baber/WOPTO huggingface dataset:
Patent CA-2018563-C (CA)
Inventor: EFFLAND RICHARD CHARLES
IPC: A61K31/7042
Filed: 1990-06-08
Granted: 2000-09-19
Abstract: This invention relates to a N-heteroaryl-purin-6-amine of the formula (see formula I), where R1 is hydrogen, lower alkyl, and arylloweralkyl; R2 and R3 are independently hydrogen, lower alkyl or R2 and R3 taken together are aryl;      R4 and R5 are independently hydrogen, lower alkyl, or R4 and R5 taken together are aryl; R6 is hydrogen, lower alkyl, aryl, arylloweralkyl, (see formula II), and (see formula III), where R2, R3, R4 and R5 are as defined above, and the pharmaceutically acceptable acid addition salts thereof sand where applicable the geometric and optical isomers and racemic mixtures thereof. The compounds of this invention display utility as analgesic and anticonvulsant agents.
Patent CA-2028290-C (CA)
Title: Tray, apparatus and method for propagating, growing and handling plants
Inventor: VAN WINGERDEN AART
IPC: A01G9/06
Filed: 1990-10-23
Granted: 1996-12-17
Abstract: There is provided an apparatus and method for propagating, growing and handling plants. A tray is provided having a plurality of spaced apart elongated containers which are removably attached to one another. Each container has a plurality of planting compartments with adjacent planting compartments being separated by an air compartment each having an elongated opening which permits the movement of air into the root system of a plant located in an adjacent compartment. The air compartments also provide for vertical airflow to the leafy parts of the plants. The elongated containers are readily separated from one another and reassembled using automated apparatus. The automated apparatus removes the plants from the container for grading, transplanting and/or packaging.
Patent CA-2034888-C (CA)
Title: Communications system ingress and egress arrangement
Inventor: ASH GERALD RICHARD
IPC: H04M7/06
Filed: 1991-01-24
Granted: 1996-06-04
Abstract: A communications network is arranged so that an external switching office is connected to the network via multiple ingress/egress nodes such that an originating node which receives a call destined for the external office may route the call through the network to one of the ingress/egress nodes in accordance with aparticular class (type) of routing specified in one of a number of routing treatments. Such routing treatments are associated with the external office and at least identify respective ones of the ingress/egress nodes connected to the external office.
Patent CA-2035368-C (CA)
Title: Child resistant closure and package
Inventor: KUSZ MAXIMILLIAN
IPC: B65D41/04
Filed: 1991-01-31
Granted: 2000-05-02
Abstract: A child resistant closure adapted to be used with a container to provide a child resistant package comprising a closure having a base wall and a peripheral skirt with internal threads adapted to engage complementary threads on the container.      The closure is provided with a plurality of circumferentially spaced flexible fins which frictionally engage the apex only of an annular bead on the container to provide resistance to closure back off in order to resist unthreading of the closure from the container. The closure is be provided with a tab which is engageable with a projection on the container to prevent unthreading of the closure except when the tab is depressed.      In another form, a cylindrical surface on the skirt fractionally engages solely the apex of the annular bead on the container.      The cylindrical surface may be a continuous surface or a series of closely spaced annular serrations and alternating fine grooves. The closure may also be used without a tab to provide a secondary seal on a conventional threaded closure.
Patent CA-2040760-C (CA)
Title: Parts efficient memory based functional circuit having selectable transfer characteristics
Inventor: ZDEPSKI JOEL W
IPC: G05B11/36
Filed: 1991-04-18
Granted: 1998-06-30
Abstract: A processing system requiring adaptive selection of ones of a family of transfer functions is implemented with a single transfer function element arranged to perform a transfer function representative of the family of functions. Respective ones of the family of transfer functions are realized by selectively offsetting and/or scaling signal applied to the transfer function element and selectively offsetting and scaling signal provided by the transfer function element.
Patent CA-2053277-C (CA)
Title: Use of lipoxin a4 and its derivatives as antagonists for slow-reacting substances of anaphylaxis
Inventor: SERHAN CHARLES N
IPC: A61P31/04
Filed: 1990-04-27
Granted: 2001-04-24
Abstract: Composition and methods are disclosed for antagonizing SRS-A; and especially LTD4, comprising the administration of LXA4 or an active derivative thereof to an animal. These compositions and methods are useful in the control of hemostasis, vascular reactivity, and especially vasoconstriction, and, anaphylactic and allergic reactions in animals.
