baber/WOPTO huggingface dataset:
Patent CA-2143107-A1 (CA)
Title: Enantiomerically pure .beta.-d-dioxolane-nucleosides
Inventor: CHY CHUNG K
IPC: C07D327/04
Filed: 1993-08-25
Abstract: A method and composition for the treatment of humans infected with HIV that includes the administration of an HIV treatment amount of an enantiomerically pure .beta.-D-dioxolanyl purine nucleoside of formula (I), wherein R is OH, Cl, NH2, or H, or a pharmaceutically acceptable salt or derivative of the compound, optionally in a pharmaceutically acceptable carrier or diluent.
Patent CA-2146072-A1 (CA)
Title: Production of crystals of diester phosphate monopotassium salt
Inventor: NAKAMURA MASAYUKI
IPC: C07F9/6558
Filed: 1995-03-31
Abstract: ABSTRACT OF THE DISCLOSURE     A method for producing crystals of a diester phosphate monopotassium salt, comprising (a) reacting the diester phosphate of the formula (I)            (I) with potassium hydroxide in a solvent selected from the group consisting of isopropyl alcohol, methylene chloride and chloroform and (b) allowing crystals of the diester phosphate monopotassium salt to precipitate out.  The EPC-K crystals produced by the production method of the present invention have extremely fine purity and crystal appearance.  Accordingly, the present invention is advantageous in that provision of pharmaceutical preparation superior in efficacy, safety and stability has been made possible.
Patent CA-2146981-A1 (CA)
Title: Flexible product folding and transferring apparatus and process
Inventor: SMITH DAVID A
IPC: B31B19/98
Filed: 1993-12-20
Abstract: An apparatus for clamping, folding and transferring a sack of flexible plastic bag products such as a stack of zippered plastic bags. The apparatus can be retrofitted in existing bags sealers used for producing and packaging a stack of plastic bags in order to produce novel shallower plastic bag products.
Patent CA-2151100-A1 (CA)
Inventor: COURTOIS JEAN-CLAUDE
IPC: F16F15/08
Filed: 1995-06-06
Abstract: The invention relates to a vehicle transmission including an eddy current retarder (4), the stator (5) of which is fastened to the housing (31) of a gearbox by fastener members (7) and the rotor (6) of which is connected to the gearbox outlet shaft (32)   According to the invention, the fastener members include at least two rigid parts (11, 12), one fastened to the stator and the other to the rotor, each of the two parts including a bearing surface which corresponds to at least part of a surface of revolution centered on the gearbox outlet shaft, the two bearing surfaces being separated by a layer (15) of an elastomeric material which is bonded to the two bearing surfaces and which allows a certain relative angular displacement of the two rigid parts, the two rigid parts being unmovable relative to one another in a direction parallel to the width of the air gap which separates the rotor and the stator.
Patent CA-2152550-A1 (CA)
Title: Oxidation resistant cobalt-based alloy
Inventor: CHERUVU NARAYANA SASTRY
IPC: C22C/
Filed: 1995-06-23
Abstract: A cobalt-based alloy  is provided that  exhibits superior oxidation resistance to high temperature, gas turbine operating conditions.  The cobalt-based alloy is beneficially employed as the substrate for gas turbine blades, blade rings, and  vanes.    The  cobalt-based  alloy  contains  as  major constituents the common elements of cobalt, chromium, nickel, and tungsten.  Selected minor amounts of aluminum and hafnium are incorporated into the cobalt-based alloy to improve its oxidation resistance.   Optionally,  minor amounts of such elements as tantalum and silicon can also be employed in the formulation of the alloy composition to  further  improve oxidation resistance.
Patent CA-2155047-A1 (CA)
Title: Nonionic polymers for the treatment of boiler water
Inventor: BOYETTE SCOTT M
IPC: C02F5/10
Filed: 1995-07-31
Abstract: A treatment for controlling the deposition of scale imparting spe-cies on the structural surfaces of steam generating systems, wherein the aqueous medium is maintained at a pH which minimizes magnetite solu-bility, comprising the use of a combination of an organic amine and a nonionic polymer having the structure:     wherein R1 is H or lower (C1-C4) alkyl, R2 is (CH2 - CH2 - O)n, or a mixture of both, n is an integer of from 1 to about 40, and R3 is H, lower (C1-C4) alkyl or an acetate.
