baber/WOPTO huggingface dataset:
Patent CA-1336286-C (CA)
Inventor: LUBOWITZ HYMAN R
IPC: C08L79/08
Filed: 1988-01-05
Granted: 1995-07-11
Abstract: Polyimide oligomers include (1) linear, monofunctional crosslinking oligomers prepared by condensing a monoanhydride end cap with a diamine that includes alternating ether and "sulfone" (-SO2-, -S-, -CO-, -(CF3)2C-, or -(CH3)2C-) linkages connecting  alternating  aromatic  radicals  and  with  a dianhydride  (or  dianhydride  mixture),  particularly  the unsaturated, aliphatic dianhydride commonly known as MCTC; (2) linear, mono- or difunctional crosslinking oligomers prepared by  condensing  an  amine  end  cap  with  a  diamine  and  a dianhydride; and (3) multidimensional, crosslinking oligomers having an aromatic hub and at least three radiating arms connected to the hub, each arm including a crosslinking end cap at its distal end and at least one imide linkage.  Blends, prepregs, and composites can be prepared from the oligomers. Multidimensional oligomers   can   be   prepared   using etheranhydride  intermediates  or  etheramine  intermediates formed by reacting a suitable hub with nitrophthalic anhydride or aminophenol.
Patent CA-1338141-C (CA)
Title: Process for production of avermectins and cultures therefor
Inventor: HAFNER EDMUND WILLIAM
IPC: A23K20/195
Filed: 1988-01-21
Granted: 1996-03-12
Abstract: Novel mutant strains of Streptomyces avermitilis are produced by mutation of avermectin-producing S. avermitilis strains.          The novel strains lack branched-chain amino acid transaminase activity and/or branched-chain 2-oxo acid dehydrogenase activity or they lack branched-chain 2-oxo acid dehydrogenase activity and avermectin B O-methyltransferase activity.  These novel strains are useful for the production of both natural and non-natural avermectins which can be used as parasiticides.  The avermectins have the formula:     (I)   (wherein the broken line at the 22-23 position represents an optional double bond;   R1 is H or OH when the double bond is absent, or is H when the double bond is present.              R is isopropyl or (S)-sec-butyl when the avermectins are natural and is other than isopropyl or (S)-sec-butyl when the avermectins are non-natural, such as alkyl, alkenyl, alkynyl, alkoxyalkyl, alkylthioalkyl, cycloalkyl, cycloalkylalkyl, cycloalkylalkenyl or heterocyclic ring R2 is a disaccharide moiety of the formula:                     [wherein each of R4 and R5 is hydrogen or methyl]; and R3 is hydrogen or methyl).
Patent CA-1293377-C (CA)
Title: Apparatus for supporting tracks made of element pieces for toy vehicles
Inventor: HESSE KURT
IPC: A63H18/02
Filed: 1988-02-02
Granted: 1991-12-24
Abstract: ABSTRACT OF THE DISCLOSURE:           An apparatus  for supporting  tracks,  made of element pieces, for toy vehicles, which element pieces each have a travelable middle section laterally bounded by conductor bodies, with a baseplate having a attachment fitting and stand column sections which can be pusched onto the attachment fittings, and which are open at one end and closed at the other end having a circumferential rebate. Further stand column sections can be removably attached by their open ends onto the closed ends of the stand column sections and carrier arms can be suspended in appertures of the stand column sections.  To increase the stability and to improve attachment a stand column section is provided with an open attachable cylinder extending transversely of the long axis and diametrically of this is provided with a closed cylinder section having a step.   The attachable cylinder and/or the cylinder section are provided as holding members for transversely attachable stand column sections.
Patent CA-1324783-C (CA)
Inventor: CAWLFIELD DAVID W
IPC: C25B/
Filed: 1988-03-10
Granted: 1993-11-30
Abstract: ABSTRACT OF THE INVENTION         An improved multiple layered porous electrode for use in an electrochemical membrane cell is provided having a first perforated support layer, a second layer of fibers, a third layer of fibers less dense than the second layer and a fourth layer of meshed wire cloth. The electrode may be used as a cathode in the cell for the  electrochemical production  of  an  alkali  metal hydrosulfite  by  the  reduction  of  an  alkali  metal bisulfite component of a circulated aqueous catholyte solution.  Additionally, a flow barrier is provided for interrupting the catholyte flowing between the top and bottom of the cell to cause  substantially all the catholyte to change  flow direction  and pass  twice through the cathode plate.
