baber/WOPTO huggingface dataset:
Patent CA-1328353-C (CA)
Title: Recovery of zinc from zinc bearing sulphidic ores and  concentrates by controlled oxidation roasting
Inventor: ROBINSON MURRY C
IPC: C22B19/02
Filed: 1986-03-17
Granted: 1994-04-12
Abstract: ROGERS, BERESKIN & PARR     TITLE:  RECOVERY OF ZINC FROM ZINC BEARING SULPHIDIC ORES        AND CONCENTRATES BY CONTROLLED OXIDATION ROASTING            INVENTORS:        MURRY C. ROBINSON                  DONALD W. KIRK                  DR. BRUCE JUE                ABSTRACT OF THE DISCLOSURE           A process is described for the controlled oxidation roasting of zinc bearing sulphidic ores and concentrates by adjusting  the  furnace  temperature and  residence  time together with the oxygen availability to the sulphide reten-tion requirements in the calcine. The obtained calcine is subsequently subjected to various physical and chemical pro-cess steps to separate the unreacted sulphides which are then dead roasted and treated for zinc recovery, according to one embodiment of the process. In another embodiment the separated, unreacted sulphides are returned to the control-led oxidation roasting step.        The  chemical  separation  process  steps  include sulphur dioxide leaching. In one embodiment zinc is prefer-entially dissolved as sulphite and the solution obtained is further  treated  for  zinc  recovery.  In  other  embodiments sulphuric acid, or ammonical ammonium carbonate or similar leaching reagents are used for the preferential dissolution of the zinc oxide present in the calcine.
Patent CA-1299947-C (CA)
Inventor: DEMPSEY DANIEL J
IPC: B21D53/02
Filed: 1986-03-26
Granted: 1992-05-05
Abstract: MULTIPLE CELL CONDENSING HEAT EXCHANGER AND METHOD                 ABSTRACT OF THE DISCLOSURE            A gas fired condensing furnace comprising a multiple cell condensing heat exchanger is provided wherein each condensing heat exchanger cell has a condensing flow passage of serpentine shape formed from a single flat sheet metal blank. The condensing heat exchanger cell is formed to be compact in size and to minimize heating fluid side pressure drop therethrough. The condensing flow passage for each condensing heat exchanger cell provides high velocity fluid flow therethrough for increasing its heat transfer characteristics.
Patent CA-1281253-C (CA)
Title: Powered respirators
Inventor: GREENOUGH GEORGE K
IPC: A62B18/04
Filed: 1986-11-14
Granted: 1991-03-12
Abstract: ABSTRACT POWERED RESPIRATORS A powered respirator of self-contained form for use in oxygen-sufficient atmoshperes comprises a visored helmet (10) defining in use a passageway (15) extending from a rear opening (16) across the user's head (13) and face, an electric fan (17) and filter (19) located adjacent the opening to pass respiration air through the passageway, a fan battery (18) housed forwardly of the helmet, and an exhaust valve (20) mounted in the passageway near the user's mouth, the valve operating to open in response to gas pressure similar to that of normal exhalation and including a spring closure mechanism having a decreasing spring rate during opening.   122?
Patent CA-1277861-C (CA)
Inventor: TAKEI TOSHITAKA
IPC: G03F7/30
Filed: 1986-11-27
Granted: 1990-12-18
Abstract: Abstract of the Disclosure A resist developing apparatus comprising a developing tank consisting of a top portion, a body portion, and a bottom portion, at least one of the top, body, and bottom portions being comprised of an inner wall and an outer wall, a heat exchange chamber being defined between the inner and outer walls for being supplied with a heating medium; a chuck disposed inside the developing tank for holding a work piece in position, a nozzle for spraying chemical liquid toward the work piece held in position by the chuck; a heating medium supply unit for supplying heating medium at a specified temperature to the heat exchange chamber; and piping connecting between the heating medium supply unit and the heat exchange chamber, whereby the interior of the developing tank is adapted to be controlled to a specified temperature.
Patent CA-1307287-C (CA)
Title: Process for the preparation of halopropyltrialkoxysilanes and halopropylalkylalkoxysilanes
Inventor: QUIRK JENNIFER M
IPC: C07F7/18
Filed: 1986-12-05
Granted: 1992-09-08
Abstract: Abstract A process for the preparation of halopropyltrialkoxysilanes and halopropylalkyl-alkoxy silanes comprising the hydrosilation of allyl halides with trialkoxysilanes and alkylalkoxysilanes in the presence of an iridium-containing dimer complex.