Patent CA-2155306-A1 (CA)
Title: Chemical process
Inventor: BLACKER ANDREW JOHN
IPC: C07D317/70
Filed: 1994-02-16
Abstract: A process for the preparation of (1S,2R)-1,2-epoxy-1,2,3,4-tetrahydronapthalene having formula (I), which comprises the steps of (a) hydrogenating the compound of formula (III) to form cis-(1R,2S)-1,2-dihydroxy-1,2,3,4-tetrahydronaphthalene having formula (V); (b) reacting the dihydroxy compound of formula (V) with a sulphonyl halide of formula R1SO2Z wherein R1 is methyl, ethyl, trifluoromethyl, phenyl or p-tolyl, and Z is fluorine, chlorine, bromine or iodine to give a bis-sulphonyl ester of formula (X); and (c) treating the bis-sulphonyl ester (X) with an alkali metal carbonate or alkali metal hydroxyde to give the compound of formula (I). A process for preparing the enantiomeric (1R,2S)-1,2-epoxy-1,2,3,4-tetrahydronaphthalene is also claimed as are novel intermediates formed in the processes. The compounds are useful as intermediates in the preparation of biologically active compounds such as pharmaceuticals.
Patent CA-2157109-A1 (CA)
Title: Method of bleaching pulp with chlorine-free chemicals
Inventor: HENRICSON KAJ
IPC: D21C9/147
Filed: 1993-05-25
Abstract: Kraft pulp is bleached to an acceptable brightness (e.g. 86 ISO or more) without using chlorinated organic compounds, yet the strength of the produced pulp remains commercially acceptable. In the manufacture of pulp, the pulp which is cooked and oxygen delignified to a kappa number of 14 or less, and then is bleached with ozone at a medium consistency. After the ozone treatment, heavy metals are removed from the pulp, and then the pulp is led to oxygen and/or peroxide treatment, which is followed by a second ozone bleaching stage. The sequence (ZT) (EOP) (ZP) is preferred.
Patent CA-2157918-A1 (CA)
Title: Device for the extirpation of varicose veins
Inventor: CHRISTOFFERSSON ROLF
IPC: A61B/
Filed: 1994-03-14
Abstract: The invention relates to a device for the local extirpation of varicose veins to be inserted into a vein to be removed. The device (1) comprises a head part (2, 32, 52, 72, 92) comprising a main body provided with barbs (3, 33, 53, 73, 73', 93) and a guiding tip (8, 98, 78) facilitating the insertion of the device (1) into the vein, the barbs (3, 33, 53, 73, 73', 93) being oriented backwards relative to the direction of insertion of the device (1) so that the head part (2, 32, 52, 72, 92) can be inserted into said vein without being impeded by said barbs (3, 33, 53, 73, 73', 93), said barbs (3, 33, 53, 73, 73', 93) having a length and being at an angle relative to the longitudinal direction of the head part (2, 32, 52, 72, 92) in the operative position of the barbs (3, 33, 53, 73, 73', 93) which are sufficient to ensure that a vein, for which the device (1) is dimensioned, is gripped firmly by said barbs when said head is pulled out from said vein, a flexible actuating means (4, 34, 54, 74, 74', 94) being attached to said head.
Patent CA-2159503-A1 (CA)
Title: Paperboard can carrier having a handle
Inventor: FISHER MARK ANDREW
IPC: B65D71/40
Filed: 1994-04-05
Abstract: There is provided a pack having a top wall (16) and side walls (18, 19) which retain and extend around the periphery of an arrangement of cans (11). Side wall (18) is formed from a multiple thickness of paperboard and has a handle aperture (26) formed in the multiple thickness. When lifted by the handle aperture (26) the grip of the side walls (18, 19) around the cans tends to tighten thereby increasing the rigidity of the pack.
Patent CA-2162451-A1 (CA)
Title: Anti-reflective clarifier film for eyeglasses
Inventor: MURPHY JOHN P
IPC: G02B1/11
Filed: 1995-11-08
Abstract: Very thin films of liquid anti-reflection materials are applied to eyeglasses to increase effectively visual clarity and visual acuity by reducing reflection light losses, reducing internal reflections and increasing light transmission. The primary properties of the materials which are useful as anti-reflection films are characterized as non-volatile, optically clear liquids having a refractive index less than the refractive index of the optical substrate to which they are applied. Low cost, effective anti-reflection coatings are thus applied to eyeglasses and other optical surfaces, providing an improvement in the visual acuity and comfort for wearers of conventional eyeglasses.
