the polar vector modulator to have substantially the same amplitude and to be 180° out of phase with the interfering signal component of the received signal.  The amplitude and phase adjusted reference signal is then summed with the received signal so that substantially only the desired signal component of the received signal remains.
Patent CA-2151908-A1 (CA)
Title: Safety mechanism for power tool
Inventor: KUPLAS HARBEY
IPC: B27B17/08
Filed: 1993-12-17
Abstract: An actuating mechanism for a power operated tool such as a chainsaw includes one or more manually operable members (34, 62, 90) which are mounted on the housing (30) of the tool. A braking mechanism (37, 38) is associated with the drive means of the tool and the braking mechanism normally applies a braking action to the drive means. The manually operable members (34, 62, 90) are operatively coupled to the braking mechanism (37, 38) by a plurality of balls (52) disposed in a passage in such a way that movement of each manually operable member results in a given movement of the balls (52). When a predetermined number of members have been operated the braking action is released.
Patent CA-2153100-A1 (CA)
Title: Snowmobile reduction drive
Inventor: RIOUX ROGER
IPC: B62M27/02
Filed: 1995-06-30
Abstract: This invention relates to an improved snowmobile drive train configuration arrangement that incorporates a fixed ratio speed reduction mechanism directly coupled to the engine crankshaft. This mechanism is in turn coupled to the driving pulley of a variable ratio belt drive system the driven pulley of which is mounted on the axle of the sprocket wheels that drive the snowmobile track. Interposing the reduction drive between the engine and the belt drive system reduces the operational speed of both the pulleys and the belt which proves beneficial from several aspects, the mechanical efficiency of the global system is increased the dynamic response of the transmission to throttle modulation is improved; aerodynamic losses are reduced; the bending vibrations of the crankshaft are no longer transmitted to the drive clutch; and the engine can be run at higher RPM without decreasing the efficiency of the belt drive system.
Patent CA-2153562-A1 (CA)
Title: Mounting assembly for supporting a safety device
Inventor: BAZIUK MORRIS
IPC: B66C23/20
Filed: 1995-07-10
Abstract: The present invention provides an apparatus for mounting an appliance at an opening in a wall, particularly for use with openings in the exterior walls of storage tanks and the like. The apparatus allows men and materials to be safely raised and lowered within the opening, can be moved away from the opening without completely removing the apparatus from the tank, and can be used to mount a variety or different appliances for use through the opening. The apparatus comprises grasping means for securing the apparatus to the opening of the wall, an appliance mounting member for connecting an appliance to the grasping means, and an appliance for maneuvering through the opening and performing a predetermined task within the tank.
Patent CA-2154227-A1 (CA)
Inventor: ASZODI JOZSEF
IPC: A61P31/04
Filed: 1995-07-18
Abstract: L'invention a pour objet les produits de formule générale (I) : <IMG> (I) isomère syn, dans laquelle R1, R2, R3 et R5 représentent un atome d'hydrogène ou d'halogène ou un radical hydroxy, alkyl, alkyloxy, mercapto, alkylthio, nitro, cyano, amino, alkylamino, dialkylamino, carbamoyle, (alkylamino) carbonyle, (dialkylamino) carbonyle, carboxy, alcoxycarbonyle, acyloxy, amino ou alkylaminosulfonyle; R4 représente un radical hydroxy ou acyloxy; R7 représente un radical alkyle, hydroxy, alkyloxy ou phényl; R8 représente un radical hydroxy ou alkyloxy; ou R7 et R8 représentent ensemble un radical alkylène dioxy; A représente un atome d'hydrogène, un équivalent de métal alcalin, alcalino-terreux, de magnésium, d'ammonium ou d'une base organique aminée, ou bien CO2A représente CO2?, et -CH2R6 peut être en position E Ou Z. Ces produits possèdent d'intéressantes propriétés pharmacologiques qui justifient leur emploi comme antibiotiques.
Patent CA-2154598-A1 (CA)
Title: Removal of water vapour from acidgas streams
Inventor: DALLA LANA IVO G
IPC: C01B17/04
Filed: 1995-07-25
Abstract: The invention disclosed relates to an improved process for the production of elemental sulfur from acidgas streams containing hydrogen sulfide,  in which the hydrogen sulfide conversion is improved by removing by product water vapor by dehydration by direct contact of the hydrogen sulfide with concentrate sulfuric acid in a concentration range of about 82 to about 96 wt%.
