Famous Patents
In 1608, Dutch eyeglass maker Hans Lipperhey filed the first patent for a working telescope. The patent was denied.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7470356 | Wireless monitoring of two or more electrolytic cells using one monitoring device A system, device, and method include a cell-powered first electronic device for monitoring two or more electrolytic cells is powered using electrical potential imposed across the electrolytic cells. The potential is voltage-boosted to accomplish this task. If the el... | 12/30/2008 |
| 7384533 | Electrolytic processes with reduced cell voltage and gas formation Electrolytic solutions containing organic additive(s) selected from a described class of additives (e.g., 4,6-dihydroxypyrimidine) reduce overall applied electrical potential of electrolytic cells and/or reduce gas formation at the anode(s) or increase copper produc... | 06/10/2008 |
| 7378011 | Method and apparatus for electrowinning copper using the ferrous/ferric anode reaction The present invention relates, generally, to a method and apparatus for electrowinning metals, and more particularly to a method and apparatus for copper electrowinning using the ferrous/ferric anode reaction. In general, the use of a flow-through anode—coupled wi... | 05/27/2008 |
| 7378010 | System and method for producing copper powder by electrowinning in a flow-through electrowinning cell This invention relates to a system and method for producing a metal powder product using conventional electrowinning chemistry (i.e., oxygen evolution at an anode) in a flow-through electrowinning cell. The present invention enables the production of high quality me... | 05/27/2008 |
| 7368049 | Method and apparatus for electrowinning copper using the ferrous/ferric anode reaction and a flow-through anode The present invention relates, generally, to a method and apparatus for electrowinning metals, and more particularly to a method and apparatus for copper electrowinning using the ferrous/ferric anode reaction and a flow-through anode, such as, for example, a dimensi... | 05/06/2008 |
| 7335289 | High purity electrolytic copper and its production method A method of producing high purity electrolytic copper through halide-bath electrowinning is provided. The method includes the steps of: growing copper in dendritic form to be deposited on a cathode; and recovering growth ends of 3.0 mm or shorter from the dendrites.... | 02/26/2008 |
| 7153590 | Composite copper foil and manufacturing method thereof A composite copper foil (10) comprises a carrier foil (12) formed by electrodeposition onto a cathode, the carrier foil (12) having a cathode side formed in contact with the cathode and an opposite electrolyte side. A very thin release layer ( | 12/26/2006 |
| 7122105 | Use of siderophores to increase the current efficiency of iron plating solutions A method of electroplating iron or an iron alloy with a solution containing an iron-chelating agent to catalytically cycle the undesirable Fe(III) species back to Fe(II) for electroplating. The iron-chelating agents may be siderophores, specifically, for example, de... | 10/17/2006 |
| 6958247 | Method of electroplating copper over a patterned dielectric layer to enhance process uniformity of a subsequent CMP process In a new method of plating metal onto dielectric layers including small diameter vias and large diameter trenches, a surface roughness is created at least on non-patterned regions of the dielectric layer to enhance the uniformity of material removal in a subsequent ... | 10/25/2005 |
| 6896788 | Method of producing a higher-purity metal A method of producing a higher purity metal comprising the step of electrolyzing a coarse metal material by a primary electrolysis to obtain a primary electrodeposited metal, the step of electrolyzing the material with the primary electrodeposited metal obtained in ... | 05/24/2005 |
| 6835297 | High current density electrolytic decomposition process for copper The method for electrolytically refining copper makes use of crude copper as an anode and is characterized in that the temperature of the electrolyte in an electrolytic cell is maintained at a level of not less than 55° C.; that the electrolyte is continuously intr... | 12/28/2004 |
| 6692628 | Process to remove ferric iron impurities from an acidic aqueous solution used in the electro-winning of copper A process for the removal of primarily iron impurities from acidic aqueous electrolytic solutions used in the electro-winning of copper is described. Strong base Type 1 ion exchange resin is used to remove acid from the solution resulting in a treated sol... | 02/17/2004 |
