baber/WOPTO huggingface dataset:
Patent CA-1328627-C (CA)
Title: Filter media for filter systems
Inventor: HENSLEY CLIFFORD J
IPC: B01D29/62
Filed: 1988-09-22
Granted: 1994-04-19
Abstract: ABSTRACT    A stream of contaminated liquid flows into a vessel, through a filter media comprised of at least 50% pecan hulls, while clean liquid exits the vessel, leaving the contaminants deposited on the filter media.  The deposited contaminants are scrubbed from the media by circulating the media along a toroidal flow path within the vessel until the contaminants have been transferred from the media into the liquid.  The scrubbing action is achieved by a pump suction which is spaced from a pump discharge.  The pump discharges through a perforated nozzle.  The nozzle extends through a housing.  An annulus is formed between the nozzle and the housing.  Dirty scrub water flows from the pump, through the nozzle perforations, into the annulus, and away from the vessel, while at the same time the toroidal flow path is maintained.
Patent CA-1327973-C (CA)
Inventor: MALDONADO RENE
IPC: C11D3/37
Filed: 1988-09-30
Granted: 1994-03-22
Abstract: SULFOAROYL END-CAPPED ESTER OLIGOMERS SUITABLE AS SOIL-RELEASE AGENTS IN DETERGENT COMPOSITIONS          AND FABRIC-CONDITIONER ARTICLES   ABSTRACT OF THE DISCLOSURE      Anionic, especially sulfoaroyl, NaO3S(C6H4)C(O)- preferred, end-capped esters useful as soil release agents in detergent compositions and fabric-conditioner articles. The terephthalate esters contain unsymmetrically substituted oxy-1,2-alkyleneoxy units (oxy-1,2-propyleneoxy units preferred).
Patent CA-1307880-C (CA)
Title: Thermally stable joints between materials with different thermal expansion coefficients
Inventor: MILLER BRADLEY J
IPC: C04B37/02
Filed: 1988-10-05
Granted: 1992-09-29
Abstract: ABSTRACT OF THE DISCLOSURE    Crack free, large area joints between metals and ceramics, including ceramics such as silicon nitride and silicon carbide with very low coefficients of thermal expansion, can be made by tapering the ceramic in the vicinity of the bond terminus of the joint.  The degree of taper required can be predicted by finite element analysis of the stresses developed in a hypothetical joint.  The joint does not require, but can use if de-sired, highly ductile intermediate layers.
Patent CA-1333966-C (CA)
Title: Silver halide photographic materials
Inventor: OHSHIMA NAOTO
IPC: G03C1/015
Filed: 1988-10-17
Granted: 1995-01-17
Abstract: A silver halide photographic material comprising at least one photosensitive emulsion layer contains silver halide grains on a support.   In the silver halide photo-graphic  material,    (1)  the  silver  halide  grains  are prepared in the presence of iridium compounds,   (2)  the silver halide grains consist of silver chlorobromide which is essentially free of silver iodide,   (3)  at least 90 mol% of all silver halide from which the silver halide grains are made is silver chloride,  (4) the silver halide grains have localized phase in which the silver bromide content exceeds at least 20 mol%,  (5) the localized phase is precipitated together with at  least  50%  of all  the iridium which  is  added  during  the  preparation  of  the silver halide grains, and   (6) the surface of the silver halide grains is chemically sensitized to the extent that the grains are essentially of the surface latent  image type.
Patent CA-1333391-C (CA)
Title: Therapeutic nucleosides
Inventor: BURNS CHARLENE L
IPC: A61K31/708
Filed: 1988-11-04
Granted: 1994-12-06
Abstract: 3'-Fluoropyrimidine  and  purine  nucleosides of the general formula (I):              (I) wherein B represents a group of formula           (A)        OR            (B) in which R1 represents a chlorine or iodine atom, R2 represents a hydrogen atom or an amino group and R3 represents  a C3-6 cycloalkylamino,  C1-6  straight or branched chain alkoxy, C3-7 cycloalkoxy or a 5- or 6-membered  heterocyclic  ring  bonded  to  the  purine residue via a nitrogen atom in the said ring,  have been   found   to   have   potent   antiviral   activity particularly  against  Human  Immunodeficiency  Virus (HIV).
