baber/WOPTO huggingface dataset:
Patent CA-1295986-C (CA)
Title: Stabilized chelating agents for removing hydrogen sulfide
Inventor: BEDELL STEPHEN A
IPC: C10K1/10
Filed: 1987-01-26
Granted: 1992-02-18
Abstract: ABSTRACT         Soluble chemical compounds having a high affinity for hydroxyl radicals are effective stabilizers for chelating agents used in the hydrogen sulfide removal process.  The stabilizers include water-soluble aromatic compounds, bromide ions, iodide ions, cyanides, nitrites, amino acids, sugars, ascorbates, alcohols, polyols, aliphatic aldehydes, soluble organic compounds having unsaturated carbon-carbon bonds, dimethyl sulfoxide, organic disulfides, alkyl amines, and formates.  The aromatic compounds have the additional benefit of combining with hydroxyl radicals to form chelating agents.
Patent CA-1336936-C (CA)
Title: Thickened liquid bleaching composition
Inventor: VIPOND PETER WILFRED
IPC: C11D7/54
Filed: 1987-02-04
Granted: 1995-09-12
Abstract: The invention provides a process for preparing a thickened liquid bleaching composition with a low initial viscosity during manufacturing and an increased final viscosity, using a hypochlorite-soluble detergent-active material and a soap, whereby the soap is partly or completely caused to be formed in situ in the composition by incorporating therein a material which generates fatty acid in the composition. Typical examples of such materials are fatty acid esters of lower alcohols.
Patent CA-1290909-C (CA)
Title: Process for chemically hardening wood and treatment solution therefor
Inventor: GORDY JOHN
IPC: B27K5/06
Filed: 1987-02-06
Granted: 1991-10-22
Abstract: Abstract of the Disclosure A pulping agent for the chemical separation of  lignin  from cellulose  in wood without  damage to either  component  is  disclosed.    The pulping  agent comprises the reaction product of (a) a loweralkanol-amine  with  (b)  a  compound produced by  electrolytic oxidation  of  the  loweralkanolamine  in  an  aqueous alkaline solution containing an acid addition salt of the  loweralkanolamine.   Also disclosed are processes utilizing such a pulping agent for chemically debarking whole logs as well as for converting soft wood into hard wood.
Patent CA-1297858-C (CA)
Title: Self erecting solar panel complex deployment system
Inventor: BINGE DEREK S
IPC: H01Q1/08
Filed: 1987-03-20
Granted: 1992-03-24
Abstract: RCA 82, 145 SELF ERECTING SOLAR PANEL COMPLEX DEPLOYMENT SYSTEM         A plurality of indexing brackets having indexing apertures are secured to a retractable boom in spaced relation.  A like plurality of indexing bulkheads are hinged to a foldable panel array (or collapsible spiral antenna) at spaced hinge axes.  The bulkheads have indexing prongs which engage the indexing apertures, the brackets pulling the bulkheads therewith as the indexing apertures and prongs engage.  Force contact spring motors urge the brackets and bulkheads together in the engaged state. Alignment guides align the brackets and bulkheads during engagement and disengagement of the indexing apertures and prongs.
Patent CA-1318529-C (CA)
Title: Contact lens for correction of color blindness
Inventor: ZELTZER HARRY I
IPC: G02C7/04
Filed: 1987-04-09
Granted: 1993-06-01
Abstract: CONTACT LENS FOR CORRECTION OF COLOR BLINDNESS     Abstract of Disclosure A corneal contact lens for the correction of color blindness, which is clear except for a thin red exterior layer covering the area admitting light to the pupil.
Patent CA-1328102-C (CA)
Inventor: DITZIG JOSEPH R
IPC: E21B4/14
Filed: 1987-05-27
Granted: 1994-03-29
Abstract: DOWN HOLE DRILL IMPROVEMENT                          ABSTRACT        A fluid impact tool is disclosed of the type commonly known as a down-the-hole drill for drilling of rock.    The improvement of the down hole drill herein described  increases  deep  hole  drill  performance  by accumulating  piston  return  air  in  a  traveling  air pocket found on the piston.  This effectively increases the piston  front  end volume  so as  to decrease  the effect  of  the  front  end  air  cushion  and  thereby increase impact.  This is particularly effective during operation with increased back pressure such as found in deep holes.
