baber/WOPTO huggingface dataset:
Patent CA-2169746-C (CA)
Title: Method for key distribution using quantum cryptography
Inventor: PHOENIX SIMON JAMES DANIEL
IPC: H04B10/70
Filed: 1994-09-08
Granted: 1999-11-16
Abstract: In a communication system using quantum cryptography for the distribution of a key, two stations each independently modulate a single-photon signal. The single-photon signal is transmitted to the two stations from an external source, and passes through the stations in series. The signal subsequently passes onto a third station which detects the state of the signal, and compares it with the state of the signal as originally transmitted.  This third station communicates the results of the comparison to the two stations, and the two stations establish a shared secret key for the subsequent encryption of traffic between the stations. Both the source of the single-photon signal and the single-photon detector may be combined in a transmitter station (Alice).
Patent CA-2173973-C (CA)
Title: Subtilisin variants
Inventor: GRAYCAR THOMAS P
IPC: C12R1/125
Filed: 1994-10-13
Granted: 2009-10-06
Abstract: Novel carbonyl hydrolase variants derived from the DNA sequences of naturally-occuring or recombinant non-human carbonyl hydrolases are disclosed. The variant carbonyl hydrolases, in general, are obtained by in vitro modification of a precursor DNA sequence encoding the naturally-occurring or recombinant carbonyl hydrolase to generate the substitution of a plurality of amino acid residues in the amino acid sequence of a precursor carbonyl hydrolase. Such variant carbonyl hydrolases have properties which are different from those of the precursor hydrolase, such as altered proteolytic activity, altered stability, etc. The substituted amino acid residues correspond to positions +76 in combination with one or more of the folloqing residues +99, +101, +103, +104, +107, +123, +27, +105, +109, +126, +128, +135, +156, +166, +195, +197, +204, +206, +210, +216, +217, +218, +222, +260, +265 and/or +274 in Bacillus amyloliquefaciens subtilisin.
Patent CA-2175974-C (CA)
Title: 2-oxetanone sizing agents and their preparation and use
Inventor: BRUNGARDT CLEMENT L
IPC: G03G7/00
Filed: 1996-05-07
Granted: 2008-12-09
Abstract: A sizing composition for fine paper that is not solid at 35°C and comprises a mixture of 2-oxetanone compounds that are the reaction product of a mixture comprising about 10-85 mole % of saturated fatty acids and about 90-15 mole % of unsaturated fatty acids, and preparation and use thereof. Paper made with the sizing composition does not encounter machine feed problems in high-speed converting or reprographic operations.
Patent CA-2177194-C (CA)
Title: Polymer compositions for demulsifying crude oil
Inventor: BREEN PATRICK J
IPC: C10G33/04
Filed: 1996-05-23
Granted: 2001-08-07
Abstract: Polymer compositions made by reacting a polyol with an aromatic hydrocarbon containing only a single reactive functionality have been discovered to be useful demulsifiers for crude oil compositions.  The aromatic hydrocarbon should have at least one aryl group and only one functionality reactive with a hydroxyl.  The polyol may optionally be crosslinked prior to reaction with the aromatic hydrocarbon, and the crosslinking agent may be a diepoxide.
Patent CA-2178315-C (CA)
Inventor: TASCI M TAHSIN
IPC: G01V3/08
Filed: 1994-12-06
Granted: 2000-02-22
Abstract: Method and apparatus for hydrocarbon detection via eddy currents induced by large amplitude. long period, square waves includes a transmitter (16) connected to transmission lines (12) which, in turn are connected to grounded electrodes (20) When energized the transmitter emits large amplitude, long period square waves of current which induce secondary eddy currents in the subsurface measurable at the surface with a magnetometer or an induction coil. The magnetic field changes are received and recorded as time-varying voltages at each sounding site by a receiver (26) and movable data receiving station (28). Information on resistivity variations of the subsurface formations is deduced from the amplitude and shape of the measured magnetic field signals plotted as a function of time and depth after applying appropriate mathematical equations.
