baber/WOPTO huggingface dataset:
Patent CA-2275098-A1 (CA)
Inventor: HARAHUC LESIA
IPC: C22B15/00
Filed: 1999-06-16
Abstract: Thiobacillus ferrooxidans and Thiobacillus thiooxidans play major roles in bacterial leaching of metals from ores and tailings through their oxidative action on ferrous iron (Fe2+) and sulfide or sulfur (S0). We have studied the effects of various inhibitors such as cyanide, azide and anions (phosphate, nitrate, chloride) on Fe2+ or S0 oxidation by resting cells, on Fe2+ or S0 as an energy source for growth and finally on leaching of Fe or Zn from a sample containing pyrite (FeS2) and sphalerite (ZnS). All of these inhibitors inhibited Fe2+ oxidation more strongly than S0 oxidation and generally stopped the growth on Fe2+ at lower concentrations than on S0. All three anions inhibited the leaching of Fe more strongly than Zn leaching, but potassium phosphate was the most selective. In the leaching experiments with T.  ferrooxidans and T. thiooxidans either singly or combined, phosphate at 10 - 100 mM reduced the Fe leaching almost completely (by 90 - over 95%) without affecting the Zn leaching (0 - 40%). Furthermore, the method can be used for recovery of other minerals from other sulfide ores.
Patent CA-2277450-A1 (CA)
Inventor: SHINTANI MASATOSHI
IPC: B65H37/00
Filed: 1999-07-06
Abstract: In a refill type coat film transfer tool for use in horizontal drawing, a small, simple and inexpensive tape cartridge is presented, in which the coat film transfer tape can be replaced easily, quickly and securely, and it can be held and used like a writing tool corresponding to the manner of holding a writing tool by the user. On a support board, a rotatable feed reel winding a coat film transfer tape thereon, a rotatable take-up reel for recovering the coat film transfer tape after use, and a coat film transfer head for pressing the coat film transfer tape to a transfer area are provided. The support board rotatably supports the opposite side ends of the rotary shafts of both reels detachably and rotatably supported on the rotary support shafts of the case of the coat film transfer tool, and the coat film transfer head is supported on the head holding portion of the support board rotatably about the head axial center.
Patent CA-2278263-A1 (CA)
Title: Improved rod guide
Inventor: WHITE BRETT
IPC: E21B17/10
Filed: 1999-07-20
Abstract: A rod guide for a cylindrical rod. The rod guide includes a cylindrical body surrounding and coaxial with the rod. A first pair of opposed fins extends from the cylindrical body, each first fin having a pair of planar sidewalk parallel to each other and parallel to the diameter of the cylindrical body. A second pair of opposed fins, each has a pair of radiused sidewalk wherein each second fin extends outward radially from the cylindrical body to a terminal end with the fin widest at its terminal end.
Patent CA-2278430-A1 (CA)
Title: Lubricants containing ashless antiwear-dispersant additive having viscosity index improver credit
Inventor: BARANSKI JOHN R
IPC: C10M151/04
Filed: 1998-01-23
Abstract: A graft copolymer is disclosed. The copolymer is prepared by the interpolymerization of a mixture of monomers comprising ethylene, a C3 to C12 alpha monoolefin, and a polyene being a member selected from the group consisting of non-conjugated dienes and trienes.  Grafted to the copolymer is a 2-mercapto-1,3,4,-triadiazole moiety.  Lubricating oil additives and lubricating oils comprising the graft copolymer are also disclosed.
Patent CA-2282154-A1 (CA)
Inventor: BARBEAU JEAN
IPC: E06B3/40
Filed: 1999-09-10
Abstract: A double pivotable door, particularly for use with modular office partitions is disclosed. The double pivotable door includes a frame, which is mounted to a partition by at least one hinge having a first axis of rotation. The frame include a door which is mounted to the frame and can rotate about a second axis of rotation, where the second axis of rotation is parallel but spaced from the first axis of rotation. The door can thus be mounted to partitions where there is limited space, and can rotate about the first axis, as a typical door, or rotate about the first and second axes simultaneously, thereby reducing by approximately half the clearance required for opening and closing the door. Preferably, the door includes a mechanism to prevent the door from pivoting about the second axis. Also preferably, the handle for the door is integral therewith.
