baber/WOPTO huggingface dataset:
Patent CA-1164254-A (CA)
Title: Dental file
Inventor: MCSPADDEN JOHN T
IPC: A61C1/00
Filed: 1981-08-12
Granted: 1984-03-27
Abstract: A dental file is disclosed which is useful in endodontia for removing dead or damaged tissue from a curved tooth root canal while minimizing the tendency to form ledges and slits. The file has a flexible tapered shank which has a cutting surface on its periphery and a pilot projecting from the tapered end of the file for guiding the shank along the curved root canal preventing the cutting surface near the end of the shank from gouging into the wall of the curved root canal or penetrating too far through the apical foramen of the root canal. A set of dental files is also disclosed in which the files in the set increase in diameter from one file to the next larger file in the set. In such a set the diameter of the pilot on each file is substantially the same for all files in the set.
Patent CA-1169419-A (CA)
Inventor: NAITO KENZO
IPC: A61K31/545
Filed: 1981-11-05
Granted: 1984-06-19
Abstract: Abstract of the disclosure An improvement, in per se known method for producing 7-aminocephem compound being important intermediate for producing antimicrobial substances, represented by the formula:                         [II]   wherein R1 is a hydrogen atom or a methoxy group and R2 is a residue of a thiol compound, or a salt or ester thereof, by reacting a compound of the formula:                         [I]   wherein R1 is as defined above and R is a carboxylic acid acyl group, or a salt or ester thereof,with a thiol compound or a salt thereof, is characterized in that the reaction is conducted in an organic solvent in the presence of a dihalo-phosphoric acid to give the compound [II] in high yield and high purity.
Patent CA-1172529-A (CA)
Inventor: CARSON WILLIAM R
IPC: F28D7/16
Filed: 1981-12-02
Granted: 1984-08-14
Abstract: ORIFICING OF STEAM SEPARATORS FOR UNIFORM FLOW DISTRIBUTION IN RISER AREA OF STEAM GENERATORS          Abstract of the Invention A vertical shell-and-tube steam generator (10) which has a plurality of U-shaped tubes (60,62) through which the heating fluid flows, vaporizing fluid flowing on the outside of the tubes. A plurality of separators (26) are located above the tubes to remove liquid from the generated vapor.  Orifices are located in some of the separator inlets (22) located above the hot leg region (60) of the U-tubes reducing the problem of overloading of these separators (26) by accomplishing a more uniform flow distribution of vapor from the areas above both the hot (60) and cold (62) legs of the U-tubes.
Patent CA-1173819-A (CA)
Inventor: YANG TAI-CHENG
IPC: C07D307/60
Filed: 1981-12-30
Granted: 1984-09-04
Abstract: ABSTRACT OF THE DISCLOSURE           A vanadium, phosphorus oxygen containing catalyst composition capable of partially oxidizing hydrocarbons (e.g., n-butane) to form a carboxylic anhydride (e.g., ma-leic anhydride), a process for preparing this catalyst, and a process for using this catalyst to form such anhy-drides is disclosed.  The catalyst composition is prepared by an organic heterogeneous technique followed by a water treatment step and activation.
Patent CA-1188839-A (CA)
Inventor: LINDNER CHRISTIAN
IPC: C08F2/18
Filed: 1982-01-11
Granted: 1985-06-11
Abstract: RUBBER POWDERS     Abstract of the Disclosure Free-flowing rubber powders of particles having an average diameter of from 0.01 to 10 mm which contain a grafted-on shell of the polymer or copolymer of one or more vinyl monomers in a quantity of from 2 to 20 % by weight, based on the rubber, which rubber is a latex polymer of which the latex particles consist essentially of from 99 to 80 % by weight of acrylate rubber having glass transition temperatures below 0°C and from 1 to 20 % by weight of polymer having glass transition temperatures above 0°C grafted thereon, and a process for their produc-tion, wherein the latex of the rubber is completely broken to form an aqueous suspension of the rubber, after which from 2 to 20 % by weight, based on the rubber, of one or more vinyl monomers which form polymers having glass transi-tion temperatures above 25°C are introduced into the sus-pension and the monomer(s) is/are polymerized, optionally after the addition of a radical-forming catalyst.
Patent CA-1174344-A (CA)
Inventor: LEVINSON LIONEL M
IPC: G09G3/36
Filed: 1982-01-21
Granted: 1984-09-11
Abstract: LIQUID CRYSTAL DISPLAY WITH LOW CAPACITANCE VARISTOR               Abstract of the Disclosure A highly multiplexed liquid crystal display employs nonlinear varistor elements exhibiting a particularly low capacitance value to effectively drive individual liquid crystal cells.  Low varistor capacitance is achieved through controlled addition of Sb2O3 during varistor manufacture.