Patent CA-2178913-C (CA)
Title: Cage de roulement a billes metallique et monobloc
Inventor: ALLING RICHARD L
IPC: F16C43/06
Filed: 1995-01-17
Granted: 2005-06-28
Abstract: On soumet un anneau mince et plat à une opération de formage, afin de produire un anneau modifié comportant une partie pont entre des poches à billes adjacentes (14) dans leur forme initiale. Des butées mobiles (12) présentant une surface arrondie sont disposées dans les poches à billes dans leur forme initiale et la partie pont est soumise à un reformage, pour qu'un pont essentiellement plat soit crée entre des poches à billes adjacentes dans leur forme finale, lesquelles viennent se conformer sur plus de 180~ à la circonférence de la surface arrondie. Les butées mobiles (12) sont ensuite déplacées pour que les poches à billes dans leur forme finale ne se conforment pas sur plus de 180~ à la circonférence de la surface arrondie, pour qu'on puisse retirer plus facilement les butées mobiles (12) des poches à billes dans leur forme finale. Un procédé pour assembler un tel roulement à billes est également décrit.
Patent CA-2184100-C (CA)
Title: Analyseur de gaz d'expiration
Inventor: DRUCKER STEVEN
IPC: G01N21/3504
Filed: 1995-03-09
Granted: 2007-07-17
Abstract: La présente invention concerne un appareil et un procédé de mesure de la teneur en gaz carbonique des gaz expirés. L'appareil est un analyseur non dispersif de gaz (100) adapté en prolongement des voies respiratoires, et pouvant se connecter à n'importe quel ordinateur hôte. L'analyseur (100) se compose d'un carter (102) maintenant une cellule d'échantillonnage retenant les gaz expirés. Le carter contient en outre une source d'émission infrarouge (130) encastrée dans une substance amortissant les chocs, un organe permettant d'envoyer l'émission sous forme d'un faisceau à rayons parallèles au travers de la cellule d'échantillonnage, des organes (145) permettant de diviser le faisceau et de le diriger sur deux capteurs infrarouge (142, 146) permettant de mesurer la quantité d'absorption de gaz carbonique dans la cellule d'échantillonnage. L'analyseur est pourvu de deux servocommandes chauffantes (118, 152), l'une régulant la température de la fenêtre de la cellule d'échantillonnage de façon à empêcher la formation de condensation, l'autre régulant la température ambiante autour des capteurs (142, 146) afin de garantir une plus grande exactitude des mesures. Un étalonneur, logé dans le carter (102) de l'analyseur, mémorise et délivre des informations caractéristiques des paramètres de fonctionnement de l'analyseur (100).
Patent CA-2186858-C (CA)
Inventor: WARD ROBERT S
IPC: C12N11/08
Filed: 1995-03-30
Granted: 2009-06-16
Abstract: La présente invention concerne de nouvelles compositions polymères et leurs utilisations. Lesdites compositions polymères sont des polymères contenant des groupes terminaux tensioactifs et qui comprennent un polymère de base linéaire, lié par covalence à des groupes terminaux tensioactifs de nature et en quantité telles que la tension superficielle ou interfaciale desdits polymères diffère d'au moins 1 dyne/cm par rapport à la tension superficielle ou interfaciale d'un polymère par ailleurs identique mais ne contenant pas lesdits groupes terminaux tensioactifs liés par covalence. Les nouveaux polymères linéaires selon la présente invention conviennent particulièrement à la fabrication d'instruments médicaux, et notamment d'instruments médicaux à utiliser au contact de fluides biologiques tels que le sang, par exemple les cathéters et les coeurs artificiels.
Patent CA-2188956-C (CA)
Inventor: STUART THOMAS I
IPC: A01D7/04
Filed: 1996-10-28
Granted: 2003-05-13
Abstract: The rake has an elongate handle, a rake head element and a pivotal debris collection element. The rake head element has a plurality of tines and is attached to one end of elongate handle. The pivotal debris collection element is in the form of a grapple attached to and pivotable about a fulcrum axis attached to the rake head. A  cord is attached to the rake head at one end and to a grip slidingly arranged on the elongate handle at the other end. A spring urges the grapple towards an open position, where the grapple is pivoted away from the rake head tines. The rake uses pulleys to multiply the force which is applied to the grapple from the grip via the cord.