Patent CA-1339712-C (CA)
Title: Superconductive material
Inventor: OHKURA KENGO
IPC: C01G1/00
Filed: 1988-03-29
Granted: 1998-03-17
Abstract: A superconductive material is in composition expressed as (Y0.33Ba0.67)aCub(OF)c.  The usual a, b and c are so selected as to satisfy a relation expression ax (mix valence of A) + bx (mix valence of B) = cx (mix valence of C).
Patent CA-1293067-C (CA)
Title: System for water treatment with ozone
Inventor: BACHHOFER BRUNO
IPC: C02F1/78
Filed: 1988-03-31
Granted: 1991-12-10
Abstract: Abstract:         A water treatment system having an apparatus (2) for the intensive pretreatment of the untreated water with ozone, having a downstream filter (3) with reducing action, and also having an apparatus (4) for the post-disinfection is improved in that the excess ozone which accumulates in the upper part (17) of the filter tank and which is added to the water during the pretreatment is re-moved anhydrously and fed into the apparatus for the post-treatment of the filtered water.  The post-treatment takes place preferably in a retention vessel (4) filled with packing material (15) in which the water comes into con-tact with ozone by surface contact.  The water level (24) is kept constant by regulating the gas discharge from the retention vessel (4).  (Illustrated by drawing).
Patent CA-1325265-C (CA)
Title: Dimmer for table lamps
Inventor: MANSOUR GEORGE A
IPC: F21S6/00
Filed: 1988-04-13
Granted: 1993-12-14
Abstract: ABSTRACT OF THE INVENTION        A dimmer for use as a support for a lamp and having a housing body, a chamber within the housing body, a dimmer switch within the housing body and a switch operating member extending outwardly through an opening in the body, the body supporting the lamp, and an opening in the body for receiving a cord from the lamp, and a receptacle connected to the dimmer switch for receiving a plug on the cord.
Patent CA-1321940-C (CA)
Title: Apparatus for distributing sample liquid
Inventor: ITOH TERUAKI
IPC: F16H21/44
Filed: 1988-04-25
Granted: 1993-09-07
Abstract: Abstract of the Disclosure An apparatus for distributing sample liquids from source test tubes into destination test tubes.  It has distribution tips and air-supply devices for supplying air to the tips at a low rate.  The tips are lowered into the source tubes, while air is flowing from the devices and through the tips.  The moment the tips reach the surface levels of the liquids contained in the source tubes, the air pressure changes.  When this change is detected, the tips start sucking the liquids from the source tubes.  An apparatus similar to the above-mentioned one.  It has distribution units each having a tip, a lever having a slit, and pins projecting from the units and inserted in the slit.  The lever is rotated, changing the interval between the distribution units to the interval between the source or the destina-tion tubes held in a rack.  A similar apparatus which has distribution tips and a tray.  The tray is kept away from below the tips while the sample liquids are being sucked into the tips from the source tubes or being distributed from the tips into the destination tubes, and is placed below the tips while the tips are being moved.  A similar apparatus which has distribution units each having a tip, and a jig having cut-outs.  The jig holds tips in the cut-outs as the distribution units are moved upward from the jig, whereby the tips are detached from the units.
Patent CA-1319783-C (CA)
Title: Butene-1 copolymer
Inventor: YAMAWAKI TAKASHI
IPC: C08F4/64
Filed: 1988-08-03
Granted: 1993-06-29
Abstract: ABSTRACT    The  invention  is  concerned  with  a  butene-1 copolymer  containing  ethylene  units  and butene-1 units within a molar ratio from 1 : 99 to 15 : 85 in which the intrinsic viscosity for the copolymer is within a range from 0.9 to 7.0 dl/g, the ratio of weight  average molecular weight/number average molecular weight is within a range from 4 to 15, the temperature difference between the highest value and the lowest value of the melting point of the copolymer measured by differential thermal scanning analysis is 2°C or higher, the ethylene block pro-perty of the copolymer measured by NMR spectroscopy is not more than 0.015, and the content of the boil-ing  diethyl ether  soluble  ingredient  in  the  co-polymer is within a range from 3 to 25% by weight.          The butene-1 copolymer of the invention has excel-lent workability and mechanical properties.