Patent CA-1307150-C (CA)
Title: Retroreflective sheet material and method of making same
Inventor: MARTIN DAVID C
IPC: G02B5/124
Filed: 1988-11-23
Granted: 1992-09-08
Abstract: ABSTRACT    A retroreflective  sheeting has  microretroreflective formations on one surface which are partially metallized and partially exposed to the atmosphere about them.   It is produced by forming a coating on microprism surface, and this coating includes a thin metallic deposit over substantially the entire surface and a second coating material over only a portion of the surface.  The coated surface is then exposed to a solvent to remove the coating from its predominant area and leave the metal deposit on only a minor portion of the area.          A backing sheet is then applied over the microprisms and bonded to the retroreflective sheeting so as to leave an air interface about the predominant area of the microprisms.  As a result,  some light rays are retroreflected by the metal deposit  and  some  are  retroreflected by the atmosphere interface.  The sheeting exhibits daytime whiteness over the bulk of its surface area.
Patent CA-1314159-C (CA)
Title: Dental hygiene device
Inventor: ENGEL L DAVID
IPC: A61C3/03
Filed: 1988-11-24
Granted: 1993-03-09
Abstract: DENTAL HYGIENE DEVICE            Abstract of the Disclosure A method and apparatus for demobilizing the motile subgingival bacteria and for removing soft plaque from the teeth on a substantially daily basis as a means to prevent, treat and/or limit periodontal diseases.  A piezoelectric multi-morph transducer is used to generate low-energy vibrations, these vibrations are applied to the teeth and gingival fluids to cause mild cavitation within the fluid to remove subgingival plaque and to demobilize motile bacteria.  Means for driving the transducer at its resonant frequency or multiples thereof and for electrically isolating the user are included.
Patent CA-1326417-C (CA)
Inventor: KURTZ LEONARD D
IPC: A61M1/02
Filed: 1988-11-28
Granted: 1994-01-25
Abstract: LIQUID REINFUSION BAG SYSTEM            ABSTRACT OF THE DISCLOSURE      A  liquid  reinfusion  bag  system  is  provided  for collecting blood from a surgical site and/or reinfusing the collected blood into the patient.  The system includes a flexible bag having an external frame with locking means to retain the bag in extended position during the time the bag is being filled, the locking means being displaceable to  permit  the  bag  to  collapse  during  the  reinfusion process.
Patent CA-1317783-C (CA)
Title: Optoelectrical particle detection apparatus
Inventor: SAWADA SHIGETOMO
IPC: G01N21/51
Filed: 1988-12-16
Granted: 1993-05-18
Abstract: OPTOELECTRICAL PARTICLE DETECTION APPARATUS     ABSTRACT OF THE DISCLOSURE     A optoelectrical particle detection apparatus comprising concave and convex reflectors spaced from each other by a predetermined distance, a laser source for emitting a laser beam and introducing the laser beam between the concave and convex reflectors, the concave and convex reflectors and the laser source being arranged so that the laser beam is multi-reflected at a much closer pitch to form a laser beam curtain in which the multi-reflected beam segments are overlapped with respect to each other to enhance a light intensity thereof, and a optoelectrical detector for receiving light scattered due to a presence of particles in the laser beam curtain, whereby the presence of particles can be detected in the laser beam curtain with a high probability and a high sensitivity.
Patent CA-1309480-C (CA)
Title: Packet-switched cellular telephone system
Inventor: FELIX KENNETH A
IPC: H04W36/08
Filed: 1988-12-22
Granted: 1992-10-27
Abstract: Abstract of the Disclosure A unique packet-switched cellular telephone system includes a cellular switch (140) and base sites (110) for providing packet-switched data services to cellular data telephones (102).  Cellular switch (140) includes packet access points (152, 153) coupled to a packet network and T1 span lines (160, 161) coupled to the landline telephone network.  Base sites (110) are coupled to cellular switch (140) by T1 span lines (164, 165) in which all time slots are clear channels and one time slot is dedicated for common channel signalling.   Multiple data calls are assigned to each packet-mode radio channel thereby conserving valuable radio channel spectrum.  Data calls are handed off from one packet-mode radio channel to another on the basis of cellular data telephone movement, signal strength, and/or bit-error rate, or on the basis of radio channel data packet capacity, data packet traffic, and/or data packet throughout.
