baber/WOPTO huggingface dataset:
Patent CA-2057280-C (CA)
Title: Aerator
Inventor: BURGESS HARRY L
IPC: B01F25/64
Filed: 1991-12-09
Granted: 2004-04-13
Abstract: An aerator for gasifying a body of liquid comprising a centrifugal pump having a generally vertical axis. The pump comprises a casing having a generally axial liquid inlet opening generally upwardly, a liquid outlet, and an internal fluid flow space communicating the liquid inlet and the liquid outlet. A centrifugal impeller is rotatably mounted in the space and operative to move fluid into the liquid inlet, through the space, and out the liquid outlet. A motor is operatively associated with the impeller to rotate it. The pump defines a cavitation zone in the fluid flow space adjacent a central portion of the impeller. The pump is adapted to maintain a disposition of its casing with the liquid inlet so opening generally upwardly below the surface of the liquid and capable of taking in both liquid from the body and also taking at least enough gas from an area outside the liquid to the cavitation zone so that the pump would surge if slightly more gas were taken.
Patent CA-2057303-C (CA)
Title: Phytosanitary suspo-emulsions
Inventor: FIARD JEAN-FRANCOIS
IPC: C09K23/56
Filed: 1991-12-09
Granted: 1998-11-03
Abstract: The present invention relates to novel plant-protecting suspo-emulsions. More precisely, the invention consists of a suspo-emulsion of a solid active ingredient having a melting point of 45 DEG C or above and being substantially insoluble in water, characterised in that it comprises at least one oil, one surfactant system comprising at least sugar glycerides, the said active ingredient, either a non-ionic and/or anionic surfactant or a surfactant system comprising sugar glycerides, an alkoxylated triglyceride and/or an alkoxylated fatty acid and/or a sorbitan ester and/or an alkoxylated sorbitan ester and, if appropriate, a phospholipid.
Patent CA-2057717-C (CA)
Inventor: YAMAMOTO YUSHIN
IPC: H02M7/493
Filed: 1991-12-16
Granted: 1996-09-17
Abstract: A parallel inverter system has a plurality of AC output inverters of an instantaneous voltage control type, a bus for connecting outputs of the inverters to a load so as to share the load current, a detection circuit for detecting a cross current component in a current flowing among the inverters, and an instantaneous voltage control circuit for controlling the output voltages of the inverters.  In response to a signal in accordance with the detected cross current component from the detection circuit, the voltage control circuit inserts a virtual impedance between the inverters so as to suppress cross current.
Patent CA-2062770-C (CA)
Title: Connection adapter for catheters
Inventor: CAMERON MICHAEL S
IPC: A61M39/12
Filed: 1991-01-23
Granted: 2002-04-02
Abstract: The present invention relates to an adapter for connecting a multiple lumen catheter to a corresponding number of single lumen supply tubes, which allows access for further devices such as a bronco-scope or a suction catheter. The adapter comprises; a one-piece molded multiple lumen body, each lumen of the adapter body corresponding directly to a desired connection between the multiple lumen catheter and a corresponding number of single lumen supply tubes.
Patent CA-2062816-C (CA)
Title: Method for producing novel polyester biopolymers
Inventor: PEOPLES OLIVER P
IPC: A01H5/00
Filed: 1990-07-10
Granted: 2006-09-12
Abstract: A method for controlling and modifying biopolymer synthesis by manipulation of the genetics and enzymology of synthesis of polyhydroxybutyrate (PHB) and polyhydroxyalkanoate (PHA) polyesters at the molecular level in procaryotic and eukaryotic cells, especially plants. Examples demonstrate the isolation, characterization, and expression of the genes involved in the production of PHB and PHA polymers. Genes encoding the enzymes in the PHB and PHA synthetic pathway (beta-ketothiolase, acetoacetyl-CoA reductase and PHB polymerase or PHA polymerase) from Zoogloea ramigera strain I-16-M, Alcaligenes eutrophus, Nocardia salmonicolur, and Pseudomonas oleovarans were identified or isolated and expressed in a non-PHB producing organism, E. coli. Specific modifications to the polymers include variation in the chain length of the polymers and incorporation of different monomers into the polymers to produce co-polymers with different physical properties.