Patent CA-2157468-A1 (CA)
Title: Superabsorbent polymer foam
Inventor: PHAN DEAN VAN
IPC: A61F13/53
Filed: 1994-03-18
Abstract: An improved superabsorbent polymer foam having a morphology to provide improved absorptive properties is disclosed. The foam preferably comprises a superabsorbent polymer formed from a substantially water-soluble, unsaturated monomer having neutralized carboxyl groups and a substantially water-soluble internal crosslinking agent. The monomer and crosslinking agent are expanded in the presence of a substantially water-insoluble blowing agent and a suitable solvent and reacted to form a superabsorbent polymer foam having substantially continuous, intercommunicating channels substantially throughout the foam and a relatively high surface area to mass ratio. Methods for making the foam and absorbent products, members and articles containing the foam are also disclosed.
Patent CA-2158413-A1 (CA)
Title: Crosslinking agents for textile printing fixing agents
Inventor: REIFF HELMUT
IPC: C08G18/08
Filed: 1995-09-15
Abstract: The present invention relates to a method for textile printing with aqueous dispersions in which an organic fixing agent is crosslinked with a blocked poly-isocyanate having (i) an average molecular weight of about 800 to about 25,000, (ii) a content of blocked isocyanate groups, calculated as free NCO and based onnon-blocked polyisocyanate, corresponding to an NCO content of about 5 to about 20% by weight, (iii) an ionic group content of about 1 to about 75 milliequivalents per 100 g of blocked polyisocyanate, and (iv) a content of polyalkylene oxide units of about 1 to about 20% by weight, based on blocked polyisocyanate, said blocked polyisocyanate being obtained by the reaction of (a) organic polyisocyanates, (b) isocyanate-reactive compounds containing (potential) ionic groups, (c) polyalkylene ether alcohols, (d) NCO blocking agents, and (e) optionally, isocyanate-reactive compounds that are different from components (b), (c), and (d).
Patent CA-2159711-A1 (CA)
Title: Lignin-based formulations for wood composites
Inventor: ASH JACOB
IPC: C08L97/00
Filed: 1994-04-08
Abstract: Novel adhesives for wood composites are described. The adhesives comprise a novel combination of an organosolv lignin and a phenol-formaldehyde resin in a weight ratio of from about 0.5:99.5 to about 70:30 based on phenolic solids in said phenol-formaldehyde resin. The adhesives further comprise a modifier which improves the performance of the adhesive. Adhesives comprising an organosolv lignin and a liquid phenol-formaldehyde resin are also described. The organosolv lignin solution is comprised in either an alkaline solution or in a dispersion. Adhesives wherein the organosolv lignin is phenolated or methylolated prior to incorporation with the phenol-formaldehyde resin are also described. Wood composites such as plywood, waferboard, oriented strandboard, particleboard, wallboard and molded products were manufactured using the adhesives of the invention. Results of board testing demonstrate that the wood composites of the invention are competitive with wood composites manufactured using commercial adhesives.
Patent CA-2159901-A1 (CA)
Title: Chemical reactor, refrigerating machine and container provided therewith, and reagent cartridge therefor
Inventor: LABRANQUE GILLES
IPC: F25B17/08
Filed: 1994-04-05
Abstract: PCT No. PCT/FR94/00377 Sec. 371 Date Oct. 5, 1995 Sec. 102(e) Date Oct. 6, 1995 PCT Filed Apr. 5, 1994 PCT Pub. No. WO94/23253 PCT Pub. Date Oct. 13, 1994A reagent (26) combines exothermically with a cold refrigerating fluid exiting a refrigerating evaporator during a refrigeration cycle, then releases the refrigerating fluid endothermically once it has been heated to a sufficiently high temperature by means of a heating element (17) during a regeneration cycle during which the released refrigerating fluid condenses in a pressurized tank. The reagent is confined inside stainless steel walls (29, 31, 34) which prevent it from swelling. These walls include perforated tubes (34) lining channels (32) in which the mass exchanges take place during the combining and separating reactions. The heating element (17) is fitted in a central cavity (46). An air flow (54), which is interrupted during regeneration, evacuates the heat of the combining reaction by means of fins (56). The invention prevents the block of reagent from distorting and becoming progressively inoperative over repeated cycles.
