baber/WOPTO huggingface dataset:
Patent CA-2029465-C (CA)
Title: Asphaltene dispersants-inhibitors
Inventor: STEPHENSON WILLIAM K
IPC: C09K8/524
Filed: 1990-11-07
Granted: 2002-02-19
Abstract: The present invention relates to an asphalt/asphaltene dispersant comprising an admixture of polymer A and polymer B ranging from 100 to 0 weight percent A to from 0 to 100 weight percent B, wherein polymer A is an alkyl substituted phenol-formaldehyde liquid resin having a weight average molecular weight ranging from about 1000 to about 20,000 and an alkyl substituent containing from 4 to 24 carbon atoms, which alkyl substituent may be a linear or branched alkyl group; and Polymer B is a hydrophilic-lipophilic vinylic polymer having a structure essentially described as:   (see formula I) wherein R is chosen, at each occurrence, from hydrogen and methyl groups; and R' is a hydrocarbonaceous group containing from 4 - 24 carbon atoms and chosen from linear or branched alkyl groups, aromatic, cyclic, alkaryl, aralkyl groups, and mixtures thereof; and A is chosen from the groups, (see formula II) and mixtures thereof; and M is chosen, at each occurrence, from the group hydrogen, alkali metal cations, alkaline earth metal rations, ammonium ions, protonated amines, quaternary amines, hydroxyl ethyl, hydroxy propyl and (see formula III) groups, where R is as defined herein, and mixtures thereof; and R'' is chosen, at each occurrence, from the group (see formula IV) where R is as defined herein, (see formula V) where M is as defined herein, and mixtures thereof; and m and n are both integers of sufficient number to achieve a weight average molecular weight. ranging from about 5,000 - 250,000, and being of such a ratio as to describe the presence of from 90 to 10 weight percent of the lipophilic monomer, m, and from to 90 weight percent of the hydrophilic monomer, n, and wherein x ranges from 1 to 20. The dispersants help maintain asphalt and asphaltenes in dispersion and inhibit fouling, precipitation or build-up in equipment.
Patent CA-2031603-C (CA)
Inventor: FARMER JAMES O
IPC: H04N7/16
Filed: 1990-12-05
Granted: 1996-12-03
Abstract: Television  service  denial  apparatus  comprises  a microprocessor controller for controlling the generation of a control signal waveform.   The control signal toggles a program denial device between first and second conditions. The program denial device, responsive to the control signal waveform,  only periodically outputs  a television  signal spectrum to which a sophisticated television receiver is able to synchronize.  Consequently, the program denial device may be a device having only 20 dB of signal isolation.  In one embodiment,  the program denial device comprises a signal modulator  for  modulating  an  incoming  television  signal spectrum including one continuous wave carrier channel having no superimposed video.  A character generator, responsive to the microprocessor, generates a control signal waveform for controlling  the  operation  of  the  signal  modulator. Consequently, while all television channels are obfuscated by the signal modulator during a period of service denial, the continuous wave carrier is modulated with a message signal for delivering a message to the subscriber on the continuous wave carrier channel indicating why service is disconnected.
Patent CA-2034209-C (CA)
Title: Method, system and composition for soldering by induction heating
Inventor: MCGAFFIGAN THOMAS H
IPC: H01R43/02
Filed: 1991-01-15
Granted: 2002-05-14
Abstract: This invention provides a method for soldering using induction heating, which is accomplished by the use of lossy heating particles in or on the solder and an alternating magnetic field. The lossy heating particles useful in this invention are magnetic particles, which can be ferromagnetic particles or ferrimagnetic particles, preferably ferrites, which have a Curie temperature at least equal to the flow temperature of the solder. These particles thereby provide a self-regulation feature which prevents overheating of the solder in the articles being soldered. The invention also discloses the use of particles with surface properties whereby the particles can either be wetted by the solder and remain in the solder when the solder flows or it can be nonwettable by the solder whereby the particles separate from the solder when the solder flows. This invention also discloses solder compositions, systems and assemblies utilizing the above combinations of solder and lossy heating particles.
