Lead Patents (Class 423/619)
  • Patent number: 10468671
    Abstract: The present invention deals with employing Heteroatoms namely Nitrogen, Sulphur intrinsic embedded carbon nanotubes (H-CNT) as multifunctional additive for preparing lead acid battery electrodes to substitute the expander chemicals namely, Vanisperse, Dinel Fibre, Barium sulphate and carbon black. Further the invention provides H-CNT in-situ produced from Crude oil or its products.
    Type: Grant
    Filed: March 12, 2018
    Date of Patent: November 5, 2019
    Assignee: INDIAN OIL CORPORATION LIMITED
    Inventors: Palvannan Mohanasundaram, Bhanumurthy Samala, Narayanam Seshubabu, Amardeep Singh, Naduhatty Selai Raman, Sankara Sri Venkata Ramakumar, Biswapriya Das
  • Patent number: 9322078
    Abstract: The invention relates to a method of feeding a fuel gas into the reaction shaft of a suspension smelting furnace and to a concentrate burner for feeding a reaction gas and fine solid matter into the reaction shaft of the suspension smelting furnace. In the method, fuel gas (16) is fed by the concentrate burner (4) to constitute part of the mixture formed by the pulverous solid matter (6) and the reaction gas (5), so that a mixture containing the pulverous solid matter (6), reaction gas (5) and fuel gas (6) is formed in the reaction shaft (2). The concentrate burner (4) comprises fuel gas feeding equipment (15) for adding the fuel gas (16) to constitute part of the mixture that is formed by fine solid matter (6) and reaction gas (5).
    Type: Grant
    Filed: October 19, 2010
    Date of Patent: April 26, 2016
    Assignee: Outotec Oyj
    Inventor: Jussi Sipilä
  • Patent number: 9005568
    Abstract: The invention provides a process for production of powder of perovskite compound which comprises: the first step for obtaining an aggregate of perovskite compound which comprises at least one A group element selected from the group consisting of Mg, Ca, Sr, Ba and Pb and at least one B group element selected from the group consisting of Ti, Zr, Hf and Sn, and which is represented by the general formula ABO3 wherein A is at least one A group element and B is at least one B group element; and the second step for heating the aggregate of perovskite compound obtained in the first step in a solvent at a temperature in a range from 30° C. to 500° C. whereby disintegrating the aggregate.
    Type: Grant
    Filed: February 9, 2005
    Date of Patent: April 14, 2015
    Assignee: Sakai Chemical Industry Co., Ltd.
    Inventors: Takashi Shikida, Shinji Ogama, Yoshiaki Ikeda, Kazuhisa Hidaka
  • Patent number: 8980203
    Abstract: The present invention relates to the recovery of high purity litharge from spent lead acid battery paste at a low temperature which does not produce sulfur dioxide. In the process lead acetate or other lead salt is produced which is converted to high purity litharge by precipitation with a base.
    Type: Grant
    Filed: May 24, 2013
    Date of Patent: March 17, 2015
    Assignee: Retriev Technologies Incorporated
    Inventors: W. Novis Smith, Steven Kinsbursky
  • Publication number: 20150056798
    Abstract: Some embodiments include methods of forming memory cells. Metal oxide may be deposited over a first electrode, with the deposited metal oxide having a relatively low degree of crystallinity. The degree of crystallinity within the metal oxide may be increased after the deposition of the metal oxide. A dielectric material may be formed over the metal oxide, and a second electrode may be formed over the dielectric material. The degree of crystallinity may be increased with a thermal treatment. The thermal treatment may be conducted before, during, and/or after formation of the dielectric material.
    Type: Application
    Filed: October 3, 2014
    Publication date: February 26, 2015
    Inventors: Noel Rocklein, Durai Ramaswamy, Dale W. Collins, Swapnil Lengade, Srividya Krishnamurthy, Mark S. Korber
  • Publication number: 20150024204
    Abstract: The present invention relates a process of preparing a nanopowder by using a natural source starting material wherein the nano powder is a nano metal or nano alloy or nano metal oxide or nano metal carbide or nano compound or nano composite or nanofluid. The nano product produced by the process has novel properties such as enhanced hardness, antibacterial properties, thermal properties, electrical properties, abrasive resistant, wear resistant, superior frictional properties, sliding wear resistance, enhanced tensile strength, compression strengths, enhanced load bearing capacity and corrosion properties.