Patent CA-1330779-C (CA)
Title: Tamper evident plastic caps with lower separable or breakaway portions and a method of forming them
Inventor: THOMPSON MORTIMER S
IPC: B29C53/12
Filed: 1986-12-12
Granted: 1994-07-19
Abstract: ABSTRACT OF THE DISCLOSURE A cap for a container and a method of forming the cap.  In the method the cap is molded and includes a plastic skirt provided with a line of weakness.  An essentially concave surface of a curling tool engages the lower free end of the skirt and curves it into a curled resilient interfering free end which reduces the internal breadth of the plastic skirt prior to capping.  Upon capping the curled free end is adapted to provide an interference with the container so that upon initial removal of the cap the line of weakness separates to indicate the condition of the container.  The interfering curled free end of the plastic skirt can have a coil, O, U or J cross sectional shape.
Patent CA-1290531-C (CA)
Title: Composite transparent polyester films useable namely for the production of very shiny metallized films
Inventor: MIQUEL HUGUETTE
IPC: G11B5/64
Filed: 1987-02-13
Granted: 1991-10-15
Abstract: The invention relates to composite thermoplastic polyester films with outstanding transparency, low surface roughness and good machinability. These films contain, in at least one outer layer, 0.1 to 1% of fine particles with a volume median diameter of between 0.6 and 1.5 micrometers. After being metallized, these films produce highly glossy films with a particularly low gloss difference between the 2 faces.
Patent CA-1279559-C (CA)
Title: Frame saw and a method for its use
Inventor: LAGERQUIST OVE C
IPC: B27B3/00
Filed: 1987-05-06
Granted: 1991-01-29
Abstract: ABSTRACT     A method for sawing workpieces in frame saws, in which at least one saw blade mounted in an attachment device, such as a frame or the like, is caused to execute a substantially reciprocating movement.  Sawing of a workpiece advanced towards the blade is effected during at least a part of the blade movement.  The method is particularly characterized in that blade movement is effected by means of two eccentric devices each of which is journalled to and co-acts with a respective one of the two end parts of the attachment device.  At least one blade is, intended to extend substantially between the end parts.  Each end part is caused to execute a rotary movement about the rotational axis of the eccentric device located at this end part.  The invention also relates to an arrangement for carrying out the method.
Patent CA-1285473-C (CA)
Title: Latch and retrieving assembly
Inventor: SMITH SIDNEY K JR
IPC: E21B31/20
Filed: 1987-07-17
Granted: 1991-07-02
Abstract: ABSTRACT      A latch and retrieving assembly is shown for use with a well tool having an axial bore which includes an external landing shoulder and an annular latch recess which is spaced below the landing shoulder.  The assembly includes a mandrel which is inserted in to the bore of the well tool.   The mandrel has a lower abutment and a collet  member  carried  about  the  mandrel  above  the abutment. The collet member includes a carrier ring which is seatable on the shoulder and a  plurality of fingers which depend from the carrier ring and which terminate in radially enlarged tips which are disposed in registration with the recess when the carrier ring is seated on the landing shoulder.   The tips cooperate with the  lower abutment to latch into and to be released from the recess respectively  in  response to downward movement  of  the mandrel.  A special profile formed on the mandrel lower abutment  provides  latching  engagement  and  subsequent release of the assembly upon downward movement of the mandrel relative to the collet.
Patent CA-1278575-C (CA)
Title: N-(substituted cyclic alkyleneimine)-alpha -(3(5)-t-alkyl-4-hydroxyphenyl)-acetamides
Inventor: LAI JOHN T
IPC: C08K5/3462
Filed: 1987-07-20
Granted: 1991-01-02
Abstract: ABSTRACT OF THE DISCLOSURE         N-(substituted cyclic alkyleneimine)- ?-3,5-di-alkyl-4-hydroxyphenyl)-?, ?''-dialkyl  acetamides prepared by a new process are novel stabilizers for organic materials subject to attack and degradation, and form useful combinations for this purpose with other stabilizers against attack of polymer materials by heat, oxygen and light.