Patent CA-2036291-C (CA)
Title: Operation method for power generation system using fuel cell
Inventor: NAKAZAWA KENZO
IPC: H01M8/24
Filed: 1991-02-13
Granted: 1994-06-07
Abstract: OPERATION METHOD FOR POWER GENERATION SYSTEM USING FUEL CELL               ABSTRACT OF THE DISCLOSURE     Anode  gas  is  fed to an anode  chamber  of  a  molten carbonate fuel cell and cathode gas is fed to a cathode chamber of the fuel cell.  CO2 is separated from gases discharged  from the cathode chamber of the fuel cell by a CO2 separator or  by another  fuel  cell which serves as the  CO2  separator.   The separated  CO2 is entirely or partially is introducted  to  the cathode  chamber with gases discharged from the  anode  chamber such that a CO2 concentration in the cathode chamber is  raised and the power generation is performed at a low CO2  utilization factor mode.
Patent CA-2040082-C (CA)
Inventor: GUERET JEAN-LOUIS
IPC: B65D35/50
Filed: 1991-04-09
Granted: 1999-12-21
Abstract: Ensemble (1) de distribution d'au moins un produit liquide ou sous forme de crème. L'ensemble comporta un récipient (2) sur lequel est fixée une tête de distribution (3) comportant au moins un canal de distribution. L'extrémité du canal de distribution est fermée selon l'invention par un système de fermeture (F) comportant un clapet (51) en matériau souple qui coopère, en position de repos, de façon non étanche, avec une embase (41) rigide fixe ; le clapet (51) s'écarte de ladite embase (41), lors de la distribution, par déformation élastique, sous la poussée du produit à distribuer, puis, lorsque cesse la distribution, se met dans une position qui permet une reprise d'air. L'ensemble (1) peut comporter en amont du dispositif de fermeture (F) un dispositif de sécurité permettant de couper la communication entra le récipient (2) et le dispositif de fermeture (F).
Patent CA-2044015-C (CA)
Title: A case with rotary mechanism for substances in stick form
Inventor: SUSINI CLAUDE
IPC: A45D40/12
Filed: 1991-06-06
Granted: 1999-06-15
Abstract: ABSTRACT OF THE DISCLOSURE         In a case equipped with a rotary mechanism for substances in stick form, the danger of accidental disengagement of the nipples of the sliding cup from the guide sleeves at the end of travel of the nipples is eliminated by inserting the edges of the walls of the slots of the inner sleeve within channels formed in the nipples.
Patent CA-2044767-C (CA)
Inventor: KARABIN TADEUSZ
IPC: F24B1/188
Filed: 1991-06-17
Granted: 1994-11-08
Abstract: ABSTRACT    A heat exchanger for use in a fireplace assembly having walls surrounding a fire combustion chamber, an air passage provided therein and a flue assembly for exhausting combustion chamber effluent. The heat exchanger includes a housing adapted to be mounted in the fire combustion chamber and communicating with the air passage.  The housing has a first housing wall, a second housing wall and intermediate walls connecting the first and second housing walls.  The first housing wall has an opening therein to receive combustion chamber effluent.          The second housing wall has an opening for emission of combustion chamber effluent which is adapted for communication with the flue of the fireplace assembly for exhaust of the combustion chamber effluent from the fireplace assembly.  Intermediate walls connect the first and second housing walls in a spaced relation.  Diversion means are fixed in the housing to form at least one elongated heat exchange surface to guide and direct combustion chamber effluent through the heat exchanger along a tortuous path and provide extended heat transfer surfaces.  The extended heat transfer surfaces serve to provide heat to a first air conduit formed between the first housing wall and the diversion means, a second air conduit within the diversion means and a third air conduit formed between second housing wall and the diversion means.  The air passage is in fluid communication with the air conduits and the air conduits are in fluid communication with the atmosphere
Patent CA-2057957-C (CA)
Title: Bone screw
Inventor: FRIGG ROBERT
IPC: A61B17/58
Filed: 1991-12-18
Granted: 1998-10-20
Abstract: A bone screw (1) has a screw head (2), a screw tip (11), and a shaft (5) with a thread (8,14).  The threaded segment (6,7) of the shaft (5) has a head-end, essentially cylindrical first shaft section (6) with minor diameter d1 (16), and a tip-end second shaft segment (7) that is connected with the first shaft segment (6) and which has a smaller minor diameter d2 (17).  The thread (8,14) in the two shaft segments (6,7) has the same pitch (10,12).
Patent CA-2058386-C (CA)
Title: Cell free marek's disease virus vaccine
Inventor: BAXENDALE WILLIAM
IPC: C12N7/08
Filed: 1991-12-23
Granted: 2003-02-11
Abstract: The present invention is concerned with a vaccine for the protection of poultry against Marek's Disease.        The cell free vaccine of the invention facilitates the handling of the vaccine and reduces the chance of physical abuse. The invention also relates to bivalent or polyvalent vaccines comprising in addition other viruses of the Marek's Disease virus group, i.e. HVT.