Patent CA-1311552-C (CA)
Title: Digitization of video signals
Inventor: GRAVES ALAN F
IPC: H04N7/24
Filed: 1988-08-04
Granted: 1992-12-15
Abstract: DIGITIZATION OF VIDEO SIGNALS          Abstract of the Disclosure A band limited composite video television signal has summed with it, at a reduced amplitude, a frequency modulated audio carrier signal at a higher frequency.  The sum signal is sampled and digitized at a sampling frequency which is at least twice the audio carrier frequency and is more than three times the frequency of a color subcarrier in the composite video signal, and is not related thereto. The sampling frequency is derived from a transmission network, whereby stuffing of the digitized signal for transmission is eliminated, and multiplexing of several digitized signals is facilitated.  At a decoder, the digital signal is converted back into an analog signal and the audio carrier signal amplitude boosted using filtering. Picture quality of a reproduced television signal is enhanced in that quantizing noise in the video signal becomes uncorrelated from line to line and frame to frame, due to dithering effects by the audio carrier signal.                             - i -
Patent CA-1322490-C (CA)
Inventor: VALENTINE WILBUR
IPC: F04B17/00
Filed: 1988-08-08
Granted: 1993-09-28
Abstract: RESILIENT SHAFT MOUNTING FOR PUMP        Abstract A resilient shaft mounting for a pump includes one or more sets of leaf plates bearing inwardly from an inner surface of a tube and pressing a resilient bushing on a rotatable shaft.  Three plates can each be disposed by their ends to press inwardly against a bushing formed by a water lubricated rubber tube operating as a anti-frictional contact element.  The plates are larger than the internal diameter of the tube, and are welded together at their ends.  Upon placing the plates in the tube, the plates deform inwardly against the tube to accomplish a tight yet resilient mounting.
Patent CA-1295585-C (CA)
Inventor: BURCHERT PETER P
IPC: B01F5/04
Filed: 1988-08-25
Granted: 1992-02-11
Abstract: ABSTRACT OF THE DISCLOSURE    Improved apparatus for fighting wild fires is provided herein.          Such apparatus  includes a water supply tank,  and a pump for delivering water under pressure from the water supply tank.   A fire-fighting liquid concentrate supply tank is provided along with means for mixing the concentrate with the water.  Nozzle means are provided for applying the mixture to vegetation.  Conduit means connect the water supply tank, the concentrate supply tank, the pump and the nozzle.  The improved system includes inductor/mixing means in the conduit downstream of the pump.  Such inductor/mixing means includes a hollow barrel portion,  a short pipe orifice positioned in the barrel, the short pipe orifice having a length and a constant inner diameter, the length thereof being at least 2.5  times  the  inner  diameter  thereof,  and means  defining  a concentrate liquid port in the barrel for inducting the liquid at the vena contracta of pumped water flowing therethrough.
Patent CA-1277303-C (CA)
Title: Tap controller for liquid delivery line
Inventor: BIERMANN PAUL
IPC: F16K31/363
Filed: 1988-09-06
Granted: 1990-12-04
Abstract: ABSTRACT OF THE DISCLOSURE           There is provided a new and useful liquid flow controller head comprising a housing, a first chamber within the housing, a piston having first and second sides and mounted in the chamber in sealed sliding engagement therewith, the piston adapted to engage and operate a push/pull activation lever of a liquid dispensing tap, and fluid passages through the housing into the chamber on opposite sides of the piston, and wherein the size of the fluid passages is chosen such that, when either passage is charged with compressed air at a predetermined pressure, the piston will slide responsive to the pressure at a predetermined speed.
Patent CA-1293831-C (CA)
Title: Apparatus for converting distinctive ring to selective ring in telephone lines
Inventor: MATTLEY DANNY G
IPC: H04M19/02
Filed: 1988-09-08
Granted: 1991-12-31
Abstract: Abstract of the Disclosure An  apparatus  for  converting  a  distinctive  ring  to  a selective  ring  includes  a  rectifier  connected between a main telephone  line  and ancillary telephone lines to prevent AC ring current  from  passing  to  the  ancillary  lines.    A  relay is connected  to  each  ancillary  line with contacts connecting the ancillary  line  to  the  rectifier.    Each relay has additional contacts   to   which   the  ancillary  telephone  lines  may  be selectively  connected,  the  additional contacts being connected to  the  main  telephone  line,  bypassing the rectifier.  When a selected  relay is energized, ring current bypasses the rectifier and  will  ring  the telephone on that ancillary line.  A cadence detecting  circuit  includes a "quiet" interval measuring circuit and  an "active" interval measuring circuit, to measure the first "ring"  and  the first "quiet" interval between rings.  The quiet interval  circuit will  energize one relay if the quiet interval is less  than  a  predetermined  length.    The  active interval circuit  will  energize  a different relay if the active interval is of a minimum length of time.
