baber/WOPTO huggingface dataset:
Patent CA-2151988-C (CA)
Title: Carrier for electrophotography, two component-type developer and image forming method
Inventor: OKADO KENJI
IPC: G03G9/113
Filed: 1995-06-16
Granted: 2001-12-18
Abstract: A carrier for electrophotography is constituted by magnetic carrier core particles and a resin coating layer coating the magnetic carrier core particles.  The carrier core particles contain a magnetic ferrite component represented by the following formula (I):        (Fe2O3)X(A)y(B)z (I), wherein A denotes a member selected from the group consisting of MgO, AgO and mixtures thereof; B denotes a member selected from the group consisting of Li2O, MnO, CaO, SrO, A1203, SiO2 and mixtures thereof; and x, y and z are numbers representing weight ratios and satisfying the relation of: 0.2  x  0.95, 0.005  y 0.3, 0 < z  0.795, and x+y+z  1.  The coated carrier particles thus formed exhibit excellent performances in continuous image formation.
Patent CA-2155100-C (CA)
Title: Apparatus and method for switching high power levels
Inventor: SCHAUDER COLIN D
IPC: H03K17/10
Filed: 1994-01-10
Granted: 1997-01-14
Abstract: A valve for rapidly switching high voltage at high currents includes several identical modules (2) series-coupled between high voltage rails (4,6). Each module (2) includes a three-terminal semiconductor voltage controlled gate turn-off device (8), an input port (I) for receiving a gate drive signal, input circuitry (22, 24), two switching ports (U,L) coupled to the turn-off device (8) output terminals, and an output circuit coupled across the device output terminals. The output circuit includes a clamping mechanism (12) and regulated clamp voltage circuit (14) that maintains a safe, regulated maximum differential potential across the device (8). Because each module is identical, any non-simultaneous switching of the various devices (8) in the series-coupled modules causes only a slight disparity in the amount of energy absorbed by each regulated clamp voltage circuit (14). Further, each module (8) sees substantially the same differential potential between the module output ports, and operates independently regardless of where in the series-coupled chain the module is located.
Patent CA-2155792-C (CA)
Inventor: KRAMER VANCE M JR
IPC: F16L55/11
Filed: 1995-08-10
Granted: 2005-05-17
Abstract: A rigid end socket is formed on a length of flexible rubber tubing for receiving a tube coupler or a radially expandable end plug in a tightly retained manner.  The end socket is formed by placing a sleeve of uncured rubber on a forming mandrel and then placing a rigid collar over an end of the sleeve spaced somewhat from the end.  The outer length portion of the sleeve is folded over the collar to enclose the collar between an inner length portion and the outer length portion. Then the resulting product is cured to produce a flexible tube with a rigid socket at one end.
Patent CA-2158343-C (CA)
Inventor: DYER JOHN JOSEPH
IPC: B65D1/02
Filed: 1994-02-17
Granted: 2005-02-08
Abstract: Disclosed is a bottle (10) for containing a fluid and dispensing the fluid in conjunction with a fluid dispensing system. The bottle (10) includes means (35) to resist paneling during the dispensing of the fluid.
Patent CA-2158708-C (CA)
Title: Cover for a golf bag throat structure
Inventor: KELLER GARY E
IPC: A63B55/00
Filed: 1995-09-20
Granted: 1999-08-10
Abstract: A cover for a golf bag throat structure is constructed to be easily removable from and reattachable to the throat structure. The cover includes an outer portion for covering a peripheral ring on the throat structure, and an inner portion for covering cross bars on the throat structure. The cover outer portion includes a first side wall disposed inside the peripheral ring, a second side wall disposed outside the peripheral ring, and a top wall connecting the side walls. A strip of material mounted on the first side wall is arranged for interlocking engagement with an internal lip extending circumferentially of the throat structure on the peripheral ring. The cover inner portion is substantially U-shaped in cross section including a pair of flanges that are detachably fastened together in order to attach the cover inner portion to the cross bars on the throat structure.
