baber/WOPTO huggingface dataset:
Patent CA-2221769-A1 (CA)
Title: Method for quantitatively determining an antibody having the ability to inhibit the activity of a reverse transcriptase
Inventor: ODAWARA FUMITOMO
IPC: C12Q1/6804
Filed: 1996-05-24
Abstract: Disclosed is a method for quantitatively determining an antibody, contained in a biological sample, having the ability to inhibit the activity of a reverse transcriptase derived from an HIV, comprising: reacting a hybridization product, immobilized on a solid phase, of a primer consisting essentially of oligodeox-ythymine nucleotide and an RNA template consisting essentially of adenine ribopolynucleotide with a reverse transcriptase derived from HIV, to thereby bind the reverse transcriptase to the hybrid-ization product; conducting a synthesis of a DNA complementary to the RNA template from a deoxymononucleotide triphosphate in the presence of the reverse transcriptase activity-inhibiting anti-body; and measuring the amount of the synthesized DNA and quanti-tatively determining the above-mentioned antibody, based on the measured amount of the synthesized DNA. The method of the present invention can be performed with ease and with high reproducibility in classifying and quantitatively determining the antibodies against the epitopes of a viral reverse transcriptase. By the method of the present invention, not only the virus having mutated during a latent period thereof, and the properties which the virus exhibits as a result of the mutation, but also a virus having ac-quired drug resistance as a result of the administration of the drugs to the host, can be studied by quantitatively determining the antibodies. Further, it has also become possible to accurate-ly and promptly determine the changes in the infected host, such as the change in the ability to produce antibodies, which occur in accordance with the progression of illness.
Patent CA-2227039-A1 (CA)
Title: One pot synthesis of 2-oxazolidinone derivatives
Inventor: PATEL RAJNIKANT
IPC: C07C/
Filed: 1996-08-02
Abstract: The present invention provides an improved process for preparing (S)-4-{[3-[2-(dimethylamino)ethyl]-1H-indol-5-yl]methyl}-2--oxazolidinone which comprises: a) forming a carbamate of formula (III), from methyl 4-nitro-(L)-phenylalaninate hydrochloride; b) reducing the compound of formula (III) to give the compound of formula (IV); c) reducing the methyl ester grouping in the compound of formula (IV) to give the compound of formula (V); d) ring closure of the compound of formula (V) to give the compound of formula (VI); e) diazonium salt formation from the compound of formula (VI) followed by reduction to give the compound of formula (VII); f) Fischer reaction of the compound of formula (VII) to give (S)-4-{[3-[2-(dimethylamino)ethyl]-1H-indol-5-yl]methyl}-2-oxazolidinone.
Patent CA-2227404-A1 (CA)
Inventor: BENDER FREDRIC GRANT
IPC: A23B4/10
Filed: 1996-07-18
Abstract: A process for treating animals and/or seafood comprising the stepof contacting the animal and/or seafood with a treatment solution containing trialkali metal orthophosphate at a temperature of between about 90 ~F and about 200 ~F for a time period effective, to remove, reduce or retard bacterial contamination without significantly depreciating the organoleptic properties of the animal and/or seafood is provided.
Patent CA-2227796-A1 (CA)
Title: Procede d'impression electrostatique de particules ameliorant l'image et particules utilisees
Inventor: SELL WILLIAM D
IPC: G03G9/08
Filed: 1996-08-14
Abstract: La présente invention concerne un procédé d'impression électrostatique de particules de rehaussement d'image. Ce procédé comporte plusieurs opérations. Une première opération consiste à réaliser sur un substrat une première image formée au moyen d'une composition comprenant, d'une part (I) éventuellement des particules d'impression électrostatique de rehaussement d'image, et d'autre part (II) éventuellement des particules de toner. Ces particules d'impression électrostatique de rehaussement d'image sont constituées (A) d'une particule de rehaussement d'image et (B) d'une matière électrostatiquement chargeable se fixant sur la surface extérieure de la particule de rehaussement d'image. Cette matière électrostatiquement chargeable est elle-même constituée (i) d'une matière polymère électrostatiquement chargeable et (ii) éventuellement d'un composé régulateur de charge. Une deuxième opération consiste à produire éventuellement une ou plusieurs images ultérieures en concordance avec la première image. Une troisième opération consiste en un passage au four de l'image ou des images déposées. L'invention concerne également de nouvelles particules de rehaussement d'image pour impression électrostatique.