Patent CA-1326556-C (CA)
Title: Single molecule tracking
Inventor: SHERA EDGAR B
IPC: G01N15/02
Filed: 1988-09-28
Granted: 1994-01-25
Abstract: SINGLE MOLECULE TRACKING                 ABSTRACT OF THE DISCLOSURE A detection system is provided for identifying individual particles or molecules having characteristic emission in a flow train of the particles in a flow cell. A position sensitive sensor is located adjacent the flow cell in a position effective to detect the emissions from the particles within the flow cell and to assign spatial and temporal coordinates for the detected emissions.  A computer is then enabled to predict spatial and temporal coordinates for the particle in the flow train as a function of a first detected emission.  Comparison hardware or software then compares subsequent detected spatial and temporal coordinates with the predicted spatial and temporal coordinates to determine whether subsequently detected emissions originate from a particle in the train of particles.  In one embodiment, the particles include fluorescent dyes which are excited to fluoresce a spectrum characteristic of the particular particle.  Photons are emitted adjacent at least one michrochannel plate sensor to enable spatial and temporal coordinates to be assigned.  The effect of comparing detected coordinates with predicted coordinates is to define a moving sample volume which effectively precludes the effects of background emissions.
Patent CA-1328434-C (CA)
Title: Compressor valve system
Inventor: GATECLIFF GEORGE W
IPC: F04B39/00
Filed: 1988-10-14
Granted: 1994-04-12
Abstract: ABSTRACT    A scotch yoke compressor assembly is disclosed wherein four radially disposed pistons reciprocate in cylinders defined in a crankcase.  In a central portion of the crankcase, a scotch yoke mechanism operably couples the pistons to an eccentric portion on a rotating crankshaft.          Each piston includes suction ports extending therethrough and a suction valve on the piston head.  The suction valve is operably retained on a piston head and the piston is attached to a yoke member by a single bolt.  The bolt head is received within a recess coined in a valve plate interposed between the crankcase and a cylinder head cover.          Circularly arranged discharge ports in the valve plate are opened and closed by an annular discharge valve guidedly retained against the valve plate at diametrically opposed locations, by a combination of guide pins and an annular retainer member.  The retainer member rides on the guide pins and is biased against the cylinder head cover and the discharge valve to permit extended lift during high mass flow rates and slugging.
Patent CA-1303881-C (CA)
Title: Muscular expansion bumper and head-gear appliance
Inventor: BERGERSEN EARL O
IPC: A61C7/20
Filed: 1988-10-18
Granted: 1992-06-23
Abstract: ABSTRACT OF THE DISCLOSURE       A muscular expansion bumper appliance is optionally removable from a patient's mouth and includes a wire form member formed in a U-shape with the free ends which may be removably secured to buccal tubes.  The wire form member supports at least one side pad which overlies one or both of the upper or lower posterior teeth to hold the user's cheeks away from those teeth to permit lateral posterior expansion.  The side pads can be trimmed to custom fit the appliance to the user and the appliance comes in varying sizes.
Patent CA-1321369-C (CA)
Title: Bill handling apparatus
Inventor: SATO KOICHI
IPC: G07D9/00
Filed: 1988-10-20
Granted: 1993-08-17
Abstract: BILL HANDLING APPARATUS                     ABSTRACT      A circulation type bill deposit and dispensing apparatus includes a feeder mechanism for receiving bills and feeding them sequentially to a discriminator station where the validity of each bill is checked.          Storage is supplied for separate bill demoninations downstream of the discriminator.
Patent CA-1323574-C (CA)
Inventor: GUINDON YVAN
IPC: A61K31/22
Filed: 1988-10-27
Granted: 1993-10-26
Abstract: Treating Herpes Viral Infections Abstract of the Disclosure A  group  of  known  naphthalene  derivatives  have been found to be useful  for preventing or relieving herpes viral infections.
Patent CA-1290320-C (CA)
Inventor: RAISANEN NIILO A A
IPC: F24F12/00
Filed: 1988-11-14
Granted: 1991-10-08
Abstract: ABSTRACT OF THE INVENTION     The present invention comprises an air to air heat exchanger having a circular outer housing and a circular exhaust duct lying there within along the longitudinal central access thereof.  A plurality of cone shaped turbulators are secured to a rod supported within and extending along the longitudinal central axis of the exhaust.  The outer housing is made of a heat insulating plastic, and the exhaust duct, turbulators and central rod are made of corrosion resistant metals such as aluminum or stainless steel.
