baber/WOPTO huggingface dataset:
Patent CA-2040019-C (CA)
Title: Heat-sensitive recording sheet
Inventor: FUKUCHI TADAKAZU
IPC: B41M5/333
Filed: 1991-04-08
Granted: 1999-01-05
Abstract: A heat-sensitive recording sheet of this invention comprises in a heat-sensitive color-developing layer both bis(4-hydroxyphenyl)butylacetate as an organic color-developing agent and a particular fluorane-leuco dye.  This sheet provides an intense clear image less discoloration and superior heat-resistant preservability.
Patent CA-2042439-C (CA)
Title: Process for the preparation of ketones
Inventor: DRENT EIT
IPC: B01J31/28
Filed: 1991-05-13
Granted: 2001-12-25
Abstract: A process for the preparation of ketones which comprises reacting a conjugated diolefin and water in the liquid phase in the presence of a catalyst system obtainable by combining: a) a group VIII metal compound, and b) a source of protons.
Patent CA-2044788-C (CA)
Title: Process for thawing, maturing and fermenting frozen dough for preparing bread and apparatus therefor
Inventor: OTSUKI TATSUKIYO
IPC: A23L5/30
Filed: 1991-06-17
Granted: 1997-05-06
Abstract: A process for producing bread comprising placing the frozen dough on a conductive tray in a container and applying an alternating potential to the dough using a high voltage generator which is connected to the tray and  to  the  conductive  inner wall  of  the  container through a terminal.  A container for thawing, maturing and fermenting dough is also disclosed.  The container includes an internal conductive wall, trays for dough which are of a conductive material and a terminal on the internal wall for receiving a high negative potential.          The container is covered by an insulating external wall.
Patent CA-2047282-C (CA)
Inventor: KUWANA SHOJI
IPC: E21B47/022
Filed: 1991-07-17
Granted: 2001-01-30
Abstract: An attitude control device has a plurality of harmonic drive mechanisms of the hollow type, preferably first and second harmonic drive mechanisms. First and second rotational members are connected to the outputs of the first and second harmonic drive mechanisms. These rotational members have eccentric hollow portions which rotate eccentrically around the rotational axes of the harmonic drive mechanisms. A member to be driven is placed to extend through the eccentric hollow portions such that it is supportedly contacted with the inner surfaces of the eccentric hollow portions. In operation, the eccentric hollow portions are rotated relative to each other, whereby the member to be driven is controllably oriented to a desired direction.      The attitude control device can be employed as a drilling-direction control device wherein a rotational drill shaft is supported by inner surfaces of eccentric hollow portions of first and second rotational members. These rotational members are rotated by first and second harmonic drive mechanisms. By rotating the eccentric hollow portions, the rotational drilling shaft is changed in orientation from the vertical direction.
Patent CA-2049056-C (CA)
Inventor: AEBISCHER PATRICK
IPC: A61K35/13
Filed: 1991-01-28
Granted: 1999-07-27
Abstract: Living cells (56) which produce biologically active factors can be encapsulated within a semipermeable, polymeric membrane by co-extruding an aqueous cell suspension (54) and a polymeric solution (52) through a common port (14) to form a tubular extrudate (12) having a polymeric membrane which encapsulates the cell suspension. For example, the cell suspension and the polymeric solution can be extruded through a common extrusion port having at least two concentric bores (16 and 18), such that the cell suspension is estruded through the inner bore (16) and the polymeric solution is extruded through the outer bore (18). The polymeric solution coagulates to form an outer coating or membrane. As the outer membrane is formed, the ends of the tubular extrudate can be sealed to form a cell capsule. In one embodiment, the tubular extrudate is sealed at intervals to define separate cell compartments connected by polymeric links (58). In another embodiment, a cell capsule connected to a tethering filament (59) can be formed.
Patent CA-2051838-C (CA)
Title: Metallothermic reduction of rare earth fluorides
Inventor: SHARMA RAM AUTAR
IPC: C22B5/04
Filed: 1991-09-19
Granted: 1996-07-23
Abstract: A process is disclosed for the calcium reduction of rare earth fluorides, especially neodymium and/or praseodymium fluorides, in a minimum volume stirred molten calcium chloride reaction medium that produces high yield, high quality rare earth alloy with a calcium fluoride byproduct that can be recycled to generate more rare earth fluoride starting material.