    Type: Application
    Filed: January 9, 2013
    Publication date: January 22, 2015
    Inventor: Sudhakara Sastry AMANCHI BALA
  • Publication number: 20140286846
    Abstract: A process for preparing a mesoporous metal oxide, i.e., transition metal oxide, Lanthanide metal oxide, a post-transition metal oxide and metalloid oxide. The process comprises providing a micellar solution comprising a metal precursor, an interface modifier, a hydrotropic ion precursor, and a surfactant; and heating the micellar solution at a temperature and for a period of time sufficient to form the mesoporous metal oxide. A mesoporous metal oxide prepared by the above process. A method of controlling nano-sized wall crystallinity and mesoporosity in mesoporous metal oxides. The method comprises providing a micellar solution comprising a metal precursor, an interface modifier, a hydrotropic ion precursor, and a surfactant; and heating the micellar solution at a temperature and for a period of time sufficient to control nano-sized wall crystallinity and mesoporosity in the mesoporous metal oxides. Mesoporous metal oxides and a method of tuning structural properties of mesoporous metal oxides.
    Type: Application
    Filed: September 25, 2013
    Publication date: September 25, 2014
    Applicant: UNIVERSITY OF CONNECTICUT
    Inventors: Steven L. Suib, Altug Suleyman Poyraz
  • Patent number: 8834832
    Abstract: A process comprises (a) combining (1) at least one base and (2) at least one metal carboxylate salt comprising (i) a metal cation selected from metal cations that form amphoteric metal oxides or oxyhydroxides and (ii) a lactate or thiolactate anion, or metal carboxylate salt precursors comprising (i) at least one metal salt comprising the metal cation and a non-interfering anion and (ii) lactic or thiolactic acid, a lactate or thiolactate salt of a non-interfering, non-metal cation, or a mixture thereof; and (b) allowing the base and the metal carboxylate salt or metal carboxylate salt precursors to react.
    Type: Grant
    Filed: December 16, 2008
    Date of Patent: September 16, 2014
    Assignee: 3M Innovative Properties Company
    Inventor: Timothy D. Dunbar
  • Patent number: 8815192
    Abstract: A cyclical system that uses a metal hydroxide to produce a metal carbonate, remove carbon dioxide from a waste gas source, and produce more metal hydroxide needed for the beginning of the cycle. Initially, the metal hydroxide is mixed with waste gases in a carbon dioxide scrubber. The scrubber reacts the carbon dioxide with the metal hydroxide to produce a metal carbonate. Some of the metal carbon is removed, therein removing carbon dioxide from the environment. Some of the metal carbonate is heated to produce metal oxide and carbon dioxide. The carbon dioxide is drawn away. Oxygen is introduced into the reaction chamber. The oxygen reacts with the metal oxide to produce an oxidized metal oxide and heat. The oxidized metal oxide is reduced with an acid and volatile base to produce metal hydroxide. The metal hydroxide is recycled. The acid is regenerated. The volatile base is recovered and recycled.
    Type: Grant
    Filed: June 9, 2011
    Date of Patent: August 26, 2014
    Inventor: Calvin E. Phelps, Sr.
  • Patent number: 8617510
    Abstract: Porous metal oxides are provided. The porous metal oxides are prepared by heat treating a coordination polymer. A method of preparing the porous metal oxide is also provided. According to the method, the shape of the particles of the metal oxide can be easily controlled, and the shape and distribution of pores of the porous metal oxide can be adjusted.
    Type: Grant
    Filed: May 20, 2010
    Date of Patent: December 31, 2013
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Dong-min Im, Yong-nam Ham
  • Patent number: 8609053
    Abstract: The present invention provides a process for the preparation of nanowires of metal oxides with dopant elements in lower valence state. The nanomaterials/materials with dopants in lower valence state are important as these exhibit markedly different characteristics than higher valence state materials of same composition. Nanowires show markedly enhanced properties in lateral direction. The invented process presents a procedure for preparation of different types of nanowires in oxide form that are useful for different applications. In this a precursor is ignited in a specially designed container/enclosure that produces the product with the described features. The process is simple and involves a single step/stage is of very short time per batch. The invention provides a process, which gives controlled size of nanowires and is suitable for the production of nanowires/nanomaterials of desired metal oxides with dopant elements in valence state.