Patent CA-2284770-A1 (CA)
Title: Flame retardant resin compositions
Inventor: KASOWSKI ROBERT VALENTINE
IPC: C08L77/00
Filed: 1998-04-07
Abstract: This invention relates to flame retardants for synthetic resin compositions.  It is a composition comprising: (A) 30 to 70 wt. percent of a synthetic resin which is, (1) 30 to 70 wt. percent of a first resin which is polypropylene, polycarbonate, polyphenylene oxide or polystyrene, or copolymers of polystyrene and maleic anhydride, and (2) 30 to 70 wt. percent of a second resin which is polyethylene terephthalate, or nylon 6,6, or blends or mixtures thereof, wherein the wt.  percentages of (A)(I) and (A)(2) total 100 % as between (A)(1) and (A)(2); (B) a Hame retardant selected from the group consisting of (1) 20 to 45 wt. percent of melamine pyrophosphate, or (2) 15 to 30 wt. percent of melamine pyrophosphate and up to 10 wt. percent charring catalyst; or (3) 15 to 30 wt. percent of melamine pyrophosphate, up to 10 wt. percent charring catalyst, and up to 10 wt. percent of a char former, or (4) 20 to 40 wt. percent melamine pyrophosphate and up to 5 wt. percent zinc borate, and (C) up to 40 wt. percent reinforcing agent; wherein all percents by wt. are based on the total wt. of (A)+(B)+(C) except for the relationship between (A)(1) and (A)(2) which is set forth above.
Patent CA-2284960-A1 (CA)
Title: Easy to handle electrochemical sensor in the shape of a strip
Inventor: JAEGER GERARD
IPC: G01N27/30
Filed: 1999-10-04
Abstract: Electrochemical sensor, in the shape of a strip of small dimensions including a thin plastic substrate (1) carrying, over all or part of its length, at least two current collectors (4, 5) separated by an electrically insulating space (3), said substrate (1) and said collectors (4, 5) being covered with a plastic coating (2), in which two windows (8, 9) are cut allowing collector portions (4, 5) to appear to form a connection window (8) at one end and a measuring window (9) close to the other end, leaving a distal portion (10) of the strip free beyond the measuring window, wherein said distal portion (10) includes, on the side of the strip where the windows (8, 9) are arranged, at least one button (12) obtained by hot or cold deformation (11) of the external face of the substrate (1), said button allowing said sensor to be slid to the edge of a flat surface to be grasped.
Patent CA-2285077-A1 (CA)
Title: Security bar assembly
Inventor: MCILWRAITH LON W
IPC: E06B9/06
Filed: 1998-03-18
Abstract: An extendable security bar assembly (10). The assembly (10) is for placing over or in an opening (17) and has a plurality of bars (12) extending between two channels (16), the two channels (16) positioned on opposing faces of the opening (17) with the bars (12) slidable within the channels (16). The bars (12) are connected at each end within the channels (16) to a transporting mechanism (20) in each channel (16) coordinated to slide the bars (12) across the opening (17). A drive system is provided for the transporting mechanism (30), and guides (44, 46) at ends of the channels guide (16) and retain the bars (12) in a storage area (24) substantially adjacent the opening (17).
Patent CA-2287374-A1 (CA)
Title: Apparatus for melt spinning feedstock material having a flow restricting ring
Inventor: ABDI MESFIN
IPC: A23G3/10
Filed: 1998-05-04
Abstract: A spinner head provides (10) for the production of high fat content floss. The spinner head includes a base (12) and a cover (16) spaced from the base. A  plurality of discrete spaced apart elongate heating elements (20) are positioned between the base (12) and the cover (16) and define a chamber (25) for accommodating feedstock material therein. The chamber (25) is spun and the feedstock material is heated and is expelled through the spaces (24) between the heating elements (20). Feedstock engagement surfaces are positioned in alignment with each of the spaces (24) between the heating elements (20) so as to engage the expelled feedstock to alter the direction of travel of the expelled product.
Patent CA-2290869-A1 (CA)
Title: Methode de remplissage gazeux de lignes de transport de courant electrique a isolation gazeuse et procede de fabrication de lignes integrant une telle methode de remplissage
Inventor: LARQUET CHRISTIAN
IPC: H01B13/00
Filed: 1999-11-26
Abstract: La présente invention concerne une méthode de remplissage gazeux de lignes0 (20) de transport de courant électrique dites à isolation gazeuse, à l'aide d'un mélange gazeux d'isolation, ligne comportant une gaine tubulaire extérieure, au moins un conducteur interne à la gaine, et coaxial avec cette gaine, qui comporte la mise en oeuvre des étapes suivantes, appliquées à l'espace situé entre le ou les conducteurs internes et la gaine extérieure: a) l'application au dit espace d'au moins un cycle de purge comportant: - une étape de pompage jusqu'à un premier niveau de vide; - une étape de purge par introduction d'un gaz de purge; b) l'application au dit espace d'un cycle de remplissage comportant: - une étape de pompage jusqu'à un second niveau de vide; - une étape de remplissage à l'aide du dit gaz d'isolation. Application à la fabrication de lignes de transport de courant électrique dites à isolation gazeuse.