Patent CA-2065809-C (CA)
Title: Gastroresistant pharmaceutical formulations for oral administration containing salts of bile acids
Inventor: MARCHI EGIDIO
IPC: A61K47/32
Filed: 1992-04-10
Granted: 1999-01-12
Abstract: Pharmaceutical  formulations  for  oral  administration coated  by an enterosoluble gastroresistant film,  preferably selected  from  gastroresistant  granulates,  gastroresistant tablets,  gastroresistant  hard gelatine capsules  containing powders  or  granulates  or  two  or  more  tablets  or  oily suspensions, gastroresistant soft gelatine capsules containing oily  suspensions  and  hard  gelatine  capsules   containing gastroresistant   granulates  or two or more  gastroresistant tablets,  containing  therapeutically  effective  amounts  of salts  of  bile acids with alkali metals  or  organic  bases, process  for their preparation and therapeutic use thereof in the  treatment  of biliary  calculoses,  biliary  dyspepsias, biliary cirrhosis and chronic and cholestatic hepatopathies.
Patent CA-2067268-C (CA)
Inventor: DUBOST DOMINIQUE
IPC: B01J37/02
Filed: 1992-04-27
Granted: 1996-12-10
Abstract: L'invention concerne un système catalytique et son procédé de fabrication. Le système catalytique est constitué d'un support sur lequel le produit catalytiquement actif est déposé. Le support présente des propriétés mécaniques ou physiques intéressantes pour les conditions de fonctionnement requises; mais une surface spécifique médiocre. Le produit catalytiquement actif, un carbure métallique, est obtenu par engobage du support dans une suspension d'un composé réductible du métal dans une solution d'un composé organique, carbonisation de ce composé, réduction du composé métallique et carburation du métal. Le carbure ainsi obtenu présente une surface spécifique élevée. De préférence, le support est constitué de carbure de silicium préparé par carbonisation d'une pâte contenant du silicium, du carbone et une résine organique. L'invention s'applique à toute forme de catalyseur, mais en particulier aux catalyseurs monolithiques destinés au traitement des gaz d'échappement.
Patent CA-2068136-C (CA)
Title: Spacecraft antenna pattern control system
Inventor: BERKOWITZ MILTON
IPC: H04B7/185
Filed: 1992-05-07
Granted: 2001-09-04
Abstract: A system for controlling a radiation pattern of an antenna array carried on a spacecraft, to provide and maintain a desired pattern over a preselected area remote from the spacecraft, without physical movement of the array with respect to the spacecraft even if the spacecraft is physically reoriented with respect to the remote earth area, uses sensors, carried on the spacecraft, for determining spacecraft reorientation relative to the preselected earth area, so as to provide at least one error signal responsive to any spacecraft reorientation; a phased-array antenna system, inertialessly reconfigures the array radiation pattern responsive to a set of directional pointing data; a loop provides the directional pointing data in a manner serving to minimize the error signals from the sensing means and thus cause the antenna radiation pattern to remain substantially fixed on the remote earth axes even if the spacecraft is reoriented.
Patent CA-2069888-C (CA)
Inventor: CRYDERMAN ROBERT L
IPC: E01B5/02
Filed: 1990-11-30
Granted: 1999-07-27
Abstract: A unitary one quarter mile long railroad rail and system and method for manufact uring the same. The unitary rail eliminates the problem of weld seams in the one quarter mile long sections of rails which a re transported to the installation site The method of manufacture is characterized by the use of a continuous rolling proces s and the in-line controlled cooling of the rail.
Patent CA-2071344-C (CA)
Title: Process for producing an optical fiber coupler
Inventor: SUGANUMA HIROSHI
IPC: G02B6/28
Filed: 1992-06-16
Granted: 1997-04-15
Abstract: The first process for producing an optical fiber coupler includes a first step wherein at least one of the optical fibers to be used is stripped of the coating, a second step in which the bare portion of that optical fiber is heated for a predetermined time to diffuse the dopants, a third step wherein the other optical fibers which have not been heat-treated are stripped of their coating, a fourth step in which the bare portions of all the optical fibers are heated as they are brought into intimate contact, thereby forming a unitary portion, and a fifth step wherein the unitary portion is drawn via heating to form the coupling portion of an optical fiber coupler.  The second process for producing an optical fiber coupler includes stripping the coating from at least one optical fiber, fixing the fiber so as to impart an axial stress thereto and then heating the bare portion of the stripped optical fiber thereby thinning the diameter of the heated portion, and then proceeding in the same manner as described with respect to the third through fifth steps of the first embodiment of the present invention.  The processes according to the present invention enable a wide-band optical fiber coupler to be easily produced without using optical fibers of different structures but using optical fibers of identical structures.
