baber/WOPTO huggingface dataset:
Patent CA-2017032-C (CA)
Title: Hydrometallurgical silver refining
Inventor: TAN KHAY GIE J
IPC: C25C7/06
Filed: 1990-05-17
Granted: 1995-10-10
Abstract: An efficient hydrometallurgical refining method is disclosed for the production of high purity silver. The method comprises:   casting an anode of raw silver; subjecting the cast anode to an electrorefining stage wherein the raw silver is directly electrorefined in a suitable  electrolyte  solution;  leaching  the  anodic residue  with  an  approporiate  lixiviant  to  dissolve impurities and precipitate silver in the form of a silver compound  that  is  suitable  for  conditioning  the electrolyte;  treating  the  leach  liquor  to  recover dissolved silver and recycling recovered silver to the leaching or anode casting stage; and treating the anolyte in  a  conditioning  stage  with  an  appropriate  silver compound prior to recycle to the electrorefining stage as catholyte.   The process is fast and simple to operate since the sequencing of steps has been rationalized and the reagent requirements and harmful emissions are low. The life of the electrolyte extends over many electrode cycles and valuable byproducts are also recovered.   In the preferred embodiment,  raw silver anodes with major arsenic  and  antimony  impurities  are  electrorefined directly;  e.g.,  in  a  silver  nitrate  medium  using  a diaphragm cell.   The major impurities form a porous, thick  and  adherent  layer  which  is  spalled  off periodically.  Pure silver is deposited at the cathode as a dense powder at a high current efficiency.  The anolyte is  pumped  to  an  external  conditioning  circuit  where Ag2SO4  and  lime  are  added  to  maintain  a  stable electrolyte composition.  The treated electrolyte is then recycled to the cathode compartment.   Silver sulphate (Ag2SO4)  is  produced by  leaching the anodic residues and/or other suitable materials in a separate step.
Patent CA-2023114-C (CA)
Inventor: OMURA SATOSHI
IPC: C12P21/04
Filed: 1990-08-10
Granted: 1996-12-17
Abstract: A microorganism for selective production of a specific component of avermectin having one or more of the following properties:        - specific accumulation of avermectin component "a", - effective incorporation of isoleucine or its keto acid (3-methyl-2-oxovaleric acid) into the avermectin molecule, and - markedly suppressed incorporation of valine or its keto acid (2-oxoisovaleric acid) into the avermectin molecule.
Patent CA-2025539-C (CA)
Title: Spread
Inventor: NORTON IAN TIMOTHY
IPC: A23D7/00
Filed: 1990-09-17
Granted: 1996-04-23
Abstract: The present invention is concerned with a spread comprising from 15-30 wt.% of a continuous fat phase and 85-70 wt.% of an aqueous phase and further containing 1.2 to 6.0 wt.% gelatin and 1.0 to 6.0 wt.% of a starch selected from the group consisting of native intact starch, cross-linked starch, chemically modified starch and mixtures thereof.      The spread of very low fat content according the present invention offers the advantage that it is of an exceptional good quality as regards oral response, spreadability and stability.
Patent CA-2037043-C (CA)
Title: Process for the preparation of d-pantolactone
Inventor: SAKAMOTO KEIJI
IPC: C12R1/845
Filed: 1990-07-27
Granted: 1995-08-01
Abstract: A process for the preparation of D-pantolactone characterized in that specific microorganisms as described in Claim are used to convert D,L-pantolactone as the starting material into D-pantoic acid by selective asymmetric hydrolysis of the D-form only in the D,L-pantolactone, and the D-pantoic acid is then separated and converted into D-pantolactone.
Patent CA-2037052-C (CA)
Title: A method and system for inserting spinal catheters
Inventor: ANDREW DANIEL E
IPC: A61M25/01
Filed: 1990-05-24
Granted: 1995-08-01
Abstract: A method and a system for inserting spinal catheters for administration of spinal anaesthesia are disclosed. An epidural needle (10) having a hub (22) is inserted into the epidural space of a patient and a cannula (18) having a blunt end (52) is inserted into and advanced forwardly within the epidural needle for abutment against the dura-arachnoid membrane (53) to place the membrane in tension. The cannula is locked in place in the epidural needle by a securing means (32) attached to the hub of the epidural needle.  A flexible catheter (54) having a wire (58) or stylet therein with an end projecting beyond the distal end of the catheter is inserted through the cannula for piercing a hole in the tensioned dura-arachnoid membrane whereby the catheter can be inserted a predetermined distance through the dura-arachnoid membrane into the subarachnoid space. The cannula and epidural needle are removed and the wire withdrawn to allow continuous administering of an anaesthetic through the catheter. A hole can be formed in the dura-arachnoid membrane by a sharp stylet prior to insertion of the catheter.