Patent CA-2064689-C (CA)
Title: Stabilized protein or peptide conjugates
Inventor: NYGREN PER AKE
IPC: A61K47/48
Filed: 1990-07-31
Granted: 2002-04-30
Abstract: A process for extending the half-life in vivo by a biologically active protein or peptide, characterized by covalently coupling said protein or peptide to a polypeptide fragment capable of binding to a serum protein, whereby when administering the result-ing protein or peptide congugate its binding to the serum protein results in extended biological activity; the use of the protein or peptide conjugate above for manufacturing a medicament which, when administered to a mammal including man, shows ex-tended half-life in vivo; and a method of therapeutic or prophylactic treatment.
Patent CA-2065350-C (CA)
Title: Process and apparatus for biological reactor to purify water
Inventor: HELM GLENN J
IPC: C02F3/04
Filed: 1990-08-17
Granted: 2000-06-20
Abstract: A system and method to remove pathogenic organisms and other contaminants from sewage or other contaminated water by an inexpensive, nearly maintenance free device. Principles of operation include methods which combine suspended and fixed film biological reactor, settling chamber, physical filter and composting technology to achieve tertiary sewage treatment and equivalent treatment of contaminated water. Contaminated water flows into the apex or center (13) of a large circular, wedge or conic chamber (12), then raidally through precisely shaped layers of medium (15-20) which provide progressive treatment by reduced pore size and increased surface area as the flow proceeds to the periphery. Oxygen can be diffused into the final treatment stage by providing large surface exposure to ambient afire. The treated effluent may be disposed as normal surface run-off (22), used for irrigation and landscaping or allowed to percolate into subsurface soil without clog mat formation.
Patent CA-2066637-C (CA)
Title: Method and apparatus for recovering data, such as teletext data encoded into television signals
Inventor: WOODWARD THOMAS R
IPC: H04L7/033
Filed: 1990-09-20
Granted: 1996-12-24
Abstract: A receiver for recovering serial digital data, such as teletext, achieves an effective sampling rate which is a multiple of the local receiver clock frequency by passing the data signal through a multitap delay line. The delay line outputs are supplied to a register, and the register output which yields the lowest bit error rate is determined and used as the data sampling point. The opti-mum sampling point is determined by first ascertaining a nominal sampling point from the signal preamble and then program-matically incrementing through the available sampling points (register outputs) until there is no improvement in bit error rate
Patent CA-2070048-C (CA)
Title: Plasma arc welding adapted to id ellipsoid process
Inventor: DANKOVIC RICHARD A
IPC: B23K10/02
Filed: 1992-05-29
Granted: 1994-11-15
Abstract: ABSTRACT OF THE INVENTION      This invention pertains to the use of a plasma arc welding technique when welding a nozzle to the interior of a vessel. More specifically,  it pertains to a method and apparatus for making an inside weld when access to the interior of the vessel is restricted.
Patent CA-2072978-C (CA)
Title: Process for the heterotrophic production of products with high concentrations of omega-3 highly unsaturated fatty acids
Inventor: BARCLAY WILLIAM R
IPC: A23L13/00
Filed: 1990-11-05
Granted: 2006-10-24
Abstract: A process for the heterotrophic or predominantly heterotrophic production of whole-celled or extracted microbial products with a high concentration of omega-3 highly unsaturated fatty acids, producible in an aerobic culture under controlled conditions using biologically pure cultures of heterotrophic single-celled fungi microorganisms of the order Thraustochytriales. The harvested whole-cell microbial product can be added to processed foods as a nutritional supplement, or to fish and animal feeds to enhance the omega-3 highly unsaturated fatty acid content of products produced from these animals. The lipids containing these fatty acids can also be extracted and used in nutritional, pharmaceutical and industrial applications.
Patent CA-2080837-C (CA)
Title: Water-dispersible polyesters imparting improved water resistance properties to inks
Inventor: ADAMS LINDA J
IPC: C09D11/10
Filed: 1991-04-09
Granted: 1997-10-21
Abstract: Disclosed are water-dispersible polyesters which impart improved water resistance and block resistance properties to printing inks. Typical polyesters contain about 90 to about 97 mole % isophthalic acid, about 3 to about 10 mole % 5-sodiosulfoisophthalic acid, about 70 to about 85 mole % 1,4-cyclohexanedmethanol, and about 15 to about 30 mole % diethylene glycol, based on the total of all acid and hydroxy moiety repeating units being equal to 200 mole %.
