baber/WOPTO huggingface dataset:
Patent CA-2193983-C (CA)
Title: Radially expandable polytetrafluoroethylene and expandable endovascular stents formed therewith
Inventor: COLONE WILLIAM M
IPC: B29C48/09
Filed: 1995-06-07
Granted: 2005-07-26
Abstract: Extended, stretched, and sintered tubular PTFE materials (50), which have been radially dilated and resintered, are produced which are suited for use in the medical field, e.g., as liners and covers with support structures (52) for expandable endovascular stents (48).     The PTFE materials have an unusually low REC (Radial Expansion Coefficient) and RER (Radial Expansion Ratio), permitting thin-walled PTFE tubes to expand about 50 % to 400%, or more, before the decline in tensile strength. Tube-form medical implants comprising such PTFE material, methods for making such implants, and endovascular stents formed with such implants are described.
Patent CA-2197062-C (CA)
Title: Drug delivery composition containing chitosan or derivative thereof having a defined z. potential
Inventor: WATTS PETER JAMES
IPC: A61K9/00
Filed: 1995-08-21
Granted: 2007-10-09
Abstract: A drug delivery composition for administration to mucosa is provided. The composition comprises a pharmacologically active compound and particles, preferably powder or microspheres, of chitosan or a chitosan derivative or salt wherein the particles are either solidified or partially cross-linked such that they have a zeta-potential of +0.5 to +50 mV. Solidified particles are made by treating particles made from a water soluble chitosan salt with an alkaline agent such as sodium hydroxide in non-acid containing water to render them insoluble.
Patent CA-2197227-C (CA)
Inventor: HARTMAN ERNEST LESTER
IPC: F23C10/20
Filed: 1995-07-24
Granted: 2000-04-04
Abstract: A fluidized bed system (10) which includes a housing (12) and a floor (14) comprising a plurality of generally parallel tubes (32) joined by fins (34) intermediate adjacent tubes (32). A plurality of nozzle assemblies (30, 50) extend generally vertically in mutually parallel relationship from the floor (14). Each of the nozzle assemblies (30, 50) includes a generally cylindrical body (36) having a centerline disposed in generally perpendicular relationship to the floor (14) and each of the bodies (36) includes a plurality of heads (38) extending generally radially therefrom at an axial extremity thereof remote from the floor (14). In some embodiments of the invention each of the heads (38) are uniformly spaced around the circumferential extent of each of the bodies (36) and each of the heads (38) is generally cylindrical and has a centerline. Each of the centerlines of the heads (38) may be disposed at an angle with respect to a horizontal plan and the angle may be approximately twenty degrees. In some forms of the invention some of the nozzle assemblies (30, 50) each have four heads (38) and some of the nozzle assemblies (30, 50) have two heads (38). In other embodiments all of the nozzle assemblies (30, 50) have two heads (38). In other embodiments all of the nozzle assemblies (30, 50) have four heads (38).
Patent CA-2198662-C (CA)
Title: Edge trimming and board ripping apparatus and method
Inventor: MCGEHEE RONALD W
IPC: B27B1/00
Filed: 1997-02-27
Granted: 2002-08-20
Abstract: An improved saw assembly (30) includes a rotatable arbor (74) on which two or more saw blades (75) are mounted. The driving interface (96, 98) between the saw blades and the arbor permits the axis of rotation of the saw blades to be collinear with the arbor axis (90) or skewed a few degrees (94) in either direction.  A saw blade positioning assembly (72) includes pairs of guide arms (84) which engage the sides (88) of the saw blades to position each saw blade at the proper location along the arbor and at the proper skew angle. The guide arms are moved in unison 30 that the axial position and the skew angle of each of the saw blades can be changed in unison before and during sawing operations.
Patent CA-2200282-C (CA)
Inventor: RENDALL JOHN S
IPC: B01J21/04
Filed: 1997-03-18
Granted: 2002-12-24
Abstract: A method of making activated alumina includes beginning with a leach liquor of potassium and aluminum sulphates that is subjected to a surface-cooled crystallizer with a heat-exchanger input temperature of 160°F and a surface-chilled temperature of 60°F to 80°F.  Crystals of aluminum sulphate are precipitated and recrystalized by evaporation in a vacuum and at an elevated temperature.  Purified crystals of aluminum sulphate are then dried at 50°-60°C.  The dried aluminum sulphate crystals are then dehydrated at 400°-450°C after a rise rate of 10°-20°C per minute to drive off most of the water. A roasting and recalcination step at 900°C-950°C after a rise rate of 10°-20°C per minute is used drive off the sulphate.  The remaining alumina is useful as a high-grade catalyst.