Patent CA-1309266-C (CA)
Title: Method of preparation and use of solid, phytoactive compositions
Inventor: DJAFAR ROGER R
IPC: A01N57/20
Filed: 1987-08-14
Granted: 1992-10-27
Abstract: METHOD OF PREPARATION AND USE OF SOLID, PHYTOACITVE COMPOSITIONS       Astract of the Disclosure A method for the preparation of a solid, phytoactive composition comprising:  (a) reacting an acid form of a phytoactive N-phosphonomethyl-N-carboxylmethyl compound with a liquid amine to form the amine salt of said N-phosphonomethyl-N-carboxylmethyl compound; (b) admixing said amine salt of said N-phosphonomethyl-N-carboxylmethyl compound with a molten surfactant, the surfactant being solid at ambient temperatures; and (c) cooling said mixture to a temperature below the melting point of the sur-factant to form a composition comprising said surfactant and said amine salt of N-phosphonomethyl-N-carboxylmethyl compound interdispersed in the matrix thereof and which is solid at ambient temperatures.
Patent CA-1276313-C (CA)
Title: Automatic printing apparatus utilizing turnaround document
Inventor: GARCIA DE OSUNA IGNACIO B
IPC: G06K7/00
Filed: 1987-08-19
Granted: 1990-11-13
Abstract: ABSTRACT    Automatic printing apparatus wherein an individual sheet item, initially bearing machine and human readable data, is utilized initially to identify and accumulate individual original data and thereafter is reemployed as a final repository for additional data from an external source of data.  The original data is compared with the additional data to determine correspondence or lack thereof.          Correspondence of the data produces a control output which causes the apparatus to print the additional data on the item and automatically to select an accept item receiving receptacle.  Lack of correspondence between the original data and the additional data produces a control output automatically to select a reject item receiving receptacle.
Patent CA-1291828-C (CA)
Inventor: STOLFO SALVATORE J
IPC: G06F15/12
Filed: 1987-08-31
Granted: 1991-11-05
Abstract: ABSTRACT OF THE DISCLOSURE           A plurality of parallel processing elements are connected in a binary tree configuration, with each processing element except those in the highest and lowest levels being in communication with a single parent processing element as well as first and second (or left and right) child processing elements.  Each processing element comprises a processor, a read/write or random access memory, and an input/output (I/O) device.   The I/O device provides interfacing between each processing element and its parent and children processing elements  so  as  to  provide  significant  improvements  in propagation speeds through the binary tree.  The I/0 device allows the presently preferred embodiment of the invention to be clocked at 12 megahertz, producing in the case of a tree of 1023 processors, each having an average instruction cycle time of 1.8  s, a system with a raw computational throughput of approximately 570 million instructions per second. The I/O device communicates data and queries from the root processing element to all other N processing elements in the array in one processor instruction cycle instead of in O(log2N) processor instruction cycles  as  in prior art binary tree  arrays. Primitive queries are executed in parallel by each processing element and the results made available for reporting back to the root processing element.   In several important cases, these results can be combined and reported back to the root processing element in a single processor instruction cycle instead of in O(log2N) processor instruction cycles as in prior art binary tree arrays.  Thus, the elapsed time for a broadcast and report operation is in effect a constant time regardless of the number of processors in the array.
Patent CA-1288190-C (CA)
Title: Size composition
Inventor: LEWIN DAVID F
IPC: C03C25/26
Filed: 1987-09-08
Granted: 1991-08-27
Abstract: SIZE COMPOSITION        ABSTRACT  Chrome-free aqueous size compositions containing quaternary salts reduce fuzz and fly in glass fiber gun roving.  The roving particularly achieves a desirable ease and completeness of chopping in conventional chopping and spraying equipment for molding operations.
Patent CA-1308764-C (CA)
Title: Industrial robot hand
Inventor: NO SHINICHIRO
IPC: B25J17/02
Filed: 1987-09-15
Granted: 1992-10-13
Abstract: ABSTRACT OF THE DISCLOSURE An industrial robot hand for materials handling com-prises; a fixed frame connected to an edge wrist portion of an arm of an industrial robot, and a movable frame having a rect-angular shape in plan which is horizontally movably supported to the fixed frame.  Two guide rods are vertically attached to each of four sides of the movable frame.  A guide which is downwardly extended in a tapered form is fixed to the edge portion of each of the guide rods.  Sandwiching plates are provided for opposite sides of the movable frame.  Each sand-witching plate is swingably attached by a horizontal axle at the central portion of the sandwiching plate.  Engaging mem-bers holding an article are inwardly extended from the lower inner surface of this plate.  Rollers and roller guides restricting the movement of the movable frame are provided between the fixed frame and the movable frame.  A driving mechanism moving the sandwiching plates in such a direction that the sandwiching plates come into engagement with the article is provided for the movable frame.