Patent CA-2081058-C (CA)
Title: Work garment with lumbar support
Inventor: ALDRIDGE DONALD
IPC: A61F5/02
Filed: 1992-10-21
Granted: 1998-04-28
Abstract: A firefighter garment having a torso portion with a waste segment covering a lower back area of a wearer and a support member, attached to the torso portion at the waste segment, for supporting a lumbar region of the wearer. The support member preferably includes a plurality of elastic bands extended about the waste segment of the garment and having complimentary closure members positioned adjacent to the frontal area of the garment, and a contact member, attached to the elastic straps, positioned to contact the lumbar region of the wearer. In one embodiment the elastic straps are integral with the garment, preferably a pant, and in another embodiment, the support member comprises a girdle which is attachable to the firefighter pant and includes buttons for attachment to suspenders thereby performing a component of a pant suspension system.
Patent CA-2081063-C (CA)
Title: Method of making membrane-electrode assemblies for electrochemical cells and assemblies made thereby
Inventor: SWATHIRAJAN SUNDARARAJAN
IPC: C25B9/23
Filed: 1992-10-21
Granted: 1997-02-18
Abstract: There is provided a combination, unitary, membrane and electrode assembly with a solid polymer electrolyte membrane, and first and second electrodes at least partially embedded in opposed surfaces of the membrane.  The method leads to a very significant increase in catalyst utilization.  The electrodes each comprise a respective group of finely divided carbon particles, very finely divided catalytic particles supported on internal and external surfaces of the carbon particles and a proton conductive material intermingled with the catalytic and carbon particles.          A first group of finely divided carbon particles forming the first electrode has greater water attraction and water retention properties and is relatively more hydrophilic and less hydrophobic than a second group of carbon particles forming the second electrode.          In a preferred method, the membrane electrode assembly of the invention is prepared by forming a slurry of proton conductive material and at least one group of finely divided carbon particles and very finely divided catalytic particles supported on and in the carbon particles.  The slurry is applied to the opposed surfaces of the membrane; and heated while being pressed to the membrane for a time and at a temperature and compressive load sufficient to embed at least a portion of the particles into the membrane to thereby form a membrane electrode assembly.
Patent CA-2084496-C (CA)
Title: Emi internal shield apparatus and methods
Inventor: WEBER WILLIAM F
IPC: H05K7/14
Filed: 1992-12-03
Granted: 1998-11-03
Abstract: An EMI internal shield made of an electrically conductive material that absorbs and reflects electromagnetic interference (EMI) signals associates to fit with an EMI shield top cover.  The EMI internal shield is formed to fit without solder or welding as an EMI shield apparatus over EMI susceptible electronic circuitry on a printed circuit board.  The EMI internal shield apparatus not only shields circuitry from EMI sources external to the printed circuit board, but also isolates certain electronic circuits from other electronic circuitry on the printed circuit board. Additionally, the EMI internal shield permits the communication of desired electromagnetic radio frequency and electrical signals to the circuitry inside the shield.  The EMI internal shield apparatus includes the use of an electrically conductive layer that is integral to the top of the printed circuit board and which includes conductive channels that penetrate the printed circuit board.  The channels prevent EMI from passing through the printed circuit board to the shielded electronic circuits.  Also, the channels receive tangs found both on the EMI internal shield.  The tangs are positioned to prevent EMI from passing through the juncture of the EMI internal shield with the conductive layer.  As EMI signals reach the EMI internal shield, they are absorbed and conducted to an electrical ground or reflected from the EMI internal shield.  Signal trace openings through the conductive layer permit electrical leads from the electronic circuitry to connect to external circuitry.
Patent CA-2088550-C (CA)
Title: Safety needle device
Inventor: LEWANDOWSKI RAYMOND DAVID
IPC: A61M5/32
Filed: 1993-02-01
Granted: 1997-03-04
Abstract: A safety needle device includes a barrel having an inside surface defining a chamber  and an open proximal  end.   A  distal  end  includes  a  needle cannula  attached  thereto.    The  needle  cannula includes a distal tip and a lumen therethrough in fluid  communication  with  the  chamber.   A  needle guard is mounted on the barrel for movement relative to the barrel from a retracted position in which the needle guard does not materially obstruct access to the distal tip of the needle cannula and an extended position in which the needle guard obstructs access to the distal  tip.   The  safety needle device  in-cludes structure for releasably retaining the needle guard in the retracted position and for locking the needle  guard  in the extended position.   A safety indicator  is  provided  on  the  distal  end  of  the barrel for visually indicating that the needle guard is  not  in  the  locked  extended  position  and  an obscurement means  is provided on the needle guard for  obscuring  or  changing  the  appearance  of  the safety indicator when the needle guard is in the locked extended position.