Patent CA-2162753-A1 (CA)
Inventor: PAPADOPOULOS HARALABOS C
IPC: H04B7/26
Filed: 1995-11-14
Abstract: An  apparatus  and  method  for  reducing  co-channel interference  in  multiple-access  cellular  communication systems in which frame time or frequency slots are allocated between uplink and downlink.  An omnidirectional antenna or a set of directional antennas are used in each cell base station to communicate with users.  The frame slots in which the antennas communicate uplink and downlink information are arranged  in  accordance  with  a    predetermined  frame organization to reduce mixed co-channel interference (CCI). Mixed CCI occurs when a downlink transmission from one base station antenna in a given cell interferes with uplink reception in another base station antenna in a frequency reuse  (FR) cell.   A potentially-interfering antenna in a given  cell  is  therefore  directed to  transmit  downlink information in a different portion of the frame than that in which a potentially-interfered-with antenna in the frequency reuse cell receives uplink information.  The frame slots may be allocated such that only a portion of the available slots are dynamically allocated in accordance with user demand, while the remaining portions are assigned to either uplink or downlink communication.
Patent CA-2165532-A1 (CA)
Title: System for encoding a glass master to enable detection of a counterfeit optical cd-rom
Inventor: MITCHELL MICHAEL L
IPC: G11B19/04
Filed: 1995-12-18
Abstract: A device for enabling detection of a counterfeit optical CD-ROM is disclosed for use in a conventional mastering system. The device includes a signal source for providing a first signal for forming a predetermined defect in a glass master. The device also includes a switch for connecting a recorder of the mastering system to the signal source. In addition, the device includes a decoder for decoding encoded data and address information provided from an input source of the mastering system. Furthermore, the device includes a central processor unit which serves to detect whether a selected address from the decoded data is present. Upon detection of the selected address, the CPU controls the switch to connect the signal source to the recorder to enable the recorder to receive the first signal and form the predetermined defect at the selected address. When a CD-ROM manufactured from the glass master is played back, a desired error signal is generated at the predetermined address indicating that the CD-ROM is not counterfeit. Further, when a counterfeit CD-ROM is played back, the desired error signal is not generated at the predetermined address, thus enabling detection of the counterfeit CD-ROM. In addition, the defect is not visible to the unaided eye when the CD-ROM is viewed.
Patent CA-2166236-A1 (CA)
Title: Snap-in recessed insert for dish of burial casket
Inventor: SCHEBLER WILBUR A
IPC: A61G17/02
Filed: 1995-12-28
Abstract: A snap-in, recessed insert removably attaches to a casket lid, and a dish removably attaches to the recessed insert, to facilitate the display of different decorative interiors for the casket lid.  The recessed insert has a shape which spans the interior of the casket lid and conforms substantially in depth to the inside of the casket lid.  The insert snap connects to an internal flange of the casket lid for accurate and repeatable mounting to the lid, without requiring tools.  The insert also includes internal structure for retaining a dish inside thereof, including a center depression formed therein for positively seating the middle of the dish to the insert and the casket lid.  This recessed insert minimizes the cost and complexity associated with dish changeover and assures accuracy in mounting a dish to the casket lid.  Due to its construction, this recessed insert allows the dish components to be shipped separately and connected at the site of display, thereby eliminating an assembly step at the factory, reducing shipping costs and reducing the susceptibility of the puffing to damage during shipping.
Patent CA-2166259-A1 (CA)
Inventor: SHIRAGAKI TATSUYA
IPC: H04B10/079
Filed: 1995-12-28
Abstract: In a first node of an optical network, an OAM (operations, administration and maintenance) controller produces an electrical OAM signal to control an optical cross-connect switch. This OAM signal is converted to an optical OAM signal and optically multiplexed with an optical payload signal associated with an optical path established in the cross-connect switch, producing an optical multiplex signal which is transmitted. A second node of the network demultiplexes the transmitted signal into an optical payload signal and an optical OAM signal, the latter being converted to an electrical OAM signal and used by an OAM controller of the second node for updating the OAM information. The updated OAM information is used to control the optical cross-connect switch of the second node. The demultiplexed optical payload signal is associated with an optical path established in the cross-connect switch of the second node.
Patent CA-2176220-A1 (CA)
Title: Procede de traitement du dysfonctionnement cardiaque et compositions pharmaceutiques utilisables a cet effet
Inventor: WOODCOCK ELIZABETH ANNE
IPC: A61K31/34
Filed: 1994-11-15
Abstract: Procédé de prophylaxie et/ou de traitement du dysfonctionnement cardiaque chez un mammifère par administration d'une quantité efficace d'un agent apte à bloquer ou à inhiber l'activité ou la libération de l'inositol(1,4,5)trisphosphate dans le tissu cardiaque, et compositions pharmaceutiques utilisables à cet effet.