Patent CA-2073272-C (CA)
Title: Microwave resonator of compound oxide superconductor material
Inventor: HIGAKI KENJIRO
IPC: H01P7/08
Filed: 1992-07-07
Granted: 1997-04-01
Abstract: A microwave resonator includes a superconducting signal conductor formed on a first dielectric substrate, and a superconducting ground conductor formed on a second dielectric substrate. The first dielectric substrate is stacked on the superconducting ground conductor of the second dielectric substrate. A rod is adjustably provided to be able to penetrate into an electromagnetic field created by a microwave propagation through the superconducting signal conductor, so that the resonating frequency fo of the microwave resonator can be easily adjusted by controlling the position of a tip end of the rod.
Patent CA-2076123-C (CA)
Title: Decision feedback equalization for digital cellular radio
Inventor: CHENNAKESHU SANDEEP
IPC: H04L7/02
Filed: 1992-08-13
Granted: 1999-01-19
Abstract: An adaptive Decision Feedback Equalizer (DFE)  (40) for a digital  cellular  mobile  radio  channel  demodulator  (30) employs a Complex Fast-Kalman Adaptation algorithm (56) to track channel variations  Sensitivity to sample timing jitter is reduced by providing the DFE with fractionally spaced feed-forward taps  (50').   Deficiencies inherent in using a reduced precision implementation are overcome by adding a dither signal to sets of operation  in the algorithm, the dither signal comprising an appropriately selected Gaussian random variable. For small delay spreads of approximately one third of a symbol duration or less, a resulting degradation in Bit Error Rate is avoided by switching the DFE out of the circuit or by reducing the number of taps of the DFE.  For delay spreads of less than 40 microseconds and greater than approximately 10 microseconds, a (2,3)  fractionally spaced DFE provides an adequate compromise between complexity and performance.
Patent CA-2077636-C (CA)
Title: Rigid four radii rim paper plate
Inventor: LITTLEJOHN MARK B
IPC: A47G19/02
Filed: 1992-09-04
Granted: 1999-11-23
Abstract: A pressed paper plate includes a planar center 12 which forms a bottom for the plate and has an outer peripheral surface 13. An outwardly projecting side wall 14 includes a first rim portion 14A which is convex upward and is joined to the outer peripheral surface of the planar center, and a second rim portion 14B which is convex downward and is joined to the first rim portion. A third rim portion 16A, which is joined to the second rim portion of the outwardly projecting side wall and a fourth rim portion 16B which is provided for forming an outer edge for the container, are both convex downward.      The arc lengths and radii of the first, second, third and fourth rim portions are selected for enhancing rigidity of the pressed paper plate as compared to a conventional paperboard container made from the same paperboard stock.
Patent CA-2078371-C (CA)
Title: Soft coding for hdtv
Inventor: FARYAR ALIREZA FARID
IPC: H04N21/2383
Filed: 1992-09-16
Granted: 2000-10-10
Abstract: Blocks of HDTV picture information are selected for transmission at a plurality of channel rates of an HDTV transmitter. The size of each block of HDTV picture information is dependent on a target distortion parameter for the HDTV picture information. As a result of this selection, a portion of each block of HDTV picture information is transmitted at the lower channel rate, with the result that the HDTV transmitter range is maximized while maintaining a picture quality for the resulting HDTV video image.
Patent CA-2083337-C (CA)
Title: Mild steel etching process, bath and facility
Inventor: MYSSON CHRISTINE
IPC: C23G3/02
Filed: 1992-11-19
Granted: 2002-12-31
Abstract: Process for pickling a material made of mild steel, consisting in removing the scale formed during a conversion operation with heating by immersing the said material at a specified temperature in a pickling bath comprising a sulphuric acid/hydrochloric acid mixture and Fe(II) ions, characterised in that a pair of sulphuric acid concentration A and of hydrochloric acid concentration B is determined, giving an optimum pickling time for at least one Fe(II) ion concentration and at least one temperature, which are determined, the optimum pickling time being obtained as an optimised response by the simplex method, by comparing the values obtained for the pickling time for successive values of A and B, A and B being considered as variables, while the Fe(II) ion concentration and the temperature are constant. The invention also relates to a pickling bath and to a plant for making use of the process of the invention.