Patent CA-1320721-C (CA)
Title: Process for preparing lactulose from lactose by epimerization with sodium aluminate
Inventor: CAROBBI RENATO
IPC: C13K13/00
Filed: 1988-11-30
Granted: 1993-07-27
Abstract: ABSTRACT            A process for preparing lactulose from lactose in which an aqueous lactose mixture is reacted with a sodium aluminate solution and the solution obtained is continuously neutralized by feeding this solution and a sulphuric acid solution to a reactor simultaneously in such a manner as to obtain a pH of between 4.5 and 8.            By operating in this manner an aluminium hydroxide suspension is obtained which can be easily separated from the lactulose solution.
Patent CA-1339803-C (CA)
Title: Dideoxydidehydrocarbocyclic nucleosides
Inventor: VINCE ROBERT
IPC: C07D487/04
Filed: 1989-01-19
Granted: 1998-04-07
Abstract: Compounds of formula (I) (see fig. I) (wherein X is hydrogen, NRR1, SR, OR or halogen; R and R1 may be the same or different and are selected from hydrogen, C1-4alkyl and aryl) and pharmaceutically acceptable derivatives thereof are described having anticancer activity.
Patent CA-1305701-C (CA)
Title: Process for acrylamidoacylation of alcohols
Inventor: MOREN DEAN M
IPC: C08F20/52
Filed: 1989-03-07
Granted: 1992-07-28
Abstract: ABSTRACT OF THE DISCLOSURE      The present invention provides a dramatically improved process for the preparation of acrylamide and methacrylamide functional monomers, oligomers, and polymers that avoids the use of acidic catalysts which can cause undesired side reactions.  The present invention process involves reacting an alkenyl azlactone with a hydroxy functional compound in the presence of a catalytic amount of either a bicyclic amidine or a trivalent phosphorus compound.  These efficient basic catalysts provide unexpectedly increased reaction rates under mild conditions.
Patent CA-1321927-C (CA)
Title: Bearing arrangement for marine propulsion device reversing transmission
Inventor: MCNEILL STEVEN R
IPC: B63H23/08
Filed: 1989-03-30
Granted: 1993-09-07
Abstract: ABSTRACT OF THE DISCLOSURE               A marine propulsion device comprising a gearcase, a propeller shaft supported by the gearcase for rotation about an axis and adapted to support a propeller, a gear including a hub coaxial with the propeller shaft, first and second axially adjacent bearings located between the hub and the gearcase and supporting the hub for rotation about the axis, and a clutch for drivingly connecting the bevel gear to the propeller shaft.
Patent CA-1333384-C (CA)
Inventor: FLORIN CHRISTIAN
IPC: F04D29/70
Filed: 1989-04-12
Granted: 1994-12-06
Abstract: In a radial fan suitable in particular for traction vehicles, 10 - 15% of the conveyed air quantity is diverted radially from the cooling-air path by guide devices (10) which at the same time serve as a separator; the main proportion passes to the coolers after a 90° deflection. In this way, dirt particles such as dust, snow, spray water, etc, are effectively kept away from the coolers.
Patent CA-1335035-C (CA)
Inventor: LEMIEUX PAUL R
IPC: C04B33/04
Filed: 1989-08-01
Granted: 1995-04-04
Abstract: A lightweight oil and gas well proppant made by simultaneously mixing and compacting a milled calcined kaolin clay powder to form green pellets and then drying, screening and sintering the pellets to form proppant pellets having a specific gravity of 3.0 or less and a conductivity of at least 4,200 millidarci-feet and preferably at least 5,100 md-ft as measured by the  Stim-Lab method after 50 hours at 8,000 psi and 275°F in the prescence of deoxygenated aqueous 2% solution of KCl.
Patent CA-1301263-C (CA)
Title: Power saving low frequency power amplifier
Inventor: ISHIGURO KAZUHISA
IPC: H04B1/40
Filed: 1989-08-14
Granted: 1992-05-19
Abstract: ABSTRACT OF THE DISCLOSURE     A  power  saving  low  frequency  power  amplifier includes a first stage amplifier for receiving and amplify-ing data signal, a second stage amplifier for amplifying the output of the first stage amplifier, and a power amplifier for amplifying the output of the second amplifier.   the first stage amplifier is operated in response to a driving current.  The second stage amplifier receives a first idling current for obtaining a predetermined amplification, and the power amplifier receives a second idling current for obtain-ing  a  predetermined  amplification.   A  first  switching circuit is provided for making and braking paths for the first and second idling currents provided for producing a power save signal to the first switching means for braking the first switching circuit when the power save signal is present.