Patent CA-2173248-C (CA)
Title: Head mounted display system with aspheric optics
Inventor: HEACOCK GREGORY LEE
IPC: G02B27/22
Filed: 1994-09-23
Granted: 2005-02-01
Abstract: A binocular head mounted display system is shown utilizing an aspheric lens (20, 22) in each of the user's right-eye and left-eye optical paths.  The aspheric lens (20 or 22) is formed with a number of concentric zones for controlling the distance at which an image of displayed information is projected from the user and to minimize distortions across the virtual image.  The distance between each lens (20 or 22) and its respective display (24 or 26) is independently variable.  Further, the distance between the optical system as a whole and the user's eyes is variable.
Patent CA-2177438-C (CA)
Inventor: CHANG CHI-HWEY
IPC: H04L7/00
Filed: 1996-05-27
Granted: 2003-06-10
Abstract: An apparatus for providing wireless transmission of information in electronic display systems and methods of using the same. In particular, the present invention is directed to an air interface and protocol to facilitate wireless transmission of information from a communication base station or other controlling device to individual electronic display modules.
Patent CA-2179532-C (CA)
Title: Dry pet food, process for producing it and device for carrying out the process
Inventor: JANOT DENIS
IPC: A23K1/18
Filed: 1996-06-19
Granted: 2007-11-13
Abstract: Dry pet food, process for producing it and device for carrying out the process The invention relates to a dry pet food (9), obtained from an extruder (4), having a lamellar structure, a moisture content of between 2 and 15%, a protein content of between 14 and 35%, a carbohydrate content of at least 25% and a lipid content of between 2 and 20% and having a density of between 0.3 and 0.6.
Patent CA-2181105-C (CA)
Inventor: DUFOUR JEAN-GUY
IPC: G01C9/28
Filed: 1996-07-12
Granted: 2002-01-22
Abstract: A line level comprises a hollow housing having a pair of end portions and a sight opening formed therein. A liquid level indicator has a pair of closed end walls and is observable through the sight opening is slidably received in the housing. A line engaging retainer arrangement is slidable into an interference fit in each of the open end portions of the housing and is engageable with each of the closed end walls of the liquid level indicator for maintaining the position of the liquid level indicator relative to the sight opening in the housing.
Patent CA-2184970-C (CA)
Title: Disposable absorbent undergarment
Inventor: ONO YOSHIO
IPC: A61F13/76
Filed: 1996-09-06
Granted: 2000-06-06
Abstract: An absorbent disposable undergarment comprises pants and an absorbent pad detachably attached to the pants.  First suspending  flaps  hang  down  from  an  inner  side  of  a stretchable waist-opening peripheral edge toward a crotch section of the pants.   The  first  suspending  flaps  are provided with first fastening means.  Second suspending flaps extend from longitudinally opposite ends of an absorbent core of the pad.  The second suspending flaps are provided with second fastening means which are releasably engaged with the first fastening means.
Patent CA-2185707-C (CA)
Title: Procede et dispositif de fabrication d'un tube a orientation biaxiale a partir d'une matiere thermoplastique
Inventor: PRENGER JAN HENDRIK
IPC: B29C48/90
Filed: 1995-05-03
Granted: 2006-03-21
Abstract: Le procédé consiste à extruder un tube en matière thermoplastique puis à faire passer le tube de force sur un mandrin (6) à une température d'orientation de la matière plastique. Le mandrin comporte une section dilatable (8) provoquant une dilatation du tube dans le sens circonférentiel. Un dispositif (12) de régulation de la vitesse du tube intervient sur le tube en amont de la section dilatable du mandrin afin de soumettre le tube à une force axiale, et un dispositif de traction (20) intervient sur le tube en aval du mandrin (6) afin de soumettre le tube à une force axiale de traction. On porte à une température inférieure à la température d'orientation initiale la matière plastique constitutive d'une couche externe de la paroi du tube, en amont du dispositif (12) de régulation de la vitesse du tube, cette couche étant celle sur laquelle intervient ce dispositif et étant suffisamment épaisse pour résister à la force exercée par ledit dispositif de régulation de la vitesse du tube.
Patent CA-2186547-C (CA)
Title: Switching power supply regulator
Inventor: HELFRICH KENNETH JAY
IPC: H04N3/18
Filed: 1996-09-26
Granted: 2006-05-09
Abstract: A horizontal deflection circuit inductively couples pulses from a first winding of a transformer to a second winding of the transformer. The second winding is coupled to a source of unregulated DC voltage. A switch operates with a variable duty cycle, supplying a regulated DC voltage to the first winding. An inductor and a diode have a common junction coupled to the second winding. The inductor couples the unregulated DC voltage to the switch. A pulse width modulator varies the duty circle of the switch responsive to a feedback signal. First and second capacitors supply drive voltage to the switch. The first capacitor is charged by the unregulated DC voltage during retrace, and at the end of retrace, charges the second capacitor. The pulse width modulator discharges the second capacitor.