Patent CA-2160610-A1 (CA)
Title: Emergency vent valve
Inventor: GAYFER ROBERT
IPC: B60T15/42
Filed: 1995-10-16
Abstract: An emergency vent valve including a piston responsive to the differential pressure between the brake pipe and a control volume to open a vent valve to vent the brake pipe to atmosphere and includes an exhaust valve responsive to the differential pressure between brake pipe and control volume to connect the control volume to atmosphere through a service check and when the vent valve is opened through a second blow-down choke of a lesser rate which limits the exhausting of the control chamber. A choke valve connected to the piston connects the blow-down choke in series with the service choke when the vent valve becomes fully open.
Patent CA-2160922-A1 (CA)
Title: Hiv immunogenic complexes
Inventor: DE VICO ANTHONY LOUIS
IPC: G01N33/569
Filed: 1994-05-06
Abstract: A vaccine and a method of raising neutralizing antibodies against HIV infection.     The vaccine comprises a complex of gp120 covalently bonded to CD4 or to succinyl concanavalin A. Also disclosed are immunological tests using the complex or antibody thereto for detection of HIV infection.
Patent CA-2161486-A1 (CA)
Title: Press blanket and method for producing the same
Inventor: MATUSCHCZYK UWE
IPC: D21F3/00
Filed: 1995-10-26
Abstract: There are provided a press blanket for a pressing device intended for extracting liquid from a web passing through a press nip of a papermaking machine, and a device for producing such a press blanket. In addition to the reinforcing threads extending in the axial direction and circumferential threads arranged thereon and extending in the circumferential direction of the press blanket, the press blanket comprises a continuous fabric layer or a bandage extending in the area between the circumferen-tial threads and grooves or blind holes starting at the surface of the press blanket. The continuous fabric layer acts to prevent the propagation of fissures that may form in operation due to the high pressing forces, preferably at the bottom of the grooves as a consequence of the high notch stresses prevailing at these points. This significantly improves both the service life of the press blanket and the operating safety. The fabric tape may be spirally wound into the compound simultaneously with the production process, by pouring the elastomeric material onto a preferably cylindrical casting mold.
Patent CA-2166300-A1 (CA)
Title: Aqueous lubricant and surface conditioner for formed metal surfaces
Inventor: BERSHAS JAMES P
IPC: C10M173/02
Filed: 1994-01-04
Abstract: A lubricant and surface conditioner for formed metal surfaces, particularly aluminum and tin beverage containers, reduces the coefficient of static friction of said metal surfaces and enables drying said metal surfaces at a lower temperature. The conditioner includes (i) a water-soluble organic material selected from amine oxides and quaternary ammonium salts, ethoxylated castor oil derivatives, and imidazoline moiety-containing phosphonates and preferably also includes (ii) at least one of fluozirconate, fluohafnate, or fluotitanate ion, and (iii) phosphate and/or nitrate ions. Good resistance to damaging the friction reducing effect by overheating and to staining of the domes of treated containers during pasteurization can be achieved.
Patent CA-2168473-A1 (CA)
Title: Photochromic naphtho(2,1-b)pyrans
Inventor: RICKWOOD MARTIN
IPC: G03C1/73
Filed: 1994-08-11
Abstract: A naphthopyran compound of general formula (I) wherein R1 represents an alkyl group or an aryl group; each of R4 and R5, which may be the same or different, independently represents an alkyl, alkenyl, carbocyclic or heterocyclic group, or R4 and R5 taken together with the carbon atom to which they are attached form a carbocyclic ring or a heterocyclic ring; and R6 represents a hydrogen atom or a substituent selected from alkyl, alkoxy, aryl, aryloxy, heteroaryl, halogen, amino, substituted amino, azo, imino, amide, carboxylate, ester, cyano, trifluoromethyl or nitro, and in addition R6 may represent a carbocyclic or heterocyclic ring fused to ring A. The naphthopyran compounds of the invention are useful as photochromic materials in lenses, e.g. sunglasses, and photochromic transparencies for cars and aircrafts.
