baber/WOPTO huggingface dataset:
Patent CA-2240753-A1 (CA)
Title: A method to provide information concerning a frequency band, a head-end and a terminal realizing such a method and a communication access network including such a head-end and such a terminal
Inventor: WOLTERS ROBERT PETER CHRISTINA
IPC: H04N7/173
Filed: 1998-07-09
Abstract: A method to provide information in a communication access network which includes a plurality of terminals (T11, T12, T13, ..., T31, ...) and a head-end (HE). The head-end (HE) includes a plurality of transceivers (TRX1, TRX2, TRX3, ...) and is downstream coupled to each one of the plurality of terminals (T11, T12, T13, ..., T31, ...) via a downstream common link (Lc) and a tree-likedistributive network. Each transceiver (TRX1) provides a downstream signal (Sd1)in a frequency band (CH1) to a combiner (COMB) which combines the different downstream signals into a downstream modulated signal (S-MOD) which is broadcasted to the different terminals. A first one (T12) of the terminals is upstream coupled to a first one (TRX1) of the transceivers via an upstream link (Lu12). The information is provided to the first terminal (T12) and concerns a filter frequency band (CH1) which must be used by the first terminal (T12) to filter out of the modulated signal (S-MOD) a regenerated downstream signal which is associated to a first one (Sd1) of the downstream signals provided by the first transceiver (TRX1). The method includes: a) distributing by the head-end (HE) initialisation packets (Tx-TRX1, Ty-TRX2, Tz-TRX3, ...) which includes a reference (Tz) and which is associated to one of the transceivers (TRX3) and which is included in one (Sd3) of the downstream signals; and b) filtering out of the downstream modulated (S-MOD) signal by the first terminal (T12) with one of the plurality of frequency bands (CH3) a regenerated downstream signal (Sdr3); and c) upstream transmitting by the first terminal (T12) a confirmation signal which includes the reference (Tz) of that one initialization packet and an identification of the first terminal (T12); and d) in the event that the transceiver (TRX3) associated to the reference (Tz) not corresponds to the first transceiver (TRX1) distributing by the head-end (HE) a change request by including the change request in the downstream signal (Sd3) provided by the transceiver (TRX3) which is associated to the reference (Tz), the change request includes the identification of the first terminal (T12) and the first frequency band (CH1) associated to the first transceiver (TRX1).
Patent CA-2243535-A1 (CA)
Title: Nouveaux polymeres associatifs et leur procede de preparation par polymerisation en emulsion inverse
Inventor: CORPART JEAN-MARC
IPC: C08F20/02
Filed: 1998-08-13
Abstract: Des nouveaux polymères associatifs acryliques ont été préparés par polymérisation radicalaire en émulsion inverse. Ces polymères renferment un monomère acrylique spécial. Il s'agit d'un ester méthacrylique dont le radical est constitué d'un segment hydrophile et d'un segment hydrophobe. Les polymères associatifs de l'invention peuvent être utilisés comme épaississants, agents de floculation ou agents de rétention de charges.
Patent CA-2243768-A1 (CA)
Title: Refrigeration system with improved liquid sub-cooling
Inventor: GREGORY CHARLES
IPC: F25B43/00
Filed: 1998-07-22
Abstract: A refrigeration system has a compressor operable to supply relatively hot compressed refrigerant gas, a condenser to liquify the relatively hot compressed refrigerant gas from the compressor, a thermostatic expansion (TX) valve to vaporize liquified refrigerant from the condenser, an evaporator to cool the surrounding atmosphere by vaporized refrigerant from the TX valve, a superheat sensor to improve control of the TX valve, a compressor discharge line to convey relatively hot compressed refrigerant gas from the compressor to the condenser, a liquid line to convey liquified refrigerant from the condenser to the TX valve, and a suction line including the superheat sensor to convey vaporized refrigerant from the evaporator to the compressor. A liquid refrigerant stabilizer in the liquid line and the suction line is operable to convey liquid refrigerant in the liquid line and vaporized refrigerant in the suction line in heat exchange relationship with each other to cause liquid refrigerant in the liquid line to be cooled by suction refrigerant in the suction line. A de-frost valve assembly is operable to effect de-frosting by shutting off flow of liquid refrigerant from the condenser and substituting a flow of relatively hot compressed refrigerant gas from the compressor to cause the relatively hot compressed refrigerant gas to flow in the liquid line through the stabilizer to the TX valve and the evaporator to defrost the evaporator and return through the suction line through the stabilizer to the compressor. The stabilizer functions as a vaporizer during a de-frost cycle with the relatively hot compressed refrigerant gas in the stabilizer-vaporizer being in heat exchange relationship with vapour in the suction line passing from the evaporator through the stabilizer-vaporizer to the compressor.