Patent CA-2227820-A1 (CA)
Title: Cylindrical head boring tool
Inventor: POMP THOMAS
IPC: B27G15/00
Filed: 1998-01-23
Abstract: A cylindrical head boring tool such as a Forstner drilling tool has a main cutting edge with a centering point. The main cutting edge extends diametrically across the entire circular cross-section of the boring head and has cut out surfaces and chip channels adjacent the main cutting edge. The chip channels open through the outer periphery and extend obliquely through the boring head. Each end of the main cutting edge is adjacent a preliminary cutting edge coinciding with the circumference of the boring head to guide the boring tool. The preliminary cutting edge reaches to the edge of the respective other chip channel and forms the peripheral edge of an essentially cylindrically curved wall of the boring head. The otherwise smooth curved wall is interrupted by radial throats.
Patent CA-2228006-A1 (CA)
Inventor: KOPPELMAN EDWARD
IPC: C10L9/00
Filed: 1996-07-17
Abstract: The present invention relates to various apparatuses and processes for treating carbonaceous materials to remove by-products therefrom. More particularly, the present invention relates to the treatment of carbonaceous materials by injecting an inert gas into the carbonaceous material under a vacuum or injecting steam into the carbonaceous material either with or without the vacuum being applied in a controlled manner to more consistently treat the charge of carbonaceous material.
Patent CA-2229757-A1 (CA)
Inventor: TRUCHSESS JOSEPH F
IPC: A63H3/40
Filed: 1998-02-17
Abstract: An animated character having a face unit provided in a support structure upper body portion so as to resemble a singing tree.. The face unit includes a face member and mechanism which consists of two pivotable eye elements and a lower lip element each separately driven by an electric motor through a gear and linkage system. A control circuit unit and a speaker are provided in the support structure, so that the eyes and mouth elements of the face unit are moved by the face mechanism in synchronism with singing and/or speaking sounds produced by the control circuit system and speaker mounted in the support structure
Patent CA-2230376-A1 (CA)
Title: Piezo speaker for improved passenger cabin audio systems
Inventor: EATWELL GRAHAM P
IPC: H04R17/00
Filed: 1996-09-25
Abstract: This invention outlines several applications of piezoelectric vibrators (4) to produce quality flat panel speakers in passenger cabin applications. A system consisting of an audio amplifier (2) and transformer (3) is used to drive the piezo speaker (4). The electronics are packaged (8) so that they fit in small modules that can be attached to a cabin structure to produce a speaker. The invention includes a variety of flat panel speaker designs, including one in which the existing structure is converted into a speaker, and thin membrane and/or panels that are fitted with piezoelectric elements (Figures 5 and 6). A  system consisting of cabin quieting and flat panel speakers is also discussed where the mid and high frequency audio is produced by panel speakers (74-79) and the low frequency audio is produced from dynamic loudspeakers (80-84). The cabin systems discussed in this patent are applicable to automobiles, aircraft, trucks and buses.
Patent CA-2230863-A1 (CA)
Inventor: HOUSSIAN VAZGEN
IPC: H01R13/44
Filed: 1998-02-26
Abstract: A receptacle plate cover for a standard duplex electrical outlet which covers the entire outlet except for the outlet apertures that receive the prongs of an electrical plug.
Patent CA-2230946-A1 (CA)
Title: Removal of carbonyl impurities from a carbonylation process stream
Inventor: SCATES MARK O
IPC: C07C53/08
Filed: 1996-09-06
Abstract: A process to reduce carbonyl impurities in a carbonylation reaction for the production of acetic acid is described. The methyl iodide recycle stream which is directed to a carbonylation reactor for carbonylating methanol or methyl acetate to acetic acid, is treated to remove carbonyl impurities by reacting the methyl iodide stream formed in the reaction with an aqueous amino compound which reacts with the carbonyls to form water soluble nitrogenous derivatives, separating an organic methyl iodide phase from an aqueous derivative phase and distilling the methyl iodide phase to remove heavier impurities. The treatment of the methyl iodide recycle stream to the carbonylation reactor has been found to greatly reduce the carbonyls present in the acetic acid product. The formation of nitrile from the nitrogenous derivative during distillation may be minimized by adding water to the system.