Patent CA-1308527-C (CA)
Inventor: KRAWAGNA LOUIS A
IPC: E05D1/02
Filed: 1989-02-15
Granted: 1992-10-13
Abstract: ABSTRACT            A bi-stable hinge unit (10) of elastic material connects two inflexible end portions (12, 13) to take up two stable positions on either side of an intermediate unstable position.  The hinge unit (10) comprises two equal elements (14, 15), each of which having two cantilever arms (18, 20), linked to each other by two folding lines (22) acting as a "living" hinge.  A triangular rigid plate (16) is arranged between and defined by said folding lines (22).  The elements (14, 15) are arranged substantially parallel to each other with a distance therebetween and forming the main hinge line between said end portions (12, 13). By swinging said end portions (12, 13) toward each other along said main hinge line, the four cantilever arms (18, 20) will start to deflect and act as springs and the two triangular plates (16) will rotate through approximately 180° in a plane normal to the elements (14, 15).  Figure 1.
Patent CA-1329417-C (CA)
Inventor: HOLCOMB ROBERT R
IPC: A61N2/06
Filed: 1989-03-21
Granted: 1994-05-10
Abstract: ABSTRACT OF THE DISCLOSURE        A therapeutic permanent magnet device adapted for pain relieving placement on the bodies of living animals is provided.  The device includes a plurality of magnet bodies having two positive and two negative magnetic poles and a containment body for holding the magnet bodies in a fixed orientation.  A method for therapeutically placing the permanent magnet device on the human body to relieve pain is also provided.
Patent CA-1335319-C (CA)
Inventor: GASTINGER ROBERT G
IPC: C08F283/06
Filed: 1989-05-01
Granted: 1995-04-18
Abstract: Very low viscosity polymer polyol having high styrene/acrylo-nitrile ratios and good stability may be achieved by the use of epoxy resin-modified polyols as a dispersant. The epoxy resin-modified polyols useful as dispersants may be made by reacting a polyol initiator having an active hydrogen functionality of 3 to 8 and one or more alkylene oxides with an epoxy resin. It is preferred that all of the epoxy resin-modified base polyol dispersant be initially charged to the reactor, along with part of the base polyol. In this invention, the base polyol is a conventional polyol unmodified with epoxy resin. The use of epoxy resin-modified polyols as dispersants results in polymer polyols having higher styrene contents, and improved stability and viscosity properties.
Patent CA-1312457-C (CA)
Title: Device for the in situ repair of a pipe
Inventor: FREY ANDRE F
IPC: F16L55/18
Filed: 1989-06-12
Granted: 1993-01-12
Abstract: ABSTRACT OF THE DISCLOSURE           A device for the in situ repair of pipes (eg stormwater or sewerage)  inaccessible from the inside, comprises a front module and a rear module each module being fitted with mobile arms and hydraulic displacement means connectable to an hydraulic pump at surface level.  In their inoperative position, the arms form a diameter which is much smaller than that of the pipe to be repaired.   In their operative position, the arms form a diameter which is either similar to or slightly smaller than that of the pipe to be repaired.  The front module thus, through the pressure exerted by the arms on the damaged inside walls of the pipe, act both as a widener and as a guide, to restore the pipe to its original diameter and to facilitate passage along the pipe of the rear module.  The rear module is fitted at each end thereof with sealing elements which,  in conjunction with the pipe, define a chamber into which leads at least one tube for feeding sealing product, the tube being connectable to a pump at surface level.
Patent CA-1309914-C (CA)
Title: Infusion pump
Inventor: GROSHONG LEROY E
IPC: A61M5/00
Filed: 1989-06-13
Granted: 1992-11-10
Abstract: INFUSION PUMP                        ABSTRACT An infusion pump for administering fluid from a fluid source to a patient comprises a base member having an electric motor for driving a fluid pump housed within a cassette detachably mountable on the base and connectable to the motor.  The cassette houses a reciprocative piston and cylinder assembly which both pumps fluid to the patient while simultaneously drawing fluid from the fluid source so as to maintain a contin-uous flow rate of fluid to the patient.  The cassette also houses deformably closable pairs of tubes con-necting each of the pump's two fluid chambers to the cassette inlet and outlet, respectively, to provide the necessary valving to produce continuous flow in coop-eration with the reciprocative piston and cylinder assembly.  The fluid flow rate is adjustably controlled by a microcomputer which regulates the motor by repeat-edly initiating electric motor driving pulses at a pre-determined time rate, and terminating them in response to the advancement of the motor beyond one of a plurality of predetermined positions so as to maximize accuracy and reliability of flow rate while compatibly maximizing the power efficiency of the motor for portable applications requiring a battery power source.
