baber/WOPTO huggingface dataset:
Patent CA-2017912-A1 (CA)
Title: Semiconductor optical device
Inventor: UOMI KAZUHISA
IPC: H01S5/12
Filed: 1990-05-30
Abstract: Abstract: The present invention relates to an improvement for a semiconductor optical device having a region in which semiconductor or carriers in the semiconductor and light interact. For example, an active region for a semiconductor laser, an optical wave guide region of an optical modulator, etc. has a quantum well structure comprising a well region and a barrier region. A semiconductor optical device is disclosed which greatly improves the degree of freedom for the design of the device such as the thickness and the selection of material without deteriorating the quantum effect. This is achieved by introducing a super lattice super-layer structure into the barrier region of the quantum well structure or defining the strain for the well region and the barrier region.
Patent CA-2018964-A1 (CA)
Title: Method and apparatus for the fine adjustment of a potentiometer
Inventor: JACKSON CHARLES L
IPC: G01R35/00
Filed: 1990-06-13
Abstract: The proper adjustment of a potentiometer is achieved through the use of a software routine that detects the output frequency from a thermistor circuit and compares the detected frequency with a predetermined desired frequency.  A control signal is sent to either an adjustment means or a display means or both.  Thus, there is no need for external frequency meters elim-inating the disadvantages associated therewith to properly adjust a potentiometer.   The display means will activate the proper light emitting diodes such that said comparison is displayed.  The shaft of the potentiometer can then either be turned manually or automatically in the correct direction and to the correct degree so that a proper adjustment is achieved.
Patent CA-2019637-A1 (CA)
Title: Poly(perfluoroether)acyl peroxides
Inventor: WHELAND ROBERT C
IPC: C08G65/324
Filed: 1990-06-22
Abstract: This invention concerns novel polymeric perfluoroether aryl peroxides and an improved process for making them.
Patent CA-2020039-A1 (CA)
Inventor: NAKANO TETSUYA
IPC: G03G9/097
Filed: 1990-06-28
Abstract: Disclosed are a toner for developing a statically charged image and a process for the preparation thereof. If a toner for developing a statically charged image, comprising a binder resin and, dispersed therein, a colorant and a charge-controlling dye, is prepared so that it has a particle size distribution satisfying the requirement represented by the following formula:           N < -172.7C + 1.45         (1) wherein N represents the number (%) of particles having a particle size larger than 16 µm, as measured by Coulter Counter, and C represents the surface dye concentration (g/g) of toner particles, a copy having a high image density with a drastically reduced visible fogging can be obtained.
Patent CA-2020426-A1 (CA)
Title: Electrostatic dissipating polymeric material comprising ethylene oxide copolymer as an impact modifying agent
Inventor: MERTZEL ELAINE A
IPC: C08L71/00
Filed: 1990-07-04
Abstract: ABSTRACT OF THE INVENTION         The present invention is directed to a high impact electrostatic dissipating material having exceptional weathering ability comprising a first polymer having a glass transition temperature greater than 25°C and a second polymer comprising ethylene oxide copolymer, wherein the GPC molecular weight relative to polystyrene of the second polymer is less than about 200,000 and about 10 to 25 parts by weight of the second polymer are present in the material, based upon 100 weight parts of the first polymer.     In a preferred embodiment of the present invention, the second polymer is an ethylene oxide and epichlorohydrin copolymer having a weight ratio of less than about 80 parts ethylene oxide to greater than about 20 parts epichlorohydrin, wherein the GPC molecular weight relative to polystyrene of the second polymer is less than about 1,000,000.
Patent CA-2022136-A1 (CA)
Title: A method of measuring joint gaps and restoring same
Inventor: BERRONG DAVID B
IPC: F01D25/00
Filed: 1990-07-27
Abstract: The method of the present invention uses a combination of gap measurement methods to map the gap in a joint in a high pressure vessel such as a steam turbine or steam valve. An exposed and supported surface is hydraulically balanced allowing any twisting of the surface to be removed. The map is then created using a blue contact method, feeler gages, deformable gap measuring medium and laser profiling for both surfaces of the joint. A restoration plan is produced using the map which minimizes the restoration work and produces matching joint surfaces. The joint surfaces are welded and/or machined and finally finished in accordance with the plan. A laser can be used to guide or reference the machine tool. Matching joint surfaces, especially if relatively flat, provide a better high pressure seal than relatively flat surfaces that do not match while relatively flat surfaces that do match produce an even better seal.