Patent CA-2053818-C (CA)
Title: Sound absorptive file cabinet door
Inventor: EDWARDS JOHN
IPC: A47B88/00
Filed: 1991-10-21
Granted: 1995-10-24
Abstract: A file cabinet is disclosed which has a door with high sound absorption properties.  The door has metal front and rear panels and an intermediate layer of sound absorbing material sandwiched therebetween.  An array of openings are cut through both the front and rear panel.          Sound impinging on the front panel enters the cabinet via the door and is attenuated in the door and cabinet.          Preferably, paper files are stored within the file cabinet with their peripheral edge surfaces disposed towards the rear panel to assist in attenuating sound within the cabinet.
Patent CA-2053929-C (CA)
Title: Method and apparatus for recovering and purifying refrigerant
Inventor: PAIGE LOWELL E
IPC: F25B45/00
Filed: 1991-10-22
Granted: 1994-05-03
Abstract: ABSTRACT OF THE DISCLOSURE          A method and apparatus for recovering and purifying refrigerant contained in a refrigeration system has a first mode of operation wherein refrigerant is withdrawn from the system being serviced, compressed, condensed and delivered in liquid form to a refrigerant storage means.  The pressure ratio across the recovery compressor is monitored, and, when the pressure ratio exceeds a value above which the compressor may be adversely affected withdrawal of the refrigerant from the refrigeration system is terminated.  The system is then operated in a closed, cooling mode wherein refrigerant recovered from the system and stored in the storage means is withdrawn therefrom by the compressor, compressed condensed, and expanded and returned to the storage means to thereby lower the temperature and pressure of the storage means and the refrigerant contained therein.  Means for purifying the withdrawn refrigerant are located upstream from the compressor suction port so that refrigerant purification takes place during all modes of operation.  When the temperature in the refrigerant storage cylinder falls to a predetermined level the system is returned to the recovery mode.  During the second recovery cycle, because of the substantially lower temperature in the recovery system, the refrigerant storage cylinder effectively serves as a condenser.            The system may be operated in a liquid recovery cycle wherein liquid refrigerant is delivered directly to the storage means. The system is shifted from liquid recovery to vapor recovery responsive to, either, a decrease in liquid level increase in the storage means, or, several system control parameters. Apparatus for sampling the purity of refrigerant flowing through the recovery system is provided.
Patent CA-2061142-C (CA)
Title: Mosfet switch matrix
Inventor: NINNIS THOMAS JAMES
IPC: H03K17/12
Filed: 1992-02-13
Granted: 2002-09-24
Abstract: A solid state switch matrix for developing a high current, high voltage output power pulse in response to a small signal input pulse includes a plurality of solid state switch modules and a controller. Each of the modules has a small signal input, a large signal input and an output. The modules are arranged in rows and in columns such that modules in each of the rows are connected in parallel and modules in each of the columns are connected in series. The controller has an input to which the input pulse is applied and develops a switching pulse for application to the small signal input of each of the modules in response to the input pulse. Each of the modules becomes conductive between its large signal input and its output in response to said switching pulse. When each module is conductive, the matrix is conducive between the large signal input of each of the modules connected in parallel in a first row and the output of each of the modules connected in parallel in a last row to develop the output power pulse.
Patent CA-2065929-C (CA)
Title: Peritoneal dialysis catheter
Inventor: TWARDOWSKI ZBYLUT J
IPC: A61M25/00
Filed: 1992-04-13
Granted: 2003-01-14
Abstract: A peritoneal dialysis catheter comprises a distal tubular section and a proximal tubular section, connected together by nonintegral tubular connector means so that the respective sections are connected together in sealed flow relation. Such a catheter may be surgically implanted in the peritoneal cavity, extending to the chest of the patient with an end thereof protruding from the chest. The respective ends of the catheter section may be connected to each other through the tubular connector means as the tubular sections are surgically implanted, and typically after such implantation is substantially complete.