Patent CA-1180047-A (CA)
Inventor: ISHLER WILLIAM E
IPC: H01J61/02
Filed: 1982-01-28
Granted: 1984-12-27
Abstract: ATTACHMENT OF BASE TO LAMP UNIT                 ABSTRACT OF THE DISCLOSURE    A lamp unit having a housing containing a ballast and provided with a screw base.  The base fits over an end of the housing and is attached thereto by a low-cost resin material which, in cooperation with shaped contours on the housing and the base, mechanically locks these parts together.
Patent CA-1175060-A (CA)
Inventor: KLEINER HANS-JERG
IPC: C07B61/00
Filed: 1982-03-19
Granted: 1984-09-25
Abstract: ABSTRACT OF THE DISCLOSURE           Process for the preparation of vinylphosphonic acid dichloride and 2-chloroethanephosphonic acid dichloride, by heating a 2-acetoxyethanephosphonic acid dialkyl ester of the general formula   wherein the R groups are the same or different and are selected from alkyl groups having 1 to 4 carbon atoms, in the presence of acid or basic catalysts at 150 - 270°C with elimination of an alkyl acetate, reacting the resulting reaction mixture with water at temperatures between 130 - 230°C while simultaneously distilling off the alcohol formed, and reacting the crude vinylphosphonic acid thus formed with phosgene in the presence of catalysts and also in the presence of phosphonic acid dichlorides.
Patent CA-1204883-A (CA)
Title: Semiconductor device and manufacturing process  thereof
Inventor: MATSUO SEITARO
IPC: H01L21/762
Filed: 1982-04-20
Granted: 1986-05-20
Abstract: ABSTRACT OF THE DISCLOSURE         A semiconductor device in which an insulator or conduc-tor film is closely deposited in a groove formed in a semicon-ductor substrate or an insulating or conductor layer thereon to planarize the surface thereof.  A semiconductor device manufac-turing process in which a specimen is selectively etched away through using a resist pattern as a mask, a pattern forming film is deposited by a plasma deposition technique on the specimen, and the resist film is removed, whereby the pattern forming film fills up a groove formed by etching to provide a planarized surface.  As the invention permits the deposition in a groove of a flat topped region which can be made coplanar with the upper surface of the substrate or layer carried on the substrate the overall height of the device can be kept small thereby increasing the packing density.
Patent CA-1177121-A (CA)
Inventor: GRINDHEIM EARL A
IPC: G01L9/12
Filed: 1982-05-31
Granted: 1984-10-30
Abstract: ABSTRACT OF THE DISCLOSURE           A circuit for measuring a parameter to be sensed by means of at least one variable impedance sensor responsive to such parameter.  The circuit includes a frequency determin-ing means coupled to the variable sensor for providing an oscillatory frequency signal responsive to the impedance of the sensor, a signal amplifier coupled to the frequency determining means for amplifying the frequency signal to provide an output signal representative of the frequency signal and to sustain circuit oscillation, a signal detector coupled to the output signal to provide a control signal representative of such output signal, and a control coupled to receive the control signal and coupled to the frequency determining means thus allowing the oscillatory frequency signal of the circuit to oscillate at a frequency representa-tive of the measured parameter.
Patent CA-1195668-A (CA)
Inventor: ELLWOOD HENRY
IPC: B29C31/02
Filed: 1982-07-15
Granted: 1985-10-22
Abstract: ABSTRACT      Mixtures of particulate material of widely different particulate sizes segregate on storage, smaller particles falling to the bottom.  In the invention mixture is supplied to a bunker in a plurality of layers and subsequently withdrawn so that mixture is taken from each layer simultaneously.  Apparatus used comprises a rotor dividing the bunker into several equal compartments.  During introduction of a batch of mixture to the bunker the rotor is rotated through several revolutions so that the mixture forms layers in each compartment.  The bottom of the bunker is flat.  An outlet slot in the bottom extends along a chord.  A screw conveyor below the slot carries mixture falling through the slot away from the bunker.  The rotor rotates slowly during dispensing in synchronism with the conveyor, pushing mixture to the slot at such a rate that material from every layer in a compartment falls into the slot simultaneously, the compartments being progressively emptied.