Patent CA-2022249-A1 (CA)
Title: Memory device
Inventor: BISSETT THOMAS D
IPC: G06F11/16
Filed: 1990-07-30
Abstract: ABSTRACT OF THE DISCLOSURE    A memory for storing data in a computer system.          Integrity of data transferred to or from a memory array is monitored by transferring two sets of EDC or ECC data corresponding to a longword of data between the memory array and two separate memory controllers.  The probability of an undetected error is very low because the two  sets of EDC or ECC data are compared to ensure that they match.  The number of lines and pins used is minimized by multiplexing the EDC or ECC data with address signals and cycle type signals.  The address and cycle type signals are placed on the time division multiplexed bidirectional lines at the beginning of a memory transfer cycle, and the EDC or ECC data is placed on these time division multiplexed lines at times when a longword of data is being transferred on a set of bidirectional data lines.
Patent CA-2024243-A1 (CA)
Inventor: SCHWEITZER EDMUND O JR
IPC: G01R1/02
Filed: 1990-08-29
Abstract: An indicator for instantaneously indicating the presence of voltage on a monitored electrical conductor of an AC power distribution system utilizes a high impedance liquid crystal display component providing an "N" display in response to an applied signal.  The "N" segment display electrode and associated backplane display electrode are capacitively coupled to the monitored conductor and system ground to provide an "N" display when voltage is present on the conductor.
Patent CA-2025812-A1 (CA)
Title: Enhanced production of biosurfactant through the use of a mutated b. subtilis strain
Inventor: MULLIGAN CATHERINE N
IPC: C12N1/20
Filed: 1990-09-20
Abstract: ABSTRACT OF THE DISCLOSURE     A B. subtilis strain possessing an enhanced surfactin production potential. The strain is a mutant of B. subtilis ATCC 21332 and has at least one mutation between Arg4 and HisA1 sites of the genetic map of B. subtilis ATCC 21332. Also included in the present invention is B. subtilis strain having the identifying characteristics of ATCC 53813.
Patent CA-2031073-A1 (CA)
Title: Multiwell stat test
Inventor: POULETTY PHILIPPE
IPC: G01N37/00
Filed: 1990-11-29
Abstract: MULTIWELL STAT TEST                ABSTRACT OF THE DISCLOSURE        An apparatus is provided for the detection and semi-quantitative measurement of analytes.  The assay results are visualized by the formation on a filter of a colored annular or circular spot, the diameter of the spot being related to the concentration of the analyte of interest.  The filter on which the assay results are visualized is divided into multiple regions by strips of non-porous tape crossing the filter surface.  The invention also includes a component for diluting sample to a suitable concentration for analysis, and dispensing the diluted sample onto the test filter.
Patent CA-2033720-A1 (CA)
Title: Low modulus silicone sealants
Inventor: CHU HSIEN-KUN
IPC: C08L83/14
Filed: 1991-01-07
Abstract: A process for producing a silicone sealant, which is stable in the absence of moisture, cures when exposed to moisture, has an elongation at break of greater than 800 percent, and has adhesion to concrete. The silicone sealant is produced by first mixing an alkoxysilethylene endblocked polymer, a dialkyldialkoxysilane, and a titanium catalyst, then mixing in precipitated calcium carbonate filler having a fatty acid surface treatment.