Patent CA-2204089-C (CA)
Inventor: MILLAR BRUCE
IPC: G11C7/22
Filed: 1997-04-30
Granted: 2001-08-07
Abstract: An improved edge-triggered fully digital delay locked loop (DLL), which maintains reliable synchronization from startup and in spite of system clock jitter is described.  An internal clock signal is synchronized with a reference clock signal by propagating the reference clock signal through a variable digital delay path. A wide phase detection region surrounds a selected rising edge of the internal clock signal.  The DLL loop is open as long as the internal clock signal and a target edge of the reference clock signal are not simultaneously within the phase detection region.  To achieve a DLL locked condition, the variable delay is increased from a minimum setting until the edge of the phase detection region is shifted in time just past the target edge of the reference clock. Once the DLL loop has been closed, a clock jitter filter is enabled to reject reference clock jitter effects on the DLL locked condition.  A digital phase detector controls the delay line propagation delay to establish synchronization between the internal clock and the reference clock. Unused delay elements within the variable delay path are deactivated to save power.
Patent CA-2209476-C (CA)
Title: Procede de commutation d'un canal d'un premier chemin de propagation vers un second chemin de propagation
Inventor: COHEN MICHEL
IPC: H04B1/74
Filed: 1997-07-03
Granted: 2004-05-25
Abstract: L'invention fournit un procédé de commutation, à partir d'un chemin de propagation courant (4A) vers un chemin de propagation suivant (5A), d'une communication établie entre une première station (3) et une seconde station (6). Le procédé comprend les étapes de: - mesure d'une valeur représentative de rapport signal à bruit pour chacun des chemins de propagation courant et suivant, - commutation, par la première station station (3), de la communication à partir d'un canal courant selon le chemin de propagation courant (4A) vers un canal suivant selon un chemin de propagation suivant (5A), en fonction de valeurs représentatives de rapport signal à bruit respectivement mesurées pour lesdits chemins de propagation courant et suivant. Le procédé est caractérisé en ce que: - le canal de communication suivant est réservé pour la communication, et par l'étape de - commutation, dans ladite seconde station (3), de ladite communication à partir du canal courant vers ledit canal suivant en réponse à un défaut de réception de ladite communication dans le canal courant.
Patent CA-2209539-C (CA)
Inventor: ZINGG JURG
IPC: C09K15/20
Filed: 1997-07-03
Granted: 2006-12-19
Abstract: Organic materials which possess outstanding stability to oxidative, thermal or light-induced degradation comprise as stabilizers at least one compound of the benzofuran-2-one type and at least one compound of the sterically hindered amine type.
Patent CA-2213365-C (CA)
Title: Method and system for call screening
Inventor: DEE HEATHER C
IPC: H04M3/54
Filed: 1997-08-19
Granted: 2000-06-27
Abstract: A method and system are disclosed for providing call screening in conjunction with a variety of network-based call services. An exemplary method for providing a called party at a called party station with call screening includes: (a) forwarding a call to the called party station (CPS) to a voice mailbox so that a caller can leave a message for the called party; (b) initiating a simplex call to the CPS; and (c) bridging the call forwarded to the voice mailbox and the simplex call to the CPS so that the called party can hear the caller leaving a message for the CPS; (d) initiating a duplex call to the CPS in response to signaling received from the CPS; and (e) bridging the call forwarded to the voice mailbox and the duplex call so that the caller and the called party are in communication with one another. In one embodiment of the present invention, the step of initiating a simplex call includes the step of delivering a distinctive ring to the CPS indicating that the caller is leaving a message for the CPS. In another embodiment of the present invention, the step ofinitiating a simplex call includes the step of transmitting a call waiting indicator to the CPS. In yet another embodiment of the invention, the step of initiating a simplex call includes the step of transmitting a signal to the CPS indicating that the calling party station will pay for cellular charges associated with the call.