Patent CA-2090575-C (CA)
Inventor: LINDSAY RICHARD D
IPC: C01F7/02
Filed: 1993-02-26
Granted: 2004-12-14
Abstract: A process for recovering free aluminum and aluminum compounds such as aluminum oxide from aluminum dross and aluminum scrap in a furnace heated with a plasma arc torch wherein air at high enthalpy is used as the arc gas. The use of air at high enthalpy as the arc gas provides for more rapid heat output, causing the outer surface or shell of dross to heat rapidly, thereby rupturing the oxide shell releasing free aluminum from within the shell. A higher aluminum recovery is obtained. In a plasma torch high enthalpy is obtained by adding a gas such as CO2, methane or hydrogen to the air arc gas at a fixed current level or by operating the plasma torch with higher current at a fixed air flow.
Patent CA-2091119-C (CA)
Title: Method and apparatus for applying a material to a web
Inventor: CUTRIGHT EDWIN L
IPC: B05C5/00
Filed: 1993-03-05
Granted: 2004-12-21
Abstract: This invention relates to the treatment of paper with material in repetitive patterns. The treatment patterns made with this invention can be altered by changing apparatus operating parameters,
Patent CA-2094300-C (CA)
Title: Steroid derivatives for the treatment of prostatic hypertrophy, their preparation and uses
Inventor: KOJIMA KOICHI
IPC: C07J1/00
Filed: 1993-04-19
Granted: 2003-01-28
Abstract: Compounds of formula (I): (see formula I) [wherein: R1 is hydrogen, alkyl, aryl-substituted alkyl or aromatic heterocyclic-substituted alkyl; R2 is: aryl-substituted alkyl, aromatic heterocyclic-substituted alkyl or diarylamino; and R3 is carboxy or a group of formula -CONHSO2R4 wherein R4 is alkyl]; and pharmaceutically acceptable salts and esters thereof have valuable 5.alpha.-reductase inhibitory activity and can thus be used for the treatment and prophylaxis of, inter alia, prostatic hypertrophy as well as other disorders arising from excess levels of 5.alpha.-dihydro-testosterone.
Patent CA-2096463-C (CA)
Title: Mailing system moistener apparatus with recirculating excess moistening fluid
Inventor: HOLBROOK RUSSELL W
IPC: B43M5/04
Filed: 1993-05-18
Granted: 1998-09-15
Abstract: A moistening apparatus includes a moistening fluid supply means.  A moistening means is connected to the moistening fluid supply means for applying the moistening fluid onto the glue line of an envelope flap or onto the glue area of a postage meter or parcel register tape. Excess moistening fluid collection means are positioned with respect to the moistening means such that excess moistening fluid collects in the excess moistening fluid collection means. The collected excess moistening fluid from the excess moistening fluid collection means is moved to the moistening fluid supply means.  This recirculates excess moistening fluid back to the moistening fluid supply means.
Patent CA-2098070-C (CA)
Inventor: MOLISON ROBERT E
IPC: B65B27/12
Filed: 1993-06-09
Granted: 1996-12-10
Abstract: A package assembly machine and method for continuously placing articles in open hollow containers to form packages.  A transport unit mounted on an endless conveyor moves an article from a pick up station to a package assembly station where the article is placed in an inverted hollow container to form the package.  The package is moved by the transport unit along the endless conveyor and turned upside down.   As the package is turned,  a hook-shaped circumferential lip on the container engages the lip of a support plate of the transport unit and supports the package.  The right side up package is carried to a takeaway station and placed on a discharge conveyor for movement to a sealing machine.
Patent CA-2101689-C (CA)
Inventor: REMPEL GARRY LLEWELLYN
IPC: C08F8/04
Filed: 1993-07-30
Granted: 2004-01-27
Abstract: An improved process is provided for the catalytic hydrogenation of nitrile rubber using a ruthenium catalyst wherein the improvement is that the nitrile rubber is provided as an aqueous emulsion and a solvent and a selected inorganic additive are present during the hydrogenation, whereby the molecular weight increase in the hydrogenation process is minimized and controlled.
Patent CA-2105160-C (CA)
Title: Toothbrush having handle joined to brush head by non-pinching flexible twin beam structure
Inventor: DIRKSING ROBERT STANLEY
IPC: A46B5/00
Filed: 1992-01-30
Granted: 1995-08-01
Abstract: A toothbrush (1) employing a non-pinching resilient twin beam structure (10) to connect the brush handle to the brush head, the twin beam structure having one beam (11) which is wider in cross-sectional width than the other beam (12) in order to prevent soft oral tissue from entering the opening (O) formed between the beams and being pinched between by the interior sur-faces of the beams during deformation of the twin beam structure.