Patent CA-2034776-A1 (CA)
Title: Discoloration-resistant spandex
Inventor: GOODRICH CHARLES W
IPC: C08K5/151
Filed: 1991-01-23
Abstract: ABSTRACT OF THE DISCLOSURE          An improved fiber or film of a polyether-based spandex polymer composition provides increased heat set efficiency and greater discoloration resistance to the fiber or film.  The polymer composition contains zinc oxide and a polyhydroxy additive selected from certain sugars, reduced sugars and/or polyhydroxy urethanes formed from these sugars or reduced sugars and an organic diisocyanate.     (LI-005218)
Patent CA-2037144-A1 (CA)
Title: Heat exchanger apparatus, particularly for hybrid heat pumps operated with non-azeotropic work fluids
Inventor: BERGMANN GYOERGY
IPC: F25B9/00
Filed: 1991-02-26
Abstract: HEAT EXCHANGER APPARATUS, PARTICULARLY FOR HYBRID  HEAT    PUMPS OPERATED WITH NON-AZEOTROPIC WORK FLUIDS                         ABSTRACT   Heat  exchanger  apparatus comprising  a  substan-tially horizontal countercurrent heat exchanger of  the shell-and-tube type, particularly for hybrid heat pumps operated  with  non-azeotropic work fluids,  wherein  a fluid  distributor  (33) with fluid  outlets  (40)  the number  of which corresponds to the number of the  heat exchanger  tubes  (22) of the heat  exchanger  (21)  is provided  upstream  the heat exchanger (21),  the  heat exchanger tubes (22) of which are connected each to one fluid outlet (40) of the fluid distributor (33).          (Fig. 1)
Patent CA-2041189-A1 (CA)
Title: Apparatus for assessing the stiffness of a sheet
Inventor: HAIN DAVID A
IPC: G07D7/182
Filed: 1991-04-25
Abstract: APPARATUS FOR ASSESSING THE STIFFNESS OF A SHEET            Abstract The invention relates to an apparatus (2) for assessing the stiffness of a sheet (4), such as a currency note, by measuring the extent and rate of movement of the trailing edge of the sheet (4) away from a feed path for the sheet.  Such movement is part of a straightening movement of the sheet (4) upon disengagement of the trailing edge from constraining means (34) when a leading portion of the sheet (4) is in a bent condition.
Patent CA-2041694-A1 (CA)
Title: Expandable tree trunk protector
Inventor: DIPOCE JOHN
IPC: A01G13/10
Filed: 1991-05-02
Abstract: ABSTRACT         A tree protector is disclosed which is characterized by an elongate sheet of material adapted to be placed along the ground, which is joined at its end to form a closed loop about the tree. An accordion pleated central portion is provided between the ends to maintain the protector close to the tree and permits expansion of the protector as the tree grows.
Patent CA-2042000-A1 (CA)
Title: Method and apparatus for repaving asphaltic pavement
Inventor: WILEY PATRICK C
IPC: E01C23/12
Filed: 1991-05-07
Abstract: ABSTRACT     An asphaltic pavement preconditioning machine to remove  and  grind  up  old asphalt  so  that  it  can  be rejuvenated.   The method and apparatus heats a strip of asphalt, grinds a first strip portion and moves the ground asphalt to a second strip portion leaving behind an exposed unruptured, unsoftened layer.  Both the ground material and the previously heated unground asphalt in the second strip are then ground.   The exposed hard asphalt in the first strip is heated, softened and then ground and moved onto the first strip portion.  The heat from the ground asphalt lying over the centre strip portion softens the unground asphalt there which is subsequently ground together with the ground material and left for further processing.  At least three heating and grinding steps are effected so that the  depth  of  asphalt  requiring  softening  by  heat  is approximately  1/2  to 5/8  inches and smoke emission  is substantially lower than prior methods.
Patent CA-2045081-A1 (CA)
Title: High power semiconductor device with integral heat sink
Inventor: WEBER ROBERT J
IPC: H01L23/34
Filed: 1991-06-20
Abstract: ABSTRACT OF THE DISCLOSURE    A high power semiconductor device with integral heat sink capable of accommodating substantial heat flux on the order of one kw per cm2.  The integral heat sink is formed on the active surface of the semiconductor and utilizes an AlN thin film of high purity to provide a low thermal impedance heat conductor for removing heat directly from the active semiconductor surface.  A microchannel heat sink is formed on the AlN thin film and has a source of cooling fluid flowing through the microchannel heat sink for conducting heat away from the sink.  The result is the ability to conduct large heat fluxes away from the intimately contacted heat generating semiconductor surface to the cooling fluid in the microchannel heat sink and thus operate the semiconductor under substantially higher power than has been practical heretofore in a device of such simplicity.
Patent CA-2047126-A1 (CA)
Inventor: GUARALDI GLENN A
IPC: B41F31/14
Filed: 1991-07-16
Abstract: An offset printing apparatus rotates the plate cylinder steadily with a minimum of torsional interference caused by impact of the reciprocating doctor roll with the vibrator roll. The doctor roll is reciprocated at a rapid rate to impart a rapid succession of torsional shocks to the vibrator roll and thereby to urge the gear train toward a steady-state condition wherein a level of torsional loading is maintained without substantial change in response to reciprocation of the doctor roll.
Patent CA-2047511-A1 (CA)
Title: Fungicide intermediates
Inventor: CROWLEY PATRICK J
IPC: C07C53/21
Filed: 1991-07-22
Abstract: ABSTRACT              FUNGICIDE INTERMEDIATES   Certain fluoroalkanoic acids and derivatives, including 2-fluoroisobutyric acid and 2-fluoroisobutyryl chloride, useful as intermediates for fungicides, and methods of preparing them.