Patent CA-2243902-A1 (CA)
Title: Merchandiser with shroud and header forming panels
Inventor: BRUSH JOHN
IPC: A47F5/11
Filed: 1998-07-23
Abstract: A merchandiser has at least one panel which is foldable secured atop the merchandiser. This panel is foldable between a first shroud forming position extending downwardly over a side face of the merchandiser and a second header forming position extending upwardly from the shroud forming position.
Patent CA-2244115-A1 (CA)
Title: Method of plasmid dna production and purification
Inventor: HITCHCOCK ANTONY GORDON
IPC: C12N15/00
Filed: 1997-02-12
Abstract: A scalable method for the production of highly purified plasmid DNA in Escherichia coli is described, which method includes growing plasmid-containing cells to a high biomass in exponential growth and lysing the cells by raising the pH of the culture to a carefully controlled pH  value in which chromosomal DNA is denatured but plasmid DNA  is reversibly renatured. The method has been developed for the production of pharmaceutical grade DNA for use in in vivo and ex vivo gene therapy.
Patent CA-2244456-A1 (CA)
Title: Connection pin assembly
Inventor: BRINKLEY DAVID WAYNE
IPC: E02F9/28
Filed: 1998-08-04
Abstract: A connection pin assembly for attaching a replaceable implement (10) to an earthworking bucket nose (12) includes a spool (24) and a wedge (33) having respective ramping surfaces (36,48) which convert relative axial movement into lateral expansion of the assembly. A screw member (38) is located in a recess (34) in the spool's ramping surface, a thread segment of the screw member engaging formations (44) on the wedge to drive the axial movement.
Patent CA-2248094-A1 (CA)
Title: Method and apparatus to cool food contact machines and surfaces
Inventor: HALL RENEE M
IPC: F25B21/02
Filed: 1998-01-06
Abstract: A cooling and refrigeration apparatus cools one or more surfaces of one or more food handling devices, such as meat cutting machines, scales, and food preparation areas, so as to inhibit bacterial and other microbial growth thereon. The apparatus includes one or more coolers to lower the temperature of the food contact surfaces to a predetermined temperature which inhibits bacteria and other microbial growth thereon, by providing one or more surfaces at the predetermined temperature adjacent to or at the one or more food handling surfaces. The cooler includes a distributor system of conduit passageways and other distribution devices to distribute one or more cooling media to conductive surfaces of the one or more food handling devices.
Patent CA-2248692-A1 (CA)
Inventor: INSPEKTOR AHARON
IPC: C23C30/00
Filed: 1997-01-15
Abstract: A cutting tool includes a substrate (28) and a coating on the substrate (28).  The coating includes a base adhesion layer (38) that is on at least a portion of the substrate (28). A first intermediate adhesion layer (40), which includes boron and a first element, that is on the base adhesion layer (38). A  second intermediate adhesion layer (42), which includes boron, the first element, and nitrogen, that is on the first intermediate adhesion layer (40).  An outer adhesion layer (44), which includes boron and nitrogen preferably in the form of cubic boron nitride, that is on the second intermediate adhesion layer (42). A wear coating scheme (34) wherein the innermost layer of the wear coating scheme (34) is on the outer adhesion layer (44).
Patent CA-2252229-A1 (CA)
Inventor: YAMANE TAMAE
IPC: C07D401/04
Filed: 1997-04-17
Abstract: A novel pyridonecarboxylic acid derivative or its salt exhibiting satisfactory antibacterial activities, intestinal absorption, metabolic stability, and reduced side effects, in particular, phototoxicity and cytotoxicity, as well as an antibacterial agent containing such pyridonecarboxylic acid derivative or its salt are provided.      For such an object, a pyridonecarboxylic acid derivative represented by the following formula (1):   (see formula) (wherein R1 represents hydrogen atom, a halogen atom or a lower alkyl group; R2 represents hydrogen atom or a lower alkyl group; R3 represents substituted or unsubstituted amino group or hydroxyl group; and R4 represents hydrogen atom, a lower alkyl group, amino group or nitro group) or its salt is provided.