Patent CA-2176922-A1 (CA)
Title: Process for the preparation of tenside mixtures
Inventor: FAINGOLD SAMUIL
IPC: C09K23/00
Filed: 1993-11-17
Abstract: The object of the present invention is a process for preparing a tenside mixture according to which contains an alkali metal salt of alkyl sulfonic acid, and optionally an alkali metal salt of ethoxylated alkyl sulfate is treated with an excess of concentrated sulfuric acid so that the temperature of the mixture does not exceed aprr. 35 °C, the reaction mixture is let to separate into two layers, the layer containing organic acids is separated and neutralised with di- and/or triethanolamine in order to prepare the di and/or triethanolamine in order to prepare the di-and/or triethanolamine salts of the said acids, and optionally water and convential additional agents and adjuvents are added. The starting mixture can, according to an advantageous embodiment, contain also other tensides and additional components.
Patent CA-2177149-A1 (CA)
Title: Process for stabilising particulate alkali metal percarbonate
Inventor: HORNE GRAHAM ROBERT
IPC: C11D17/00
Filed: 1994-11-29
Abstract: The invention relates to a process for stabilising particulate alkali metal percarbonate and especially sodium percarbonate by coating it with an aqueous solution of a boric acid and a solubilising amount of an alkali metal or ammonium salt, such as in particular sodium and/or potassium chloride and/or sulphate and thereafter drying. The presence of such a neutral salt enables a greater weight of coating agent based on boric acid to be applied to the percarbonate in a given volume of aqueous solution, compared with boric acid alone.
Patent CA-2177736-A1 (CA)
Title: New ginkgolide derivatives and a process for preparing them
Inventor: CHO YONG BAIK
IPC: C07D307/93
Filed: 1994-12-30
Abstract: The present invention is directed to new ginkgolide derivatives, which may be used for the prevention or treatment of various PAFinduced diseases, and the pharmaceutical uses of theses derivatives. The present invention is also directed to a process for preparing these ginkgolide derivatives.
Patent CA-2179951-A1 (CA)
Title: Fracturing and propping a formation using a downhole slurry splitter
Inventor: JONES LLOYD G
IPC: E21B43/267
Filed: 1996-06-26
Abstract: A method and apparatus for fracturing and propping a fracture interval in which a workstring is lowered into the wellbore and a fracturing slurry comprised of a fracturing fluid and proppants is flowed down the workstring to a downhole slurry splitter which separates a portion of the fracturing fluid from the slurry and delivers it to the bottom of the fracture interval to initiate and propagate a fracture in the interval. The remaining slurry including the proppants is at the same time delivered to the top of the interval to prop the fracture as it is being formed. Alternate flowpath(s) deliver fracturing fluid and/or slurry to different levels within the interval to by-pass any sand bridges which may be formed during the fracturing operation.
Patent CA-2181311-A1 (CA)
Title: Wavy coulter
Inventor: BRUCE DOUGLAS G
IPC: A01B15/18
Filed: 1996-07-16
Abstract: A novel coulter, as well as a novel tillage tool including that novel coulter, are provided herein. The coulter includes a circular body having a peripheral edge, a centre portion, and a radius. A plurality of waves are formed in the body, each wave including a curved crest and an adjacent curved valley defining a wave width at the peripheral edge which is disposed perpendicular to the plane of the circular body. Each crest and adjacent valley extend back from the peripheral edge in respective adjacent lines which are disposed at a predetermined acute angle with respect to the radius. The coulter is rotatably attachable to an implement frame at a centre portion such that a leading peripheral edge of the coulter rotates in a downward direction as it enters soil, thereby positioning the lines of each crest and valley to enter the soil at a nearly vertical orientation, whereby compaction of the soil is minimized. The tillage tool includes an implement frame for movement in a direction of travel over soil to be tilled.  The tillage tool is provided with the above-identified soil-engaging coulter which is operably attached to the frame and is positioned forward of a no-till implement which is also operably attached to the frame.