Patent CA-2291402-A1 (CA)
Title: Stress relieved call grid array package
Inventor: JOHNSON ERIC A
IPC: H01L23/498
Filed: 1999-12-02
Abstract: A method and structure for reducing thermally induced strains on the solder joints that couple a ball grid array (BGA) module to a circuit card, so as to improve the fatigue life of the BGA module. The thermally induced strains arise from a mismatch in thermal expansion coefficient between the dielectric substrate of the BGA module and the dielectric board of the circuit card. The method generates void annular regions around portions of the BGA dielectric substrate to which the BGA solder balls are to be attached and/or around portions of the circuit card dielectric material to which the BGA module is to be attached. This results in the formation of dielectric islands or peninsulas that bound the solder balls of the BGA module after installation on the circuit card. The dielectric islands or peninsulas thus formed serve to increase the effective height over which the differential expansion is accommodated, thereby reducing the strains throughout the solder joints.   Additionally, the void annular regions provide space for the deformation of the dielectric islands or peninsulas, thereby increasing their compliance and transferring strain from the solder joints to the dielectric islands or peninsulas.
Patent CA-2292080-A1 (CA)
Inventor: LOYD JOHN C
IPC: B41J2/175
Filed: 1999-12-13
Abstract: A system and method are provided for protecting the vacuum pump of an ink jet printer system from the harmful effects of condensation in the vacuum lines, and from the harmful effects of moisture and water in the vacuum lines. This is accomplished by suppressing the condensation and drying the vacuum line walls.
Patent CA-2292800-A1 (CA)
Title: Capacitive sensor for measuring a liquid level and reservoir equipped therewith
Inventor: DELATTE DANIEL
IPC: G01F23/26
Filed: 1999-04-01
Abstract: The invention concerns a capacitive sensor for measuring a liquid level in a reservoir (1) comprising a body (7) for mounting the sensor and a first capacitor plate (8) borne by the body and designed to form with a second capacitor plate (41) a capacitor designed to be connected to potential difference source, which capacitor plates are designed to be partially immersed in the liquid defining between them a space for receiving the liquid. The first capacitor plate (8) is mounted adjustable on the body between a high measuring position and a low measuring position. The invention is applicable to nitrogen storage in liquid/vapour equilibrium for preserving biological products.
Patent CA-2294083-A1 (CA)
Title: Balance beam automatically adjusting torques translator
Inventor: HUNT GROVER C JR
IPC: F16H3/74
Filed: 1997-06-13
Abstract: This smoothly automatic changing ratios gear mechanism for use in devices as small as toys and as large as the heaviest industrial machines is an arrangement of planetary gear sets (68, 72) which provide divergent ratio gear tracks (38, 40) driven by an arrangement of components (32) for dynamically positioning virtual fulcrum points (48) along virtual balance beams (54) thus automatically realizing a multiplicity of gear ratios.      The gear ratio changes result from the relationship of the amplitude of force driving the system acting against the variable bias of spring and centrifugal forces that tend to keep the fulcrums (22) positioned to affect high RPM output. The gear tracks are arranged as minor images of each other and in a manner such that the ring gear (56) of an input planetary gear set (68) is tied to the sun gear (70) of an output planetary gear set (72) and vice versa thus forming divergent ratio gear tracks (38, 40). A low RPM output results from driving the input ring gear (56) and a high RPM output results from driving the input sun gear (58) with virtual fulcrum points (48) impinging upon virtual balance beams (54) so that gear ratios from the highest to the lowest and all the continuum between are possible. Using a sun gear to ring gear size ratio of 1/5 provides an output gear ratio ranging from 1/1 to 36/1.