Patent CA-2051739-A1 (CA)
Title: Electronic apparatus and method for grounding electronic apparatus
Inventor: WATANABE HARUO
IPC: H01H3/16
Filed: 1991-09-18
Abstract: An electronic apparatus which is placed in an operation wait state by fully closing a cover having an electrical component, and a method for grounding the electronic apparatus is disclosed.  The apparatus includes a cover-side contact element electrically connected to the electric component, and a body-side contact element electrically connected to a grounding member of the apparatus. Both contact elements are brought into contact with each other so as to electrically connect the electrical component with the grounding member of the apparatus when the cover is fully closed.  Thus, grounding of the electrical component can be ensured without using a conductive wire for connecting the electrical component with the grounding member of the apparatus.  Furthermore, a malfunction of the electrical component caused by an electrostatic charge is prevented, while reducing troublesome assembly work and the number of components.  In addition, since the apparatus includes a switch comprising a displacement element provided on at least one of the two contact elements, the opened and closed positions of the cover can be detected in response to a displacement of the displacement element. Thus, an exclusive switching unit such as a microswitch and an operational member for actuating an actuator of the switching unit are not required.  The apparatus can therefore detect a full closed position of the cover without increasing the number of components and the overall size of the apparatus.
Patent CA-2052129-A1 (CA)
Title: Transparent liquid absorbent materials for use as ink-receptive layers
Inventor: IQBAL MOHAMMAD
IPC: B41M5/50
Filed: 1991-09-24
Abstract: This invention relates to a recording sheet, more particularly, a transparent recording sheet suitable for use with ink-jet printers. Transparencies for use with overhead projectors can be produced by imagewise deposition of liquid ink of various colors onto thin, flexible, transparent polymeric sheets. In the case of imaging onto polymeric film, some means of absorbing aqueous liquids is needed if satisfactory drying of the image is to occur. Because simple polymeric systems are generally either limited in absorbency or in structural integrity, compositions useful as transparent liquid absorbent materials have been formed by blending a liquid-insoluble or low absorbent material with a liquid-soluble, or high absorbent material. A problem that frequently arises in the formulation of polymer blends is the incompatibility of the polymers being blended. When attempts are made to blend polymers that are incompatible, phase separation occurs, resulting in haze, lack of transparency, and other forms of inhomogeneity. This invention provides a transparent recording sheet suitable for ink-jet printers comprising a transparent support bearing on at least one major surface thereof a light transmissive ink-receptive layer containing a hydrophilic polymer crosslinked by polyfunctional aziridine. The recording sheet remains transparent even after ink is absorbed and provides a fast drying, durable, non-tacky transparency suitable for use with an overhead projector.
Patent CA-2053549-A1 (CA)
Title: Construction of high temperature josephson junction device
Inventor: AGOSTINELLI JOHN A
IPC: H01L39/24
Filed: 1991-10-16
Abstract: IMPROVED CONSTRUCTION OF HIGH TEMPERATURE JOSEPHSON JUNCTION DEVICE       Abstract of the Disclosure A Josephson junction device is disclosed having a substrate upon which are located overlying and underlying high temperature crystalline oxide superconductive layers separated by an interposed impedance controlling layer.  The underlying superconductive layer is limited to a selected area of the substrate while the overlying and interposed layers overlie only a portion of the underlying superconductive layer.  Nonsuperconducting oxide layer portions laterally abut the superconductive and interposed layers.  A first electrical conductor is attached to the underlying superconductive layer at a location free of overlying oxide layers, and a second electrical conductor contacts the overlying superconductive layer and extends laterally over the adjacent laterally abutting nonsuperconductive layer portion.          A process is disclosed for preparing the Josephson junction device in which a Josephson junction layer sequence is deposited on a substrate, a portion of the Josephson junction layer sequence laterally abutting a selected area is converted to a nonsuperconducting form, within the selected area overlying layers are removed from the superconducting layer nearer the substrate, and an electrical conductor extends laterally from the superconducting layer farther removed from the substrate to the laterally abutting nonsuperconducting layer.