Patent CA-2088145-C (CA)
Title: Channel electron multiplier phototube
Inventor: SCHMIDT KENNETH C
IPC: H01J43/24
Filed: 1991-05-13
Granted: 2001-11-20
Abstract: A channel electron multiplier phototube having a channel electron multipli-er, a transparent faceplate, and an anode assembly. The channel electron multiplier includes an insulating body (32) having a curved passageway extending there-through, A photoemissive element (36a), and a secondary emissive dynode material is on the walls of the passageway. The passageway, together with a photoemission film of the photocathode assembly and the anode (42) of the anode assembly define an evacuated closed region. Preferably, the electron multiplier is a monolithic cer-amic body (32).
Patent CA-2092020-C (CA)
Title: Refrigerant for producing ice
Inventor: HINO TOSHIYUKI
IPC: C09K5/04
Filed: 1993-03-19
Granted: 1996-04-02
Abstract: An ice making refrigerant mainly consists of at least one compound selected from the group of normal perfluoropen-tane, cycloperfluoropentane, isoperfluoropentane, and fluo-rohydropentane.  The refrigerant may also consists of pen-tane mixed with a sufficient amount of one or more of the above compounds for making the refrigerant substantially incombustible.  The refrigerant is highly resistant to combustion and free from destroying the stratospheric ozone layer.  Ice is produced by mixing the refrigerant in liquid phase with water at a pressure higher than the saturation pressure PO of the refrigerant for 0 °C and then ejecting the water-refrigerant mixture into a tank at a pressure below the above saturation pressure PO, so as to evaporate the refrigerant and let the water freeze by the latent heat of evaporation of the refrigerant.  It is particularly suitable for air conditioning systems with heat storage in ice, direct contact type ice making plants, direct contact type water chillers, and the like.
Patent CA-2095551-C (CA)
Title: Improvements in refuse vehicles
Inventor: LANZDORF DANIEL J
IPC: B65F3/04
Filed: 1993-05-05
Granted: 1999-03-16
Abstract: This invention pertains to a combined refuse vehicle and refuse side loaded and recycling curbside collector vehicle. Recycled materials may be placed either in (i) a hopper which is elevated and tilted to discharge into the upper, open end of a recycling bin or (ii) to elevate roller cart vehicles into an upper loading position.  In either event, the bins are side tilted and displaced transversely of the vehicle axis for roll-off clearance.  Refuse is loaded at curbside level and forced into a packer body from the body up whereby previously charged refuse acts to compress subsequently charged refuse.  A tag axle-drive axle system is disclosed which, by means of a proportioning valve, causes the legal loads on the tag axle-drive axle combination to be reached simultaneously.
Patent CA-2103524-C (CA)
Title: Method for imparting ability of preventing obesity and impaired glucose tolerance to foods and foods and sugar preparations exhibiting such preventive effects
Inventor: WAKABAYASHI SHIGERU
IPC: A23L9/10
Filed: 1993-08-06
Granted: 1999-06-15
Abstract: A method for imparting an ability of preventing obesity and impaired glucose tolerance to foods which comprises incorporating indigestible dextrin containing at least 30% by weight of indigestible components into a food in an amount ranging from 1 g to 30 g per meal of the food; a food having an ability of preventing obesity and impaired glucose tolerance which comprises the indigestible dextrin in an amount ranging from 1 g to 30 g per meal of the food; and a sugar preparation having an ability of preventing obesity and impaired glucose tolerance comprises sugar particles coated with the indigestible dextrin.  The food and sugar preparation can ensure the prevention of obesity and impaired glucose tolerance through inhibition of increases in the blood-sugar level and insulin-secretion.
Patent CA-2108883-C (CA)
Inventor: POPESCU PETRE
IPC: H03K17/62
Filed: 1992-11-12
Granted: 1999-05-04
Abstract: A differential ECL (emitter coupled logic) circuit, with differential inputs and output and no series gates, comprises a plurality of transistor pairs. The differential ECL circuit can operate at high speed as there are no series gates and its noise margin is large because of differential operation. The differential circuit can be implemented into various logic circuits such as XOR (exclusive OR)/NXOR, OR/NOR, AND/NAND.