Patent CA-2252247-A1 (CA)
Title: Synergistic herbicidal combinations comprising r-imidazolinone compounds
Inventor: GUERINO JOSEPH JR
IPC: A01N43/50
Filed: 1998-10-29
Abstract: There is provided a method for enhancing the control of monocotyledenous and dicotyledenous plant species comprising applying to said plant species a combination of optically active R-imidazolinone compounds. Also provided is a herbicidal composition comprising a combination of R-imidazolinone compounds.
Patent CA-2254700-A1 (CA)
Title: Laser clad pot roll sleeves for galvanizing baths
Inventor: FUKUBAYASHI HAROLD HARUHISA
IPC: C23C26/00
Filed: 1998-11-25
Abstract: A wear resistant coating for journals, journal sleeves and bushings on submerged rolls in a molten metal coating bath, comprising a laser-melted tungsten carbide containing overlay.
Patent CA-2257057-A1 (CA)
Inventor: PARKER CARLETON J III
IPC: C11D11/00
Filed: 1998-12-22
Abstract: In fabric laundry procedures, commercial and household laundry detergent compositions commonly contain an optical brightener composition. Brighteners adjust the optical properties of the fabric in such a way that the fabric appears to be white even after repeated washings. Often white fabrics can yellow during use. Fluorescent optical brighteners having an optical blue aspect, mask the yellowing of the fabric. Common laundry detergents fail to have sufficient brightening capacity to brighten heavily soiled white cotton items used in household, commercial, institutional or fast-food food surface. A process for improving the whiteness of soiled white cotton, preferably terry cloth, items involves contacting the soiled white fabric item with a presoak containing an effective proportion of a fluorescent optical brightener composition, removing the item from the presoak and separating the presoak composition from the fabric item producing an extracted item. The extracted item is then laundered in a laundry detergent composition containing a brightener. The resulting white fabric items have substantially improved whiteness when compared to similarly soiled items laundered in conventional processes.
Patent CA-2258966-A1 (CA)
Title: High pressure transluminal fluid delivery device
Inventor: SPEARS J RICHARD
IPC: A61M25/09
Filed: 1997-06-19
Abstract: The present invention includes a fluid delivery device (100) capable of delivering perfusion or other fluids to a vascular site. Preferred embodiments permit delivery of large quantities of fluid without causing recoil of the device, and without causing trauma to the vascular site.
Patent CA-2259228-A1 (CA)
Title: Adenoviral mediated gene transfer in adipocytes and related implants
Inventor: ROSENGART TODD
IPC: A61K35/12
Filed: 1997-06-26
Abstract: The present invention provides gene transfer to adipocytes mediated by adenovirus and, in particular, transfer of toxic genes as a means of reducing adiposity and transfer of genes encoding angiogenic substances to induce new blood vessel growth, as well as adipose tissue implants.
Patent CA-2261824-A1 (CA)
Inventor: VAN NEE D J RICHARD
IPC: H04J13/10
Filed: 1999-02-15
Abstract: Un système de (dé)modulation numérique utilise un plus grand ensemble de codes de M codes pour des codes de longueur N, où M> N, pour fournir un taux accru de données tout en maintenant le gain de codage. Par exemple, le système peut utiliser 16 codes différents, chacun ayant une longueur de 11 puces dans un jeu de codes, tandis que les systèmes conventionnels de saisie M-aires utilisent une taille de jeu de codes de 8 pour des codes à 11 puces ou des codes à 8 puces. En étendant la taille du jeu de code, le système augmente le débit de données du système. Avec 16 codes et la capacité de changer le signe du code à transmettre, le système permet de coder 5 bits de données à la fois sur I et Q, soit un total de 10 bits de données peut être codé par symbole de code. Dans ce mode de réalisation, un symbole de code contient un code de 11 puces sur une branche de modulation I et un code de 11 puces sur une branche de modulation Q. En tant que tel, en utilisant 11 codes de puce et un débit de puce de 11 Mhz, le système offre un débit de données de 10 Mbps tandis que les systèmes classiques de saisie M-aires ne peuvent atteindre que 8 Mbps en utilisant la même longueur du code et le même débit de puce. En étendant la longueur de code, le gain de traitement est augmenté. Le jeu de codes étendu n'est pas orthogonal, de sorte qu'une valeur de corrélation croisée non nulle est obtenue en résultat entre les différents codes de l'ensemble de codes. Cependant, la dégradation des performances du bruit obtenu en résultat et des trajets multiples peut être réduite par le choix des jeux de codes ayant de petites valeurs de corrélation croisée (presque orthogonales). Les amplitudes des deux valeurs de corrélation croisée et des lobes latéraux d'auto-corrélation doivent de préférence être inférieures à la moitié d'une longueur de code. Dans certains modes de réalisation, l'ensemble de codes est dérivé de codes orthogonaux qui sont modifiés pour réduire les lobes secondaires d'auto-corrélation associés aux codes orthogonaux. Dans d'autres modes de réalisation, le jeu de codes est dérivé en utilisant un code complémentaire qui fournit des lobes latéraux d'auto-corrélation bas et est modifié pour réduire les valeurs de corrélation croisée entre les codes.