    Type: Grant
    Filed: June 6, 2008
    Date of Patent: December 17, 2013
    Assignee: Council of Scientific & Industrial Research
    Inventors: Harish Chander, Virendra Shanker, Divi Haranath, Pooja Sharma
  • Patent number: 8568684
    Abstract: Methods are described that have the capability of producing submicron/nanoscale particles, in some embodiments dispersible, at high production rates. In some embodiments, the methods result in the production of particles with an average diameter less than about 75 nanometers that are produced at a rate of at least about 35 grams per hour. In other embodiments, the particles are highly uniform. These methods can be used to form particle collections and/or powder coatings. Powder coatings and corresponding methods are described based on the deposition of highly uniform submicron/nanoscale particles.
    Type: Grant
    Filed: January 13, 2010
    Date of Patent: October 29, 2013
    Assignee: NanoGram Corporation
    Inventors: Xiangxin Bi, Nobuyuki Kambe, James T. Gardner, Ronald J. Mosso, Shivkumar Chiruvolu, Sujeet Kumar, William E. McGovern
  • Patent number: 8562923
    Abstract: The present invention relates to the recovery of high purity litharge from spent lead acid battery paste at a low temperature which does not produce sulfur dioxide. In the process lead acetate is produced which is converted to pure litharge.
    Type: Grant
    Filed: October 25, 2012
    Date of Patent: October 22, 2013
    Assignee: Toxco, Inc.
    Inventors: W. Novis Smith, Steven A. Kinsbursky
  • Publication number: 20130220178
    Abstract: The current invention relates to a method of making metal oxide nanoparticles comprising the reaction of—at least one metal oxide precursor (P) containing at least one metal (M) with—at least one monofunctional alcohol (A) wherein the hydroxy group is bound to a secondary, tertiary or alpha-unsaturated carbon atom—in the presence of at least one aliphatic compound (F) according to the formula Y1—R1—X—R2—Y2, wherein—R1 and R2 each are the same or different and independently selected from aliphatic groups with from 1 to 20 carbon atoms, —Y1 and Y2 each are the same or different and independently selected from OH, NH2 and SH, and —X is selected from the group consisting of chemical bond, —O—, —S—, —NR3—, and CR4R5, wherein R3, R4 and R5 each are the same or different and represent a hydrogen atom or an aliphatic group with from 1 to 20 carbon atoms which optionally carries functional groups selected from OH, NH2 and SH.
    Type: Application
    Filed: October 7, 2010
    Publication date: August 29, 2013
    Applicant: Justus-Liebig-Universitat Giessen
    Inventors: Roman Zieba, Alexander Traut, Cornelia Röger-Göpfert, Torsten Brezesinski, Bernadette Landschreiber, Claudia Grote, Georg Garnweitner, Alexandra Seeber, Bernd Smarsly, Christoph Wiedmann, Till von Graberg, Jan Haetge
  • Publication number: 20130109147
    Abstract: Some embodiments include methods of forming memory cells. Metal oxide may be deposited over a first electrode, with the deposited metal oxide having a relatively low degree of crystallinity. The degree of crystallinity within the metal oxide may be increased after the deposition of the metal oxide. A dielectric material may be formed over the metal oxide, and a second electrode may be formed over the dielectric material. The degree of crystallinity may be increased with a thermal treatment. The thermal treatment may be conducted before, during, and/or after formation of the dielectric material.
    Type: Application
    Filed: October 26, 2011
    Publication date: May 2, 2013
    Applicant: MICRON TECHNOLOGY, INC.
    Inventors: Noel Rocklein, D.V. Nirmal Ramaswamy, Dale W. Collins, Swapnil Lengade, Srividya Krishnamurthy, Mark Korber
  • Patent number: 8318126
    Abstract: The present invention includes a method of producing a crystalline metal oxide nanostructure. The method comprises providing a metal salt solution and providing a basic solution; placing a porous membrane between the metal salt solution and the basic solution, wherein metal cations of the metal salt solution and hydroxide ions of the basic solution react, thereby producing a crystalline metal oxide nanostructure.
    Type: Grant
    Filed: May 4, 2010
    Date of Patent: November 27, 2012
    Inventors: Stanislaus S. Wong, Hongjun Zhou
  • Patent number: 8273413
    Abstract: A method of forming a metal oxide nanostructure comprises disposing a chelated oligomeric metal oxide precursor on a solvent-soluble template to form a first structure comprising a deformable chelated oligomeric metal oxide precursor layer; setting the deformable chelated oligomeric metal oxide precursor layer to form a second structure comprising a set metal oxide precursor layer; dissolving the solvent-soluble template with a solvent to form a third structure comprising the set metal oxide precursor layer; and thermally treating the third structure to form the metal oxide nanostructure.