Patent CA-1285395-C (CA)
Inventor: TUMEY MICHAEL L
IPC: B24D11/00
Filed: 1987-07-15
Granted: 1991-07-02
Abstract: ABSTRACT     This invention relates to coated abrasive products, and, in particular, to coated abrasive products having a radiation-curable binder.          Radiation-curable coated abrasives heretofore known exhibit the shortcoming of poor adhesion of abrasive granules to the backing because the binder does not cure in areas where the granules screen out radiation, unless high dosages of ionizing radiation are employed.  High dosages of radiation can adversely affect the backing.  The poor adhesion of the abrasive granules results in a large loss of abrasive granules, i.e. "shelling", from the backing upon flexing and grinding.  Attempts to improve the adhesion of the abrasive granules by curing by ionizing radiation, e.g., electron beam, through the backside of the backing often leads to degradation of the backing.          This invention provides a coated abrasive product and a process for producing same.  The coated abrasive product comprises a backing, a make coat, and a size coat, and may contain an optional saturant coat, an optional presize coat, an optional backsize coat, or any combination of said optional coats, in which at least one coat is formed from a composition curable by electromagnetic radiation comprising:     (A) a curable portion containing both ethylenically unsaturated groups and 1,2-epoxide groups, which groups can be in the same compound or in different compounds, and (B) a photoinitiator portion. The photoinitiator portion activates both free-radical and cationic curing mechanisms.  The use of the radiation curable composition of this invention overcomes the problem of poor adhesion of abrasive granules resulting from incomplete cure of the binder by combining a cationic curing mechanism with a free-radical curing mechanism.
Patent CA-1298244-C (CA)
Inventor: GOULD RUSSELL J
IPC: A44B9/16
Filed: 1987-08-07
Granted: 1992-03-31
Abstract: ABSTRACT OF THE DISCLOSURE           A synthetic resin resiliently flexible separable fastener strip adapted for attachment to a substrate, is thermoplastically extruded in continuous strip form and provided with a base surface to which is applied during extrusion an adhesive in fluent state, with the extruded strip and adhesive carried thereby being then concurrently cured so that the fastener as formed and the adhesive in a dormant state on the strip can be rolled into a storage roll.  The material of the fastener strip and the material of the adhesive are selected to permit the adhesive on the strip to be reactivated when the strip is to be adhesively bonded to a substrate, without deformably affecting the fastener strip.  By extruding the strip without base webs, a plurality such as at least four, separate complementary strips can be extruded from a single die for efficiently joining sets of the profile strips into separable fastener assemblies immediately after concurrent curing of the extruded strips and the reactivatable adhesive.
Patent CA-1276458-C (CA)
Title: Display device with label mount or the like
Inventor: THALENFELD DAVID R
IPC: A47F5/08
Filed: 1987-08-24
Granted: 1990-11-20
Abstract: DISPLAY DEVICE WITH LABEL MOUNT OR THE LIKE ABSTRACT OF THE DISCLOSURE In a merchandise display hook with label holder, wherein the hook has a flat mounting plate of standard size for mounting an information label holder of variable size and shape, an improved one-piece, molded label holder is provided which has a flat, plate-like label support provided with a wand-supporting flange along its lower edge. Mounting flanges are formed on the back of the label support. These are of L-shaped cross section and are formed by side flange portions and back flange portions. The label support has through openings which are at least co-extensive in size and shape with the back flange portions, enabling the back flange portions to be formed by mold projections extending through the label support from the front side of the mold. A deflectable locking tongue secures the label holder in position on the mounting plate, once installed. The special construction of the label holder accommodates high speed, mass production molding such that a functionally superior molded label holder is economically competitive with known, extruded designs.
Patent CA-1281435-C (CA)
Title: Outer lead tape automated bonding system
Inventor: HALLOWELL DAVID L
IPC: H01L21/58
Filed: 1987-08-26
Granted: 1991-03-12
Abstract: Abstract of the Disclosure A method for aligning and bonding the outer leads of the conductive fingers of a tape-and-semiconductor-chip sub-assembly to a package substrate is disclosed.  Each section of tape is provided with an inner support ring and an outer support ring.  The conductive fingers extend from under the inner support ring to under the outer support ring.  The outer support ring is spaced away from the inner support ring to expose portions of the tape outer leads therebetween.  The tape-and-chip sub-assembly is positioned over the package substrate so the outer leads are in register with the appropriate package substrate leads.  A deposit of flux is applied to at least one location between the substrate and outer support ring to bond the sub-assembly to the substrate.          The bonded outer support ring prevents the sub-assembly from moving so the leads do not become out of register with the substrate prior to and during the lead bonding process.