Patent CA-2262226-A1 (CA)
Title: Aerosol dispenser
Inventor: SINGH JASWINDER
IPC: B65D83/16
Filed: 1999-02-15
Abstract: An aerosol dispenser includes a housing adapted to accommodate an aerosol container. A spray mechanism communicates with the aerosol container and is actuable to dispense an aerosol spray of material from the aerosol container. A controller actuates the spray mechanism to effect dispensing of the aerosol material.  A remote unit is provided to establish a wireless communication link with the controller.
Patent CA-2263157-A1 (CA)
Title: Enclosing a small-format electrical device
Inventor: CENTOFANTE CHARLES A
IPC: H01R12/72
Filed: 1997-08-08
Abstract: An injection molded plastic housing for, and method of enclosing, an electrical device including placing the device between a housing including a lid member (10) and a base member (20) and joining the lid member and the base member to each other and to a connector (30) attached to the enclosed device.  The lid member, base member and connector each may include a mean for mating (15, 25) to promote their joining to form an assembled plastic housing with increased structural integrity. The lid member (10) and base member (20) join with the connector (30) in a substantially overlapping relationship that results in a rigid and aesthetically pleasing housing which complies with standards for PC card style devices set by, for example, CFA, PCMCIA, JEDIC, ISO, etc. The inexpensive injection molded plastic material of the housing and the limited number of parts provides for an easily automated, economical method of enclosing electrical devices for use, for example, in computer peripheral and memory applications.
Patent CA-2263758-A1 (CA)
Inventor: WHITE THEODORE BAXTER
IPC: F04D29/18
Filed: 1997-09-16
Abstract: An impeller pump for moving large volumes of liquid against heads of up to 1 meter is formed by a substantial circular housing having its axis substantially vertical in which an impeller is mounted for rotation on the central axis. The impeller has a maximum diameter substantially equal to the inside diameter of the housing and is formed with a hub and the plurality of blades symmetrically positioned around the hub. Each blade extends radially outward of the hub from a root to a tip and has a foil shaped cross section with a lift to drag ratio at least 75 to 1 at a Reynolds number of under 106. Each of the blades is skewed rearward in the direction of blade rotation so that the apparent aspect ratio of blade is increased and to reduce operating noise.  Each blade has an angle of attack of between 2 and 6° has a rake in the direction of flow through the impeller of between 3 and 7°. The impeller lifts water through the housing and directs it into the fish farm.
Patent CA-2266702-A1 (CA)
Title: Broadcast systems with wireless request channel
Inventor: DANIEL RAY A
IPC: H04B7/185
Filed: 1997-10-23
Abstract: An information broadband broadcast system selected from cable and satellite for broadcasting requested information from a selected information source, including the Internet (17), to one or more selected subscriber stations (10) includes an independent backhaul channel for communicating information request signals from a subscriber station to one or more central processing stations.  The system includes a data broadcast station for transmitting requested data from the selected data source and central station via the data broadcast station to the one or more selected subscriber stations. The high-data rate broadcast station forwards requested data from a data source to the data broadcast station. A backhaul satellite (14) communication system, independent of the broadband broadcast system, has a backhaul satellite ground terminal (16) for coupling information request signals from backhaul satellite communication system to high data broadcast station terminal (19). Each subscriber station has a broadband broadcast receiver (21).