Patent CA-2038307-C (CA)
Inventor: NITTA KATSUYUKI
IPC: C08J7/043
Filed: 1991-03-14
Granted: 2000-06-20
Abstract: Herein provided are a polypropylene resin composition which comprises (A) a polypropylene, (B) an ethylene-propylene-diene terpolymeric rubber having a Mooney viscosity, ML1+ ~ (100°C ), ranging from 5 to 50 and an iodine value of not less than 15, the content of the component (B) ranging from 10 to 50% by weight on the basis of the total weight of the components (A) and (B), and optionally (C) an inorganic filler in an amount ranging from 0 to 44 parts by weight per 100 parts by weight of the sum of the components (A) and (B); a coating method which comprises the steps of applying a primer coating to a molded product obtained by molding the foregoing polypropylene resin composition or irradiating the molded product with plasma without degreasing and washing the product with a halogen atom-containing organic solvent and then applying a top coat to the product; and a coating method which comprises the steps of degreasing and washing a molded product obtained by molding the foregoing polypropylene resin composition and then applying a top coat to the product without applying a primer coating to the molded product or irradiating the molded product with plasma. The coated film obtained according to the foregoing methods has good bond strength to the molded product.
Patent CA-2050644-C (CA)
Title: Process for the purification of insulins by chromatography
Inventor: HAEFNER LEONHARD
IPC: C07K1/16
Filed: 1991-09-04
Granted: 2001-11-27
Abstract: A process for the purification of insulins and insulin derivatives by chromatography in aqueous, buffered sol-vents which contain water-miscible organic solvents, on lipophilically modified silica gel, is described, wherein the aqueous, buffered solvents contain zwitterions, or the pH of the solvent mixture is in the vicinity of the isoelectric point of the insulin or insulin derivative to be purified and zwitterions are present.
Patent CA-2062344-C (CA)
Title: Spreader bar and overheight attachment with automatic latching mechanism
Inventor: BOOS JEFFREY JOSEPH
IPC: B66C1/10
Filed: 1992-03-05
Granted: 2001-10-02
Abstract: A cargo loading system which includes a spreader bar and overheight attachment wherein the overheight attachment incorporates an automatic latching mechanism for the purpose of locking and unlocking engagement of the spreader bar.  The automatic latching mechanism is actuated by the twistlocks of the spreader bar and serves to obviate the need for dock-side personnel and the attendant hazardous working conditions posed to these personnel by conventional mounting pin attachment of the spreader bar and overheight attachment.
Patent CA-2063701-C (CA)
Title: Modulated temperature control for environmental chamber
Inventor: BENEVELLI JOHN A
IPC: F25B41/04
Filed: 1992-03-24
Granted: 1994-10-25
Abstract: Abstract of the Disclosure A temperature-controlled environmental chamber includes a resistance heater powered through a first solid state relay and a refrigeration unit including an electrically powered thermally controlled suction throttling valve connected in the refrigerant line between the evaporator and the inlet of the compressor, and including a bimetal motor and a heating element therefor powered through a second solid state relay.  A thermostat senses the temperature in the chamber and compares it to a set point temperature and outputs a pulse-width modulated control signal indicative of the difference between the two temperatures.  The control signal directly controls the heater relays for substantially continuous variation of the heater between minimum and maximum heating conditions.  The control signal also directly controls the throttling valve relay by controlling the power to its heating element for substantially continuous variation of the valve between maximum and minimum cooling conditions, so that the amount of cooling provided is inversely proportional to the amount of heating provided.
Patent CA-2067224-C (CA)
Title: Hirudin/polyalkylene glycol conjugates
Inventor: KURFUERST MANFRED
IPC: C07K14/815
Filed: 1990-11-22
Granted: 2001-02-13
Abstract: Hirudin/polyalkylene glycol derivatives of the formula (A-(CH2)n-[O-(CH2)n]m-B-]p Hir [sic] I  and hirudin muteins and the preparation thereof are described. The compounds are suitable for controlling diseases.