Patent CA-1318064-C (CA)
Title: Methacrylic resin cast plate having excellent antistatic property and process for preparation thereof
Inventor: AZEGAMI KIYOTAKA
IPC: C08L33/12
Filed: 1987-09-04
Granted: 1993-05-18
Abstract: METHACRYLIC RESIN CAST PLATE HAVING EXCELLENT      ANTISTATIC PROPERTY AND PROCESS FOR         PREPARATION THEREOF     ABSTRACT OF THE DISCLOSURE      A methacrylic resin cast plate having an excellent antistatic property comprises (A) 100 weight parts of a polymer comprising 50 to 100 weight S of methyl methacrylate units and 0 to 50 weight % of copolymerizable monomer units and (B) 0.1 to 20 weight parts of a polymer comprising 20 to 100 weight % of units derived from a monomer having a quaternary ammonium base, which is represented by the formula (I):                                             (I) wherein R1 is H or CH3, R2 through R4 are H or (C1-9)alkyl which may have a substituent, m is from 1 to 10 and X- is an anion of a quaternizing agent, and 0 to 80 weight % of copolymerizable monomer units. The cast plate is obtained by polymerizing methyl methacrylate, a monomer mixture comprising at least 50 weight % of methyl methacrylate and up to 50 weight % of a copolymerizable monomer or a partial polymerization product thereof in the presence of the polymer (B).
Patent CA-1303837-C (CA)
Inventor: TESCH GUENTER
IPC: D04H1/00
Filed: 1988-01-11
Granted: 1992-06-23
Abstract: ABSTRACT          The present invention relates to a fiber aggregate, for a filler material for covers or pillows, a cushioning material, or filters, comprising a plurality of fiber balls bonded together by connecting binder fibers, wherein each fiber ball comprises fibers or filaments which are spherically entangled.
Patent CA-1321986-C (CA)
Inventor: SCHOENDORFER DONALD W
IPC: A61M1/02
Filed: 1988-01-12
Granted: 1993-09-07
Abstract: Abstract of the Disclosure A system for continuously separating lighter and intermediate density matter, such as plasma rich in plate-lets from whole blood moves blood through a diverging cen-trifugation gap (65) between inner and outer walls of a rotor (42) rotating about a central axis within an outer housing.  The centrifugation action creates layered flow along an intermediate section.  However by crating trail-ing wakes in the gap between the rotor (42) and housing (11), localized remixing patterns tending to move in the opposite direction are induced in the layered matter. Platelet rich plasma may then be extracted through adjacent platelet concentrate ports (58) on the inner wall of the rotor (42).  An interior passageway system passes the platelet rich plasma to a platelet concentrate reservoir (23).  Recirculation of blood in the rotor-housing gap between the output and input, and pumping action provided by the diverging centrifugation gap (65), aid in enhancing throughput and concentration levels. Prior to the centrifugation gap (65) an initial narrow gap section is employed to limit backward propagation of the induced circulatory patterns.
Patent CA-1282472-C (CA)
Title: Water sensing apparatus
Inventor: GELEZIUNAS RIMAS J
IPC: G01F23/24
Filed: 1988-02-15
Granted: 1991-04-02
Abstract: C A N A D A       INVENTOR: RIMAS J. GELEZIUNAS               TITLE: WATER SENSING APPARATUS               ABSTRACT OF THE DISCLOSURE       A water  sensing  apparatus  has  a  housing and a circuit within the housing. An alarm, eg. a piezoelectric horn,  is driven by the circuit.  An elongate sensor is secured to the housing and is connected to the circuit. The other end of the sensor is adapted for sensing the presence of  water,  to  activate  the  alarm.  The  sensor  is  both sufficiently rigid to enable it to maintain a configuration in which the  apparatus  is hung by the sensor,  and is sufficiently flexible to enable it to be bent manually to a desired configuration.
Patent CA-1327048-C (CA)
Title: Process for the synthesis of the .alpha.-(1-methylethyl)-3,4-dimethoxybenzene-acetonitrile
Inventor: CANNATA VINCENZO
IPC: C07C47/277
Filed: 1988-04-06
Granted: 1994-02-15
Abstract: Abstract of the invention New process for the synthesis of the .alpha.-(1-methylethyl)-3,4-dimethoxyacetonitrile of formula                   I   intermediate  in  the synthesis of the  drug  internationally known as verapamil.    The process starts from the isobutyryl-3,4-dimethoxybenzene of formula                        II   which, by means of the Darzens condensation, gives an epoxyester which,  by alkaline hydrolysis  and subsequent  decarboxylation, gives  the .alpha.-(1-methylethyl)-3,4-dimethoxybenzeneacetaldehyde. This  product  is reacted with hydroxylamine so obtaining  the corresponding oxime that,  by dehydratation, gives the nitrile of formula I.
