baber/WOPTO huggingface dataset:
Patent CA-2102721-C (CA)
Title: Differential gain stage for use in a standard bipolar ecl process
Inventor: WEBSTER STEPHEN
IPC: H03F1/08
Filed: 1993-11-09
Granted: 1999-05-04
Abstract: An improved differential gain stage for use in a bipolar monolithic integrated circuit comprising a substrate formed from a semiconductor, the differential gain stage including a first transistor having input, output and control terminals, and a second transistor having input, output and control terminals, the control terminal of the first transistor being coupled to the control terminal of the second transistor, the input terminal of the first transistor forming a non-inverting input for the gain stage and the output terminal providing an inverting output for the gain stage, and the input terminal of the second transistor forming an inverting input for the gain stage and the output terminal providing a non-inverting output for the gain stage. The differential gain stage having a capacitor stage comprising: (a) a peaking capacitor having first and second terminals and being coupled between the control terminals of the first and second transistors; (b) first and second capacitor means located at a first spaced relationship from the substrate and the first capacitor means being coupled to the control terminal of the first transistor and the second capacitor means being coupled to the control terminal of the second transistor; (c) third and fourth capacitor means located at a second spaced relationship from the substrate and the third capacitor means being connected to the first capacitor means and the connection forming a first node and the fourth capacitor means being connected to the second capacitor means and the connection forming a second node; (d) first buffer means having an input connected to the non-inverting input of the gain stage and an output connected to the first node;and (e) second buffer means having an input connected to the inverting input of the gain stage and an output connected to the second node.
Patent CA-2105659-C (CA)
Inventor: BARNSLEY PETER EDWARD
IPC: H04B10/61
Filed: 1992-05-07
Granted: 1998-07-07
Abstract: In a high speed optical clock extraction arrangement, an incoming digital signal is divided between two paths (11, 25). The signal on one path (25) is fed direct to a receiver (203), while the signal on the other path (11) is fed to a non-linear optical amplifier (1) which has separate gain and absorbing regions. The non-linear optical amplifier (1) is triggered by the incoming signal to pulsate at a clock frequency contained in the signal, and the resultant strong output clock signal is coupled into the path (25) carrying the incoming signal to the receiver (203). The non-linear optical amplifier (1) can provide a very high frequency clock output as a result of selective modification of the carrier lifetime.
Patent CA-2111007-C (CA)
Title: Process for removal of hydrogen fluoride
Inventor: TSUDA TAKEHIDE
IPC: C07C19/03
Filed: 1993-04-09
Granted: 2004-08-03
Abstract: Hydrogen fluoride is effectively removed from a mixture of hydrogen fluoride, dichloromethane, chlorofluoromethane and/or difluoromethane by distilling the mixture so that two-component azeotropic mixtures of hydrogen fluoride and dichloromethane, hydrogen fluoride and chlorofluoromethane and hydrogen fluoride and difluoromethane are removed, or by liquid-separating the mixture into an upper liquid phase rich in hydrogen fluoride and a lower liquid phase not rich in hydrogen fluoride before each liquid phase is so distilled.
Patent CA-2112308-C (CA)
Title: Method of making white diamond film
Inventor: BIGELOW LOUIS K
IPC: C30B29/04
Filed: 1993-12-23
Granted: 2000-08-15
Abstract: Diamond film with substantially no non-diamond carbon and a high thermal conductivity is deposited by means of a direct current arc jet apparatus with a substrate temperature below about 975 degrees Celsius, an arc power of between about 20 and 40 kw. a pressure of about 12 torr, and an enthalpy greater than 30 from a activated gas jet fed with hydrogen and methane, the methane being supplied at a concentration of less than 0.07%. The resulting material has a high transparency and thermal conductivity.      Also disclosed is the use of the diamond material made by the present method for cutting tool applications, particularly milling.