Patent CA-2240067-A1 (CA)
Inventor: NEHARI SHLOMO
IPC: C01F7/306
Filed: 1996-12-12
Abstract: A process for the simultaneous recovery of substantially pure alumina and silica from an aluminosilicate. The process comprises the following steps: (i) heating the aluminosilicate with hydrated CaCl2 to obtain calcium-alumino-silicate and calcium-aluminate products, wherein the CaCl2 is substantially free of MgCl2; (ii) leaching the products with HCl to form a solution comprising AlCl3 and CaCl2, and insoluble silica; (iii) separating the insoluble silica from the solution; and (iv) crystallizing AlCl3 from the solution and recovering the alumina from the crystallized AlCl3. The process may further comprise the following steps: (v) substantially removing MgCl2 from the CaCl2 solution of step (iv); and (vi) recycling the CaCl2 solution for use in step (i).
Patent CA-2240335-A1 (CA)
Title: Endoscope dont les composants electriques sont isoles electriquement des composants en contact avec le patient
Inventor: CRAWFORD JOHN O
IPC: G02B23/24
Filed: 1997-09-30
Abstract: L'invention concerne un endoscope comprenant des tubes intérieurs et extérieurs, le tube intérieur abritant les composants électriques. Une gaine électro-isolante est disposée autour du tube intérieur pour isoler électriquement le tube intérieur et les composants électriques vis-à-vis du tube extérieur. Dans un mode de réalisation préféré de l'invention, une bague électro-isolante est disposée entre une majeure partie du tube intérieur et la partie distale du tube intérieur pour isoler électriquement la partie d'extrémité distale du tube intérieur vis-à-vis de la majeure partie du tube intérieur et des composants électriques. Par conséquent, les composants de l'endoscope susceptibles d'être en contact avec le patient, c'est-à-dire le tube extérieur et la partie d'extrémité distale du tube intérieur, sont électriquement isolés vis-à-vis du tube intérieur et des composants électriques situés à l'intérieur, ce qui permet d'éviter des flux de courant électriques préjudiciables au patient.
Patent CA-2241426-A1 (CA)
Title: Method of producing ocular lens and holders for holding lens blank during cutting thereof
Inventor: ICHIKAWA SEIICHI
IPC: B23Q3/08
Filed: 1998-07-30
Abstract: A method is provided for producing an ocular lens. The method includes the steps of preparing a lens blank which gives an ocular lens, the lens blank having a concave back surface and a convex front surface, at least a portion of the front convex surface being tapered or frusto-conical. A back curved surface of the ocular lens is formed by effecting a cutting operation on the concave back surface of the lens blank, while the lens blank is supported on a spindle of a back surface cutting device such that the tapered or frusto-conical portion of the lens blank is drawn onto a tapered holding surface of the spindle under a negative pressure which is applied to the lens blank, the tapered holding surface following a profile of the tapered or frusto-conical portion of the lens blank. A front curved surface of the ocular lens is formed by effecting a cutting operation on the front convex surface of the lens blank whose back concave surface has been cut to form the back curved surface, while the lens blank is supported on a spindle of a front surface cutting device such that the back curved surface of the lens blank is drawn onto a holding surface of the spindle of the front surface cutting device under a negative pressure which is applied to the lens blank.
Patent CA-2242015-A1 (CA)
Title: New chromene derivatives, the procedure for preparing them and the pharmaceutical compounds that contain them
Inventor: DUBUFFET THIERRY
IPC: C07D491/052
Filed: 1998-06-22
Abstract: Hexahydro-chromeno-Ä3,4-cÜ-pyrrole derivatives of formula (I), their enantiomers, diastereoisomers and salts are new. m = 0-3; n = 0-3; n+m = 2 or 3; p = 1-6; the junction between rings B and C is trans; X = CN or -CONR4R5; R4, R5 = H, 1-6C alkyl, 3-7C cycloalkyl or optionally substituted aryl; A = sigma bond or -NR-CO-, -CO-NR-, -NR-SO2-, or -SO2-NR-; R = H or 1-6C alkyl; R1, R2 = H or 1-6C alkyl; R3 = H or phenyl, naphthyl or heteroaryl (all optionally substituted by one or more halo, 1-6C alkyl or alkoxy, OH, CN, NH2, NO2, COOH, 1-6C perhaloalkyl, sulphonyl, acylamino, 1-6C alkylsulphonyl, or 1-6C alkyl sulphonylamino), aryl or heteroaryl (both substituted by A'-Cy), 2-indolinon-5-yl, or, when A is a sigma bond, aryloxy or arylthio; A' = sigma bond or 1-6C alkylene or alkenylene, (in which one C atom may be replaced by O or S), -NR-CO-, -CO-NR-, -NR-SO2-, or -SO2-NR-; Cy = aryl or heteroaryl (optionally substituted); provided that when n = 0, then m is other than 2, when n = 1, R1, R2 = H, A = sigma bond and p = 1, then R3 is not phenyl nor pyridyl, when n = 1, R1 & R2 = H, A = sigma bond, R3 is not H, when n = 1, R1 & R2 = H, A = -NH-CO-, then R3 is other than H, phenyl, naphthyl, thienyl, furyl, pyrrolyl, pyridyl, (all optionally substituted by one or more halo, trihalomethyl, alkoxy or OH).
