| Patent Number |
Title Of Patent |
Date Issued |
| RE35891 |
Process for increasing near-wellbore permeability of porous formations |
September 8, 1998 |
| A method of increasing the near-wellbore permeability of porous formation comprises exposing formation to an elevated temperature of .[.400.degree..]. .Iadd.600.degree. .Iaddend.C. or greater to cause dehydration of the clay lattices, vaporization of any blocked water, mud filtrate o |
| 6909505 |
Method and apparatus for molten material analysis by laser induced breakdown spectroscopy |
June 21, 2005 |
| An apparatus and a method are disclosed for use with Laser Induced Breakdown Spectroscopy (LIBS) systems that can be applied to the real time analysis of molten materials or liquid. Since it is difficult to prepare a surface representative of the bulk when dealing with high temperature |
| 6808679 |
MAGNESIUM-BASED CASTING ALLOYS HAVING IMPROVED ELEVATED TEMPERATURE PERFORMANCE, OXIDATION-RESIS |
October 26, 2004 |
| A magnesium-based casting alloy having good salt-spray corrosion resistance and improved creep resistance, tensile yield strength and bolt-load retention, particularly at elevated temperatures of at least 150.degree. C., is provided. The inventive alloy comprises, in weight percent, 2 to |
| 6700660 |
Method and apparatus for in-process liquid analysis by laser induced plasma spectroscopy |
March 2, 2004 |
| A method and apparatus for spectrochemical analysis of liquids, including molten materials, using laser-induced plasma spectroscopy. The apparatus preferably comprises a high power pulsed laser focused on the surface of a liquid stream flowing in a measurement cell, and an optical sp |
| 6560537 |
Prospecting technique |
May 6, 2003 |
| Disclosed herein is a technique of prospecting for deep massive sulphide ore bodies, comprising the steps of selecting a geologic region which is substantially acoustically transparent; directing seismic waves at the region and collecting reflected or diffracted waves therefrom; and |
| 6485621 |
Cathode |
November 26, 2002 |
| An improvement to a cathode used in an electrorefining or electrowinning of copper. The cathode has a solid copper head bar with a horizontal groove on its undersurface. The upper edge of a stainless steel flat sheet has several holes along its width and is vertically inserted into the g |
| 6409980 |
Process and apparatus for treating foundry sludge to recover magnesium |
June 25, 2002 |
| Process and apparatus for recovering magnesium from foundry sludge and cell bleed electrolytes includes structure and/or steps for: (i) dissolving, in a water slurry, soluble chloride compounds in the magnesium-containing material; (ii) acidifying the water slurry to between substantiall |
| 6395059 |
Situ desulfurization scrubbing process for refining blister copper |
May 28, 2002 |
| A novel process for refining high or low impurity blister copper containing S, As, Sb, Pb, Ni, Bi, Se, and/or Te to anode quality by means of a solution containing sulphates and alkali oxides is provided. More specifically, the process comprises the steps of (1) injecting air/O.sub.2 |
| 6390735 |
Apparatus and method for a yieldable tendon mine support |
May 21, 2002 |
| Apparatus, method, and a kit for a yieldable tendon mine support rock anchor include structure and/or steps including the provision of a metal support member having an outside diameter which is less than a diameter of the rock hole. Preferably, resin cartridges are disposed inside the ro |
| 6379419 |
Method and transferred arc plasma system for production of fine and ultrafine powders |
April 30, 2002 |
| The present invention is concerned with a method for the production of fine and ultrafine powders of various materials such as metals, alloys, ceramics, composites etc., through a transferred arc plasma system. The method comprises vaporizing or decomposing the material in the plasma |
| 6344295 |
Zinc alloy powder for use in rechargeable cells |
February 5, 2002 |
| Rechargeable cells employing mercury- and lead-free zinc-bismuth alloys as negative active materials are provided. Such cells demonstrate low after-cycle gassing, improved cumulative discharge capacities and initial discharge performances comparable to that of rechargeable cells that |
| 6342180 |
Magnesium-based casting alloys having improved elevated temperature properties |
January 29, 2002 |
| A magnesium-based casting alloy having improved elevated temperature properties and good salt-spray corrosion resistance. The inventive alloy comprises: 1 to 12% by wt. aluminum; 0.1 to 0.6% by wt. strontium; and 0.1 to 0.5% by wt. calcium, with the balance being magnesium except for |
| 5980854 |