Patent CA-1185268-A (CA)
Title: Condensation of natural gas or methane into gasoline range hydrocarbons
Inventor: OLAH GEORGE A
IPC: C07C11/02
Filed: 1982-08-30
Granted: 1985-04-09
Abstract: Abstract This invention relates to a new process for the direct conversion of natural gas or methane into gasoline range hydrocarbons (i.e., synthetic transportation fuels or lower olefins) via catalytic condensation using superacid catalysts.
Patent CA-1184600-A (CA)
Inventor: SMITH JAMES F
IPC: H03K5/02
Filed: 1982-10-22
Granted: 1985-03-26
Abstract: ABSTRACT OF THE DISCLOSURE           A circuit for driving an electrical load such as an electric motor, by a pulse width modulated current includes a saturable current driver connected to the load.  The circuit includes a linear transconductance amplifier with current-sensing feedback for applying a pulse-width modulated control current to the driver.  The  feedback preserves the extent of saturation and of cut-off by providing current pulses which are invariant with respect to thermally induced changes in circuit parameters.  Amplitude and offset control circuitry are also provided for setting the range of current values during the current pulsing to optimize the operation of the driver.          In an alternative simplified circuit, a low-level switching circuit drives complementary output transistors operating in a linear fashion, and producing current pulses which are invariant with respect to the saturable driver parameters.
Patent CA-1199652-A (CA)
Title: Arrangement for damping the transmission of  vibrations
Inventor: HAEGGMAN HARDY
IPC: F16F1/46
Filed: 1982-10-29
Granted: 1986-01-21
Abstract: ABSTRACT          The invention relates to an arrangement for damping the transmission of vibrations between a vibration-producing first object, for example a vibrating machine, working equipment or tool, and a second object, for example a handle which is to be gripped by an operator, a frame, foundation or the like. The arrangement includes a resilient element (4,7,11) of polymer material. In accordance with the invention the said element is restrained under a certain prestress between the said first (2,3,6) and second (1) object. Furthermore the prestress-ing force is preferably so chosen that the extension caused by the prestressing force is greater than the amplitude of the vibrational oscillations.
Patent CA-1203764-A (CA)
Inventor: SHIMIZU KIMIHIRO
IPC: A61P7/02
Filed: 1982-10-29
Granted: 1986-04-29
Abstract: ABSTRACT OF THE DISCLOSURE      A derivative of a human-originated non-immunogenic plasminogen activator is disclosed which comprises at least one polyalkylene glycol attached with at least one coupling agent to amino acid side chains of said plasmino-gen activator, said polyalkylene glycol having a molecular weight of 200 - 20,000 and optionally containing one or more alkyl and/or alkanoyl groups as substituents.  Also disclosed are a process for producing such derivative and a thrombolytic agent containing such derivative.
Patent CA-1208411-A (CA)
Inventor: HUDSON PAUL
IPC: C02F1/50
Filed: 1982-11-04
Granted: 1986-07-29
Abstract: ABSTRACT OF THE DISCLOSURE           A device for controlling the growth of algae in water comprises a conduit having an inlet and an outlet and several zinc plates mounted in a centre section of this conduit.  The plates are arranged and constructed so that water flowing through the conduit comes into intimate contact with the plates.  The plates are made of substantially pure zinc and each has a number of holes therein to permit the flow of water therethrough. Preferably the conduit is constructed from PCV pipe sections.  The end sections of the conduit are made from pipe reducers and each tapers radially inwardly in an axial direction away from the centre section.
Patent CA-1210742-A (CA)
Inventor: SHAW DAVID N
IPC: F04C29/02
Filed: 1982-11-15
Granted: 1986-09-02
Abstract: SELF-CLEANING SINGLE LOOP MIST TYPE      LUBRICATION SYSTEM FOR SCREW COMPRESSORS     ABSTRACT OF THE DISCLOSURE    Intermeshed helical screw rotors are mounted for rotation by anti-friction bearings surrounding inte-gral shafts extending axially outward of the ends of the  intermeshed  screw  rotors  and within respective high pressure outlet and low pressure inlet bearing housings, sealed to the exterior.  Oil from a separa-tor/sump  at  or  near  compressor  discharge  pressure feeds via a closed passage to annular cavities sur-rounding  the  rotor  shafts  upstream  of  the  outlet housing  bearings.   Oil  seeps  through  very  narrow annular  gaps  functioning  as  self-cleaning upstream capillaries to the outlet bearing cavities with the pressure reduction causing oil mist lubrication of the confined bearings within the outlet bearing housing.          Further  passages  fluid  connect  the  outlet  bearing housing cavities to similar cavities within the inlet bearing housing where mist lubrication of the inlet bearings occurs.  Further,  oil passage means connect the inlet bearing housing cavities to an oil injection port via a downstream capillary with the oil injection port  opening  to  the  working  chamber  first  closed thread.   The  upstream  and  downstream  capillaries insure proper pressure reduction through the single loop lubrication system and the downstream capillary functions to maintain 2 pressure differential between the inlet bearing housing and the suction side of the intermeshed screws when the slide valve shifts to full unloaded position such that the oil injection port is open directly to the suction port of the compressor.