Patent CA-2189446-C (CA)
Title: Under felt inclined flat former to produce multilayer or monolayer sheet of paper
Inventor: CABRERA Y LOPEZ CARAM LUIS FER
IPC: D21F11/04
Filed: 1995-05-02
Granted: 2004-08-17
Abstract: The present invention refers to an under felt inclined flat former for maki ng multilayer or monolayer sheets of paper. The forming unit is supported on corresponding rigid supports and is provided with a roll system on which the forming unit rests when the supports are removed, in such a manner that the selected forming unit can be removed from the production line for cleaning o r maintenance purposes, without interrupting the operation of the former equipment. The paper sheet so formed has superior characteristics to that of a sheet made in a fourdrinier manufacturing table. Unlike prior art equipment, the present invention provides controls for fiber orientation. In addition, the present invention discloses a flow head box with a step diffuser. The step diffuser maintains the fibers in a state of complete dispersion. Thus, the advantages of using a step diffuser in combination with activity induction can eliminate streaks. Further, the present invention provides for an adjustable tensile ratio. T he tensile ratio can be controlled by adjusting the fiber orientation while maintaining even distribution of fiber.
Patent CA-2195554-C (CA)
Inventor: EULDERINK FRITS
IPC: C01B3/36
Filed: 1995-07-18
Granted: 2007-04-10
Abstract: A process for the manufacture of synthesis gas by reacting oxygen-containing gas, applied as oxidiser and gaseous hydrocarbon-containing fuel in a reaction zone of a non-catalytic gas generator comprising the step s of injecting the said fuel and the said oxidiser into the reaction zone through a multi-orifice (co-annular) burner comprising arrangement of n separate passages or channels coaxial with the Longitudinal axis of said burner, wherein n is an integer .gtoreq. 2 (2, 3, 4, 5...) wherein the (n-1)th passage is the inner passage with respect to the n th passage, measured from the longitudinal axis of the said burner, an d wherein geseous hydrocarbon-containing fuel and, optionally, a moderator is passed through one or more of the passages, but at least throug h the n th (outer) passage whereby at least one passage remains; oxidiser and, optionally, a moderator, is passed through one or more of the remaining passages, but at least through the (n-1)th, passage. In any two adjacent passages in which oxidiser is passed through the one passag e, and gaseous hydrocarbon-containing fuel is passed through the other passage, the said oxidiser has a higher velocity than said hydrocarbon-containing fuel.
Patent CA-2196761-C (CA)
Inventor: HARRIS JOHN BERNARD
IPC: C11B15/00
Filed: 1995-07-28
Granted: 2001-10-16
Abstract: Un fractionnement à l'étape pseudostable d'une graisse polymorphe, donnant un produit se présentant sous forme cristalline cinétiquement stable, est effectué de telle manière qu'une valeur  sigma  est maintenue au-dessous de 0,5 selon la formule (I) dans laquelle Sc est le pourcentage de solides dans le cristallisoir à la température de cristallisation, et SE est le pourcentage de solides après stabilisation pendant 48 heures à la température de sortie du cristallisoir.
Patent CA-2199671-C (CA)
Title: Wear resistant excavating apparatus
Inventor: RUVANG JOHN A
IPC: E02F9/28
Filed: 1997-03-11
Granted: 2000-05-02
Abstract: A wear resistant excavating apparatus provides reduced wear, resilient compensation for such wear, reduced time required for installation, maintenance, and repair, and reduced hazards of operation.  In a preferred embodiment, a wear resistant excavating apparatus has a lip which penetrates the earth, a structure which overlaps the lip, a fastener which biases the overlapping structure to contact the lip, and a compression member which resiliently maintains the overlapping structure in contact with the lip.
Patent CA-2202700-C (CA)
Inventor: MANGLA RAJ K
IPC: B65D43/02
Filed: 1997-04-15
Granted: 2000-11-14
Abstract: In a plastic food container including a lid and a base, a latching mechanism includes a first continuous rim along a periphery of the lid and a second continuous rim along a periphery of the base. The first rim includes an inner female member, a central male member, and an outer latching member. The central male member encompasses and is integrally connected to the inner female member, and the outer latching member encompasses and projects laterally outwardly from the central male member. The second rim is adapted to latch with the first rim. The second rim includes an inner male member and an outer female member. The outer female member encompasses and is integrally connected to the inner male member. The outer female member includes an outer peripheral wall forming a plurality of spaced inwardly-projecting tabs.
Patent CA-2203583-C (CA)
Inventor: FLOEGEL KARL
IPC: G10K13/00
Filed: 1997-04-24
Granted: 2000-02-08
Abstract: A sound or ultrasound sensor is provided for transmitting and/or receiving sound or ultrasound, which is mechanically robust and chemically resistant and which has an adjustable emission characteristic, for example having a preferably small beam angle, having an emitting element (3) which has a flat front surface (34), and having a transducer element (1), the transducer element (1) causing the front surface (34) to oscillate on the basis of an excitation frequency, such that the entire front surface (34) carries out virtually in-phase deflections with virtually equal amplitude parallel to the normal to the front surface (34), and in which sensor concentric webs (32) are arranged on the front surface, there being a concentric gap (33) in each case between two adjacent webs (32), and a disk (5) sealing the sound or ultrasound sensor flush at the front, which disk is firmly connected to the webs (32) and has segments which are not connected to the webs (32) and are used as membranes (51).