    Type: Grant
    Filed: July 2, 2009
    Date of Patent: September 25, 2012
    Assignee: International Business Machines Corporation
    Inventors: Ho-Cheol Kim, Robert D. Miller, Oun Ho Park
  • Patent number: 8257679
    Abstract: A technique for bonding an organic group with the surface of fine particles such as nanoparticles through strong linkage is provided, whereas such fine particles are attracting attention as materials essential for development of high-tech products because of various unique excellent characteristics and functions thereof. Organically modified metal oxide fine particles can be obtained by adapting high-temperature, high-pressure water as a reaction field to bond an organic matter with the surface of metal oxide fine particles through strong linkage. The use of the same condition enables not only the formation of metal oxide fine particles but also the organic modification of the formed fine particles. The resulting organically modified metal oxide fine particles exhibit excellent properties, characteristics and functions.
    Type: Grant
    Filed: July 27, 2009
    Date of Patent: September 4, 2012
    Assignee: Tohoku Techno Arch Co., Ltd.
    Inventor: Tadafumi Ajiri
  • Patent number: 8147780
    Abstract: Wet process of low environmental impact recovers the lead content of an electrode slime and/or of lead minerals in the valuable form of high purity-lead carbonates that are convertible to highly pure lead oxide by heat treatment in oven at relatively low temperature, perfectly suited for making active electrode pastes of new batteries or other uses.
    Type: Grant
    Filed: January 15, 2008
    Date of Patent: April 3, 2012
    Assignee: Millbrook Lead Recycling Technologies Limited
    Inventor: Federica Martini
  • Patent number: 8080230
    Abstract: The invention relates to fine-particulate zirconium titanates or lead zirconium titanates and a method for production thereof by reaction of titanium dioxide particles with a zirconium compound or a lead and zirconium compound. The titanium dioxide particles have a BET surface of more than 50 m2/g. The lead zirconium titanates can be used for the production of microelectronic components.
    Type: Grant
    Filed: December 13, 2005
    Date of Patent: December 20, 2011
    Assignee: Tronox Pigments GmbH
    Inventors: Gerhard Auer, Horst Günnel, Frank Hipler, Michael J. Hoffman, Susanne Wagner, Hans Kungl
  • Patent number: 7998440
    Abstract: An outstandingly low environmental impact wet process recovers the lead content of an electrode slime and/or of lead minerals in the valuable form of high purity lead oxide or compound convertible to highly pure lead oxide by heat treatment in oven at relatively low temperature, perfectly suited for making active electrode pastes of new batteries or other uses.
    Type: Grant
    Filed: November 3, 2009
    Date of Patent: August 16, 2011
    Assignee: Millbrook Lead Recycling Technologies Limited
    Inventor: Federica Martini
  • Publication number: 20110195142
    Abstract: A heat-reactive resist material of the invention is characterized in that the boiling point of the fluoride of the element is 200° C. or more. By this means, it is possible to achieve the heat-reactive resist material having high resistance to dry etching using fluorocarbons to form a pattern with the deep groove depth.
    Type: Application
    Filed: October 13, 2009
    Publication date: August 11, 2011
    Applicant: ASAHI KASEI KABUSHIKI KAISHA
    Inventors: Yoshimichi Mitamura, Kazuyuki Furuya, Norikiyo Nakagawa, Masatoshi Maeda
  • Patent number: 7943256
    Abstract: A method for producing at least one lead battery electrode, comprising the step of disposing an active paste on a support in such a manner as to form said electrode, and locating said electrode in a controlled atmosphere environment to expose said electrode to a gas enriched in ozone, characterised in that said electrode is exposed to an ozone-enriched gas of flow rate less than 100 liters per hour for each square meter of surface of said electrode.