Patent CA-2214492-C (CA)
Inventor: MCGARY R KERN
IPC: A61M5/50
Filed: 1997-09-12
Granted: 2008-02-26
Abstract: A non-reusable retractable safety syringe is provided which has a hollow plunger and a seal member carried thereon. The provision of the plunger and the seal relative to the barrel permits the plunger, with sufficient strength, to carry applied pressure through the device during injection of a medicinal or other fluid into a patient, and yet permit the seal disposed at one end of the plunger to have maximum sealing integrity between the plunger and a cylindrical barrel disposed around the exterior of the plunger, to abate leakage of the liquid in a chamber within the barrel, as the plunger is manipulated from an expanded position to an expended position and thereafter to a third, or collapsed position. Designs for securing the seal relative to the plunger are disclosed. The syringe may be used to insert and/or withdraw fluid relative to the patient.
Patent CA-2232105-C (CA)
Inventor: KREMER BERNARD
IPC: G01C15/00
Filed: 1998-03-13
Granted: 2008-08-26
Abstract: An airborne electromagnetic surveying system including one or several buoyant elements, particularly adapted to be towed by a helicopter. A transmitter assembly consists of a transmitting loop, a transmitter and a power supply. A receiver assembly consisting of a buoyant element carrying at least one receiving coil is towed behind the transmitter assembly whereby the buoyant element stabilizes the motion of the transmitter assembly during towing by an aircraft. This buoyant element contributes a large part to the overall performance of the system allowing for a large separation, hence use of increased radiated power as well as a stable geometry.
Patent CA-2236280-C (CA)
Title: Retractable receptacle for furniture
Inventor: MCCARTHY DAVID G
IPC: A47B95/00
Filed: 1998-04-28
Granted: 2003-04-15
Abstract: A  receptacle   for  coupling  electrical   equipment  and communications  equipment  to  electrical  and  communications transmission lines  is retractably mounted in an opening in a furniture unit, and in particular, the top surface of an office conference table.  The receptacle is vertically displaceable so that it is elevated above the top surface of the furniture unit in which it is mounted to provide access for coupling electrical equipment such as lap top computers, or communications equipment such as telephones and fax machines, which are supported on the top surface of the furniture unit.  When the equipment is coupled to the elevated receptacle unit,  the unit  is then displaced downwardly into the furniture such that the top surface of the receptacle unit is planar with the top surface of the furniture unit in its fully retracted position.  A gap defined between the outer surface of the top surface of the receptacle unit and the inner surface of the opening in the furniture unit permits wires and cables to extend through the gap and remain connected to the receptacle  unit  when  the  receptacle  unit  is  in  its  fully retracted position in the furniture unit.   The receptacle unit may be displaced into its elevated position to disconnect lines coupled to it or to connect additional lines.  In this manner, portable electrical and communications equipment can be supported or stored on furniture units,  such as conference tables,  and actuated when needed by coupling the equipment to the receptacle in the furniture unit.
Patent CA-2240284-C (CA)
Title: Improved formulation for fertilizer additive concentrate
Inventor: LINDSAY ALEXANDER D
IPC: C05G3/90
Filed: 1996-12-10
Granted: 2005-01-18
Abstract: Improved solvent systems for the formulation of N-alkyl thiophosphoric triamide urease inhibitors. These formulations enable the preparation of stable concentrated solutions of N-alkyl thiophosphoric triamides for storage, transportation, and eventual impregnation onto solid urea containing fertilizers and incorporation into liquid urea containing fertilizer compositions. These formulations are comprised primarily of a solvent selected from the group consisting of glycols and glycol derivatives. Optionally, in addition to the glycol base solvent, the formulations can contain a co-solvent selected from the group consisting of liquid amides, 2-pyrrolidone and N-alkyl 2-pyrrolidones, and/or a nonionic surfactant selected from the group consisting of alkylaryl polyether alcohols. The presence of the co-solvent and/or surfactant has been found to impart desirable properties to the formulations under certain conditions. N-alkyl thiophosphoric triamides have been known for some time to be effective inhibitors of the activity of urease enzymes, however, commercial use has been inhibited by the lack of an acceptable carrier. They are often thermally and hydrolytically unstable and difficult to handle. The use of the solvent systems offers many advantages including: (1) improved stability of the active ingredient urease inhibitor, (2) excellent solubility characteristics; (3) extremely low flammability and toxicity of the solvents; (4) excellent cold temperature storage and handling characteristics with the addition of the liquid amide co-solvent; and (5) good adsorption characteristics onto solid urea containing fertilizers and excellent miscibility with liquid urea containing fertilizer formulations.