Patent CA-1338770-C (CA)
Inventor: WILBUR DANIEL SCOTT
IPC: C07K16/00
Filed: 1988-04-15
Granted: 1996-12-03
Abstract: Vinyl radiohalogenated small molecules as shown in formulas I and II:              I                                   II     wherein *X is a radiohalogen, C=C is a double bonded set of sp2 hybridized carbon atoms, and substituents R1, R2, and Y are as defined below. R1 and R2 are substituents independently selected from among hydrogen; alkyl or substituted alkyl, provided that any sp2 or sp carbon atom substituted on the alkyl is separated from C=C by at least one fully substituted sp3 carbon atom; aryl or substituted aryl, provided that the aryl is bonded directly to C=C; heteroalkyl,provided, first, that no heteroatom of the heteroalkyl bonds directly to C=C and, second, that any sp2 or sp hybridized carbon bonded to a heteroatom of the heteroalkyl is not bonded directly to or otherwise conjugated with C=C and, third, that where a single sp3 carbon intervenes between C=C and an sp2 or sp carbon bonded to a heteroatom, that intervening sp3 carbon must be fully substituted; heteroaryl, provided that a heteroatom of the heteroaryl is not bonded directly with C=C; mixed alkylaryl, provided, first, that no heteroatom is bonded to C=C and, second, that either an aryl moiety of the mixed alkylaryl is directly bonded to C=C or that any aryl moiety is separated from C=C by at least one sp3 carbon atom and, where only one sp3 hybridized carbon atom intervenes between C=C and an aryl moiety, that intervening sp3 carbon must be fully substituted. Y is a substituent containing any of the groups described above for R1 and R2, except that Y cannot be hydrogen, and bearing a functional group suitable for binding to protein under conditions that preserve the biological activity of the protein. The compounds of formulas I and II can be coupled to proteins such as monoclonal antibodies to provide reagents for diagnostic and therapeutic applications. Alsometalated precursors of compounds I and II, as well as radiopharmaceutical reagent kits containing any of the subject small molecules.
Patent CA-1328428-C (CA)
Inventor: YOKOSUKA TAKEHIKO
IPC: B43K1/02
Filed: 1988-06-24
Granted: 1994-04-12
Abstract: ABSTRACT OF THE DISCLOSURE      A penpoint assembly includes a penpoint which is made of a metal plate cut off at both side edges to form a taper toward the writing tip.   A slit is provided extending from the front end of the writing tip to the vicinity of the rear end of the writing tip  along the  center  line  of  the penpoint.   The penpoint is bent at the writing tip to form small bent projections at both sides of the slit, the bent portion surrounding a small space.  An ink guide core extends                                    under the slit and communicates at the tapered portion of the ink guide core with the  slit.   A  support member supports the ink guide core and penpoint.     A  writing  instrument  includes  the  penpoint assembly, the support member being integrally formed with an ink flow regulating portion, so that ink in an  ink  storage member  in  the  rear portion of  a penholder is guided to the writing tip through the ink guide core.
Patent CA-1339478-C (CA)
Inventor: LE LOARER JEAN-LUC
IPC: C01F17/235
Filed: 1988-06-28
Granted: 1997-09-30
Abstract: A process for obtaining a ceric oxide. More precisely, a process for increasing and stabilising the specific surface of a ceric oxide at high temperature. 
<??>The process of the invention, which consists in preparing a ceric oxide by calcining a ceric hydroxide, is characterised in that the ceric hydroxide is subjected to a solvothermal treatment before the calcination operation.