Patent CA-2070142-C (CA)
Inventor: CHEN CHUNG-I
IPC: B62M3/08
Filed: 1992-06-01
Granted: 1996-07-23
Abstract: A quick-release clipless pedal includes a cleat to be secured to a shoe sole and a pedal body to be mounted on a pedal shaft and releasably  retaining  the cleat. The cleat has first and second engaging parts respectively formed on front and rear ends thereof. The pedal body includes a frame portion and a tubular portion which partitions the frame portion in a transverse direction. The tubular portion receives one end of the pedal shaft. The frame portion has front and rear ends respectively formed with an opening. The pedal body further includes a pair of cleat engaging members respectively provided on upper and lower sides of the tubular portion and respectively having a claw portion to receive releasably the first engaging part of the cleat, and a pair of retaining units revertably engaging the second engaging part of the cleat. The cleat is rotatable relative to the pedal body so as to disengage the first engaging part from the claw portion. Rotation of the cleat causes the cleat to push hook units of the retaining units rearward, thereby causing the hook units to pivot and allow a lateral disengagement of the cleat from the pedal body.
Patent CA-2070768-C (CA)
Title: Apparatus and method for detecting intermodulation distortion in a radio frequency receiver
Inventor: JOHNSON ROBERT M JR
IPC: H04B1/10
Filed: 1992-06-09
Granted: 1999-03-02
Abstract: A radio frequency receiver (300) typically contains electronic devices commonly used in amplifying or mixing circuits (315) which are seldom ideal. The non-ideal characteristics of these devices lead to intermodulation (IM) distortion. A measurement of the amplitude of the received signal (301) is taken both unattenuated (503) and attenuated (507). The difference between the two measurements is compared (511) to predetermined limits (L1, L2 or L3) wherein the received signal (310) is determined to be valid, invalid or unsure. valid received signal is demodulated in the receiver (300). An invalid signal, confirming the presence of IM distortion, is rejected. The unsure signal may be rejected or demodulated as determined by the receiver designer. This type of signal characterization is particularly useful for cellular radiotelephones (101) attempting to gain access to the system provider (111) in which it is registered.
Patent CA-2072480-C (CA)
Title: Color video display controller for multi-player gaming systems
Inventor: WASTI HAMID A
IPC: G06F3/14
Filed: 1992-06-26
Granted: 2003-01-28
Abstract: A display controller includes a digital processor adapted for data communication with a central computer, for controllably downloading alphanumeric data and one or both of image attribute data and complete or partial screen images to be displayed on unmodified standard commercial television receivers. Data memory and program memory are coupled to the digital processor, which stores image formatting data or complete images. Programmable logic circuits are coupled to the data output of the digital processor, and in conjunction with the digital processor convert the attributes presented on the data output of the digital processor into a pixel data field wherein each pixel is encoded to one of a number of available color combinations. A color palette converts the pixel field into RGB data. A video encoder takes the RGB data and modulates a subcarrier signal to provide a composite video output. The display controller is preferably part of a networked gaming system with a central computer system managing entry validation and/or selection or crediting of winning entries in a wagering game having numerous players. Distributed agent terminals in data communication with the central computer system manage input of player data and issue of player entries as point of sale terminals under supervisory control of the central computer. A plurality of standard commercial television receivers are coupled respectively to the video buffers, and simultaneously display the image in conjunction with the respective agent terminals, thereby displaying game data to numerous players at retail locations.
Patent CA-2076549-C (CA)
Inventor: PAIK KYUNG W
IPC: C04B37/02
Filed: 1991-12-20
Granted: 2000-10-31
Abstract: A process for direct bonding a copper film to an yttria-doped aluminum nitride substrate comprises treating the substrate by preoxidation at elevated temperature to create an overlying thin film of AlO3, followed by step cooling to a lower temperature. A copper foil of thickness between 1.0 and 4.0 microns and generally perforated or otherwise foraminous, is eutectically direct bonded to the substrate by the known direct bond copper (DBC) process.  The resultant article exhibits high thermal conductivity, low permittivity and high mechanical strength. The peel strength of the copper film on the AlN substrate exceeds the peel strengths previously attainable in the industry.