Patent CA-2241622-C (CA)
Inventor: DULPHY-VIGOR VERONIQUE
IPC: G01F23/18
Filed: 1998-06-22
Granted: 2007-11-20
Abstract: The process for generating at least one warning signal relating to the level in a tank (3) for storing a product (4) comprises the following steps: - the storage level of the product in the tank, together with the values of the product quantity consumed during predefined time intervals are determined, - these values are placed in memory together with the associated measurement instants, - at other successive instants the values placed in memory of the product quantity consumed are used to calculate a value of the estimated quantity of product which will be consumed in the future, this estimated value is subtracted from the last measurement value so as to obtain an estimated value of the storage level at a future instant, this estimated value of the storage level is compared with a preset threshold, and a warning signal is generated if the estimated value is less than the preset threshold. Figure 1.
Patent CA-2243953-C (CA)
Inventor: BRALY JOSEPH M
IPC: A63B53/12
Filed: 1997-05-22
Granted: 2004-06-22
Abstract: A tubular blank (10) for producing golf club shafts comprises a butt section (12) having a uniform cross-sectional configuration along its length, a tip section (14) also having a uniform cross-sectional configuration along its length, and a tapered section (16) interconnecting the butt and tip sections. Metallurgically formed rifling (18) on the interior surface of the blank extends throughout the entirety of the butt, tip and tapered sections. The golf club shafts produced from these blanks have increased strength and stiffness which is a direct result of the interior rifling. A set of golf club shafts is produced from a group of these tubular blanks with each blank of the group having the same length and the same natural frequency. Predetermined portions are then selectively removed from the tip and butt sections.
Patent CA-2246361-C (CA)
Title: Automated balloon inflation device
Inventor: MCCAUL MICHAEL F
IPC: A63H27/10
Filed: 1997-01-31
Granted: 2005-10-25
Abstract: An automated balloon inflation device (200) which has a supply of pressurized gas (202), a nozzle (222) for receiving a balloon (224), and an actuator for closing a clamp (216) on the balloon and the nozzle (222) and subsequently supplying the gas (202) to the balloon (224) for the inflation thereof. A key-weight device (94) is employed for controlling the supply of gas to the nozzle and to prevent the loss of a balloon which is secured to the key-weight. The device is constructed so that any consumer may inflate a balloon. The device employs a connection block (205) with a series of conduits therein to interconnect the gas supply with the clamping mechanism (216) and the nozzle. The clamping mechanism (216) uses a piston (264) attached to a gear Q266) wherein the gears (270) rotate clamping jaws (274) onto the nozzle (222). A door trigger mechanism (256) is provided which only allows gas to flow to the nozzle and clamping mechanism when the door is closed.
Patent CA-2258329-C (CA)
Inventor: ESTRADA HERBERT
IPC: G01N29/032
Filed: 1999-01-20
Granted: 2006-03-21
Abstract: An apparatus for determining the viscosity of a fluid in a container (such as a pipe). The apparatus comprises a mechanism for transmitting a signal into a fluid in a container. The transmitting mechanism contacts the container and provides the signal to the fluid in the container. The apparatus comprises a mechanism for receiving the signal after the signal has passed through the fluid. The receiving mechanism contacts the container and receives the signal from the fluid in the container. The apparatus comprises a mechanism for determining the fluid in the container from the signal after the signal has passed through the fluid and determining the fluid viscosity from the amplitude and sound velocity. The determining mechanism is connected to the receiving mechanism. The method comprises the steps of transmitting a signal into fluid. Then there is the step of receiving the signal after it has passed through the fluid. Next there is the step of determining the attenuation of the signal as the signal has passed through the fluid. Then there is the step of finding the viscosity of the fluid in the container from the attenuation of the signal and transit time.