Patent CA-2067542-C (CA)
Title: Method of pleating garments and pleated garments
Inventor: TAKIZAWA NAOKI
IPC: D06J1/12
Filed: 1992-04-29
Granted: 1996-10-08
Abstract: A method of pleating a garment, wherein an unfinished garment, prepared by sewing cloth parts together, is folded, rolled and twisted, and then attached to a holder.  The holder holding the garment is placed in a heat-treatment apparatus, and the unfinished garment is heat-treated and pleated at the same time in the heat-treatment apparatus filled with saturated steam.
Patent CA-2069694-C (CA)
Title: Device for introducing reagents into an organometallic vapour phase deposition apparatus
Inventor: BERTONE DANIELE
IPC: C30B25/14
Filed: 1992-05-27
Granted: 1999-01-05
Abstract: A   device   for   introducing   reagents   into organometallic vapour phase deposition apparatus is disclosed which comprises only a single valve body and does not require the pipe segments of prior known vent/run systems, thereby overcoming the problem of stagnation of gases in dead spaces of the valve.  The device comprises a valve body including gas conduit lines to carry reagent or carrier gases and pneumatic actuator means for switching gas flows between the gas conduit lines, including a pair of inlets for introducing compressed air used control the pneumatic actuator means.
Patent CA-2071072-C (CA)
Title: Shears with removable blades
Inventor: SORENSEN JOSEPH A
IPC: B26B13/04
Filed: 1992-06-11
Granted: 2001-04-24
Abstract: A hand tool comprising two cooperating members each having a handle and interconnecting arrangement for interconnecting the members in mutually overlapping relationship so as to permit movement of the members relative to one another by the handles.      At least one of the cooperating members is provided with a receiving unit adapted to movably receive a blade. The receiving unit is defined by at least an interior part thereof.      The blade comprises an elongated body having first and second cutting portions spaced from each other by a central portion. The first cutting portion is defined by at least a first cutting edge and a first rear portion. The second cutting portion is defined by at least a second cutting edge and a second rear portion.      The blade is positioned within the receiving unit of the cooperating member in such a manner that the first cutting edge faces the other cooperating member and the second cutting edge faces the interior part of the receiving unit.
Patent CA-2074691-C (CA)
Title: Information reproducing circuit
Inventor: FUJI HIROSHI
IPC: G11B20/10
Filed: 1992-07-27
Granted: 1996-09-17
Abstract: An information reproducing circuit has a generating means, having virtually the same frequency transfer characteristic as a recording means. The generating means generates a slice signal having a level larger than the negative peak and smaller than the positive peak of a signal read out from a recording medium. A comparator compares the level of the readout signal with the slice signal and converts the readout signal into a binary signal. The information reproducing circuit is designed to minimize jitter contained in the readout signal, which appears due to the frequency transfer characteristic of the recording means. This is achieved by using the level variation of the slice signal, due to the selected frequency transfer characteristic of the generating means. Therefore, the signal read out from the recording medium can be accurately converted into a binary signal even if it contains jitter. Thus, the reliability of the reproduced data can be enhanced.
Patent CA-2075118-C (CA)
Title: Chromium-free method and composition to protect aluminum
Inventor: KINDLER ANDREW
IPC: C23C22/68
Filed: 1992-07-31
Granted: 1997-03-04
Abstract: An improved method of providing a protective coating on the surface of aluminum or aluminum alloys, comprising: removing contaminants from the surface; exposing the surface to water at 50 to 100°C to form a porous coating on the surface; and exposing the boehmite -coated surface to an aqueous solution comprising a cerium salt and a metal nitrate at a temperature of 70 to 100°C. Oxides and hydroxides of cerium are formed within the pores of the boehmite to provide the protective coating, which provides corrosion resistance and improved paint adhesion.
Patent CA-2077609-C (CA)
Title: Abrasive tooth whitening dentifrice of improved stability
Inventor: NATHOO SALIM A
IPC: A61K8/24
Filed: 1992-09-04
Granted: 2003-03-25
Abstract: Abrasive dentifrice compositions containing an oxygen liberating whitening compound which is stable with respect to oxygen level and exhibits heightened and rapid whitening of teeth and stain removal which comprises a combination of a dicalcium phosphate compound and a metal ion free peroxide compound.
Patent CA-2085607-C (CA)
Title: Method for mine support and composition
Inventor: MAINE FRANK
IPC: C04B41/52
Filed: 1991-06-19
Granted: 2003-08-19
Abstract: A method and composition for providing gas-impermeable, adherent, flexible, and fire retardant coatings to rock and the like surfaces whereby the rock is supported by the caisson effect and mechanical strength properties of the coatings. The method comprises spraying a two-component polymer such as polyurethane onto a rock surface and spraying a layer of inorganic particulate material such as unexfoliated vermiculite onto the said coating of polymer with or without concurrent application of further layers of said polymer before completion of curing of the coating whereby the particulate material adheres to the polymer. An aqueous dispersion of inorganic particulate material such as vermiculite which may be in the exfoliated form can be applied onto the coating.