Method for the production of a magnesium chloride solution |
November 9, 1999 |
| The present invention is concerned with a method for the extraction of magnesium from magnesium-containing materials such as magnesite, dolomite and silicates materials like serpentine residues, products from the amphibole or pyroxene group. The magnesium-containing material is first |
| 5804964 |
Wire rope damage index monitoring device |
September 8, 1998 |
| A magnetic testing device for obtaining a damaged index of an elongated magnetically-permeable object in real time includes a permanent magnet assembly with spaced-apart poles, a tubular pole piece adapted to surround the object, Hall effect devices placed in the magnetic flux path, a |
| 5796606 |
Process information and maintenance system for distributed control systems |
August 18, 1998 |
| A process information and maintenance system for monitoring, visualizing, triaging and maintaining all control loops of a distributed control system gives the users the number of control loops in the plant, the number of loops that are routinely in manual mode, which loops are frequently |
| 5757473 |
Optical strain sensor for the measurement of microdeformations of surfaces |
May 26, 1998 |
| An optical strain sensor for measuring microdeformations of a surface with a resolution of at least 0.2 microns. The sensor comprises at least one camera for taking photographs of areas of the surface, the photographs being separated by a known fixed distance from one another before |
| 5694730 |
Spline for joining boards |
December 9, 1997 |
| A spline for joining wood boards or panels with a groove extending throughout their longitudinal sections. The spline has a body with an upper surface and a lower surface, and central concave ridges on the at least one of upper and lower surfaces for draining water. The ridge extends |
| 5680906 |
Method for real time location of deep boreholes while drilling |
October 28, 1997 |
| The present invention is concerned with a system for the real time location of deep boreholes while drilling. The system includes a plurality of sensors sensitive to seismic vibrations disposed in an area where a borehole is to he drilled, the sensors being adapted to selectively pick |
| 5648043 |
Baffling system for uniformily cooling billet loads |
July 15, 1997 |
| The present invention is concerned with an adjustable baffling system for uniformly cooling billet loads of metal. The baffles have been design to adjust automatically to the load of billets after insertion of a car containing the billets thereon in the chamber, thus reducing the chances |
| 5620586 |
Silver electrolysis method in Moebius cells |
April 15, 1997 |
| The present invention is concerned with a method for electrorefining silver in a Moebius cell whereby the anode is completely dissolved and the gold mud is removed without handling of any partially dissolved anodes. The cell is conventional except that the anodes are placed in a basket m |
| 5592386 |
Method and apparatus for the detection of reciprocating machine faults and failures |
January 7, 1997 |
| In a method and apparatus for detection of reciprocating machine faults and failures, data representing velocity variation waveforms of a reciprocating machine having a plurality of cylinders is acquired. The acquired data is transformed using a computer to produce torque waveforms c |
| 5573739 |
Selective bismuth and antimony removal from copper electrolyte |
November 12, 1996 |
| The present invention is concerned with a process for selectively removing antimony, bismuth, or both, from acidic solution by submitting the solution to oxidizing conditions thereby causing the selective precipitation of antimony and bismuth; filtering precipitated antimony and bism |
| 5565771 |
Apparatus for increasing linear resolution of electromagnetic wire rope testing |
October 15, 1996 |
| A magnetic testing device for detecting loss of metallic area and internal and external defects in elongated magnetically-permeable objects includes a permanent magnet assembly having poles adapted to be spaced apart in the longitudinal direction of an elongated object for inducing a lon |
| 5540392 |
Optimal energy refining process for the mechanical treatment of wood fibres |
July 30, 1996 |
| The present invention is concerned with an improvement in the mechanical treatment of wood fibers, the improvement consisting in applying a large amount of energy at low intensity in the first stage of refining of the wood chips, and a small amount of energy at high intensity in the seco |
| 5539853 |
Downhole heating system with separate wiring cooling and heating chambers and gas flow therethro |
July 23, 1996 |