Patent CA-2115813-C (CA)
Title: Method and device for the separation of a contaminated top layer
Inventor: VAN SCHIE LOUIS
IPC: B01D17/028
Filed: 1994-02-16
Granted: 2005-01-25
Abstract: For the separation of a contaminated floating top layer of oil or oil substances, a continuous laminar flow is created on or near the surface, in order to achieve a high efficiency. The special feature of this is that the optimum separation of the contaminated oil liquid is achieved by creating a drop in the level of the liquid to be cleaned as it passes from the inflow area to the discharge area, after separation has occurred. The creation of this is controlled by a number of parameters, such as the flow, the thickness of the layer, etc. and, furthermore, by placing a number of baffles (8 8') in the path of the flowing liquid (V) as it moves through a tank (1).  The total amount of liquid flowing through the tank (1) is now adjusted in such a way that the correct control of the upper laminar flow (S) and the dominant more turbulent lower flow near the bottom (9) of the tank (1) produces a controllable constant difference in height (.delta.h). This total difference in height (.delta.h) can also be attained by cascade operation.
Patent CA-2117947-C (CA)
Inventor: LANDIS HENRY J II
IPC: B65D83/08
Filed: 1994-10-12
Granted: 1998-07-14
Abstract: An improved container assembly for the storage and dispensing of pre-moistened towelettes is provided.          The assembly includes a container and a multi-function cap.   The cap matably engages the upper end of the container and further provides an additional storage area for the storage and retention of partially used towelettes.    The  cap  also  provides  a  relatively airtight seal to keep the towelettes moist and prevent them from prematurely drying out.  A flexibly web in the  cap  enables  the  towelettes,  connected  to  one another by perforations, to be pulled through the web of the cap.  An individual towelette is separated from the roll with a sharp jerk or tub which tears the towelette  along  the  perforation  and  leaves  the remaining towelette extending partially through the web.  An area underneath the top closure member of the cap and the web provides a sealed area for the storage of partially used towelettes.  A strap which connects the top closure member to the upper closure portion of the cap provides a handle for the initial removal of the cap from the container so that the consumer may feed the first towelette through the web.  The matable engagement between the lower portion of the cap and the top portion of the container provides a secure and snug fit yet enables the cap to be removed by the consumer under relatively easy manual pressure.
Patent CA-2131859-C (CA)
Title: Rotary piston well tool
Inventor: PRINGLE RONALD EARL
IPC: E21B4/18
Filed: 1994-09-12
Granted: 1997-11-04
Abstract: A well tool having an elongate circular body with an enclosed fluid bore extending longitudinally therethrough. A fixed plate extends radially between the bore and the body and a rotatable piston extends between the enclosed bore and the body and is rotatable about the enclosed bore. A hydraulic control line extends longitudinally to a position between the plate and the piston for rotating the piston. The tool may be an orientation tool and include a rotatable mandrel actuated by the piston. A recocking spring is provided recocking the piston and valve means are provided in the hydraulic line for admitting and venting fluid from the piston.
Patent CA-2139847-C (CA)
Inventor: MATSUHISA AKIO
IPC: C12N15/11
Filed: 1993-07-07
Granted: 2002-05-21
Abstract: A probe useful for rapidly detecting and identifying bacteria causative of infectious diseases is provided by completely digesting DNAs extracted from principal bacteria causative of infectious diseases with HindIII, cloning the digestion product to a suitable vector, and selecting a probe containing DNA fragments peculiar to each of the bacteria. A standard DNA sequence suitable for comparison with that of a genomic DNA contained in a clinical specimen is provided by clarifying the base sequence of the selected probe.
Patent CA-2149510-C (CA)
Title: Combustion apparatus
Inventor: MORITA SHIGEKI
IPC: F23D17/00
Filed: 1991-06-27
Granted: 1996-11-12
Abstract: A combustion apparatus comprises a mixture feeding pipe through which a mixture of pulverized coal and combustion air flows.  The mixture is injected into a furnace through the mixture feeding pipe and then ignited.  A radial outwardly flared flame maintaining ring is provided at the tip end of the mixture feeding pipe.  The flame maintaining ring is under a reduction atmosphere and exposed to high temperatures due to radiant heat from the furnace.  Therefore, there is a possibility of burnout of the flame maintaining ring or growth of slag on the flame maintaining ring.  In order to prevent this, a projection is disposed to extend into the furnace beyond the flame maintaining ring so as to shut off radiation from the inside of the furnace to the flame maintaining ring adequately, thereby suppressing an excessive temperature rise.  Combustion air flows along the surface of the projection so as to locate the projection under an oxidation atmosphere.  A pulverized coal/air separating member extends through within the mixture feeding pipe.  A portion where separation of the flow is forcibly occurred is formed locally in a conical end portion of the pulverized coal/air separating member.  It is therefore possible to effect a combustion in a stabilized manner as a whole regardless of the unit capacity and load of the combustion apparatus.