Patent CA-2088770-C (CA)
Title: Multiplex addressing of ferro-electric liquid crystal displays
Inventor: HUGHES JONATHAN RENNIE
IPC: G02F1/133
Filed: 1991-07-26
Granted: 2002-11-12
Abstract: A ferro-electric liquid crystal cell is addressed by row and column electrodes forming an x,y matrix of display elements. A strobe waveform is applied to each row in sequence whilst appropriate data waveforms are applied to all the column electrodes. At each display element the material receives an addressing waveform to switch it to one of its two switched states depending up-on the polarity of the addressing waveform. The switching characteristics of ferro-electric materials depend upon the shape of the addressing waveform. Two different shapes of addressing waveforms are used to produce two different and separated switching characteristics (Fig. 3). Al least one switching characteristic curve may exhibit a minimum response time at one voltage value, and the display is operated at voltages above this. The data waveforms are alternating positive and negative pulses of period 2ts. The strobe waveform has a zero for one time period is followed by a unipolar voltage pulse of duration greater than ts, e.g. 1.5ts or more. This results in an overlapping of addressing in adjacent rows, i.e. the end of a strobe pulse on one row overlaps with the beginning of a strobe pulse on the next row. The display elements may be switched into one of their two states by one of two strobe pulses of opposite polarity. Alternatively a blanking pulse may switch all elements to one state and a strobe used to switch selected elements to the other state.
Patent CA-2103098-C (CA)
Inventor: HUANG TSUN THIN
IPC: A01G9/10
Filed: 1993-11-15
Granted: 1996-06-11
Abstract: A bicomponent tissue and seedling culture bottle comprising an upper cover portion having an opening facing downward, and  a  lower  container  portion having  a  close base and suitable for fitly but detachably connecting to the downward opening of the upper cover portion, characterized in that, a T-shaped  air  vent  consisting  of  a vertical  air passage centered  at  a  top  portion  of  the  upper cover and two horizontal  air  passages  symmetrically  locating  at  and extending  from  two  opposite  sides  of  the vertical air passage to be communicable with the outside air, so that air or gas produced in the culture bottle during the culture process can escape from the air vent and germs or viruses can be prevented from entering into the culture bottle when the seedlings are matured and/or are transplanted and the survival  percent  of  the  bottle  cultured  seedlings can be raised.
Patent CA-2106967-C (CA)
Title: Thiazolidinedione derivatives, production and use thereof
Inventor: SOHDA TAKASHI
IPC: A61K31/4439
Filed: 1992-04-06
Granted: 2003-12-09
Abstract: There is disclosed a thiazolidinedione derivative of general formula (I), wherein X is -CH2- or -CO-, Q is CH3CO-, CH3CH(OR)- or -CH2COOH, when X is -CH2-, wherein R is a hydrogen atom or an acyl group, or Q is CH3CH2-, when X is -CO-, a pharmaceutically acceptable salt thereof, or a pure stereoisomeric form thereof. The thiazolidinedione derivative of general formula (I) has hypoglycemic and hypolipidemic activities.
Patent CA-2110216-C (CA)
Inventor: VULETIC BOGDAN
IPC: C21B7/00
Filed: 1993-11-29
Granted: 1999-08-03
Abstract: Abstract of the Disclosure. In a process for cooling and cleaning hot gas containing ultrafine particles, such as from a coal gasification plant, producer gas produced in a melt-down gasifier or blast furnace gas from a melting reduction plant, in a packing prewasher and then in an annular clear-ance washer, in a saturation washing stage upstream of the packing prewasher the hot gas, accompanied by substantial use of its sensible heat, by the evaporation of the supplied hot water is at least appro-ximately enriched to its saturation limit by means of steam and consequently cooled and the dust particles are wetted and in the following cooling and washing stages dust separation is assisted by a rapid condensing out of the steam.