Patent CA-2261101-C (CA)
Title: Locking mechanism for an appliance door
Inventor: OSTDIEK STEPHEN D
IPC: D06F37/42
Filed: 1999-02-03
Granted: 2003-09-09
Abstract: A mechanism for locking an access door of an appliance includes a spring biased catch member preferably attached to the door and a latching housing insert fixed to a cabinet shell of the appliance. Upon closing the door, the catch member is caused to ride up a ramped retaining element mounted in a latching cavity, while simultaneously pivoting a first locking element between release and set positions. When the door is fully closed, the catch member drops behind the retaining element to releasably hold the door closed.      When it is desired to maintain the door in a securely locked position, a linear actuator is activated to shift a second locking element into engagement with the first locking element. Preferably, the first and second locking elements are engaged through a ratchet connection which enables continued rotation of the first locking element to only further lock the catch member in the latching cavity. Deactivation of the linear actuator enables opening of the door, preferably in a timed and controlled manner in accordance with a safety unlocking algorithm.
Patent CA-2270796-C (CA)
Title: Procede de controle ultrasonore en immersion de pieces a geometrie cylindrique
Inventor: FINK ALEXANDRE MATHIAS
IPC: G01N33/20
Filed: 1999-05-05
Granted: 2008-02-12
Abstract: Le procédé de contrôle ultrasonore en immersion de pièces à géométrie cylindrique consiste à utiliser un transducteur multi-éléments émettant des ondes ultrasonores focalisées dans la pièce, la focalisation étant réalisée selon deux modes différents au moyen d'un dispositif électronique de commande multivoies, les deux modes de focalisation, appelés respectivement mode de focalisation électronique et mode de focalisation par retournement temporel, étant sélectionnés en fonction de la profondeur de la zone d'analyse considérée. Le mode de focalisation par retournement temporel est choisi pour contrôler des zones centrales localisées aux profondeurs les plus importantes situées autour de l'axe longitudinal de la pièce cylindrique. Le mode focalisation électronique est choisi pour contrôler des zones intermédiaires localisées à des profondeurs situées entre les zones centrales et une zone périphérique de la pièce cylindrique.
Patent CA-2279848-C (CA)
Inventor: KHOKAR NANDAN
IPC: D03D25/00
Filed: 1997-03-03
Granted: 2006-05-09
Abstract: A woven 3D fabric material (12u) comprises multilayer axial warp yarns (6) and two orthogonal sets of weft (7 and 8) which interlace with the rows and the columns of the warp (6) respectively to provide integrity to the fabric which may additionally incorporate between the rows and the columns of the interlacing warp (6) sets of non-interlacing multi-directionally orientated yarns (6ps, 9c, 9a, 9b and 9d) in the fabric-length, -width, -thickness, and two diagonal directions respectively to improve the fabric's mechanical properties. The interlacing of the multilayer warp (6) and the two orthogonal sets of weft (7 and 8) is enabled by a dual-directional shedding means which forms sheds in the row-wise and the column wise directions of the multilayer warp. The produced woven 3D fabric material which may be cut into any desired shape without the risk of splitting up, may be wholly or in parts in technical applications.
Patent CA-2309892-C (CA)
Title: Fibre grating stabilized diode laser
Inventor: ROGERS GRANT
IPC: H01S5/40
Filed: 1995-06-28
Granted: 2001-03-20
Abstract: A fibre Bragg grating (34) is used to stabilize the intensity and frequency fluctuations of a diode laser (26). The diode laser is connected with an opto-mechanical apparatus to the fibre which contains the grating. The grating is formed in the guided-mode region of the optical fibre (32). The wavelength of maximum grating reflectivity is selected to lie near the maximum of the diode laser gain bandwidth. The output facet of the diode laser has a reflectivity approximately equal to or greater than that of the fibre Bragg grating, The magnitude and bandwidth of the grating reflectivity stabilizes the diode laser output without appreciably reducing the optical output power from the end of the fibre. The bandwidth of the optical spectrum of the diode laser is selected depending on the distance of the grating from the diode laser.
Patent CA-2312003-C (CA)
Inventor: SUZUKI MIOU
IPC: B32B5/02
Filed: 2000-06-20
Granted: 2005-07-26
Abstract: A flexible sheet 1 includes a plastic sheet 2 and a fibrous assembly 3 bonded to the lower surface of the sheet 2. The sheet 2 is formed with projections 20, ribbon-shaped regions 8, fine slits 9 defined between each pair of adjacent ribbon-shaped regions 8, 8, bridge-like regions 10, 10A, 10B connecting each pair of adjacent ribbon-shaped regions 8 and rising regions 12, 12A, 12B extending upward from edges of the ribbon-shaped regions 8. The fibrous assembly 3 are partially exposed within the respective fine slits 9.