Patent CA-2107290-C (CA)
Inventor: HIROTA MINORU
IPC: B29C65/08
Filed: 1993-09-29
Granted: 1996-11-26
Abstract: An end stop of synthetic resin having a pair of groove portions clamping and fused to an attachment core of at least one of a pair of fastener tapes, wherein each of the groove portions has at least one projection fusible to the attachment core and directed radially inwardly and situated remotely from opposite ends of each groove portion.
Patent CA-2108388-C (CA)
Inventor: INNES FRANK A S
IPC: E21B47/18
Filed: 1993-10-14
Granted: 2003-12-16
Abstract: A downhole tool (100) for generating pressure pulses in a drilling fluid comprising an elongate body (107, 127) and a plurality of blades (116) spaced around the body.      The blades are each divided into an independent front section (116a) and rear section (116b), forming a set of front sections and a set of rear sections, at least one of the set of front sections and the set of rear sections being mounted for rotation and being angularly displaceable relative to each other between a first position in which the sections are aligned and a second position in which the rear sections obstruct fluid flow between the front sections to generate a pressure pulse. The tool includes a first set of driving blades in front of the blades (116) for generating a torque on the blade sections, the driving blades being curved in a first direction, and an escapement means (129) which is radially movable to permit stepwise rotation of the blade sections, and thus to move the blade sections between the first and second positions. The tool additionally comprises a set of stator blades (162) positioned in front of the set of front sections. The stator blades are curved in a second direction opposite to the first direction.
Patent CA-2112303-C (CA)
Title: Copolyamides with long-chain polyamide units
Inventor: TORRE HANS DALLA
IPC: C08G69/36
Filed: 1993-12-23
Granted: 1999-03-30
Abstract: A copolyamide composition having long-chain monomers of 9 to 12 carbon atoms as long-chain building blocks, and second  monomers.          The second monomers comprise a diamine of the formula wherein R  is  a  radical  of  certain aliphatics,  araliphatics, cycloaliphatics, or mixtures thereof. The diamine is reacted with an aromatic dicarboxylic acid, a portion of which may be replaced by an aliphatic dicarboxylic acid. Molded shapes made from the copolyamides are also disclosed.
Patent CA-2114242-C (CA)
Inventor: JOSEPH ANTHONY L P
IPC: F24C15/32
Filed: 1994-01-25
Granted: 1998-09-15
Abstract: A range for sealed combustion of a gaseous fuel has  a  hob  assembly  and  an  oven.    The  hob  assembly comprises a glass ceramic cooking surface sealed to a support box and one or more burners.  The hob assembly and oven are connected to a fresh air intake/exhaust manifold, such that there is no air exchange between the range and the room in which it is located.   Narrow heat transfer passageways are defined between the cooking surface and an internal surface around each burner.
Patent CA-2117218-C (CA)
Title: Polymeric ophthalmic lens prepared from unsaturated polyoxyethylene monomers
Inventor: MOLOCK FRANK F
IPC: C08F290/06
Filed: 1994-03-08
Granted: 2005-07-12
Abstract: A soft hydrogel contact lens, is disclosed. The lens is derived from a crosslinked polymer comprising the reaction product of a monomer mixture comprising: (A) a monounsaturated polyoxyethylene monomer; (B) a diunsaturated polyoxyethylene monomer of relatively high molecular weight; (C) a diunsaturated polyoxyethylene monomer of relatively low molecular weight; and (D) a hydrophilic monomer selected from the group consisting of hydroxyethyl methacrylate, methacrylic acid, N,N-dimethyl-acrylamide, N-vinyl pyrrolidone, glycerol monomethacrylate, itaconic acid, and mixtures thereof.
Patent CA-2120020-C (CA)
Title: Air treatment plant for foodstuff comprising a trough with an adjustable width
Inventor: ROTHSTEIN SVEN-OLLE
IPC: A23L3/00
Filed: 1992-10-02
Granted: 2003-06-10
Abstract: An air treatment plant, e.g. a freezing plant, for foodstuffs, comprises a housing (I), an elongate trough (I I) provided therein for receiving the foodstuff to be treated, a heat exchanger (12) and a fan assembly (13) for producing an air flow circulat-ing through the heat exchanger, up through the trough and back to the heat exchanger. One side wall ( 17) of the trough ( 1 I ) is adjustable sideways for changing the width of the trough. The air flow capacity of the fun assembly ( 13) is adjustable, preferably depending on the width of the trough (11).