Patent CA-2095363-C (CA)
Inventor: RUCH KLAUS
IPC: H01L23/10
Filed: 1991-10-31
Granted: 2002-08-13
Abstract: A plastisol composition based on styrene copolymers, plastic-izers and inorganic fillers contains, as styrene copolymers, copolymers which can be produced by emulsion polymerization and contain a) styrene and/or a-methyl styrene and/or p-methyl styrene and b) 3 to 20 wt.-% (relative to the copolymer) meth-acrylic acid and/or acrylic acid and/or itaconic acid. To increase the abrasion resistance, further crosslinkers or strengtheners can be added. The plastisols are suitable for use in motor vehicle construction as underseal material, as an adhesive for hood lining, as a compound for grille protection or as a spot-welding paste, and in the packaging products industry as a sealing compound for container closures or as a seam seal or as a flange-joint adhesive for tin cans.
Patent CA-2096681-C (CA)
Inventor: MARDERO STEVE
IPC: A47C21/08
Filed: 1993-05-20
Granted: 1996-06-04
Abstract: A security rail attachment for a bed comprises a post with an adjustable foot at the lower end, a rail portion mounted within the post and rotatable about the vertical axis of the post and an attachment rail which extends across the end of the bed and includes clamping elements for clamping to angle irons along the sides of the bed. The rotatable rail portion can be latched at four 90° spaced positions by notches in the base of a vertical post of the rail portion which cooperate with a transverse pin in the post. The rail portion can therefore project outwardly from the bed at right angles thereto for assisting the occupant in standing or can lie along the side of the bed to assist the occupant by preventing falling from that side of the bed.
Patent CA-2109962-C (CA)
Title: Process for making superconducting t1-pb-sr-ca-cu oxide films and devices
Inventor: KOUNTZ DENNIS JAMES
IPC: H01L/
Filed: 1992-06-08
Granted: 2002-05-21
Abstract: A process for making a superconducting Tl-Pb-Sr-Ca-Cu-O thin film comprised of at least one phase of the formula Tl0.5Pb0.5Sr2Ca1+n Cu2+n O7+2n where n = 0,1 or 2. The process comprises sputtering an oxide film onto a dielectric sub-strate from an oxide target containing preselected amounts of Tl, Pb, Sr, Ca and Cu, and heating an oxygen-containing at-mosphere in the deposited film in the presence of a source of thallium oxide and lead oxide and cooling the film.
Patent CA-2111184-C (CA)
Title: Power transmitting device of a tape recorder
Inventor: CHOI DO YOUNG
IPC: G11B15/66
Filed: 1993-12-10
Granted: 2002-02-05
Abstract: A power transmitting device of a tape recorder capable of easily transmitting power to a tape loading unit or reel tables includes a loading system driving gear for transmitting the power to the tape loading unit to transmit a tape toward a drum, and a reel-system driving gear for driving the reel tables, in which the gears are selectively driven to receive the power of a capstan motor via transmission and rotating gears operated by a magnetic force and a spring to effectively drive the tape loading unit or the reel tables. By driving the tape loading unit and reel tables with the power of the capstan motor, one motor can be removed to further minimize the deck size.
Patent CA-2112921-C (CA)
Inventor: SCHMIDT GEORGE A
IPC: B62D33/04
Filed: 1994-01-06
Granted: 2005-06-21
Abstract: A frameless container is disclosed having a predetermined length and comprising a floor having floor supports, a roof, a pair of opposing sidewalls and end walls; at least one end wall including an access door. The sidewalls are respectively connected to the floor supports and the roof. The upper portion of each of the opposing sidewalls comprises at least first and second lap jointed panels each having predetermined dimensions for the height, width and thickness. The lower portion of sidewalls comprises a scuff plate with a thickness dimension that generally exceeds that of the lap-jointed panels if both are made of identical strength materials. The scuff plate has its bottom connected to the floor support and its top extending up from the floor by a predetermined distance defining a "scuff zone." The scuff zone has a projection-free surface exposed to the interior of the container. The fasteners that attach the scuff plate to the lap-jointed upper wall portion are arranged into at least one horizontal row located above the scuff zone. The fasteners have low profile heads which project only slightly from the inner surface of the scuff plate.