Patent CA-2152956-C (CA)
Inventor: ORAVALA HANS
IPC: H01G2/14
Filed: 1993-12-09
Granted: 2002-03-12
Abstract: A capacitor which is provided with internal protection and in which plastic film is wound around a core tube (3) to form a capacitor cylinder (2). Metallic contact surfaces (4, 5) are formed at the ends of the cylinder to connect connecting leads, and a fusible portion (9) is provided between the second contact surface (5) and the phase lead, said fusible portion (9) serving both as a thermal fuse and as an overload protector.
Patent CA-2156607-C (CA)
Title: Production of attrition-resistant catalyst binders through use of delaminated clay
Inventor: DEMMEL EDWARD J
IPC: B01J37/00
Filed: 1994-02-07
Granted: 1998-09-01
Abstract: Attrition-resistant binders can be prepared by a process wherein a slurry of delaminated and calcined clay particles is brought to either a low pH level (e.g., 1.0 to 3.0) or to a high pH level (e.g., 14.0 to 10.0) and mixed with a phostate-containing compound in a concentration of from about 2.0 to about 20.0 weight percent. Preferably, the resulting slurry is spray dried and the particulate products of the spray drying are then calcined to produce attrition-resistant binder particles.
Patent CA-2165668-C (CA)
Inventor: CHOY CLEMENT K
IPC: C11D3/395
Filed: 1994-07-20
Granted: 2000-05-30
Abstract: The invention is a hard surface abrasive scouring cleanser having no significant syneresis, undue viscosity or yield stress increase, stably suspends abrasives, and has excellent rinsing characteristics. Furthermore, the present invention provides a stably suspended abrasive scouring cleanser which uses relatively small amounts of surfactants, thus lowering the total cost of producing these cleansers. The lesser amount of surfactant also affords the cleanser a milder feel and lower unaesthetic surfactant odor, while also requiring lower levels of fragrance. The absence of solvents results in a less irritating product as well. In one aspect the invention comprises, in aqueous solution: (a) a cross-linked polyacrylate; (b) at least one nonionic surfactant; (c) a pH adjusting agent; and (d) a calcium carbonate abrasive. In a further aspect the invention comprises, in aqueous solution (a) a cross-linked polyacrylate thickener; (b) a mixed surfactant system which comprises one anionic surfactant and an amine oxide nonionic surfactant; (c) a pH adjusting agent; (d) a hydrotrope; and (e) a particulate abrasive.
Patent CA-2167277-C (CA)
Inventor: HAMMEKE MICHAEL N
IPC: E21B43/12
Filed: 1995-01-05
Granted: 1999-11-16
Abstract: Formation injection tool (10) disposable in production well casing (C) includes upper intake flow control assembly (24), middle seal mechanism (26), and lower discharge flow control device (28). Upper intake flow control assembly (24) is attached to a lower end of pump (12) extending downward within well casing (C) past and below upper productive formation (P). In response to upstroke of pump (12), upper intake flow control assembly (24) permits one-way flow of undesired heavier fluid, such as water, from upper productive formation (P) downwardly and into upper intake flow control assembly (24) concurrently as desired lighter fluid, such as oil and/or gas, flows from upper productive formation (P) upwardly within well casing (C) to ground surface (G). Middle seal mechanism (26) establishes a closure seal within well casing (C) between upper productive formation (P) and lower disposal formation (D). In response to downstroke of pump (12), lower discharge flow control device(28) permits only one-way flow of the undesired heavier fluid from upper intake flow control assembly (24), downwardly through middle seal mechanism (26), and from lower discharge flow control device (28) to lower disposal formation (D).