Patent CA-2055554-C (CA)
Title: Multimedia system
Inventor: FREEMAN BOBBY JOE
IPC: H04H60/04
Filed: 1991-11-14
Granted: 1998-04-14
Abstract: An information handling apparatus for transferring and composing image signals including a plurality of media sources configured to provide a corresponding plurality of image signals, a media bus connected to the media sources, and a media control module coupled to the media bus. The media bus allows selective access for the plurality of image signals. The selective access enables composition of the independent image signals in response to control information. The media control module receives a composed image signal from the media bus and provides the composed image signal to a display device.
Patent CA-2056925-C (CA)
Inventor: HALL DOUGLAS WARREN
IPC: G02F1/35
Filed: 1991-12-04
Granted: 2002-10-01
Abstract: Disclosed is a fiber amplifier system in which a gain fiber is operatively combined with a fiber optic coupler having first and second coupler optical fibers. The coupler fibers are fused together along a portion of their lengths to form a wavelength dependent coupling region whereby most of the light power of a wavelength .lambda.s couples between them, and most of the light power of a wavelength .lambda.p that is introduced into the first fiber remains in it.     The mode field diameter of the first coupler fiber is substantially matched to that of the gain fiber and is smaller than that of the second coupler fiber. One end of the first coupler fiber is spliced to the gain fiber. A transmission fiber is spliced to the second coupler fiber, and a laser diode introduces pumping light of wavelength .lambda.p to the first coupler fiber. The fiber optic coupler preferably includes an elongated body of matrix glass through which the first and second coupler fibers extend.      The matrix glass has a refractive index n3 that is lower than that of the fiber claddings. The fibers are fused together along with the midregion of the matrix glass, the fiber cores being more closely spaced at the central portion of the midregion than at the body endfaces, thereby forming the coupling region.
Patent CA-2062114-C (CA)
Inventor: MACY DAVID F
IPC: G01C19/5607
Filed: 1992-03-02
Granted: 2001-02-27
Abstract: Single ended tuning fork inertial sensor having a housing and a single ended tuning fork of a quartz-like material of a predetermined thickness, the tuning fork has first and second tines lying in a plane and having an axis of symmetry and has a body formed integral with said first and second tines. The body is rigidly secured to the housing. The tines have a rectangular cross section and have a width which is different from the thickness. The body has a stem formed therein which has a width less than that of the body. Drive electrodes are secured to the tines. An oscillatory frequency is supplied to the above drive electrodes to excite the tines in a drive mode and in the presence of an axial angular rate to cause the tines to operate in a pickup mode which is substantially separated in frequency from the drive mode.
Patent CA-2063615-C (CA)
Inventor: RAO PURUSHOTHAMA
IPC: H01M10/34
Filed: 1992-03-20
Granted: 2002-08-13
Abstract: Automotive SLI lead-acid batteries are disclosed which are characterized by enhanced resistance to positive grid corrosion, even when exposed to the current, relatively high under-the-hood service temperatures in use with recent model automobiles. The grids are formed from either a cast lead-based alloy including from about 0.025 to 0.06% calcium, from about 0.3 to 0.7% tin and from about 0.015 to 0.045% silver, the percentages being based upon the weight of the alloy prior to casting or a wrought lead-based alloy including from about 0.02 to 0.05% calcium, from about 0.3 to 0.5% tin and 0.02 to 0.045% silver, the percentages being based upon the weight of the alloy. Aluminum in an amount of from about 0.008 to about 0.012%, based upon the as-added total weight of the alloy may be used to maintain the desired calcium content during casting.
Patent CA-2072056-C (CA)
Title: Disc for recording information signals
Inventor: TAKAHASHI KENJI
IPC: G11B23/00
Filed: 1992-06-23
Granted: 2001-09-04
Abstract: A disc for recording information signals includes a disc substrate of a synthetic resin having a center hole and an information signal recording layer formed on one major surface and a magnetic plate arranged on the major surface for closing the center hole. A recess for accommodating the magnetic plate is formed on the major surface of the disc substrate for surrounding the center hole. At least a part of the rim of the recess is thermally deformed for forming one or more lugs for holding the magnetic plate disposed in the recess with respect to the disc substrate by the lug(s).
Patent CA-2072627-C (CA)
Title: Recombinant herpes simplex viruses vaccines and methods
Inventor: ROIZMAN BERNARD
IPC: A61K39/00
Filed: 1991-09-10
Granted: 2003-12-16
Abstract: A virus is disclosed which is rendered avirulent by prevention of expression of an active product of a gene which is designated as.gamma. 1 34.5, which maps in the inverted repeats flanking the long unique sequence of herpes simplex virus DNA, and which is not essential for viral growth in cell culture. Viruses from which the gene was deleted or which carried stop codons are totally avirulent on intracerebral inoculation of mice.