    Type: Grant
    Filed: October 17, 2006
    Date of Patent: May 17, 2011
    Assignees: P.C. Di Pompeo Catelli, Oerlikon Stationar-Batterien AG Aesch BL
    Inventors: Cesare Catelli, Pascal Häring
  • Patent number: 7906084
    Abstract: Disclosed is a method for producing, controlling the shape and size of, Pb-chalcogenide nanoparticles. The method includes preparing a lead (Pb) precursor containing Pb and a carboxylic acid dissolved in a hydrocarbon solution and preparing a chalcogen element precursor containing a chalcogen element dissolved in a hydrocarbon solution. The amount of Pb and chalcogen in the respective precursor affords for a predetermined Pb:chalcogen element ratio to be present when the Pb precursor is mixed with the chalcogen element precursor. The Pb precursor is mixed with the chalcogen element precursor to form a Pb-chalcogen mixture in such a manner that Pb-chalcogenide nanoparticle nucleation does not occur. A nucleation and growth solution containing a surfactant is also prepared by heating the solution to a nucleation temperature sufficient to nucleate nanoparticles when the Pb-chalcogen element mixture is added.
    Type: Grant
    Filed: May 30, 2007
    Date of Patent: March 15, 2011
    Assignees: Toyota Motor Engineering & Manufacturing North America, Inc., University of California, Berkeley
    Inventors: Taleb Mokari, Minjuan Zhang, Peidong Yang
  • Patent number: 7867471
    Abstract: A process of producing a ceramic powder including providing a plurality of precursor materials in solution, wherein each of the plurality of precursor materials in solution further comprises at least one constituent ionic species of a ceramic powder, combining the plurality of precursor materials in solution with an onium dicarboxylate precipitant solution to cause co-precipitation of the ceramic powder precursor in a combined solution; and separating the ceramic powder precursor from the combined solution. The process may further include calcining the ceramic powder precursor.
    Type: Grant
    Filed: April 3, 2009
    Date of Patent: January 11, 2011
    Assignee: SACHEM, Inc.
    Inventor: Wilfred Wayne Wilson
  • Patent number: 7785561
    Abstract: A process for producing high purity lead oxide from impure lead compounds particularly from waste lead battery paste which includes an oxidation-reduction step. The process results in a reduction of impure lead compounds to the +2 valence state and metal particle contaminants are oxidized to the +2 state.
    Type: Grant
    Filed: February 18, 2009
    Date of Patent: August 31, 2010
    Assignees: Toxco. Inc, Kinsbursky Brothers, Inc.
    Inventors: W. Novis Smith, Steven A. Kinsbursky
  • Publication number: 20090298699
    Abstract: The invention offers a production method of a material powder of an oxide superconductor. The production method is provided with both a step of producing a dry powder by removing solvent from a solution containing elements for constituting the oxide superconductor and a step of producing oxides of the elements for constituting the oxide superconductor by scattering the dry powder in a high-temperature furnace. Provided with the above steps, the production method not only can achieve the uniform presence of the elements for constituting the oxide superconductor but also enables the mass production of the material powder.
    Type: Application
    Filed: March 13, 2008
    Publication date: December 3, 2009
    Applicant: SUMITOMO ELECTRIC INDUSTRIES ,LTD.
    Inventor: Naoki Ayai
  • Publication number: 20090123354
    Abstract: A solid material is presented for the partial oxidation of natural gas. The solid material includes a solid oxygen carrying agent and a hydrocarbon activation agent. The material precludes the need for gaseous oxygen for the partial oxidation and provides better control over the reaction.
    Type: Application
    Filed: November 14, 2007
    Publication date: May 14, 2009
    Inventors: Deng-Yang Jan, Joel T. Walenga, Kurt M. Vanden Bussche, Joseph A. Kocal, Lisa M. King
  • Patent number: 7507496
    Abstract: A process for recovering lead oxides from the spent paste of exhausted lead acid batteries. The process provides heating the spent paste with an alkali hydroxide solution at elevated temperatures prior to calcinations. Calcination is at various temperatures so that either lead mono-oxide, lead dioxide or red lead is obtained as the principal product. There is also provided the use of the lead oxide to prepare the paste for positive and negative electrodes or other lead compounds.
    Type: Grant
    Filed: December 7, 2004
    Date of Patent: March 24, 2009
    Assignees: Toxco, Inc, Kinsbursky Brothers Inc
    Inventors: Steven A. Kinsbursky, W. Novis Smith, Richard Schutte
  • Publication number: 20080260612
    Abstract: Multi-step metal compound oxidation process to produce compounds and enhanced metal oxides from various source materials, e.g. metal sulfides, carbides, nitrides and other metal containing materials with metal oxides from secondary reaction steps being utilized as an oxidation agent in the first reactions.