Patent CA-2294943-A1 (CA)
Title: Polymerisation catalysts
Inventor: GARCIA ELIANE
IPC: C08F10/00
Filed: 1998-06-24
Abstract: Transition metal complexes suitable for use for the polymerisation of olefins comprise unsaturated groups having Lewis Base functionality. Preferred groups are dienes having dialkylamino functionality. The complexes may suitably be supported by the use of the functionalised dienes to give transition metal complexes which in the presence of activators are particularly suitable for gas phase processes.
Patent CA-2296891-A1 (CA)
Inventor: GOULET MIKE THOMAS
IPC: C08G69/48
Filed: 2000-01-24
Abstract: Modified condensation polymers containing azetidinium groups, such as polyamide epichlorohydrin (PAE) resins, can be combined with amphiphilic hydrocarbons in a single molecule to provide several potential benefits, depending upon the specific combination employed, including: (a) wet strength aids that impart softness; (b) softeners that do not reduce wet strength: (c) wet strength with improved wet/dry strength ratio;  (d) surface feel modifiers with reduced tinting and sloughing; (e) wet strength aids with controlled absorbency; (f) wet strength aids with controlled decay rate after wetting;  and (g) Yankee dryer additives that provide surface protection and adhesion with controlled release properties.
Patent CA-2296952-A1 (CA)
Title: Receptacle grounding wire
Inventor: TODD JAMES H JR
IPC: H01R13/74
Filed: 2000-01-26
Abstract: A wiring device such as a receptacle is adapted to be mounted to a wall box and includes a spring wire to ensure a satisfactory ground connection between the device, the wall box, and the screws which mount the device to the wall box. The wiring device includes a spring wire extending across the screw receiving aperture in the mounting strap of the device. The spring wire is retained in openings in a pair of attachment members adjacent the screw receiving aperture.
Patent CA-2297122-A1 (CA)
Inventor: MCGUCKIN JAMES F JR
IPC: A61M25/00
Filed: 1998-07-23
Abstract: A stationary central tunnel dialysis catheter includes a planar axially elongated sinuous tubular member having a plurality of axially extending lumens formed therein with at least two of said lumens each having at least one aperture for through passage of fluid during dialysis with said apertures being axially displaced from one another along said tubular member.
Patent CA-2303234-A1 (CA)
Inventor: PATHAK JAGDISH
IPC: H03K17/22
Filed: 1998-11-20
Abstract: A power-on-reset circuit includes a first charging stage (162) for building up a charge during power up. The rising voltage of the first charging stage is sensed and used to control means (122) for charging up a second charging stage (164). When the second charging stage reaches a first voltage level, a circuit (130) is tripped to pull the potential of the first to ground. The grounding of the first charging stage (162) is fed back to the charging means (122) which shuts off its power burning components and maintains the first voltage level at the second charging stage (164).
Patent CA-2305158-A1 (CA)
Title: Systeme de commande centralise monte dans un vehicule de police
Inventor: HUBENAK GREG
IPC: B60Q1/26
Filed: 1998-08-18
Abstract: L'invention concerne un système de commande centralisé (10) qui permet une commande intuitive et aisée de nombreux sous-systèmes (24, 26-30) associés à une voiture de police (12) ou à un autre véhicule de secours et réduit l'encombrement de l'habitacle que l'on connaît avec les systèmes de commande actuels. Un seul dispositif d'interface utilisateur (18) est associé à un dispositif de commande central (22) pouvant recevoir des instructions d'entrée et émettre des instructions de commande de dispositif à l'intention d'une pluralité de dispositifs ou de sous-systèmes (24, 26-30) commandés. De préférence, le dispositif de commande central comprend un ordinateur numérique programmable. L'invention concerne également un système de réaction de secours qui coordonne et commande rapidement le fonctionnement d'une pluralité de sous-systèmes de secours (24, 26-30) associés au véhicule (12) selon un programme prédéterminé de fonctionnement spécifique pour les dispositifs. Dans un mode de réalisation préféré, le dispositif de commande (22) reçoit une seule instruction d'entrée et, en réaction, fournit des instructions de commande de dispositifs spécifiques à plusieurs dispositifs individuels commandés, de façon relativement simultanée. L'invention concerne en outre une structure de commande de dispositifs hiérarchique qui permet la commande individuelle d'entités faisant partie de chacun des sous-systèmes commandés. D'autres aspects décrits comprennent l'entrée de données améliorée ainsi que l'entrée de données à distance et la communication destinées à permettre à des officiers de police ou à d'autres personnes participant à une intervention de secours d'entrer des données ou des informations dans une unité informatique (44) tenue à la main, lorsque ces officiers ou ces personnes se trouvent à l'extérieur du véhicule.