Patent CA-1186312-A (CA)
Inventor: SWARINGEN ROY A JR
IPC: C07D217/20
Filed: 1982-11-22
Granted: 1985-04-30
Abstract: ABSTRACT OF THE DISCLOSURE           Intermediate duration muscle relaxants of formula (I):             (I) wherein Y is C1-4 alkyl;  n is 3-7; and X? is an anion; their preparation, formulations thereof and their use in producing muscle relaxation in mammals including man.
Patent CA-1153147-A (CA)
Inventor: CORAN AUBERT Y
IPC: C08G81/02
Filed: 1982-12-03
Granted: 1983-08-30
Abstract: ABSTRACT OF THE DISCLOSURE This invention provides a block copolymer comprising at least one segment each of nitrile rubber and an olefin polymer, said copolymer being derived from an olefin polymer containing one or more graft forming functional groups selected from the group consisting of carboxy, halo, amino, or a functional group derived from methylol phenolic material.
Patent CA-1191393-A (CA)
Title: Presetting process
Inventor: EDELMANN GILBERT
IPC: B41F27/00
Filed: 1982-12-07
Granted: 1985-08-06
Abstract: A process for presetting a dry offset printing machine intended for printing cylindrical or conical workpieces, in which presetting templates are prepared from a matrix film which is also used for producing the working blocks and perform the function of permanently setting the machine so that the subsequent introduction of blocks merely requires simple checking.
Patent CA-1195190-A (CA)
Inventor: EPPERSON BONNIE J
IPC: B01D69/12
Filed: 1982-12-24
Granted: 1985-10-15
Abstract: "CONTINUOUS PRODUCTION OF POLYMETHYLPENTENE MEMBRANES"                        ABSTRACT           Gas separation membranes may be prepared in a continuous manner by passing a porous support which may, if so desired, be backed by a fabric through a solution of polymethylpentene dissolved in an organic solvent such as hexane.  The support member is passed through the solution while one side thereof is in contact with a roller, thereby permitting only one side of the support member to be coated with the polymer.  After continuously withdrawing the support member from the bath, the solvent is allowed to evaporate and the resulting membrane is recovered.
Patent CA-1198178-A (CA)
Inventor: WELLAND DAVID R
IPC: H03G7/08
Filed: 1983-01-18
Granted: 1985-12-17
Abstract: ABSTRACT OF THE DISCLOSURE A signal gain controlled system comprises an opera-tional amplifier including a feedback path between the input and output terminals of the amplifier.  The system includes first variable impedance means for varying the output voltage at the output terminal of the amplifier in response to and as a function of the input current signal applied to the input terminal and a first control signal.  A signal path coupled between the output terminal of the operational amplifier and the output terminal of the system includes second variable impedance means for varying the output current of the system in response to and as a function of (a) the output voltage at the output of the amplifier and (b) a second control signal.  The signal gain of the system is a function of the ratio of the second and first control signals.    The preferred amplifier is the type having an input resistance and a feedback resistance, wherein at least one of the resistances includes a transistor which is biased to operate in its saturated region. The gain of the amplifier is a function of the control signal applied to the base of the saturated transistor.    The signal gain controlled system can be utilized with a level sensing detector to provide signal compression or expansion.
Patent CA-1180478-A (CA)
Inventor: STAENDEKE HORST
IPC: C08G101/00
Filed: 1983-02-23
Granted: 1985-01-02
Abstract: POLYOL PRE-MIXTURE FOR MIXING FLAME-RETARDANT POLY-URETHANE FOAM PLASTICS     ABSTRACT OF THE DISCLOSURE      The disclosure relates to a storable polyol pre-mixture for making flame-retardant polyurethane foam plastics consisting of a mixture of a polyester polyol or polyether polyol and an ammonium polyphosphate as a flame-retardant agent. The pre-mixture contains more particularly an ammonium polyphosphate which corres-ponds to the general formula (I) H(n-m)+2(NH4)mPnOn3n+1              (I) in which n stands for an integral average value of 100 to 1000, m stands for a whole number of up to n+2 and m/n stands for a value of about 1, has an acid number of 0.01 to about 5 mg KOH/g, contains 0.01 to 0.5 mass% water and 0.5 to about 15 mass% water-soluble fractions in water at 25°C.