Patent CA-2073811-C (CA)
Title: Plug for molten metal refining vessel
Inventor: OKUMURA TOMOHIRO
IPC: B22D1/00
Filed: 1992-07-14
Granted: 1996-05-28
Abstract: A plug for a molten metal refining vessel, which comprises: a plug body to be releasably attached to an opening provided in a wall of a molten metal refining vessel, the plug body comprising a non-porous refractory with a porosity of up to 20%; and a plurality of gas blowing apertures formed in the plug body and running through the plug body in the axial direction thereof.  Each of the above-mentioned plurality of gas blowing apertures comprises a slit, and the slit has substantially a rectangular shape having a length of the shorter side thereof within a range of from 0.08 to 0.25 mm.  Each gas blowing aperture should preferably have a cross-sectional area of at least 2 mm and the total amount of the cross-sectional areas of the plurality of gas blowing apertures should preferably be limited to up to 20% relative to the area of the upper end face of the plug body.
Patent CA-2075286-C (CA)
Title: Use of zwitterions to mobilize isoelectrically focused ampholyte zones
Inventor: ZHU MING-DE
IPC: C25B7/00
Filed: 1991-12-12
Granted: 1998-09-29
Abstract: Ampholytic solute zones which have been stabilized by isoelectrical focusing in a separation medium such as a capillary are mobilized by the introduction of a relatively large quantity of zwitterion to one of the electrode chambers. When a voltage is then applied between the electrode chambers as in the focusing stage, the zwitterion migrates into the separation medium in accordance with the isoelectric point of the zwitterion. The voltage is maintained to cause continuous migration of the zwitterion into the capillary, thereby forming an expanding zone which displaces the focused zones formed in the focusing stage and causes then to travel axially through the capillary toward a detection point or out of the capillary for purposes of recovery.
Patent CA-2079738-C (CA)
Title: Toy nursing bottle for a doll
Inventor: GREENBERG LAWRENCE J
IPC: A63H33/30
Filed: 1992-10-02
Granted: 1997-03-25
Abstract: A toy nursing bottle for simulating emptying of the bottle when the doll is "drinking" and "filling" the bottle from a can or the like.  The bottle body is formed of outer and inner shells defining a liquid receiving chamber therebetween, a nipple member mounted on the bottle body and having a liquid receiving reservoir, and a valve that con-trols flow of liquid between the liquid receiving chamber and the liquid receiving reservoir.  A rod extends from the valve member through the reservoir and into the nipple, so that it moves, when the nipple is depressed, to open the valve.  Any surface on a container, such as a can, bottle or cardboard container or the like, may be used to depress the nipple to open the valve.
Patent CA-2081605-C (CA)
Inventor: GRACZYK ALFREDA
IPC: C07D207/30
Filed: 1992-10-28
Granted: 2002-02-26
Abstract: New complex salts of hematoporphyrin and of its derivatives have general formula 1, in which R1 and R2 are identical or different and denote the -CH=CH2, -CH/OH/-CH3 or CH/OR3/-CH3 groups, where R3 represents the group forming the oligomer con-twining ethereal and/or ester bindings, this group comprising from 1 to 5 identical or different units derived from monomer of formula 2 or R1 and R2 are identical and denote the CH/R4/-CH3 group, where R4 represents the groups: carboxymethylamino, 1-carboxypenthylamino, 1-carboxy-2-methylpropylamino, 1-carboxy--3-methyl-butylamino, 1-carboxy-2-methyl-butylamino, 1-carboxy-butylamino, 1-carboxypentylamino, 1-carboxy-2-hydroxyethylamino, 1-carboxy-2-hydroxy-propylamino, 1-carboxy-2-mercapto-ethylamino, 1-carboxy-3-methylthio-propylamino, 1,2-dicarboxy-ethylamino, 1-carboxy-2-carbamoyl-ethylamino, 1,3-dicarboxy-propylamino, 1-carboxy-3-carbamoyl-propylamino, 1-carboxy-2-phenyl-ethylamino, 1-carboxy-2-/4-hydroxyphenyl/-ethylamino, 1-carboxy-2-indolyl--ethylamino, 2-carboxy-pyrrolidinyl, 2-carboxy-4-hydroxy-pyr-rolidinyl, 1-carboxy-5-amino-pentylamino, 1-carboxy-4-guanidyl--butylamina, 1-carboxy-4-hydroxy-5-amino-pentylamino or 1-car-boxy-2-/1H-imidazole/-ethylamino group; A signifies a basic amino acid; m amounts to 2-6, n is 1-5 are disclosed.      The method for preparation of new complex salts of formula 1 consists of reacting, with a basic amino acid, of hematoporphy-rin derivatives of general formula 4, in which R1 and R2 have the above-stated meaning.      The new complex salts are used as a therapeutic agent for detection and treatment of neoplasms,
Patent CA-2084734-C (CA)
Title: Iontophoresis system having features for reducing skin irritation
Inventor: HAYNES JOHN L
IPC: A61N1/32
Filed: 1992-12-07
Granted: 1998-12-01
Abstract: An iontophoresis drug delivery system includes a device which is attachable to the skin of an animal and having a drug reservoir,  an electrolyte reservoir,  and electrodes electrically communicating with the reservoirs and with the skin of the animal,  An electronic circuit for controlling the rate or amount of current or voltage applied to the electrodes of the device includes a constant voltage and current generator,  and a switching circuit for switching between applying either a constant current to the electrodes or a constant voltage.  Current and voltage sensors are attached to the electrodes and provide feedback signals which are compared with predetermined threshold signals to control through feedback the amount of constant voltage and constant current applied to the electrodes.