Patent CA-1278406-C (CA)
Inventor: REMOND MICHEL
IPC: B29C35/02
Filed: 1989-07-10
Granted: 1991-01-02
Abstract: ABSTRACT OF THE DISCLOSURE:           A method and an apparatus for manufacturing a pre-vulcanized tread having an outer face with a tread pattern and a sole.  The apparatus comprises a molding ring for the sole of the tread, a molding arm for the tread pattern, and heating elements for vulcanizing the tread.   The ring defines in closed position at least in part a first quasi-cylindrical surface and the arm defines in closed position at least in part a second coaxial quasi-cylindrical surface located radially outward of the first surface.  The ring and the arm in closed position are immovable with respect to each other and are imparted a movement of rotation around the axis of the surfaces.   The ring and the arm define during the molding and vulcanizing of the tread a continuous molding space arranged as a circular arc of less than 360°.
Patent CA-1311094-C (CA)
Title: Bridge construction
Inventor: DILGER WALTER H
IPC: E01D19/14
Filed: 1989-07-12
Granted: 1992-12-08
Abstract: Abstract The invention relates to a method of constructing a cable-stayed bridge extending between at least three towers.  Initially, a horizontally extending truss spanning from a first tower to a second tower is moved longitudinally to be projected from the second tower to a third tower.  The truss is then elevated.  A plurality of stay cables are then strung from an elevated location on the second tower to a series of temporary connections to the truss on both sides of the second tower.  A deck portion is then constructed on the truss on both sides of the second tower, and the cables that are not connected to the truss are connected to this deck portion.  Finally, the cables are disconnected from the truss and the truss and hence the deck portion are lowered, causing the cables to support the weight of the deck and to acquire the desired tensional stresses.  The procedure is faster than hitherto known methods of constructing this type of bridge. The truss, which could be used to aid in the construction of any bridge over a body of water, has air filled tanks that can be moved vertically.  This enables the tanks to be lowered and submerged in the body of water to provide upward supporting forces on the truss while it extends between the towers.
Patent CA-1308552-C (CA)
Title: Dryer section apparatus
Inventor: WEDEL GREGORY L
IPC: D21F5/04
Filed: 1989-09-05
Granted: 1992-10-13
Abstract: ABSTRACT OF THE DISCLOSURE      A dryer section apparatus is disclosed for drying a web.  The apparatus includes a first, and second tier of dryers which include, respectively, a first second dryer and a third dryer.  The arrangement is such that the web moves from the first dryer towards and around the third dryer and subsequently to and around the second dryer.  A transfer roll is disposed between the first,  second and third dryers such that the distance between the transfer roll and the first dryer is less than the distance between the transfer roll and the second dryer.   A dryer felt extends contiguously with the web around the first dryer with the felt then extending around the transfer roll and thereafter around the second dryer such that a pocket is defined between the web extending between the dryers, the third dryer and the felt.  A blow box is disposed between the roll and the first and second dryers with the box being disposed outside the pocket for blowing a first current of air into the pocket through the felt extending between the first  dryer and the  roll.   The  first  current  of  air augments  a  first  flow of  air  flowing  into the pocket through the felt extending between the first dryer and the roll to balance a second flow of air flowing out of the pocket through the felt extending between the roll and the second dryer.
Patent CA-1293432-C (CA)
Title: Method and apparatus for use in manufacturing safety glass laminated
Inventor: MEUSSNER MARK A
IPC: B32B17/10
Filed: 1989-09-14
Granted: 1991-12-24
Abstract: Abstract of the Disclosure Apparatus operable in accordance with the method of the present invention is provided for automatically controlling the operation of a de-air/tacker machine used in the manufacture of safety glass laminates to remove air from and promote bonding within the laminates.  The machine comprises pinch rolls mounted to a carriage which is in turn mounted for rotational movement about a generally horizontal axis relative to a support frame.  The pinch rolls define a pressure nip through which the laminates pass to be processed.  A motor is connected to the carriage for rotating the carriage, and hence the pinch rolls, about the generally horizontal axis and a digital encoder is provided for sensing rotational operating movement of the motor.  A computer is connected to the motor and the encoder for operating the motor in accordance with a predefined sequence for each laminate which is processed such that the carriage is positioned to maintain the pinch rolls substantially normal to the laminates which are therefore balanced within the pinch rolls as the laminates are passed through the machine to thereby prevent breakage of glass templates of the laminates.  An operator of the machine can rapidly select one of a number of stored programs to control the carriage for the production of corresponding laminates or can define a new program as necessary for new laminate designs or to customize operation in accordance with the skill and experience of the operator.