Patent CA-2243681-A1 (CA)
Title: Profiled web for venting and draining floor tiles, particularly ceramic tiles, laid in a thin retaining layer
Inventor: GUTJAHR WALTER
IPC: E04F15/02
Filed: 1998-07-21
Abstract: Profiled web for arrangement between the underside of floor tiles which are to be laid on a support plate in a thin retaining layer and the upper surface of the support plate, comprising an inherently rigid plastic film which is so profiled by means of closely spaced, parallel sections which are deformed successively in the opposite sense to the preceding strip-shaped section that channels are produced which are open alternately towards the support plate and the underside of the floor tiles. The plastic film is provided, at least in regions, with a plurality of through openings which produce a liquid - and gas - permeable connection of the channels which are open to the upper surface with the underside, particularly with the channels of the profiled web which are open to the underside. A liquid - and gas - permeable textile mesh can be firmly adhesively laminated onto the upper surface of the profiled web directed towards the floor files.
Patent CA-2244000-A1 (CA)
Title: Line cards for uvg, coin, isdn, and special services
Inventor: JOHAL JASKARN S
IPC: H04M19/02
Filed: 1997-02-05
Abstract: A method and apparatus for the generation of special telecommunications services including integrated services digital network (868), coin phone (870), and T1 circuits (a610) on a line card (816) which also supports Plain Old Telephone services (POTs) is presented. In a Fiber-to-the-Curb (FTTC) network configuration a line card (816) containing POTs circuits and special services circuits is used to obtain a close statistical match between the requested number of regular and special telecommunications circuits and the number of circuits available from the optical network unit (ONU)(110).
Patent CA-2245888-A1 (CA)
Title: Isolation and amplification of nucleic acid materials
Inventor: BOOM WILLEM RENE
IPC: C12Q1/6855
Filed: 1997-02-14
Abstract: The invention relates to methods for easily separating single stranded nucleic acid material from double stranded nucleic acid material in a sample containing both. By the right choice of at least one chaotropic agent, preferably a guanidine salt, at a selected concentration and other suitable conditions such as chelating agents, pH and the like, it is possible to bind double stranded material to a solid phase such as silica particles, whereas single stranded material will not bind under those circumstances. By separating the silica particles from the sample the double stranded nucleic acid material is removed. It can easily be eluted from the silica particles. In a second step the single stranded material may be bound to a solid phase by selecting a different set of conditions. The particles can again be separated from the sample and the single stranded material may now be eluted. For every efficient separations, the process may be repeated. Following the separation of the two kinds of nucleic acid, either kind may be amplified. Methods of amplification are provided which do not need sequence data of the material to be amplified. In these methods a primer will be provided with an amplification motif and a random hybridization motif.
Patent CA-2246527-A1 (CA)
Title: Treatment of a combustible gas stream
Inventor: GRAVILLE STEPHEN RHYS
IPC: F23G7/06
Filed: 1998-09-04
Abstract: In a process and apparatus for recovering sulphur from a combustible gas stream comprising hydrogen sulphide, air, commercially pure oxygen or oxygen-enriched air, and the combustible gas stream are fed to a burner 4 which fires into an elongate furnace 2. A longitudinally extending flame 12 is created which as a relatively oxygen-poor endothermic hydrogen sulphide dissociation region 14, and a relatively oxygen-rich, intense hydrogen sulphide combustion region 16.  Residual hydrogen sulphide reacts with sulphur dioxide formed by the combustion to produce sulphur vapour. The furnace 2 has an aspect ratio of 8:1. The flame 12 diverges from its root to occupy at its maximum cross-sectional area at least 80% of the cross-sectional area of the furnace interior coplanar therewith.