Patent CA-2203770-C (CA)
Title: Method for inhibiting plant disease
Inventor: STOLLER JERRY HERMAN
IPC: C05G5/23
Filed: 1995-10-10
Granted: 2007-12-11
Abstract: The present invention is directed to a method of inhibiting the growth of disease organisms on and in plants by directly applying an aqueous solution comprising urea and at least one water-soluble salt of a divalent cation and a monovalent anion to the seeds, stems, bark, leaves, seed heads or sub-surface root zones of said plants. The weight percent ratio of urea to divalent cation in these solutions should be from about 0.25-10.0 to 1.0. Preferred divalent cations include those of the alkaline earth metals and the transition metals. Most preferred are calcium, magnesium, zinc, manganese, copper, iron, cobalt, nickel and mixtures thereof. Preferred anions include nitrate. chloride, bromide and mixtures thereof. In more preferred solutions, the ratio of urea to divalent cation is from about 2.0-7.0 to 1.0. Particularly preferred solutions include calcium chloride as the water-soluble salt. Optionally, a second water-soluble salt of a divalent cation and a monovalent anion may be included.
Patent CA-2204689-C (CA)
Inventor: SCHWEDLER NORBERT
IPC: F23N5/12
Filed: 1997-05-07
Granted: 2003-09-09
Abstract: In a process for operating a gas blower burner, a control circuit detects an ionization signal Ui derived from an ionization electrode, and it adjusts the gas-to-air ratio to a lambda set point >1, to which a set point Uis of the ionization signal corresponds. To guarantee low-emission combustion in different operating states, a range of control of the ionization signal Ui is set, whose upper limit value Uio is smaller than the maximum of the ionization signal Ui, and whose lower limit value Uiu is above the value that guarantees low-emission operation. A switch-off signal is generated for the burner if the ionization signal Ui leaves the permissible range of control RB for longer than a preset period of time. If the value is lower than the lower limit value Uiu of the ionization signal Ui and when the value is lower than the set point Uis at a lambda value < 1, the control circuit increases the gas volume flow to an end value, and another switch-off signal is generated for the burner when this end value is reached.
Patent CA-2207038-C (CA)
Inventor: SORAKER PAL
IPC: C07C5/48
Filed: 1995-12-18
Granted: 2002-02-12
Abstract: L'invention porte sur un réacteur à déshydrogénation catalytique d'hydrocarbures, susceptibles de subir cette modification, notamment d'hydrocarbures comportant trois et/ou quatre atomes de carbone, dans un courant contenant des hydrocarbures, avec oxydation sélective de l'hydrogène. Sont reliées dans le réacteur, en série et dans le sens de passage du courant contenant les hydrocarbures, les zones suivantes: une première zone de catalyse (2), une zone d'admixtion d'oxygène (3) pourvue de moyens (5) permettant une alimentation distincte de gaz contenant de l'oxygène dans le courant contenant les hydrocarbures ainsi qu'une seconde zone de catalyse (4). La zone d'admixtion d'oxygène (3) est dotée d'une section transversale, dans le sens de passage du courant contenant les hydrocarbures, d'une taille comprise entre 0, 5 % et 75 % de celle de chacune des deux zones de catalyse (2, 4), afin d'avoir une vitesse de passage, dans la zone d'admixtion de l'oxygène (3), supérieure à celle observée dans les zones de catalyse. De par leur conception, les moyens d'alimentation en gaz contenant de l'oxygène sont en mesure d'introduire celui-ci à une vitesse s'élevant à au moins 1 m/s et pouvant être jusqu'à 200 fois supérieure à la vitesse de passage du courant contenant les hydrocarbures dans la zone d'admixtion de l'oxygène (3). Cette dernière est dépourvue de catalyseur, tout au moins, dans la région contiguë aux moyens (5) d'alimentation en oxygène.