Patent CA-1328129-C (CA)
Title: Data authentication using modification detection codes based on a public one-way encryption function
Inventor: BRACHTL BRUNO
IPC: H04L9/32
Filed: 1988-07-21
Granted: 1994-03-29
Abstract: DATA AUTHENTICATION USING MODIFICATION DETECTION CODES BASED ON A PUBLIC ONE WAY ENCRYPTION FUNCTION                    Abstract A cryptographic method and apparatus are disclosed which transform a message of arbitrary length into a block of fixed length (128 bits) defined modification detection code (MDC). Although there are a large number of messages which result in the same MDC, because the MDC is a many to-one function of the input, it is required that it is practically not feasible for an opponent to find them.  In analyzing the methods, a distinction is made between two types of attacks, i.e., insiders (who have access to the system) and outsiders (who do not).  The first method employs four encryption steps per DEA block and provides the higher degree of security. Coupling between the different DEA operations is provided by using the input keys also as data in two of the four encryption steps. In addition, there is cross coupling by interchanging half of the internal keys.  Although this second coupling operation does not add to security in this scheme, it is mandatory in the second method, which employs only two encryption steps per DEA block to trade off security for performance.  By providing key cross-coupling in both schemes, an identical kernel is established for both methods.  This has an implementation advantage since the first method can be achieved by applying the second method twice.  The MDC, when loaded into a secure device, authorizes one and only one data set to be authenticated by the MDC, whereas methods based on message authentication codes or digital signatures involving a public key algorithm authorize a plurality of data sets to be authenticated.  The MDC therefore provides for greater security control.
Patent CA-1310421-C (CA)
Title: High bandwidth reed-solomon encoding, decoding and error correcting circuit
Inventor: RIGGLE C MICHAEL
IPC: G06F11/10
Filed: 1988-08-23
Granted: 1992-11-17
Abstract: ABSTRACT         A pipelined error correction circuit iteratively determines syndromes, error locator and evaluator equations, and error locations and associated error values for received Reed-Solomon code words.  The circuit includes a plurality of Galois Field multiplying circuits which use a minimum number of circuit elements to generate first and second products.  Each Galois Field multiplying circuit includes a first GE multiplier which multiplies one of two input signals in each of two time intervals by a first value to produce a first product.  The circuit includes a second GF multiplier which further multiplies one of the first products by a second value to generate a second product.  The first and second products are then applied to the first GF multiplier as next input signals.  The multiplying circuit minimizes the elements required to generate two products by using a first, relatively complex multiplier for both the first and second products and then a second relatively simply multiplier to generate the second product.  This simplifies the multiplying circuit which would otherwise require two relatively complex multipliers.  The error correction circuit determines, for each received code word, an error locator equation by iteratively updating a preliminary error locator equation.  The circuit determines for a given iteration whether or not to update the preliminary error locator equation by comparing a particular variable with zero.
Patent CA-1324375-C (CA)
Title: Process for the synthesis of amikacin
Inventor: MANGIA ALBERTO
IPC: C07H15/12
Filed: 1988-11-25
Granted: 1993-11-16
Abstract: ABSTRACT          In the synthesis of amikacin, having the formula:                                             (I) by acylation of a diprotected derivative  of kanamycin A with a  reactive derivative of L-(-)-4-amino-2-hydroxybutyric acid, the  selection of  the reaction  solvent  and  of  the  pH  conditions  permit  the   industrial economicity and the synthesis yield to be improved.
Patent CA-1298252-C (CA)
Inventor: VARLET JEAN-PIERRE
IPC: F17C5/06
Filed: 1988-11-29
Granted: 1992-03-31
Abstract: A B S T R A C T      The device (102) is intended to inject a gas under pressure into an aerosol receptacle (100) through a pump or spray head crimped onto said receptacle.  The purpose of the gas is to prevent air from penetrating into the aerosol receptacle as the liquid contained therein is sprayed out.  The device is actuated by the pressure of the filling gas and it includes a damping system for ensuring uniform operation.
Patent CA-1315878-C (CA)
Title: Method of and device for recording information, record carrier, and device for reading the recorded information
Inventor: VERBOOM JOHANNES J
IPC: H03M7/14
Filed: 1988-11-30
Granted: 1993-04-06
Abstract: ABSTRACT: Method of and device for recording information, record carrier, and device for reading the recorded information.         A method of and device for recording an information signal (Vc) on a record carrier (1) are revealed. The information words of the information signal are converted into code words (200) comprising a variable number of bits of a first logic value ("1"). The number of consecutive bits of the first logic value is at least equal to P. The number of consecutive bits of the second logic value ("0") is at least Q, P being an integer greater than or equal to 1 and Q being an integer greater than P. The code words are selected in such a way that for information words of successive values the associated code words differ for only one bit. During recording an elementary mark (54) is formed on the record carrier for every bit of the first logic value Moreover a read device for the record carrier thus obtained is described. (Fig.8).