Patent CA-1329434-C (CA)
Title: Method and apparatus for video presentation from a variety of scanner imaging sources
Inventor: HARDY TYRONE L
IPC: G06T17/00
Filed: 1989-09-19
Granted: 1994-05-10
Abstract: METHOD AND APPARATUS FOR VIDEO PRESENTATION FROM        A VARIETY OF SCANNER IMAGING SOURCES                        ABSTRACT OF THE DISCLOSURE  The disclosure is directed to a method and apparatus for presenting a plurality of scanning images in a video presentation.  The disclosure is particularly directed to the use of such an apparatus and method in stereotactic surgery, wherein acquisition of a plurality of scanner images, conversion of these images into a selected standard format, storage of the acquired and converted images, selective recall and display of at least two of the images, and independent manipulation of each of the images for comparison are provided.  Probe placement can be simulated and the images can be enhanced in various ways.  The images used can be, for example, CT, PET, X-ray, DSA, isotope, and NMR scans.          Brain map atlas images can be superimposed on and fitted to the scan images of a particular brain.  Video displays of three dimensional simulations can also be produced.
Patent CA-1322709-C (CA)
Title: High solids aqueous silica slurry
Inventor: CRAWFORD ROGER A
IPC: C01B33/141
Filed: 1989-09-21
Granted: 1993-10-05
Abstract: ABSTRACT OF THE DISCLOSURE Described are high solids aqueous slurries of amorphous precipitated hydrated silica, which slurries are of relatively low viscosity.  The slurry typically contains from about 40 to about 60 weight percent of hydrated precipitated high structure silica.  The viscosity of the high solids slurry is less than about 1000 centipoises.  Processes for producing the aqueous high solids silica slurry are disclosed.  In one embodiment, a wet cake of amorphous precipitated hydrated silica is liquified and the liquified wet cake charged to a high intensity mill wherein the silica is wet milled until the median agglomerate particle size of the silica is between about 0.3 and about 3 microns.  In a further embodiment, finely-divided dry amorphous precipitated silica is slurried in a dispersion mill to the desired solids level and this slurry charged to a high-intensity mill and wet milled therein until the aforesaid agglomerate particle size range is attained.  The resulting high solids slurry can be shipped in bulk with only mild agitation to prevent settling .  A dispersant may also be added to the slurry prior to milling to retard settling of the silica.
Patent CA-1334301-C (CA)
Title: Apparatus and method for continuously measuring volumetric blood flow using multiple transducers and catheter for use therewith
Inventor: NASSI MENAHEM
IPC: A61B5/028
Filed: 1989-09-29
Granted: 1995-02-07
Abstract: Apparatus for measuring volumetric flow of a liquid in a vessel  having  a wall  and having  an  axis  extending longitudinally of the vessel parallel to the vessel wall. A flexible catheter is adapted to be disposed in the vessel.   First and second ultrasonic transducers are carried by the catheter on one side of the catheter and face the wall of the vessel so that the beams from the transducers each cross substantially the longitudinal axis  of the vessel.   The  first transducer beam  is inclined at an angle with respect to the longitudinal axis of the vessel.   The second transducer beam is inclined in a direction which is generally perpendicular to the longitudinal axis of the vessel.
Patent CA-1333130-C (CA)
Inventor: LECOMPTE GEORGE W
IPC: B65H55/04
Filed: 1993-05-26
Granted: 1994-11-22
Abstract: Method and apparatus for making a filament winding amenable to inside payout and having squared-off ends providing optimal volumetric efficiency.  The filament crossovers are distributed so as to reduce crossover stacking in one or a few places which can interfere with winding and payout from the finished winding.  A base wire layer (48) is wrapped onto a mandrel (30) over which a guide (52) is nestingly wound with adjacent guide wire turns spaced apart.  The filament first layer is wound nesting in the guide wire, spaces (54), and subsequent filament layers (56) accordingly formed.  Each crossing filament turn has an advance in a crossing region substantially aligned with a crossover region in the underlying layer and which in one embodiment is one-half the winding pitch.