| An electric downhole heating system for formation heat treatment in the field of oil and gas production contains a separate wiring chamber, heating chamber, and cooling chamber, the latter being inserted between the wiring chamber and the heating chamber. The heat treatment is carried |
| 5482357 |
Plasma blasting probe assembly |
January 9, 1996 |
| The present invention is concerned with a probe assembly for plasma blasting or fragmenting a substance such as rock, concrete and the like. The probe assembly contains a probe made of two coaxial electrodes separated by a dielectric material; a termination box secured to the probe a |
| 5445791 |
Alloy for after-fabrication hot-dip galvanizing |
August 29, 1995 |
| An alloy for after-fabrication hot-dip galvanizing containing mainly Zn to which is added Bi up to the solubility limit to improve drainage of the Zn alloy. |
| 5443614 |
Direct smelting or zinc concentrates and residues |
August 22, 1995 |
| The present invention is concerned with a process for the direct smelting of zinc containing materials. The process includes volatilizing zinc from zinc-containing materials into a gas phase, while sulphur is fixed as iron sulphide in a Fe-S-O matte. Thereafter, zinc is recovered in meta |
| 5425422 |
Process for removing and preventing near-wellbore damage due to asphaltene precipitation |
June 20, 1995 |
| In accordance with the present invention, there is now provided a method for removing asphaltene deposits in a well environment such as the wellbore and near-wellbore regions, comprising the injection of deasphalted oil therein to solubilize the asphaltene deposits obstructing the we |
| 5419882 |
Method for the removal of thallium |
May 30, 1995 |
| A method for removing thallium ions from aqueous solutions uses manganese dioxide sludge produced during the electrolysis of zinc. The preferred allotropy of MnO.sub.2 is the .alpha.-form, which selectively absorbs thallium ions with minimum interference from other elements and metal ion |
| 5411648 |
Method and apparatus for on-line monitoring the quality of a purified metal sulphate solution |
May 2, 1995 |
| A method and an apparatus for on-line monitoring the quality of a purified metal sulphate solution is disclosed. The method comprises the steps of depositing metal from the purified metal sulphate solution onto a working electrode submerged in the solution by passing constant current thr |
| 5381690 |
Method and apparatus for measuring three dimensional stress in rock surrounding a borehole |
January 17, 1995 |
| A method for measuring the three dimensional stress in rock surrounding a borehole comprises the steps of cutting slots into the wall of a borehole at different angles relative to the borehole axis so as to effect stress relaxation and strain deformations which are representative of the |
| 5378328 |
Process for the electrochemical recovery of bismuth from an ion exchange eluent |
January 3, 1995 |
| A process is provided for the recovery of bismuth from an ion exchange eluent solution consisting of at least 50% sulfuric acid maintained at a temperature of 95.degree.-100.degree. C. The process comprises the step of electrowinning bismuth from the sulfuric acid solution in an elec |
| 5369087 |
Method for the rapid production of superconducting ceramic wires or ribbons |
November 29, 1994 |
| A melt-texturing method for producing high transition temperature superconducting ceramic elements of given length, such as wires of Y Ba.sub.2 Cu.sub.3 O.sub.7-.delta., which method is much faster and efficient than the existing ones. In this method, an element made of grains of sup |
| 5361845 |
Process for increasing near-wellbore permeability of porous formations |
November 8, 1994 |
| A method of increasing the near-wellbore permeability of porous formation comprises exposing formation to an elevated temperature of 400.degree. C. or greater to cause dehydration of the clay lattices, vaporization of any blocked water, mud filtrate or other fluids, and/or destruction of |
| 5332419 |
Pneumatic injection of powder or granule through submerged tuyeres |
July 26, 1994 |
| A method of injecting powdered material into converters or other metallurgical vessels equipped with at least one submerged tuyere and a gas flow line interconnecting the tuyere to a bustle pipe or other source for blowing converting gas into the tuyere comprises providing an injecti |
| 5331153 |
Gravity orientation device having an encoder and a rotatable shaft mounted in a cylindrical casi |
July 19, 1994 |
| A gravity orientation device comprises a cylindrical casing, a shaft rotatably mounted in the casing along the longitudinal axis thereof and having pointed ends contacting bearing surfaces located in the ends of the casing, an encoder mounted within the casing and having a fixed portion |