Patent CA-2110303-C (CA)
Inventor: RIPLEY BRIAN D
IPC: H02B1/044
Filed: 1993-11-29
Granted: 1995-10-10
Abstract: The present invention pertains to a universal control console for use on domestic washing machines or dryers. The control console of the present invention extends between a pair of mounting end caps, and provides a plurality of mounting means to facilitate the mounting and attachment of controls thereto. The apertures include a central aperture having upwardly and downwardly extending rectangular apertures and a generally circular main opening. The main opening includes a pair of opposed radial notches. Below the downwardly extending rectangular aperture is a generally T- shaped aperture. Several generally tab-receiving apertures are laterally-spaced from the central aperture. The openings in the control console cooperate to mount a variety of control devices, allowing interchangeability among controls which is desirable for different appliance models. The control console of the present invention can be used with numerous models of washing and drying machines, eliminating the need to have custom-designed control consoles for each machine model.
Patent CA-2111300-C (CA)
Inventor: FOX DONALD GEORGE
IPC: A61F13/26
Filed: 1993-12-13
Granted: 2003-10-28
Abstract: A thermoplastic applicator is disclosed which exhibits accelerated breakup when immersed in water. The applicator includes a hollow, cylindrically shaped member which holds a pledget. This cylindrically shaped member is constructed of a water-soluble or water-dispersible material and has a wall with a thickness of less than about .05 inches (about 12.7 mm). A plurality of grooves are formed in the wall in a predetermined pattern to accelerate breakup of the applicator into small unrecognizable pieces. The grooves have a depth of between about 5 percent to 75 percent of the thickness of the wall. The deeper the grooves, the shorter the time period needed to breakup the applicator.
Patent CA-2114971-C (CA)
Title: Coating apparatus, method of coating glass, compounds and compositions for coating glass and coated glass substrates
Inventor: ATHEY PATRICIA RUZAKOWSKI
IPC: C03C17/245
Filed: 1994-02-04
Granted: 2000-05-16
Abstract: An apparatus for coating a glass ribbon has an exhaust on each side of a coating unit at different distances therefrom. With this arrangement, portions of the ribbon upstream and downstream of the coating unit are exposed to coating vapors from the coating unit for different periods of time. A coating mixture includes tin containing precursors and a silicon containing precursor. The silicon containing precursor has the structural formula (see formula I) where R1 is a group which does not have an oxygen available to form a peroxide, R2 is a functional group giving the silicon containing precursor the ability to be easily converted to silicon oxide coating, R3 is a bridging group to provide for multiple silicon atoms and R4 completes the bonding on the foundation silicon atom. An accelerant e.g. a phosphorus containing precursor may be used with the metal containing precursors to increase the deposition rate of the coating.      The coating deposited on the glass has regions of continuously varying weight percent of silicon oxide and tin oxide as the distance from the glass-coating interface increases, with the surface of the coating farthest from the glass-coating interface being predominantly tin oxide. The regions within the coating provide the coating with different indices of refraction to eliminate iridescence resulting from increased thickness of the tin oxide at the outer coating surface and to provide the coated glass article with a neutral color. When phosphorus is used as the accelerant, the percent of crystallinity is reduced and approaches 0, thereby reducing or eliminating the coating haze.
Patent CA-2117209-C (CA)
Title: 2-substituted-5-chlorimidazoles
Inventor: GRIFFITHS GARETH
IPC: C07D233/66
Filed: 1994-03-14
Granted: 2005-05-31
Abstract: The 2-substituted-5-chlorimidazole of the general formula (I):    wherein R represents hydrogen, a straight-chain or branched C1 to C6 alkyl group, a straight-chain or branched C2 to C6 alkenyl group, a cyclopropyl-, cyclobutyl-, cyclopentyl-, or cyclohexyl- group, or a benzyl or phenyl group optionally substituted with one or more of halogen atoms, straight-chain or branched C1 to C6 alkyl groups, nitro, or amino groups, and R1 represents hydrogen, a straight-chain or branched C1 to C6 alkyl group, a cyclopropyl-, cyclobutyl-, cyclopentyl-, or cyclohexyl- group, or a benzyl or phenyl group optionally substituted with one or more of halogen atoms, straight-chain or branched C1 to C6 alkyl groups, nitro, or amino groups, -CO2R3 or - (CH2) n-CO2R3, wherein n is from 1 to 4 and R3 represents a straight-chain or branched C1 to C6 alkyl group, is a novel intermediate for the production of anti-hypertensive pharmaceutical agents and herbicidal compounds.      There is disclosed a process for the production of these intermediates as well as a novel process for the further reaction of a 2-substituted-5-chlorimidazole (I), wherein R1 is hydrogen, to a 2-substituted-5-chlorimidazole-4-carbaldehyde of the general formula (II):