Patent CA-2173843-C (CA)
IPC: A61C13/00
Filed: 1994-09-29
Granted: 1999-03-09
Abstract: A method and system for preparing a cast post and core in a dental root canal procedure is provided. The method comprises the steps of removing the root canal material from the tooth (49); cutting out a posthole (47) in the tooth having a substantially uniform width; cutting out at least one annular tier (56) along the hole (47); placing a burnout post (61) having at least one flange (67) into the posthole (47) so that the flange (67) is seated on the annular tier (56); applying an acrylic resin onto the tooth and over the burnout post (61) in order to form a core (75), and finally removing the core (75) with the burnout post (61) from the tooth in order to form a casting.
Patent CA-2174617-C (CA)
Inventor: WEHRMAN JOSEPH GERARD
IPC: B01D53/047
Filed: 1996-04-19
Granted: 2001-06-12
Abstract: Method and apparatus for using a centrifugal compressor during the exhaust portion of the cycle in a pressure vessel used to separate components from a gaseous mixture by pressure swing or vacuum swing adsorption.  Energy input to the motor of an electrically driven motor-compressor is minimized at a time when the exhaust portion of the cycle is initiated allowing rotation of the compressor wheel to decelerate by contact with the absorbed gaseous components until the speed of rotation of the compressor wheel matches the efficient compression ratio for the compressor and then reenergizing the motor to increase the speed of rotation of the compressor wheel according to the best efficiency curve for said compressor until a full outlet to inlet pressure ratio across said compressor is achieved.
Patent CA-2175987-C (CA)
Inventor: TWENTER BYRON T
IPC: H01H71/12
Filed: 1996-05-07
Granted: 2005-07-12
Abstract: A resettable internal actuating mechanism, used in an electronic sectionalizer having a tube assembly movable between a closed position and an open position, includes a latching element of an electro-mechanical component mounted in the tube assembly and biased to move to an extended position and movable to a retracted position in response to receipt of an electrical signal, an actuating member spaced from the latching element and mounted in the tube assembly and being biased to move from a non-actuated position to an actuated position, and a linking lever mounted in the tube assembly between the latching element and the actuating member and biased to pivotably move from a latched position to an unlatched position.      The linking lever has opposite ends latched respectively to the latching element and actuating member when the linking lever is at the latched position and the latching element is at the extended position to thereby hold the actuating member at the non-actuated position. The opposite ends of the linking lever unlatches respectively from the latching element and from the actuating member in response to the latching element being moved to the retracted position to thereby release the linking lever to move to the unlatched position and the actuating member to move to the actuated position. By moving from the non-actuated to the actuated position, the actuating member extends outwardly from the bottom end of the tube assembly and moves an external latching mechanism of the electronic sectionalizer from a locking position to a releasing position to cause movement of the tube assembly from the closed to the open position.
Patent CA-2177662-C (CA)
Title: Paint brush with co-injection molded handle and method of making same
Inventor: BARKER RICHARD L
IPC: B29C44/38
Filed: 1996-05-29
Granted: 2006-03-21
Abstract: A paint brush handle has an outer layer of a comfortable, relatively soft elastomeric material that surrounds a rigid core of foamed polyolefin. The handle is made using a co-injection process in which a mold cavity is first coated by an initial partial shot of the elastomeric material and then filled by injecting more elastomeric material and polyolefin material containing a foaming agent simultaneously. The simultaneous shot of these materials is achieved by injecting the materials through a single inlet passage into the mold cavity in which the flows are concentric, with the elastomeric material surrounding the polyolefin material. The ferrule is attached to the handle using nails or other suitable fasteners which penetrate into the rigid inner core.
Patent CA-2178717-C (CA)
Inventor: KOURTAKIS KONSTANTINOS
IPC: B01J29/06
Filed: 1995-01-10
Granted: 2006-11-14
Abstract: This invention provides an attrition resistant catalyst composition and method for producing such composition. The catalyst is comprised of an acidic zeolite, rho or chabazite, and a particulate binder, kaolin, bentonite, alpha-alumina, or titania, which can be optionally modified by treatment with a compound containing Si, Al, P or B. This invention further provides a process for producing methylamines, preferably dimethylamine, comprising reacting methanol and/or dimethyl ether and ammonia in the presence of a catalytic amount of an attrition resistant catalyst of the invention.