Patent CA-2212033-C (CA)
Title: Procede de preparation de milieux de croissance a cellules ouvertes, et milieux de croissance
Inventor: VAN ZANTEN EVERT
IPC: A01G9/00
Filed: 1996-02-13
Granted: 2006-05-09
Abstract: Un procédé permet de produire des milieux de croissance hydrophiles, des mottes de préférence, à caractéristiques améliorées et avec une quantité minimum d'agent d'adhérence. Il consiste à former une masse faisant ressort, d'un seul tenant, à dimensions stables, cohésive et homogène, en mettant un agrégat en contact avec un prépolymère d'uréthane hydrophile et de l'eau. Lors de la polymérisation, ce prépolymère se lie au matériau de l'agrégat. Le mélange de l'eau et du prépolymère constituant ce dernier intervient dans des conditions spécifiques soigneusement maîtrisées, ce qui permet d'utiliser avec ce procédé moins de prépolymère pour obtenir une solidité donnée et un volume d'air stable.
Patent CA-2215396-C (CA)
Title: A cleaning device and cleaning method
Inventor: FRITSCH ROXANNE YVONNE
IPC: G11B7/12
Filed: 1996-03-14
Granted: 2006-10-10
Abstract: A cleaning device (1) for cleaning a lens (2) of a laser head (3) of a compact disc player comprises a carrier disc (5) which is substantially similar to a standard compact disc. Cleaning brushes (14 and 15) are located on the carrier disc (5) on a face (6) thereof which, in use, faces the laser head (3) for cleaning the lens (2) as the carrier disc (5) rotates in the compact disc receiving location of the compact disc player. A non-reflective band (25) is printed on and extends around the outer periphery (12) of the carrier disc (5) for returning the laser head (3) from the outer periphery (12) of the carrier disc (5) to an inner periphery (11), so that as the laser head (3) cycles between the inner and outer peripheries (11 and 12) across the brusches (14 and 15), the brushes (14 and 15) engage the lens (2) in two different relative directions for cleaning thereof.
Patent CA-2221425-C (CA)
Inventor: GELLERT JOBST ULRICH
IPC: B29C45/27
Filed: 1997-11-13
Granted: 2005-07-12
Abstract: Multi-cavity injection molding apparatus having several side gate seals seated around the front end of each heated nozzle. Actuating mechanism is provided to advance the melt distribution manifold and the attached nozzles to a forward position without removing the mold from the molding machine. In this position, the front ends of the heated nozzles protrude from the mold to facilitate removal of the side gate seals and hot tip torpedoes for cleaning or replacement.
Patent CA-2222501-C (CA)
Title: A method to evaluate the hangover period in a speech decoder in discontinuous transmission, and a speech encoder and a transceiver
Inventor: KAPANEN PEKKA
IPC: G10L25/78
Filed: 1996-06-26
Granted: 2002-04-23
Abstract: The invention relates to a method for mutual synchronization of the transmitter's speech encoder and the receiver's speech decoder in a communication system utilizing discontinuous transmitter between the transmitter and the receiver. The discontinuous transmission comprises temporally sequential frame periods of which some periods will contain transmitted frames and some periods contain no transmission; whereby the method contains steps to generate information transmission periods (200) comprising at least one frame and containing information given by a user to said transmitter device, and silence periods (208, 209) having a length of at least one frame period and containing other information than that given by the user. The discontinuous transmission further comprises an irregularly occurring period (T) comprising at least one frame between the information transmission period (200) and the next silence period (208, 209), the irregular period forming a hangover period to determine the information relating to the silence period. In the method according to the invention the number of frame periods is counted in the receiver until a certain moment; the beginning of said silence period (208, 209) is detected; and based on said counted number of frame periods and the beginning of the silence period (208, 209) it is decided whether or not there is a hangover period (T) of said type between said information transmission period (200) and the silence period (208) following the information transmission period.
Patent CA-2235747-C (CA)
Title: Use of 1-(2-naphth-2-ylethyl)-4-(3-trifluoromethylphenyl)-1,2,3,6-tetrahydropyridine for preparing drugs for treating amyotrophic lateral sclerosis
Inventor: DOUILLET PATRICE
IPC: A61P21/00
Filed: 1996-10-25
Granted: 2006-01-03
Abstract: The present invention relates to the use of 1-(2-naphth-2-ylethyl)-4-(3-trifluoromethylphenyl)-1,2,3,6-tetrahydropyridine or its addition salts with pharmaceutically acceptable acids for the preparation of drugs intended for the treatment of amyotrophic lateral sclerosis (ALS).