Patent CA-2191038-C (CA)
Inventor: QUENTIN LARRY E
IPC: B65G17/08
Filed: 1996-11-22
Granted: 2004-09-21
Abstract: Disclosed herein is a conveyor comprising a first conveyor element including an end comprising an interiorly located eye including therein an opening, and an end eye adjacently spaced from the interior eye to define therebetween a space and including therein an opening located in axial alignment with the opening in the interiorly located eye and having a given dimension, a second conveyor element including an end comprising an eye extending into the space between the end eye and the interiorly located eye and including therein an opening axially aligned with respect to the openings in the end eye and the interiorly located eye, and a hinge pin including a cylindrical portion extending in the opening in the interiorly located eye of the first conveyor element and in the opening in the eye of the second conveyor element, and an axially outwardly diverging conically shaped end portion extending axially from the cylindrical portion and including a diametrically and axially extending slot defining opposed barbs having outer ends located in adjacent relation to the end eye and having a dimension greater than the dimension of the opening in the end eye so as to normally be impassable through the opening in the end eye, whereby to normally prevent axially outward passage of the hinge pin through the end eye and whereby to permit passage of the hinge pin through the opening in the end eye when the barbs are displaced toward each other.
Patent CA-2192018-C (CA)
Title: Icebox
Inventor: MCCLELLAN ROBERT L
IPC: F25D11/00
Filed: 1996-12-04
Granted: 2004-02-24
Abstract: A refrigerated icebox employs a cabinet that is internally corrugated to provide a multiplicity of lengthwise channels for air flow within the enclosure defined. The cabinet has a top wall that is provided with an opening to accommodate a drop-in refrigeration unit, and it is, in the main, integrally formed as a single piece.
Patent CA-2193797-C (CA)
Title: Christmas lamp socket
Inventor: HUANG SHUN-FENG
IPC: F21V27/00
Filed: 1996-12-23
Granted: 2000-03-14
Abstract: A Christmas lamp socket includes a housing and an inner body inserted vertically in the housing, and a lamp inserted vertically in the inner body. The housing has two opposite vertical ridges in an inner peripheral surface and two opposite vertical tubular hooks on an outer peripheral surface. The hooks respectively have a vertical slot and two electric leads of power are contained and hooked in the hooks with proper tightness preventing the leads from dispersing or twisting with each other when the sockets are organized into a Christmas lamp net.
Patent CA-2194199-C (CA)
Title: Encoding system and decoding system for audio signals
Inventor: IWADARE MASAHIRO
IPC: H04B1/66
Filed: 1996-12-31
Granted: 2000-12-05
Abstract: An encoding system comprises an input terminal for receiving an input signal, a signal converting portion for converting the input signal into frequency-domain signals and grouping several frequency-domain signals into blocks, an analyzing portion for analyzing the input signal and the frequency-domain signals and obtaining an allowable error, a selecting portion for selecting one of a plurality of quantizing portions that quantizes frequency-domain signals of each block corresponding to the allowable error, a plurality of quantizing portions for quantizing frequency-domain signals corresponding to selection information and calculating amplitude information and codes, a multiplexing portion for multiplexing the amplitude information, codes, and selection information, and an output terminal for outputting the multiplexed signal.
Patent CA-2195517-C (CA)
Inventor: ETHIER ROBERT
IPC: A42B1/06
Filed: 1997-01-20
Granted: 2005-08-02
Abstract: A convertible hat comprises a crown formed of flexible material and having a peripheral edge defining a head-receiving opening, a visor flexibly attached to the crown along a section of the peripheral edge and projecting forwardly from the crown, a removable strap extending about and exteriorly of the crown adjacent the peripheral edge, guide means for guiding and retaining the strap adjacent the peripheral edge. Releasable fastening means for releasably attaching free ends of the strap to the crown at predetermined locations on opposite sides thereof. Further releasable fasteners are also provided for releasably attaching the visor to a rear portion of the crown. The strap is arranged about the crown and attached thereto so that when the strap is pulled away from the crown in a forward or rearward direction, the opening is contracted and the crown forms a bag with the strap defining a handle for carrying the bag and the visor defining a closure flap for closing the contracted opening, the further fasteners being operative to releasably retain the closure flap in a closed position, whereby the hat is converted into a handbag.