Patent CA-2180754-C (CA)
Inventor: PALTAUF FRIEDRICH
IPC: C07F9/10
Filed: 1995-11-22
Granted: 2000-01-11
Abstract: L'invention concerne des désoxy glycéro-phosphoéthanolamines substituées par hétéroaryle, actives sur le plan thérapeutique, qui ont la formule générale (I) dans laquelle parmi X, Y et Z, un désigne un substituant d'éther gras, un désigne un substituant de composé cyclique hétéroaryle ayant entre 1 - 4 azotes comme seuls hétéroatomes, dont un est lié à un carbone du squelette glycéryle, et un est un substituant de phosphoéthanolamine, substitué au niveau de l'azote, sous réserve que chacun de X, Y et Z soit un substituant différent. L'invention concerne également des intermédiaires utilisés dans des procédés servant à préparer des composés de la formule (I). Les intermédiaires sont représentés par une modification de la formule générale (I) dans laquelle le substituant de la phosphoéthanolamine est remplacé par un groupe hydroxyle. L'invention inclut tous les isomères et les stéréoisomères optiques des composés de la formule (I) et les intermédiaires et les sels de ces composés, y compris les isomères. Ces composés actifs sur le plan thérapeutique, ont des effets anti-psoriatiques et anti-inflammatoires. L'invention comprend des compositions pharmaceutiques contenant ces composés actifs sur le plan thérapeutique, ainsi que des procédés d'utilisation de ces composés à effet thérapeutique pour traiter des tumeurs cancéreuses, le psoriasis et les phénomènes inflammatoires.
Patent CA-2180905-C (CA)
Inventor: ISHIZU FUMIO
IPC: H04L27/00
Filed: 1996-07-10
Granted: 2000-01-25
Abstract: A digital demodulator capable of a high speed operation.          An automatic frequency controller (AFC) estimates a frequency deviation .DELTA..omega. on the basis of a detected sample signal which is outputted at an oversampling interval by a receiving filter.          The AFC can estimate the frequency deviation before a stable operation of a bit timing recovery circuit (BTR).  The AFC generates a frequency deviation correcting signal for each decision timing on the basis of the estimated frequency deviation, and decision timing information from the BTR.  A multiplier eliminates a frequency deviation component from an input signal in response to the frequency deviation correcting signal.
Patent CA-2181132-C (CA)
Inventor: DRESHER MICHAEL J
IPC: A01B35/28
Filed: 1996-07-12
Granted: 1999-06-01
Abstract: The residue wheel has a plurality of multiply bent spring-steel tines that project outwardly from their central hub at such angles that straight foot portions of the tines engage and lie flatly against the ground as the tines sweep residue rearwardly and outwardly during rotation of the wheel about an axis oblique to the path of travel of the planting machine. The tines are equally spaced about the wheel but are arranged in pairs, comprising individual legs of a generally U-shaped, integral unit having a bight at the inner ends of the the legs that joins the legs together and serves as a means by which the unit can be clamped between opposed, flat plates of the hub. Short downturned driving prongs at the outer ends of the legs provide traction for the wheel during use.
Patent CA-2181148-C (CA)
Inventor: PERHOLTZ RONALD
IPC: G06F1/00
Filed: 1995-01-13
Granted: 2007-01-09
Abstract: A system and method for accessing, controlling and monitoring a data processing device (6) in which a video raster signal from the data processing device is analyzed to determine the information displayed on a video display monitor (9) attached to the data processing device (6) is used. The video rastersignal is converted to a digital form and a cyclic redundancy check is performedon the digital data to determine the information contained in the video raster signal and to generate a compressed representation of that information. The information may then easily and quickly be transmitted to a remote location (1) for analysis and review. Additionally, commands from the remote location (1) can be transmitted to the system to control the data processing device (6).
Patent CA-2181955-C (CA)
Title: Absorbent article of pants type
Inventor: YAMAMOTO MASAMITSU
IPC: A61F13/496
Filed: 1996-07-24
Granted: 1999-07-06
Abstract: An absorbent article of pants type comprising a front waist-opening marginal stretchable region and a front waist stretchable region having upper, intermediate and lower stretchable subregions. Their elongation stresses stand in a relationship of the front waist-opening marginal stretchable region > the lower stretchable subregion > the upper stretchable subregion > the intermediate stretchable subregion.