Patent CA-1203965-A (CA)
Inventor: BOWMAN HAROLD M
IPC: B22D7/06
Filed: 1983-02-28
Granted: 1986-05-06
Abstract: INGOT MOLD AND METHOD            Abstract of the Disclosure An ingot mold provided with means affording stress relief thereto for the ingot pouring operation, while maintaining the mold in condition to aid in pre-venting metal leakage therefrom during the ingot pouring operation and subsequent cooling of the ingot, and provid-ing mold wall support for the ingot until its skin has sufficient structural integrity to support the molten interior of the ingot, and a mold which can be recycled for use in a faster manner as compared to heretofore utilized solid or one-piece type ingot molds.  In certain embodiments, the mold is formed of a plurality of comp-letely separate and individual side wall sections def-ining at least the side periphery of a mold cavity, together with coupling means connecting the wall sections together.  The coupling means provide for expansion and contraction of the mold sections relative to one another during the pouring of molten metal into the mold, and the resultant heating and subsequent cooling thereof. At least certain of such coupling means comprises ad-justable spring means able to be preloaded a predeter-mined extent prior to the pouring operation, and thus providing for predetermined preloading of the openable and closeable junctures between the mold sections.  In other embodiments, the mold may be of a generally one-piece affair, but having said wall sections with junct-ures openable and closeable, together with the aforemention-ed coupling means, including preloadable spring means, for automatic compensation for expansion and contraction of the mold during the pouring and ingot producing cycles thereof in a manner to provide stress relief to the mold.        A novel method for production of metal ingot it also disclosed.
Patent CA-1199198-A (CA)
Inventor: ALVES RONALD V
IPC: G01K15/00
Filed: 1983-03-14
Granted: 1986-01-14
Abstract: MULTIPLEXING AND CALIBRATION TECHNIQUES      FOR OPTICAL SIGNAL MEASURING INSTRUMENTS              ABSTRACT OF THE DISCLOSURE         An optical temperature measuring instrument for detecting illuminescense of phosphor temperature sensing elements, wherein a two  or  more  point  temperature  calibration system  allows compensating for different temperature sensor characteristics, and a single optical system is utilized for simultaneously reading the temperatures of a plurality of temperature sensors in a multiplexing arrangement.
Patent CA-1203973-A (CA)
Inventor: CASSIN THOMAS R
IPC: C09K5/20
Filed: 1983-03-25
Granted: 1986-05-06
Abstract: Organosiloxane-Silicate Copolymer Antifreeze Composition With Nitrate Corrosion Inhibitor Abstract A corrosion-inhibited heat transfer composition concentrate comprising an alcohol, an organosiloxane/silicate copolymer, and a corrosion inhibiting amount of a nitrate salt.  Such coolant concentrate may suitably be diluted with from about 25% to about 90% by weight of water based upon the weight of the concentrate, to form an aqueous composition which has particular utility as a corrosion-inhibited heat transfer composition for heat exchange systems, for example, those employed with internal combustion engines.  Such compositions are highly effective in reducing corrosion in heat exchange systems containing components of aluminum contruction.
Patent CA-1196279-A (CA)
Inventor: CHARLET EGBERT
IPC: A01N37/18
Filed: 1983-03-28
Granted: 1985-11-05
Abstract: ABSTRACT OF THE DISCLOSURE     The invention relates to insect repellents containing N,N-diethyl-m-toluamide (DEET) as the repellant component and castor oil as the component which provides a prolongation of activity.
Patent CA-1214137-A (CA)
Title: Vibratory curvilinear and linear profiled screen  particularly adapted for dewatering
Inventor: KINDER GREEVER C
IPC: B01D35/20
Filed: 1983-04-22
Granted: 1986-11-18
Abstract: VIBRATING SCREENING APPARATUS               ABSTRACT OF THE DISCLOSURE           A novel vibratory screening apparatus particularly adapted for the wet-screening of slurry mixtures containing particles and liquids, and more particularly to the separation of solid particles and liquids utilizes in combination a combined vibratory screening deck having a sieve bend portion upstream of an inclined substantially planar portion to effect substantial dewatering of the slurry mixture as it flows across the screening deck.