Patent CA-2272468-A1 (CA)
Inventor: WANG JAMES P
IPC: F21V15/00
Filed: 1999-05-20
Abstract: A sheet metal housing for an HID luminaire which comprises a two piece, fold-up sheet metal housing which provides exceptional strength with minimal usage of materials to support a very heavy ballast therein. The sheet metal housing is suitable for a low cost highbay luminaire with high watt ballasts for Metal Halide and High Pressure Sodium, Mercury Vapor (HID) light sources. The sheet metal housing provides reflector adjustability for different size lamps and light centers. A top sheet metal stamping defines a central ballast shelf on which a ballast is mounted, and first and second ends of the top stamping are bent 90° on opposite sides of the central ballast shelf. The first and second ends of the top stamping are further bent back 180° upon themselves to form a double wall. The first and second ends of the top stamping are further bent 90° to project towards each other. The very ends of the first and second ends of the top stamping are further bent and interconnected to form a three wall top hanging system, and to form a top sheet metal housing.      First and second ends of a bottom sheet metal stamping are bent 90° about a central section to form a bottom sheet metal housing. The top and bottom sheet metal housings are secured together to form an assembled housing for the luminaire in a rigid monocoque design.
Patent CA-2273293-A1 (CA)
Inventor: VITEBSKIY STANISLAV
IPC: H04B1/707
Filed: 1999-05-31
Abstract: Bursts of additional bandwidth (e.g., one or more supplemental channels or a channel having variable bandwidth) is assigned to users (e.g., high-speed data users) in a cellular telecommunication system. A request for assignment of additional bandwidth may be an initial request, a continuation request for an on-going burst, or a retry requests after a previously rejected request. In any case, it is determined whether to grant or reject the request. If the request is rejected, instructions are given to submit a retry request after a specified back-off time. The present invention may be implemented using either an asynchronous approach or a synchronous approach. According to the asynchronous approach, all requests are handled asynchronously. According to the synchronous approach, initial requests are handled asynchronously, but continuation requests and retry requests are handled synchronously at epoch times that coincide with specific time slots.
Patent CA-2273624-A1 (CA)
Title: Black edible flat film based on collagen and foodstuff comprising said film
Inventor: PEIFFER BERND
IPC: A23L29/281
Filed: 1999-06-04
Abstract: A black edible flat film based on collagen with a wall thickness of up to 40 microns that comprises (a) a collagen substrate, and (b) at least one black pigment and the concentration of said pigment is between 2% and 40% by weight based on dry collagen in order to meet the requirements of suppleness and non-transparency. These films are useful in the manufacture of foodstuffs having a black outer coating.
Patent CA-2275211-A1 (CA)
Title: Secure interactive electronic account statement delivery system
Inventor: POWAR WILLIAM L
IPC: G06Q20/10
Filed: 1997-12-12
Abstract: The present invention consists of a secure interactive electronic account statement delivery system suitable for use over open networks such as the Internet. The invention utilizes a certification hierarchy to insure that electronic bills, invoices, and other account statements can be securely sent over open networks. The participants in the system are a certification authority, certificated banks, billers, and customers. The certification authority grants digital certificates to the certificated banks, which in turn grant digital certificates to billers and customers. Digital certificates form the basis for encryption and authentication of network communications, using public and private keys. The certificates associate a customer and biller with a certificated bank and with the electronic billing system, much like payment cards associate a customer with a payment card issuer and a particular payment card system.
Patent CA-2277397-A1 (CA)
Title: Method and apparatus for safeguarding fuel cells against reverse polarization damage
Inventor: MOWERY KENNETH DAVID
IPC: B60L11/18
Filed: 1999-07-15
Abstract: The present invention is directed to method and apparatus for monitoring the performance of a fuel cell stack in such a manner as to be able to safeguard failing cells therein against damage by detecting when undesirable operating conditions exist that portend major future stack difficulties that could result in polarity reversal of the cell. The invention uses optoisolators to monitor voltage across pairs of cells in a stack and alert an operator and/or initiate corrective action when an abnormal condition exists that leads to a drop in such voltage below the activation voltage of the photoemitter in the optoisolator. The photoemitter is coupled with a photo-detector which is series-connected to a plurality of other photo-detectors in a string. A constant current is caused to flow in the string when all the photoemitters are lit and the photo-detectors closed. Failure of one or more cells causes its associated photoemitter to extinguish and its associated photo-detector to open and interrupt the current flow in the string. When the current flow in the string ceases a signal is generated that alerts the operator and/or initiates action to safeguard the failed cell that caused the photoemitter to extinguish.