| 5324403 |
Process for salt extraction from hydrogen-sulphide scrubber solution using electrodialysis |
June 28, 1994 |
| This invention relates a method for the selective removal of alkali metal salts of sulphate (SO.sub.4.sup.2-), and thiosulphate (S.sub.2 O.sub.3.sup.2-) from hydrogen sulphide (H.sub.2 S) scrubber solutions of the liquid redox type using an electrodialysis system. In the process of t |
| 5319953 |
Friction index tester |
June 14, 1994 |
| An apparatus for measuring the basic friction angle of a surface of given material comprises a housing adapted to be held against a surface of material to be tested, a base which can slide along the inside wall of the housing, a wheel mounted on the lower part of the base and adapted to |
| 5310166 |
Self-cooling lance or tuyere |
May 10, 1994 |
| A self-cooling lance or tuyere for the conveying of gases, liquids or solids into or onto a metallurgical bath comprises a heat pipe or thermosiphon made of two tubular members adapted to be immersed in a furnace environment at one end, such tubular members defining a closed annular |
| 5302261 |
Power assisted dezincing of galvanized steel |
April 12, 1994 |
| A method of removing zinc from galvanized steel, comprises immersing the galvanized steel in a caustic electrolyte solution, electrically connecting the steel to the positive terminals of a source of direct current, and electrically connecting the negative terminals of the current so |
| 5302260 |
Galvanic dezincing of galvanized steel |
April 12, 1994 |
| A method of removing zinc from galvanized steel without substantial co-dissolution of substrate iron comprises immersing the galvanized steel in a caustic electrolyte solution, and electrically connecting the galvanized steel to a cathode material which is stable in caustic electroly |
| 5284107 |
Cable bolt monitoring device |
February 8, 1994 |
| A monitoring unit for installation on a cable bolt comprises a tube designed to fit within a cable bolt hole and having a collar at one end thereof, a cable bolt adapted to be grouted in the rock at the centre of the tube, a base plate placed tightly against the tube collar adjacent the |
| 5271909 |
Method of tellurium separation from copper electrorefining slime |
December 21, 1993 |
| A method of increasing the extraction of tellurium from copper electrorefining slime comprises leaching the slime with dilute sulphuric acid in a reactor under a partial oxygen pressure of up to 150 psi and at an elevated temperature between about 100.degree. and 200.degree. C. until |
| 5235398 |
Cavity monitoring system |
August 10, 1993 |
| A cavity monitoring system includes a supporting system adapted to be installed in an access leading to a mined stope, or any other cavity, a mast mounted on the supporting system and adapted to extend into the cavity, and a laser rangefinder mounted at the end of the mast. The laser |
| 5233730 |
Cable grip |
August 10, 1993 |
| A cable grip for improving the performance of cable bolts for ground support comprises a segmented wedge defining a cone, each segment having an inside cavity adapted to conform to a circumference of a cable and serrated grooves cut into said inside cavity to grip the cable, and a sl |
| 5217747 |
Reactive spray forming process |
June 8, 1993 |
| A reactive spray forming process comprises generating a molten spray of metal, and reacting such molten spray of metal in flight with a surrounding hot metal halide gas to form a desirable alloy, intermetallic or composite product. The molten spray of metal may be directed towards a |
| 5200042 |
Process to recover pure copper during purification of zinc sulfate solution |
April 6, 1993 |
| A process for recovery of copper from a copper residue obtained during purification of a zinc sulfate solution comprises leaching the copper residue in a concentrated sulfuric acid solution in the presence of an oxidant at a temperature of between 60.degree. and 80.degree. C. and sep |
| 5196273 |
Tantalum carbide composite materials |
March 23, 1993 |
| A tantalum carbide composite material comprises a tantalum carbide preform infiltrated with a low melting temperature metal selected from aluminum, copper, various alloys of either aluminum or copper, gold and silver. |
| 5172480 |
Borehole deviation monitor |
December 22, 1992 |
| A borehole deviation monitor comprises a probe body adapted to be lowered in a borehole and including two inclinometers mounted in an orthogonal configuration to provide simultaneous X and Y axis inclination signals indicating the dip angle of the borehole with respect to the vertical an |