Patent CA-2198181-C (CA)
Inventor: VAUGHAN DON
IPC: F16K11/074
Filed: 1997-02-21
Granted: 2000-10-17
Abstract: A control valve is provided for a water conditioning system having a mineral tank. The control valve includes a housing having an upper body portion and a lower body portion. The housing defines a chamber located between the upper and lower body portions. The upper body portion includes a first upper port, a second upper port, and a third upper port. The lower body portion includes a first lower port, second lower port, and a third lower port which provide fluid communication with the tank. A cylindrical disk is located within the chamber and is selectively rotatable about a central axis. The disk includes an upper face having a generally centrally located aperture and a peripherally located aperture.  The disk also includes a spaced apart lower face having a first peripherally located aperture and a second peripherally located aperture. A first fluid passage extends through the disk between the centrally located aperture in the upper face and the first peripherally located aperture in the lower face.  A second fluid passage extends through the disk between the peripherally located aperture in the upper face and the second peripherally located aperture in the lower face.  Rotation of the disk about the central axis to one of various different positions as desired provides selective fluid communication between the upper ports in the upper body portion and the lower ports in the lower body portion of the control valve.
Patent CA-2201629-C (CA)
Inventor: WITT HARRO
IPC: B01J19/00
Filed: 1995-09-25
Granted: 2005-05-24
Abstract: A reactor is described for exothermic sludge phase reactions which comprises as the heat exchanger an annular chamber which is covered at the top and the bottom by the reaction mass in the reactor, the annular chamber comprising a plurality of vertical passage ducts having a circular cross-section for the reaction mass , and the coolant flowing through the annular chamber between the passage ducts for th e reaction mass.
Patent CA-2204657-C (CA)
Title: Process for the preparation of absorbent materials
Inventor: HSU JAY CHIEHLUNG
IPC: B01J20/00
Filed: 1997-05-06
Granted: 2007-01-30
Abstract: Methods are provided for preparing absorbent material, comprising providing non-broken down and uncut recycled fiber sludge having a moisture content of greater than about 40%; pelletizing said recycled fiber sludge to form wet pellets;  and drying said wet pellets. The absorbent material is particularly useful as an industrial-grade waste liquid absorbent and/or an animal litter.
Patent CA-2205213-C (CA)
Title: A device and a method for safeguarding an article against theft
Inventor: AGUILAR PEDRO LLORT
IPC: G08B13/24
Filed: 1997-05-12
Granted: 2001-12-11
Abstract: The invention relates to a device and a method for electronic supervision of articles, consisting of a security element which is connected to an article to be safeguarded and which is excited by a magnetic alternating field generated within an inquiry zone to send a characteristic signal by which an alarm is triggered. The objective of the invention is to propose a device and a method which respectively render removal of a security element from an article to be safeguarded considerably difficult. The task is solved by the device in that a protective film is provided which completely covers the security element and the article at least in the area of the security element.
Patent CA-2206169-C (CA)
Inventor: JONES WILLIAM LESLIE
IPC: E21B17/07
Filed: 1997-05-26
Granted: 2005-11-22
Abstract: A bit retention device for a bit and chuck assembly of a down-the-hole, percussive drill, for retaining a head section of a bit should the head section separate from a shank of the bit includes a chuck adapted for threadable connection to a drill casing, a drill bit, a bit retaining shoulder in the the assembly; a wear collar concentric about the chuck and bit and a flexible retaining member removably connected to the assembly, the retaining member extending radially between the wear collar and bit a sufficient distance to contact the retaining shoulder should the bit drop axially downwardly.