Patent CA-1303648-C (CA)
Title: Lock for doors or the like
Inventor: FRIEDRICHS BERND
IPC: E05C1/16
Filed: 1987-09-16
Granted: 1992-06-16
Abstract: ABSTRACT     The invention relates to a lock for doors or the like with a case     having a longitudinal axis    , a locking member      mounted in the case to be slidable parallel to the longitudinal axis, a bush      mounted in the case to be rotatable about an axis of rotation arranged at right angles to the longitudinal axis, and a drive having driving parts             on the locking member and on the bush for converting rotary movements of the bush into sliding movements of the locking member, the locking member being slidable by rotation of the bush at least out of a locking position into a retracted open position. So that the driving parts and the bush can be made sufficiently stable even with a small over-all height or a small total cross-section of the lock, the driving parts are arranged both in the locking position and in the open position of the locking member      in a space in the lock case located between the closing member     and the bush
Patent CA-1295013-C (CA)
Title: Power supply operable on varying inputs
Inventor: WILLIAMSON FLOYD L
IPC: H02M1/36
Filed: 1987-10-02
Granted: 1992-01-28
Abstract: Abstract A power supply provides the stable DC voltages needed for  a computer terminal from a wide range of  line voltages and frequencies.  The line is rectified and fed to a flyback transformer  wherein  primary  current   is  controlled   in duration  for  providing  the desired energy transfer to the secondary winding.  The  ouputs from the flyback transformer are rectified and filtered. A separate start-up circuit uses a  transformer  across  the  line  voltage,  and  a positive coefficient resistor  provides a time limit to allow the use of  a small transformer even though the line voltage may  be high.  The  start-up circuit must produce  a minimum voltage for  the switching transistor  in the flyback arrangement to allow  operation  of  the  power  supply, and  the start-up transformer is disconnected from the circuit after operation to prevent electromagnetic interference within the terminal.          The output from the  power supply is used in the  control of the switching transistor  so that, once the start-up circuit has achieved the needed  voltage level, the power supply can assist in maintaining the operation.
Patent CA-1289727-C (CA)
Title: Highly magnetic iron oxide powder
Inventor: BISHARA JERIES I
IPC: C01G49/02
Filed: 1987-11-05
Granted: 1991-10-01
Abstract: HIGH MAGNETIC IRON OXIDE POWDER    ABSTRACT     A highly magnetic isotropic iron oxide powder with a uniform particle size distribution and particle size in the range from 0.005 to 0.2 micrometer consists of a mixed iron oxide exhibiting gamma (Fe2O3) and ferrite (Fe3O4) structure, having the empirical formula Fe72-xO96' where x has a value between 2 to 7, an aspect ratio of at most 2:1 and a temperature coefficient of coercivity of less than -0.7% per degree Celcius.  The mixed oxide is optionally a cobalt-modified mixed iron oxide containing 2-6% by weight of cobalt and is obtained by heating ultrafine, ferrite particles in a controlled, oxidizing atmosphere at a temperature of 240°C. to 320°C. for a period of one to three hours.
Patent CA-1339123-C (CA)
Title: Penem derivatives, production and use thereof
Inventor: ISHIGURO MASAJI
IPC: A61P31/04
Filed: 1987-12-22
Granted: 1997-07-29
Abstract: This invention relates to novel penem compounds of the formula, (See Fig. I) wherein R is hydrogen or allyl, and A is an aliphatic 5- or 6- membered heterocyclic group having one or two oxygens in the ring and their pharmaceutically acceptable salts are produced from the compounds of the formula, (See Fig. II) wherein A is the same as above and respective R1 and R2 are protective groups for hydoxyl and carboxyl groups, through several steps. The compounds and their salts are useful as antibacterial agents.
Patent CA-1285398-C (CA)
Inventor: REID EDWARD A JR
IPC: F25B15/00
Filed: 1987-12-22
Granted: 1991-07-02
Abstract: ABSTRACT      This invention relates to a cooling and heating system which operates on the absorption and phase change heat exchange principle. More particularly it relates to a continuous heat actuated, air cooled, double effect generator cycle, absorption system.  In further aspects, this invention relates to a system constructed for use with an absorption refrigeration solution pair consisting of a nonvolatile absorbent and a highly volatile refrigerant which is highly soluble in the absorbent.  A disclosed refrigerant pair are ammonia as the refrigerant and sodium thiocyanate as the absorbent.     An absorption cycle is disclosed using the thermo physical properties of sodium thiocyanate/ammonia, absorption/refrigerant pair.  Also disclosed is the construction and configuration of a reverse cycle air cooled double effect generator absorption refrigeration system for use with the sodium thiocyanate/ammonia refrigeration pair, as well as subcompositions, subsystems and components that improve the system efficiency and reduce cost.