Patent CA-2185995-A1 (CA)
Title: Method and apparatus for joining metal components
Inventor: OFFER HENRY PETER
IPC: B23K9/02
Filed: 1995-04-19
Abstract: A welding process and an apparatus used therein for providing a significant improvement in the detrimental tensile residual stress condition on the root side of welds, especially on the inside wall of piping welds. The method combines an extremely thin weld joint design with a non-circular cylindrical, thin welding electrode (10) having an elongated cross-sectional shape. During welding, the elongated dimension is aligned parallel with the length of the weld joint. This combination enables joining of piping and other residual stress sensitive components with both the initial weld joint preparation and the completed weld (6) having a uniquely thin width and with a high aspect ratio of depth to width. The electrode may also have a tungsten alloy blade (18). The blade is made from sheets of tungsten alloy by cutting or stamping. The preferred shape of the blade is an isosceles triangle. The base of the flat triangular blade is secured in a slot formed in an electrode holder (20). The electrode holder is preferably T-shaped, with the shank (20a) of the holder being connected to a conventional welding torch (14).
Patent CA-2187333-A1 (CA)
Title: Silicon nitride/silicon carbide composite powders, their preparation and densified materials prepared using the composite powders
Inventor: DUNMEAD STEPHEN D
IPC: C01B21/068
Filed: 1995-04-14
Abstract: Prepare silicon nitride-silicon carbide composite powders by carbothermal reduction of crystalline silica powder, carbon powder and, optionally, crystalline silicon nitride powder. The crystalline silicon carbide portion of the composite powders has a mean number diameter less than about 700 nanometers and contains nitrogen. The composite powders may be used to prepare sintered ceramic bodies and self-reinforced silicon nitride ceramic bodies.
Patent CA-2188496-A1 (CA)
Inventor: CONLEY CREIGHTON PIERCE
IPC: A61K9/30
Filed: 1995-04-19
Abstract: Formulation de comprimé constituant un médicament destiné à être administré oralement dans le traitement d'infections bactériennes, lequel comprimé comprend un mélange compact de 750 à 950 mg d'amoxycilline ainsi qu'une certaine quantité de clavulanate, le rapport de poids entre l'amoxycilline et le clavulanate se situant entre 6:1 et 8:1 compris, et il possède un enrobage d'un film à base de polymères, lequel peut être appliqué à l'aide de techniques d'enrobage par film aqueux.
Patent CA-2188762-A1 (CA)
Title: Low cost trigger sprayer improvement
Inventor: FOSTER DONALD D
IPC: B05B1/34
Filed: 1995-05-15
Abstract: A low cost trigger sprayer has a housing with a first liquid passage containing a spinner assembly. A pump element is positioned generally horizontally such that pulling the trigger contracts or retracts the element and releasing the trigger permits the element to return to an extended position. An elastomeric spring is positioned between the housing and pump element to improve the return characteristics of the pump element. The sprayer includes a low cost spinner assembly and low cost valving to control the flow of liquid within the sprayer. In one aspect of the invention, the housing has front and rear sections with the rear section having a saddle portion and being hinged to the front section for pivotal movement from an open position for molding the housing to a closed position for operating the sprayer. In another aspect of the invention the container has a rear portion which extends upward past the neck and defines a saddle recess with the housing connected to the neck of the container and positioned forward of the upward extending container portion.
Patent CA-2189198-A1 (CA)
Title: Floorcovering material
Inventor: BLOMKVIST STEN-AKE
IPC: C08L23/06
Filed: 1996-10-30
Abstract: A halogen-free flooring material has been discovered which is not based on polyvinyl chloride and which comprises olefin polymers in combination with organic and inorganic fillers. The flooring material generally comprises a polypropylene copolymer and homopolymer, a crosslinked ethylene polymer, organic and inorganic fillers, a flame retardant and an antistatic agent.
Patent CA-2189364-A1 (CA)
Title: Bridged cyclopentadienyl derivatives and process for their preparation
Inventor: BIAGINI PAOLO
IPC: C07C13/52
Filed: 1996-10-31
Abstract: Bridged cyclopentadienyl derivatives having general formula (I) A-X-B (I) wherein: 1) A is a monofunctional hydrocarbyl radical having general formula (II)   2) -X- is the bridge between A and B and consists of a bifunctional radical selected from an alkylene group, a silanylene group, an alkyl substituted silaalkylene group, a siloxasilanylene group;   3) B is a monofunctional hydrocarbyl radical selected from: e) any of the A radicals defined above, f) a cyclopentadienyl radical, the bridged cyclopentadienyl derivatives being used as soluble catalysts for the homo- and co-polymerization of .alpha.-olefins.