Patent CA-2092207-C (CA)
Title: Corrosion inhibition of calcium chloride brine
Inventor: ZEFFERI SUZANNE M
IPC: C23F11/167
Filed: 1993-03-23
Granted: 2004-02-03
Abstract: A method of inhibiting corrosion of metals such as low carbon steel in contact with calcium chloride brine comprising adding to the brine or to the salt prior to dissolution 2-hydroxyphosphono-acetic acid.
Patent CA-2092728-C (CA)
Title: Stab joint coupler
Inventor: SMITH PETER JOHN
IPC: F16L21/03
Filed: 1993-03-26
Granted: 1997-05-06
Abstract: A stab joint coupling, for joining corrugated pipes, has a male connector and a female connector both having means for attachment to a first and second piece of pipe by engaging the corrugation of the pipe.  A circumferential elastomeric sealing means is positioned between the joined coupling connectors to effect a substantial liquid seal for the joint.  The coupling permits two pieces of corrugated pipe to be joined relatively inexpensively and quickly by workers in the field.
Patent CA-2104978-C (CA)
Inventor: OKAJIMA HISAKAZU
IPC: G02F1/03
Filed: 1993-08-27
Granted: 1998-06-16
Abstract: An optical voltage electric field sensor of the type which includes a light source, a polarizer for linearly polarizing an incident light beam emanated from the light source, and a phase plate, a Pockels element and an analyzer arranged in series on the transmission path of the linearly polarized light beam and includes a first light-receiving element arranged to receive a S-polarized light beam from the analyzer for converting the S-polarized light beam into a first electric signal V1 indicative of the intensity of the light beam, and a second light-receiving element arranged to receive a P-polarized light beam from the analyzer for converting the P-polarized light beam into a second electric signal indicative of the intensity of the light beam.  The sensor further includes a first calculation circuit for calculating an equation V11 = (V1 - DC1)/DC1 (where DC1 is a direct current component of the first electric signal) to produce an output V11 therefrom, a second circulation circuit for calculating an equation V22 = (V2 - DC2)/DC2 (where DC2 is a direct current component of the second electric signal) to produce an output V22 therefrom, and a third calculation circuit for calculating an equation V3 = 1/[(.alpha./V11) - (.beta./V22)] (where .alpha. and .beta. are constants) to produce an output V3 for measurement of the applied voltage or electric field.
Patent CA-2109226-C (CA)
Inventor: NIEDERST KEN W
IPC: C08J7/046
Filed: 1992-02-24
Granted: 1995-12-05
Abstract: Pressurizable thermoplastic containers, such as those made from polyethylene terephthalate containing a polyurethane lay-er on the exterior surface thereof are disclosed. The polyurethane layer which is typically applied by a coating process provides the bottle with resistance to stress cracking. The containers are useful as refillable bottles for carbonated beverages which have a tendency to stress crack.
Patent CA-2111881-C (CA)
Inventor: ROCKOWER GERALD
IPC: E21B7/30
Filed: 1993-12-20
Granted: 1997-01-21
Abstract: A cutting/expanding    tool includes a cylindrical support body having a guide side and a cutting side, a pair of guide rollers mounted in tandem along the longitudinal axis of the support body on the guide side, a cutting wheel mounted between the tandem guide rollers on the cutting side of the support body, and an expander connected rearwardly of the support body.  A plurality of cutting wheels may also be provided, each of progressively increasing diameter.  A scoring wheel may be mounted forwardly of the cutting wheels to prescore the surface to be cut, 80 as to facilitate the cutting action, and a deburrer may be mounted rearwardly of all the cutting wheels 80 as to smooth the cut edge.  A method of using the cutting/expanding  tool is also described, whereby after the tool has been propelled through a buried main to cut and to expand it, a replacement main is drawn back through the existing main.  A conical, wedge or pie shaped expander may be used.