Patent CA-1297406-C (CA)
Title: Method of detecting and quantifying ligands in liquids
Inventor: HEVEY RICHARD C
IPC: G01N33/68
Filed: 1988-01-15
Granted: 1992-03-17
Abstract: METHOD OF DETECTING AND QUANTIFYING         LIGANDS IN LIQUIDS               Abstract of the Disclosure A method of determining a ligand of interest in a liquid is described.  The method, which makes it possible to detect and quantify a ligand in a liquid, makes use of a biotin-avidin system which can be used to carry out immunoassays in both heterogeneous and homogeneous format.  The basic components used in the method are a biotin-labeled substance (which is biotin-lableled ligand or biotin-labeled specific binding partner), biotin-labeled fluorophore, a liquid to be analyzed for the ligand of interest, specific binding partner for the ligand of interest and avidin.  The method can be used to determine the presence (or absence) and the quantity of avidin and biotin in a sample, using fluorescence polarization.
Patent CA-1277686-C (CA)
Inventor: DOANE JAMES J
IPC: A63B69/36
Filed: 1988-02-03
Granted: 1990-12-11
Abstract: ABSTRACT           A golf exercise device has a shaft with a grip at one end and a weight in the other, and a second lower grip parallel to the first, attached to the shaft between the first grip and the  weight,  offset  from  the  first  grip.    By  swinging  the invention in a swing similar to that of a golfer, the correct muscle memory is built up to enable the golfer to swing a golf club in a natural and correct manner.
Patent CA-1330278-C (CA)
Inventor: ACKLEY E MICHAEL
IPC: B41F17/00
Filed: 1988-02-05
Granted: 1994-06-21
Abstract: Abstract of the Disclosure A pellet marking device which does not rely upon contact between the marking device and the pellets to be marked in the course of its operation makes use of a system for carrying the pellet-shaped articles to be imprinted, and an ink-jet system for applying the indicia to the articles as the articles are carried through the apparatus.
Patent CA-1336797-C (CA)
Title: Multi-density shoe sole
Inventor: GIESE ERIK O
IPC: A43B13/12
Filed: 1988-02-10
Granted: 1995-08-29
Abstract: A composite shoe bottom is disclosed comprising a lower layer of firm material and an upper softer layer superposed thereon.  Each layer has an upper contoured surface such that the total compressibility of the shoe bottom, as determined by the relative thicknesses of the layers, is predetermined and differs along the surface.  The upper layer has an uppermost surface which is shaped to fit against and be complemental to the bottom of the foot of a wearer.
Patent CA-1334461-C (CA)
Inventor: BARTHELEMY PASCAL
IPC: C08G73/12
Filed: 1988-02-17
Granted: 1995-02-14
Abstract: Novel heat-stable imido polymers, well adapted for the production of a wide variety of useful shaped articles, comprise the coplymerizate of (a) at least one diorganopolysiloxylated N,N'-bismaleimide having the following general formula (I):   <IMAGE>   with (b) at least one other N,N'-bismaleimide comonomer, optionally, (c) at least one olefinically unsaturated comonomer copolymerizable with the bismaleimides (a) and (b), and, also optionally, (d) a catalyst.
Patent CA-1303925-C (CA)
Inventor: THOMSEN MERLIN
IPC: A61H23/04
Filed: 1988-02-19
Granted: 1992-06-23
Abstract: i.                  ABSTRACT OF THE INVENTION     A water jet massage apparatus comprises a platform having a bench mounted thereon, and an overlying lid arranged for pivotal movement between an open position in which a person may gain access to the bench and a closed position in which the lid is lowered onto the bench.  The lid includes top, front, rear, and opposite side walls, and also has a bottom wall formed of flexible, water-proof material which drapes over and covers a person reclining on the bench when the lid is closed.  The water-tight cavity in the lid defined by the aforementioned walls contains a laterally extending, longitudinally movable water manifold which mounts and supplies water to a plurality of pulsating water jet spray heads which direct a multitude of pulsating jets of water downward onto the flexible bottom wall which loosely covers a person reclining on the bench, keeping him dry.  Spent water from the water jet heads finds its way to side gutters in the chamber whereupon the water drains from the water-tight cavity into a holding tank where it is reheated and recycled continuously.  The effect is a multitude of pulsating massaging water jets impinging on the flexible material draped across the body, the spray head assembly also moving longitudinally through the chamber from head to toe or any desired portion thereof.