Patent CA-2305188-A1 (CA)
Inventor: KNOBLE JOHN L
IPC: B22D11/16
Filed: 1999-08-04
Abstract: An improved mold and process for continuous casting involves the use of a mold surface that is fabricated from a material, such as diamond, that is nonmetallic, an efficient conductor of heat and that is more degradation-resistant than the conventional materials and coatings that are used on mold surfaces. In one embodiment, the nonmetallic material is bonded to a conventional mold liner. In a second embodiment, the entire mold wall can be fabricated from the nonmetallic material. In another aspect of the invention, since materials such as diamond are transparent in the infrared range, the temperature of the outer shell of the casting can be monitored through the nonmetallic material without interfering with the casting process, and this information can be used to control one or more variables in the casting process.
Patent CA-2305679-A1 (CA)
Inventor: DECICCO CARL P
IPC: A61K31/451
Filed: 1998-10-02
Abstract: The present application describes novel lactams and derivatives thereof of formula (I), or pharmaceutically acceptable salt forms thereof, wherein ring B  is a 4-8 membered cyclic amide containing from 0-3 additional heteroatoms selected from N, O, and S, which are useful as metalloprotease inhibitors.
Patent CA-2307392-A1 (CA)
Title: Stable chiral aminobutyronitrile compositions
Inventor: WEPPLO PETER JOHN
IPC: A01N37/44
Filed: 2000-05-01
Abstract: There is provided a stable optically active composition comprising up to about 65% by weight of (R)2-amino-2,3-dimethylbutyronitrile and a substantially water-free non-polar solvent. Said composition is useful in the manufacture of agriculturally active agents.
Patent CA-2308049-A1 (CA)
Inventor: HOAR DAVID
IPC: C12N15/23
Filed: 2000-04-07
Abstract: In one aspect, the invention provides a method of diagnosis. The diagnostic method may include steps of identifying a patient at risk of an arthritis, the patient having an interferon gamma gene. The patient may be tested to characterize a polymorphism in a first intron of the interferon gamma gene.  The polymorphism may comprise a variable length dinucleotide repeat region within the first intron, and the dinucleotide repeat region may be located at least partly between nucleotides 1349 and 1373 in the interferon, gamma gene. The method may be carried out so as to be capable of identifying alleles such as the 126 by allele and the 122 by allele, as further described herein. The polymorphisms may be distinguished based on a difference in the number of CA repeats in a portion of the first intron of the interferon gamma gene. The invention may also comprise testing a patient for a polymorphism is an HLA protein (or gene), such as the HLA-DRB1 protein.
Patent CA-2308580-A1 (CA)
Title: Method for bleaching mechanical pulp
Inventor: WAN JEFFREY K-S
IPC: D21C9/16
Filed: 1999-03-22
Abstract: A method for bleaching unbleached softwood or hardwood pulps using hydrogen peroxide without added alkali for activation is described. The aqueous hydrogen peroxide solution contains an alkaline earth metal carbonate, preferably magnesium carbonate and can be used at elevated temperatures. Bleached hardwood or softwood mechanical pulps with high brightness, low yellowness (b*) and reduced reversion properties are produced.
Patent CA-2309189-A1 (CA)
Title: Method for extruding thermoplastic resins
Inventor: HAUENSTEIN DALE E
IPC: B29C48/30
Filed: 1998-12-17
Abstract: The present invention relates to a method for processing a thermoplastic resin composition by extruding the composition through a nickel die to provide an extrudate having a low degree of surface roughness, said composition comprising (A) 100 parts by weight of a thermoplastic resin; (B) 0.01 to 1 part by weight of a hydroxy-functional diorganopolysiloxane having a number average molecular weight of at least 10,000; and (C) 0.001 to 1 part by weight of an organophosphorous compound.
Patent CA-2311122-A1 (CA)
Title: Selected c10 perfluorinated hydrocarbons for liquid ventilation and artificial blood
Inventor: CLARK LELAND C
IPC: A61P43/00
Filed: 1998-11-18
Abstract: Perfluorinated alkylcyclohexane and alkyl cyclopentane derivatives of the empirical formula C10F20 boil at atmospheric pressure in the range of 144-146 °C and are utilized as mediums for gas transport in liquid ventilation and in artificial blood. Compounds of the C10F20 formula which can exist only as a single stereoisomer are preferred as mediums for gas transport.