Patent CA-2054334-A1 (CA)
Inventor: BETZIG ROBERT E
IPC: G01Q60/18
Filed: 1991-10-28
Abstract: An optical system useful, e.g., for near-field scanning optical microscopy is provided. The system incorporates a probe 20 having improved properties. In one embodiment, the probe comprises a tapered and partially metallized portion of a single-mode optical fiber 70.
Patent CA-2057721-A1 (CA)
Inventor: SIMARD CLAUDE J M
IPC: B60J7/08
Filed: 1991-12-16
Abstract: A rigid cover assembly for use on an open top box  body is  particularly adapted for trucks carrying  loose  goods.   The cover  assembly has an arched shape lid within which are  located tilted  piston devices for pivoting the cover assembly  over  the box body.  The piston devices extend between the top edges of the front  and the rear wall of the box body up to  locations  inside the lid adjacent the respective front and rear walls.  The lid is provided with openings for loading the box body with loose goods.
Patent CA-2059861-A1 (CA)
Title: Terminal structure for an optical device
Inventor: KOMATSU KOYA
IPC: G02B6/26
Filed: 1992-01-22
Abstract: An optical terminal structure includes a single mode optical fiber having a short length, and a cylindrical member in which the single mode optical fiber is fixed. The cylindrical member is coaxial with the core of the single mode optical fiber. The cylindrical member has at each end a facet that is polished to a mirror finish. The core and a clad of the single mode optical fiber have refractive indexes such that the normalized frequency in the operation of the single mode optical fiber becomes at most 2.405 as a value converted at a wavelength in use of 1.28 µm. The wavelength in use is preferably in the range of 1.29 to 1.33 µm.
Patent CA-2060531-A1 (CA)
Title: Cooling tower with different resistance to gas flow
Inventor: PHELPS PETER M
IPC: F28C1/04
Filed: 1992-02-03
Abstract: ABSTRACT          A crossflow gas-liquid cooling tower including an upper and a lower liquid crossflow cooling section, both including substantially all film fill and/or splash fill, the total of the fill components of the upper liquid crossflow cooling section having a gas velocity head resistance substantially higher than that of the total  of the fill  components of the lower liquid crossflow cooling section.
Patent CA-2062666-A1 (CA)
Title: Combined adhesive strip and transparent dressing delivery system
Inventor: HEINECKE STEVEN B
IPC: A61F13/15
Filed: 1992-03-11
Abstract: A system for delivering both adhesive strips and transparent dressings to a patient. The adhesive strip or strips are provided with tab means for enhanced handleability and easy removal of the adhesive strip, and are releasably adhered directly to either the release liner or carrier layer of the transparent dressing.      Preferably, the tab means is an integral part of one of the layers provided for delivery of the thin film dressing. Specifically, either the release liner or the carrier layer is provided as separately removable portions, and the adhesive strip is attached to the release liner or the carrier layer across the adjoining edge of these portions to allow removal of one portion from the balance of the composite at a time. When one portion is so removed, the adhesive strip is also removed and remains attached to that removed portion. The adhesive strip may then be easily handled for delivery to the desired site on the patient.
Patent CA-2063129-A1 (CA)
Title: Rubber stock containing high trans polybutadiene
Inventor: SANDSTROM PAUL H
IPC: C08K5/34
Filed: 1992-03-16
Abstract: Abstract of the Disclosure RUBBER STOCK CONTAINING HIGH TRANS POLYBUTADIENE      The present invention relates to a rubber stock comprising (A) based on 100 parts by weight of rubber (1)  from about 5 to about 25 weight percent of a trans 1,4-polybutadiene rubber wherein at least 65 percent of its butadiene repeat units are a trans 1,4-isomeric structure; and (2) from about 50 to about 95 weight percent of cis 1,4-polyisoprene, and (3) from about 0 to about 30 weight percent of the rubber selected from the group consisting of styrene-butadiene rubber, medium vinyl polybutadiene rubber wherein from about 40 to about 60 percent of its butadiene repeat units are a 1,2-vinyl isomeric structure and a cis 1,4-polybutadiene rubber wherein at least 90 percent of its butadiene repeat units are a cis 1,4-isomeric structure; (B) from about 0.1 to about 10 phr of a methylene acceptor; and (C) from about 0.1 to about 10 phr of a methylene donor.
Patent CA-2063991-A1 (CA)
Title: Zeolite ssz-33
Inventor: ZONES STACEY I
IPC: B01J29/70
Filed: 1990-04-26
Abstract: A crystalline zeolite SSZ-33 is prepared using a quaternary ion as a template.