| 6663758 | Method and apparatus for producing electrolytic copper foil An electrolytic copper foil is electrodeposited onto the cathodic drum surface of a rotating cathode drum by feeding an electrolytic solution between the cathode drum and an anode facing each other and applying direct current between them, while the initi... | 12/16/2003 |
| 6599414 | Solvent extraction processes for metal recovery An improvement in the solvent extraction process for recovering metal values, i.e. copper, from acidic aqueous solutions containing copper and iron which may also include chloride, and more particularly to an improvement which provides for increased coppe... | 07/29/2003 |
| 6547949 | Method for preventing stray currents in peripheral system parts during an electrolysis process for obtaining metals The electrolyte is supplied from a reservoir through at least one supply line to an electrolysis area including anodes and cathodes and at least one electric d.c. voltage source, and used electrolyte is at least partly recirculated from the electrolysis a... | 04/15/2003 |
| 6537439 | Method and apparatus for recovering a reaction product produced at a surface A method and apparatus are described for removing a chemical product species produced by electrochemical action at an electrode or by a chemical reaction which occurs at the surface of a solid catalyst. The method involves providing a flow of a host solut... | 03/25/2003 |
| 6521117 | Method for metal recovery from aqueous solutions The present invention is directed to an improved process for the recovery of metal ions from metal-containing aqueous solutions using a supported liquid membrane (SLM) whereby the pH of the metal-containing solution is preferably adjusted to between 5.5 a... | 02/18/2003 |
| 6511591 | Method for the electrolytic refining of copper The present invention concerns a method for the prevention of anode passivation in the electrolytic refining of copper, when periodic reversal current technology is used in electrolysis. The method is particularly suitable for the electrolytic refining of... | 01/28/2003 |
| 6398939 | Method and apparatus for controlling flow in an electrodeposition process An electrowinning cell, having a tank with an opened upper end defined by a tank edge, electrolyte within the tank and a plurality of flat, metallic electrode plates disposed within the tank in side-by-side, spaced-apart, parallel relationship. Adjacent e... | 06/04/2002 |
| 6372111 | Method and apparatus for reclaiming a metal from a CMP process for use in an electroplating process A method and apparatus is disclosed for reclaiming a metal from the effluent of a chemical mechanical planarization (CMP) process and using the reclaimed metal in an electroplating process. The steps of the method include using a chemical solution in a CM... | 04/16/2002 |
| 6332973 | CMOS chemical bath purification CMOS processing is enhanced via a method and system that use a chemical bath purification process. According to an example embodiment of the present invention, solution from a CMOS wet chemical bath is passed over a powered circuit. The powered circuit pl... | 12/25/2001 |
| 6322609 | Low density high surface area copper powder and electrodeposition process for making same This invention relates to a low density high surface area copper powder having an apparent density in the range of about 0.20 to about 0.60 gram per cubic centimeter, and a surface area of at least about 0.5 square meter per gram. This invention also rela... | 11/27/2001 |
| 6309969 | Copper metallization structure and method of construction The invention is directed to the use of copper as via and interconnect structures for an integrated circuit. The process in accordance with a preferred embodiment produces an interconnect layer of continuous copper with superior adhesion while requiring o... | 10/30/2001 |
| 6306282 | Sludge-free treatment of copper CMP wastes Waste slurry containing dissolved metal from e.g., CMP is subjected to sludge-free processing. Embodiments include separating the waste slurry with a solids filter into a solids-free dissolved metal-containing liquid filtrate portion and a concentrated so... | 10/23/2001 |
| 6187169 | Generation of organosulfonic acid from its salts A procedure for the generation of organosulfonic acids from solutions of corresponding metal organosulfonate compounds by electrowinning, electrolytically driven hydrolysis or chemically driven hydrolysis is described. Appropriate organosulfonate compound... | 02/13/2001 |
| 6176997 | Apparatus and method for copper extraction by in-situ electrolysis in heap-leaching of ores Copper is extracted from a heap of low-grade ore by transforming the heap into an electrolytic cell, and imposing a voltage thereon. Anodic conditions of redox and pH cause the sulphide to break down, and the copper to pass into solution. The copper can b... | 01/23/2001 |