Patent CA-2207002-C (CA)
Inventor: ISAK HEINZ
IPC: C07B61/00
Filed: 1995-11-14
Granted: 2007-01-23
Abstract: A process is disclosed for preparing halogenated methyl benzoyl cyanides having the formula (I): PH-CO-CN, in which Ph stands for a phenyl rest substituted by chloromethyl or bromomethyl that may optionally carry 1-4 other rests, from halogenated methyl benzoyl chlorides having the formula (II): PH-CO-Cl. The compound having the formula (II) is reacted with a cyanide-releasing compound in the presence of a Lewis acid, optionally in an inert organic solvent or diluent, and the product obtained by this process is then isolated. The halogenated methyl benzoyl cyanides having the formula (I) are important intermediate products for the synthesis of plant protective agents.
Patent CA-2211735-C (CA)
Inventor: MCCARTHY SHAUN
IPC: G06F21/88
Filed: 1996-02-23
Granted: 2008-04-08
Abstract: This application describes a means for inhibiting the theft of an electronic device. The electronic device generally comprises a processor unit and a display device for displaying operational output from the processor unit, and the invention resides in including within the electronic device a receiver unit adapted to receive remotely transmitted signals and capable of causing the processor unit to at least partially obscure or change the output on the display device after such a signal has been received. The electronic device can be any device that produces a visible output. In preferred forms of the invention, the obscuring of the display output is by overprinting a message informing you that the device is stolen, and more preferred versions include a unique identification code in that message. This enables the authorities to identify the true owner of the article. The receiver unit can be the receiver of a radio pager, for example. Thus, on noticing the theft of the device the owner alerts a service provider who activates the receiver unit.
Patent CA-2211981-C (CA)
Title: Production of enantiomerically enriched ortho-substituted .alpha.,.alpha.-diaromatic methanols
Inventor: CANTRELL WILLIAM RHODES
IPC: C07C29/143
Filed: 1996-02-06
Granted: 2008-04-15
Abstract: A method of producing compounds of formula (I), wherein one of R1 and R2 is selected from -OH, -SH, and -NHR7; and the other of R1 and R2 is selected from H, -OH, -SH, -NHR7 and R8; R3 and R4 are each independently selected from R8; n and m are each independently 3; and each R5 and each R6 is independently selected from -OH, -SH, -NHR7, and R8; and R8 is as detailed in the specification; in enantiomerically enriched form, comprising reducing a compound of formula (H), wherein R1-R6 are defined as in formula (I), in the presence of B-haloisopinocampheylborane.
Patent CA-2217688-C (CA)
Title: Coupling of light into a monolithic waveguide device
Inventor: INGENHOFF JAN
IPC: G02B6/12
Filed: 1997-10-07
Granted: 2006-12-05
Abstract: An optical system for coupling light from a monolithic waveguide chip from one optical path to another on different layers of the chip or into or out of the chip along an edge thereof by coupling a GRIN lens to the edge. Coupling a GRIN lens having a reflective end allows light to be launched out of and back into the waveguide chip.  Alternatively a GRIN lens having a plurality of fibers coupled thereto can be used to couple signals carried by the fibers into the waveguide chip.
Patent CA-2226214-C (CA)
Title: Antifungal agent, compound therefor, process for producing the same, and method for using the same
Inventor: KODAMA HIROKI
IPC: C07D521/00
Filed: 1996-07-05
Granted: 2007-04-17
Abstract: R-(+)-(E)-[4-(2-Chlorophenyl)-1,3-dithiolan-2-ylidene]-1- imidazolylacetonitrile, R-(-)-(E)-[4-(2,4-dichlorophenyl)-1,3-dithiolan-2- ylidene]-1-imidazolylacetonitrile, and pharmaceutically acceptable salts thereof which can be used as a pharmaceutical agent are disclosed. A process for producing them and a method for treating mycoses using them ar e also disclosed.
Patent CA-2228678-C (CA)
Title: Method and apparatus for making herringbone gears and pumps incorporating the same
Inventor: CARR CHARLES F
IPC: B29D15/00
Filed: 1998-02-04
Granted: 2000-11-21
Abstract: A method of manufacturing herringbone gears using an injection molding process is provided. An apparatus for manufacturing herringbone gears with an injection molding process is also provided. The apparatus and process involves the use of two separable mold halves each of which include a mold cavity for molding one half of the gear. Moldable material is injected into the mold halves when they are in a sealing abutting engagement. After the material solidifies, the mold halves are separated and the gear is simultaneously unscrewed from each mold cavity.