Patent CA-2246551-A1 (CA)
Title: Fabric care method
Inventor: FREIERMUTH BEAT
IPC: C11D3/30
Filed: 1998-09-04
Abstract: The present invention provides a process for inhibiting the re-absorption of migrating dyes in the wash liquor, comprising introducing into a wash liquor containing a peroxide-containing detergent, from 0.5 to 150, preferably from 1.5 to 75, especially from 7.5 to 40 mg, per litre of wash liquor, of one or more compounds having the formula:                           (see fig. I) in which n is 1, 2 or 3; A is an anion; Y is -(CH2)m in which m is an integer ranging from 1 to 8; -(CH2)p-CH(R1)- in which p is an integer ranging from 1 to 7 and R1 is linear or branched C1-C4-alkyl, preferably methyl; -CX=CX- in which X is cyano, linear or branched C1-C8-alkyl or di(linear or branched C1-C8-alkyl)-amino; -(CH2)q-NR1-(CH2)q- in which R1 has its previous significance and q is 1, 2, 3 or 4; or a 1,2-cyclohexyline residue having the formula:      (see fig. II); and R is cyano; halogen; hydroxy; OR1 in which R1 has its previous significance; CO2R2 in which R2 is hydrogen or linear or branched C1-C4-alkyl; nitro; linear or branched C1-C8-alkyl; di-(C1-C12alkyl)amino; NR3R4 in which R3 and R4 are the same or different and each is linear or branched C1-C12-alkyl; or -N~R1R3R4 in which R1, R3 and R4 have their previous significance.
Patent CA-2246848-A1 (CA)
Title: Four-cycle engine for outboard motor
Inventor: TSUNODA MASAKI
IPC: B63H20/00
Filed: 1998-09-11
Abstract: A four-cycle engine for an outboard motor includes an upwardly extending breather chamber which communicates with a projecting portion provided at a lower part of a crankcase and with an induction system via a PCV passage for returning a blow-by gas to intake manifolds. With this arrangement, it becomes possible to remove oil components from the blow-by gas within the PCV passage and hence to return the substantially oil-free blow-by gas to the intake manifolds.
Patent CA-2247083-A1 (CA)
Title: Video viewing experiences using still images
Inventor: GRANTHAM H CRAIG
IPC: G08B13/196
Filed: 1997-02-20
Abstract: A method and apparatus for sequencing views retrieved from a spherical still image file (6) provide the viewer the perception of video performance with low bandwidth transmission. The method incorporates digital transmission (9) and automatic sequencing (7) of the playback of the view. The apparatus provides video-motion rate images via low bandwidth digital transmissions or small data files from a still image taken of an inanimate environment. The resulting method and apparatus allows the viewer to experience a video display of any environment (for example, real estate locations, malls, museums, and hotels) and view a "video" tour of the location through a low bandwidth transmission.
Patent CA-2247553-A1 (CA)
Inventor: CROWDER VICKI JO
IPC: H04M3/56
Filed: 1998-09-14
Abstract: In implementing an immediate call conference, a voice response unit will handle the validation of the user's billing using major credit carts or telephone cards  The voice response unit will assigned a conference id to the user after the transaction is approved.  Then the voice response unit will access a conference bridge which will prepare for immediate conferencing by aligning a conference identification number with the validated billing number. A live conference coordinator will then be connected to the user to collect names and destinations of the conferencing parties. At the conclusion of the call, the bridge writes a call record including destinations, duration and the conference Id for each call leg. The call record is then matched to the user's billing information and an invoice is generated.
Patent CA-2248450-A1 (CA)
Inventor: RUDOLPH WERNER
IPC: C07C11/21
Filed: 1998-09-22
Abstract: A widely applicable process for the manufacture of carotenoids by a Wittig reaction comprises carrying out the Wittig reaction in a polar reaction medium in a manner such that neither all reactants nor the thus-manufactured carotenoid are significantly dissolved in the reaction medium. An especially suitable reaction medium is a polar, toxicologically harmless solvent (mixture) which remains monophasic on the addition of water in an amount up to about 30 vol.% and which permits the triarylphosphine oxide which is formed to dissolve well. Lower alcohols and acetone, as sole solvents or as mixtures with one another and/or with water, are especially suitable. This process permits the use of much more concentrated reaction mixtures, simplifies the regeneration of the solvent and generally the reaction procedure and avoids toxicologically objectionable solvents such as halogenated hydrocarbons.