| 6149797 | Method of metal recovery using electrochemical cell A high performance method for recovery of metal from aqueous solutions is carried out using an electrochemical cell having a cathode assembly that includes a nonporous support member, a primary cathode, and a nonconductive or conductive porous material co... | 11/21/2000 |
| 6045669 | Structure of electric contact of electrolytic cell The present invention provides a structure of an electric contact of an electrolytic cell, wherein an elongated conductive member is provided as a bus bar 10 on a wall of an electrolytic cell for feeding current to anodes 1 and cathodes 2 arranged in the ... | 04/04/2000 |
| 6036839 | Low density high surface area copper powder and electrodeposition process for making same This invention relates to a low density high surface area copper powder having an apparent density in the range of about 0.20 to about 0.60 gram per cubic centimeter, and a surface area of at least about 0.5 square meter per gram. This invention also rela... | 03/14/2000 |
| 5997711 | Control agent for reducing metal acid mist emissions from electrolytic cell operations Disclosed is a method for reducing metal acid or salt evolved from electrolytic baths housed in electrolytic tanks during electrolytic operations. This method involves covering all of the surface of the electrolytic bath with a layer of shredded foam (e.g... | 12/07/1999 |
| 5876588 | Process for removing and recovering copper, silver and zinc from sulfide ores Ores containing copper, zinc, silver in the form of sulfides are treated by a solution of sulfurated sulfite ions and ammonium ions in order to remove most of the metals from the sulfide ores. This treatment renders the resulting gold bearing ores much mo... | 03/02/1999 |
| 5855756 | Methods and apparatus for enhancing electrorefining intensity and efficiency An electrorefining cell permits increased electrolyte flow rates while maintaining the slime layer at the bottom of the cell and on the anode faces substantially intact. The cell includes an inlet manifold located near the bottom of the cell and having a ... | 01/05/1999 |
| 5837123 | Prevention of cathode corrosion during electrowinning A method to prevent corrosion of a stainless steel cathode in a copper electrowinning system uses compounds added to the electrowinning solution which reduce the level of free chlorine. Examples of such compounds are thiourea, alkyl sulphonate surfactants... | 11/17/1998 |
| 5820653 | Process for making shaped copper articles This invention relates to a process for making a shaped copper article directly from a copper-bearing material, comprising: (A) contacting said copper-bearing material with an effective amount of at least one aqueous leaching solution to dissolve copper i... | 10/13/1998 |
| 5783057 | Method of purifying copper electrolytic solution A method of purifying a copper electrolytic solution circulated in a copper electrorefining system, wherein a portion of the solution is withdrawn and recycled to the system after purification treatment. The purification treatment includes the addition of... | 07/21/1998 |
| 5720867 | Process for the electrochemical recovery of the metals copper, zinc, lead, nickel or cobalt An electrolytic cell comprising bipolar electrodes is employed for electrochemical deposition of copper, zinc, lead, nickel or cobalt. An interior space is provided between the cathode side and the anode side of a bipolar electrode. The electrolyte can fl... | 02/24/1998 |
| 5650057 | Chloride assisted hydrometallurgical extraction of metal A process for the extraction of a metal from an ore or concentrate comprises subjecting the ore or concentrate to pressure oxidation in the presence of oxygen and an acidic solution containing halogen ions and a source of bisulphate or sulphate ions, such... | 07/22/1997 |
| 5626739 | Electrokinetic leaching A method of treating a solid material containing a substance of economic importance so as to recover or extract the substance from the material involving the following: forming a conducting mixture of the solid with a liquid so that at least some of the s... | 05/06/1997 |
| 5620584 | Electrochemical reduction of metal salts as a method of preparing highly dispersed metal colloids and substrate fixed metal clusters by electrochemical reduction of metal salts The object of the invention is a method for the electrochemical preparation of metal colloids with particle sizes of less than 30 nm, characterized in that one or more salts of one or more metals of groups Ib, IIb, III, IV, V, VI, VIIb, VIII, lanthanoides... | 04/15/1997 |
| 5534131 | Process for heavy metals electrowinning The conditions for electrowinning Zn, Ni, Co and Cd metals from baths based on chlorinated ammino complexes of Me(NH3)n Clm type are substantially improved by the addition of small levels of dissolved Br, which considerabl... | 07/09/1996 |