Patent CA-2171723-A1 (CA)
Title: Concrete remix and transfer device
Inventor: MAXON GLENWAY W III
IPC: B28C9/04
Filed: 1994-08-17
Abstract: A mobile concrete remix and transfer device includes an elongate open-topped surge bin (11), a remixing and transfer agitator (21) rotatably mounted in the bin to move concrete toward one end, and an upwardly inclined discharge screw conveyor (25) mounted in one end of the bin to transfer concrete therefrom to an upper discharge end near the upper edge of the surge bin. The device is particularly useful for direct or shuttle transfer hauling within the close confines of tunnel construction in a manner in which concrete can be loaded into and discharged from the bin at points directly adjacent the open upper edge thereof without the need for vertical lifting or tilting adjustment of the bin. The device may also be skid-mounted and positioned directly on the ground, loaded directly from a low discharge height truck mixer, and discharged directly into a concrete pump hopper, bucket, or the like.
Patent CA-2175327-A1 (CA)
Inventor: RAMIREZ DE AGUDELO MAGDALENA
IPC: C10G45/36
Filed: 1996-04-29
Abstract: A process for regenerating a spent hydrogenation catalyst, comprising the steps of providing a catalyst comprising a support material selected from the group consisting of an inorganic oxide-zeolite composite, carbon and zeolite, and a catalytically active metal phase selected from the group consisting of partially reduced group IB metals and completely reduced group VIII metals, said metal phase being present in an amount of grater than or equal to about 0.03 wt%, and said catalyst having an initial diolefin hydrogenation activity, treating a hydrocarbon feedstock having a diolefin content of greater than or equal to about 0.1% and a nitrite content of greater than or equal to about 2 ppm with said catalyst until said initial diolefin hydrogenation activity of said catalyst decreases to a reduced diolefin hydrogenation activity, flushing said catalyst with an inert gas so as to remove traces of hydrocarbon from said catalyst and thereby provide a flushed catalyst, and regenerating said flushed catalyst by further flushing said flushed catalyst with hydrogen so as to provide a regenerated catalyst having a regenerated diolefin hydrogenation activity which is greater than said reduced diolefin hydrogenation activity.
Patent CA-2175751-A1 (CA)
Title: Ceramic type sunscreens
Inventor: ASAOKA HISATOSHI
IPC: A61K8/00
Filed: 1996-05-03
Abstract: The invention is directed to provide novel sunscreen materials which are to protect human skin from the harmful ultraviolet radiation. Said sunscreen materials, designated Bolite-S, according to the invention having a composition, expressed in terms of moles of oxides as follows:     mRO:vB2O3:wFe2O3:xSiO2:yTiO2:zH2O     wherein " R" is selected from the group consisting of hydrogen, the alkyl groups of which contain 1-5 carbon atoms, and mixtures thereof, "m" is a value greater than 0 but not exceeding 1200, " v" is a value greater than 0 but not exceeding 500, " w" is a value greater than 0 but not exceeding 100, "x" is a value greater than 0 but not exceeding 200, "y" is a value of from 1 to 300 and "z" is a value of from 0 to 300, said Bolite-S materials in calcined form having a characteristic X-ray powder diffraction pattern which contains the interplanar spacings and their assigned strengths set forth in Table 1.
Patent CA-2177477-A1 (CA)
Title: Automated method and system for the segmentation of medical images
Inventor: BICK ULRICH
IPC: G06T5/30
Filed: 1994-11-29
Abstract: A method for the automated segmentation of medical images (figures 5, 11, 12 and 20), including generating image data (figure 19) from radiographic images of the breast (figure 5). The method is applicable to breast mammograms including the extraction of the skinline as well as correction for non-uniform exposure conditions, hand radiographs (figure 11), and chest radiographs (figure 12). Techniques for the segmentation include noise filtering (152 of figure 15), local gray value range determination (153), modified global histogram analysis (154), region growing and determination of object contour (155). The method also is applicable to skin detection and analysis of skin thickening in medical images, where image segmentation (164), local optimization of external skinline (166), creation of a gradient image, identification of the internal skinline (167) and then skin thickness determination are carried out.
Patent CA-2180108-A1 (CA)
Title: Collapsible container for fluid products
Inventor: VAN GIEZEN MAURICE GERARDUS MA
IPC: B65D88/22
Filed: 1995-01-05
Abstract: A container device for bulk goods or liquid comprises a folding frame (1) and a container (2) accomodated in the frame, which frame comprises a base section (3) as well as at least two folding side sections (4, 5) provided on opposite sides of the base section, which side sections are movable between a horizontal position and an upright position. The frame has a top section (13) which is supported some distance above the base section and foldably interacts with one of the sides.