Patent CA-2112204-C (CA)
Inventor: STIE KENNETH EARL
IPC: F25B43/04
Filed: 1993-12-22
Granted: 1999-06-15
Abstract: The presence of an undesirable quantity of noncondensible gases in a refrigeration unit is inferred as a function of both the vapor pressure and temperature at a selected point in the refrigeration unit where the noncondensible gases tend to gather.  Purging of these noncondensible gases, which contaminate the refrigerant, is responsive to a comparison in a programmable controller of the actual vapor pressure measured at the selected point, and the known pressure of uncontaminated refrigerant at the temperature existing at the selected point.   On detecting a difference between these pressures that is greater than a desired value, the controller calculates a control output signal needed to purge a volume of contaminated vapor from the unit that is effective for reducing the difference between the measured pressure of contaminated refrigerant and the known pressure of uncontaminated refrigerant to a desired value.
Patent CA-2113456-C (CA)
Title: Living carbocationic polymerization process
Inventor: FAUST RUDOLF
IPC: C08F12/08
Filed: 1992-06-24
Granted: 1999-09-28
Abstract: An olefin polymerization process is provided wherein an olefin chargestock is contacted with an organic compound polymerization initiator, a Lewis acid coinitiator and a pyridine compound such as 2,6-di-tert-butylpyridine to produce homopolymers, copolymers or block copolymers having a narrow molecular weight distribution.
Patent CA-2115906-C (CA)
Title: Photosensitization of optical fiber and silica waveguides
Inventor: ALBERT JACQUES
IPC: G02B6/10
Filed: 1994-02-17
Granted: 2001-12-25
Abstract: A method of fabricating a strongly photosensitive optical waveguide is comprised of locally heating at least a portion of a weakly photosensitive optical waveguide for a period of time sufficient to increase the density of defects associated with photosensitivity in the heated portion of the waveguide core.
Patent CA-2116869-C (CA)
Title: Apparatus for arresting the progress of vehicles
Inventor: BEHAN KEVIN
IPC: E01F13/12
Filed: 1992-09-01
Granted: 2003-05-20
Abstract: The apparatus comprises a plurality of modules (1) from which a number of blades (6) can protrude or be retracted to re-spectively arrest or allow the passage of vehicles thereover. The modules are interconnected by means which enable effects such as the camber of a road surface, or misalignment of the modules to be compensated for.
Patent CA-2124787-C (CA)
Title: Citrates acyles, esters precurseurs de peracides
Inventor: HARDY FREDERICK E
IPC: C07C69/67
Filed: 1992-12-04
Granted: 1998-10-27
Abstract: La présente invention porte sur des citrates acylés utiles comme précurseurs de peracides dans un procédé de blanchiment ou de désinfection.  La présente invention porte également sur l'emploi de ces esters citrates acylés, ainsi que sur des compositions granulaires ou liquides à base desdits esters citrates acylés.  On décrit des compositions activatrices ainsi que des compositions de blanchiment activées.
Patent CA-2126120-C (CA)
Inventor: KAHLE JAMES ALLAN
IPC: G06F12/08
Filed: 1994-06-17
Granted: 1999-06-22
Abstract: An information processing system and method of operation are provided. In response to a first instruction, a supplemental memory stores first information from a system memory.  In response to a second instruction, a cache memory stores second information  from  the  supplemental  memory  if  the  first information includes the  second information and from the system memory otherwise.
Patent CA-2126138-C (CA)
Title: Transgenic fish and vectors therefor
Inventor: DEVLIN ROBERT H
IPC: C12N15/85
Filed: 1994-06-17
Granted: 2001-08-21
Abstract: Sockeye salmon growth hormone genes Types 1 and 2, and sockeye histone and metallothionein gene promoters have been isolated and sequenced. Terminator sequences for the growth hormone gene have been found. Vectors containing these promoter and terminator sequences (and intermediate sequences) have been prepared and used to transform fish egg cells. Transformed fish egg cells have been grown into transgenic fish. In the case of inserted full-length growth hormone gene, both accelerated growth and early smoltification were observed. An aspect found beneficial is to combine homologous fish metallothionein or histone gene promoter with fish gene, preferably growth hormone gene, terminator in the same vector, for preparing transgenic fish.