Patent CA-2121438-C (CA)
Inventor: MARTIN RAYMOND BRUCE
IPC: E03D3/04
Filed: 1994-04-15
Granted: 1998-02-17
Abstract: A pressurized water closet operating system comprises an accumulator  vessel  having  a  flush  valve  assembly  mounted internally thereof both of which are connected at all times to a source of water under pressure.  A hydraulically actuated control valve conditions the flush valve for the discharge of water under pressure from the accumulator vessel.
Patent CA-2122811-C (CA)
Inventor: NEUMAN GEORGE A
IPC: B05D5/06
Filed: 1994-05-03
Granted: 2001-02-13
Abstract: A coated article and method of producing it are disclosed wherein the iridescence caused by the difference between the refractive index of a transparent substrate and the refractive index of a metal oxide coating is reduced by means of two intermediate layers, the first of which, closest to the substrate, has a refractive index higher than the refractive index of the substrate but lower than the refractive index of the second, and the second has a refractive index higher than the refractive index of the first but lower than the retractive index of the metal oxide coating. The thicknesses of the two intermediate layers for optimizing a neutral appearance are determined by the thickness and refractive index of the metal oxide coating.
Patent CA-2124224-C (CA)
Inventor: TACIUK WILLIAM
IPC: C10B1/10
Filed: 1994-05-25
Granted: 1998-09-01
Abstract: The processor is of the type incorporating horizontal, concentric, co-extensive inner and outer tubular members which rotate together. The processor is modified in the following respects: - The front end of the inner tubular member is circumferentially corrugated and may be provided in the form of a plurality of parallel tubes arranged in a ring array, to thereby increase the shell area to promote heat transfer through the tube walls; - Means are provided for interconnecting the tubular members, which means can accommodate differing rates of thermal expansion; and - a rock recycle tube assembly is provided to recover oversize material leaving the corrugated portion of the inner tubular member and reject it from the processor.
Patent CA-2133925-C (CA)
Inventor: VARDEN ARNOLD
IPC: F16K5/20
Filed: 1994-10-20
Granted: 2005-01-11
Abstract: This invention relates to ball valves. One problem with conventional ball valves is that opening and closing the valve causes the valve seal to scrape across the valve seat. This reduces the life of the seal. This scraping problem can be eliminated by retracting the seal from the seat before turning the valve.      Tn this invention, the ball valve has two co-axial handle assemblies. The outer, lever, assembly turns the valve closure member within its housing. The inner, handwheel, assembly is used independently to retract or extend the valve seal from or to the valve seat. The retraction or extension is achieved by use of a jack-screw shaft which pushes the seal in and out. The jack screw shaft is driven by a series of gears - a first bevel gear, a ring gear, and a second bevel gear - driven by the inner handle assembly. The ball valve is also provided with an inspection port. This part permits inspection, repair, or replacement of the valve seal while the valve is in use in its open position.
Patent CA-2134980-C (CA)
Inventor: KOWALSKI THOMAS CHARLES
IPC: E21B43/22
Filed: 1993-05-03
Granted: 1999-08-03
Abstract: Gelatin capsules containing oil field chemicals, preferably weighted with a heavy metal compound, are made more stable under certain conditions by the incorporation of a strong chelating agent. The microcapsules can provide an extended treatment period since many materials that would damage the microcapsules are controlled by the chelating agent.
Patent CA-2135963-C (CA)
Title: Battery-driven electronic appliance
Inventor: ENDO KAORU
IPC: G01R31/36
Filed: 1994-11-16
Granted: 1999-05-11
Abstract: A battery-driven electronic appliance comprises means for generating the threshold voltage value for selectively setting two (high and low) threshold voltage VH or VL depending on whether a specific load, for example, a motor 20 of a group of loads of a battery 15 is operating or not and a battery voltage monitor 21 for determining the advent of the replacing or recharging time of the battery depending on whether the output voltage V 0 of the battery 15 is greater or smaller than the threshold value. Thus, it becomes possible to prevent mistaken determination resulting from the operation of the specific load which is great in power consumption to prevent the memory effect from occurring in, in particular, the secondary battery to enable its effective use until the lifetime of the battery is reached.