Patent CA-2185121-A1 (CA)
Inventor: GOETZ RICHARD J
IPC: C09J7/38
Filed: 1995-02-24
Abstract: A pressure sensitive adhesive tape that employs a water-absorptive backing, a microparticle-containing pressure sensitive adhesive and a water-dispersible component is provided. A method of bonding close fitting parts is also disclosed. In the method, a microparticle-containing pressure-sensitive adhesive tape (with or without the water-dispersible component in the adhesive) is employed. Articles made using the tape and/or by the method are also disclosed.
Patent CA-2185984-A1 (CA)
Title: Medicament for the alleviation or treatment of symptom derived from ischemic disease and compound useful therefor
Inventor: ANNOURA HIROKAZU
IPC: C07D295/185
Filed: 1996-01-23
Abstract: A medicine having the following basic structure, for the alleviation or treatment of symptoms derived from ischemic diseases and seizures, epilepsy, and migraine, having a powerful action in suppressing cytotoxic Ca21 overload and free from side-effects:     see formula wherein Z = C, CH, or N, X = O or CH2, E and Y = H, OH, a halogen, alkoxy, alkyl, or a halogen-substituted alkyl.
Patent CA-2187080-A1 (CA)
Inventor: CRANE TIMOTHY T
IPC: B42D15/00
Filed: 1995-02-15
Abstract: A visually verifiable and machine-readable security thread having at least two security detection means located thereon, where a first security detection means comprises a machine-readable repeating pattern and where a second security detection means comprises visually verifiable metal-formed indicia. Such security threads are suitable for use with security documents, such as banknotes and the like, labels and any other documents or means of identification used for purposes which make the verification of the authenticity of each specimen desirable at least once in its lifetime.
Patent CA-2187354-A1 (CA)
Title: Semiconductor devices and methods
Inventor: HOLONYAK NICK JR
IPC: H01S5/343
Filed: 1995-04-06
Abstract: By implementing oxidation to obtain a native oxide of aluminum (581, 582) after a device has been metallized (505, 565), advantages can be obtained in device operation, reliability, and life. A method of making a semiconductor device is disclosed and includes the following steps: forming a structure comprising layers of III-V semiconductor material, at least one of the layers being an aluminum-bearing III-V semiconductor material (530, 550); applying metal electrodes (505, 565) to the structure to form a metallized semiconductor structure; and heating the metallized structure in a water-containing environment to convert a portion of the aluminum-bearing III-V semiconductor material to a native oxide of aluminum (581, 582).
Patent CA-2193520-A1 (CA)
Title: Use of procysteine as a depigmentation agent
Inventor: GALEY JEAN-BAPTISTE
IPC: A61K8/00
Filed: 1996-12-19
Abstract: The use of L-2-oxothiazolidine-4-carboxylic acid (I) (procysteine) in cosmetic or dermatological compositions as agent for depigmenting and/or whitening the skin, is new.
Patent CA-2193709-A1 (CA)
Title: Method and apparatus for ion beam transport
Inventor: CHEN JIONG
IPC: H01L21/265
Filed: 1996-12-20
Abstract: Method and apparatus for maintaining an ion beam along a beam path from an ion source to an ion implantation station where workpieces are treated with the ion beam.  A beam neutralizer is positioned upstream from the beam implantation station and injects neutralizing electrons into the ion beam.  A magnetic field is created upstream from the position of the beam neutralizer for inhibiting upstream movement of neutralizing electrons.  A disclosed technique for setting up the magnetic field for inhibiting electron movement is with spaced apart first and second permanent magnets.
Patent CA-2195643-A1 (CA)
Inventor: CAILLIAU JOEL
IPC: E01B9/30
Filed: 1995-07-21
Abstract: L'invention concerne un dispositif de fixation d'un rail (R) de chemin de fer sur une traverse (T), comprenant notamment une semelle souple (3) de support et des attaches latérales constituées de boucles (10). Selon l'invention, ladite traverse (T) comporte une cavité longitudinale (2) dans laquelle est logée la semelle de support (3) et en ce que lesdites attaches latérales (1) sont constituées de ressorts comportant au moins une boucle hélicoïdale (10) destinée à être mise sous tension par déformation élastique et verrouillage d'au moins un tronçon en butée de retenue contre les bords internes (20) de ladite cavité (2) et en appui sur la base du rail (R).