    Type: Application
    Filed: April 18, 2008
    Publication date: October 23, 2008
    Applicant: Orchard Material Technology, LLC
    Inventor: Lawrence F. McHugh
  • Patent number: 7338647
    Abstract: The present invention relates to a method for preparing an electroactive metal polyanion or a mixed metal polyanion comprising forming a slurry comprising a polymeric material, a solvent, a polyanion source or alkali metal polyanion source and at least one metal ion source; heating said slurry at a temperature and for a time sufficient to remove the solvent and form an essentially dried mixture; and heating said mixture at a temperature and for a time sufficient to produce an electroactive metal polyanion or electroactive mixed metal polyanion.
    Type: Grant
    Filed: May 20, 2004
    Date of Patent: March 4, 2008
    Assignee: Valence Technology, Inc.
    Inventors: Biying Huang, Jeffrey Swoyer, M. Yazid Saidi, Haitao Huang
  • Patent number: 7208133
    Abstract: A high temperature non-aqueous synthetic procedure for the preparation of substantially monodisperse IV-VI semiconductor nanoparticles is provided. The procedure includes introducing a first precursor selected from the group consisting of a molecular precursor of a Group IV element and a molecular precursor of a Group VI element into a reaction vessel that comprises at least an organic solvent to form a mixture. Next, the mixture is heated and thereafter a second precursor of a molecular precursor of a Group IV element or a molecular precursor of a Group VI element that is different from the first is added. The reaction mixture is then mixed to initiate nucleation of IV-VI nanocrystals and the temperature of the reaction mixture is controlled to provide nanoparticles having a diameter of about 20 nm or less.
    Type: Grant
    Filed: November 22, 2004
    Date of Patent: April 24, 2007
    Assignee: International Business Machines Corporation
    Inventors: Kyung-Sang Cho, Wolfgang Gaschler, Christopher B. Murray, Dmitri Talapin
  • Patent number: 7118727
    Abstract: The present invention provides a process for producing particles, such as oxide nanoparticles, in a substantially water-free environment. The process involves mixing at least one metal compound of the formula MX(m?n) with at least one surfactant and at least one solvent, wherein M is an electropositive element of Groups 1–15; each X is independently selected from the group consisting of O1/2, F, Cl, Br, I, OR, O2CR, NR2, and R; each R is independently a hydrocarbyl group; n is equal to ½ the oxidation state of the metal M in the product particle; and m is equal to the oxidation state of the element M. The components are typically combined to form a mixture which is thermally treated for a time period sufficient to convert the metal compound into particles of the corresponding oxide, having sizes in a range between about 0.5 nanometer and about 1000 nanometers.
    Type: Grant
    Filed: June 16, 2003
    Date of Patent: October 10, 2006
    Assignee: General Electric Company
    Inventor: Darryl Stephen Williams
  • Patent number: 7060245
    Abstract: The invention relates generally to the manufacture of ortho-rhombic litharge (yellow lead oxide) and in particular to a process for the continuous refining of litharge and a loopreactor for the refining of litharge.
    Type: Grant
    Filed: November 24, 2000
    Date of Patent: June 13, 2006
    Assignee: Hammond Group, Inc.
    Inventors: Hanns G. Klotz, William Peter Wilke, IV
  • Patent number: 6984369
    Abstract: Disclosed is a process for making surfactant capped nanocrystals of metal oxides which are dispersable in organic solvents. The process comprises decomposing a metal cupferron complex of the formula MXCupX, wherein M is a metal, and Cup is a N-substituted N-Nitroso hydroxylamine, in the presence of a coordinating surfactant, the reaction being conducted at a temperature ranging from about 150 to about 400° C., for a period of time sufficient to complete the reaction. Also disclosed are compounds made by the process.
    Type: Grant
    Filed: November 22, 2000
    Date of Patent: January 10, 2006
    Assignee: The Regents of the University of California
    Inventors: A. Paul Alivisatos, Joerg Rockenberger
  • Patent number: 6858562
    Abstract: A catalyst of a water insoluble vanadyl sulfate or a complex catalyst, in which a specific oxide and a specific sulfate are combined to the water insoluble vanadyl sulfate are excellent not only in their activity, durability and SO2 resistance, not only in substantially no oxidization of SO2 to SO3 as in HCl resistant. Therefore, using this catalyst, a decomposition treatment of an organic halide(s) can be carried out with high efficiency and good stability. In particular, a efficient decomposition treatment of an organic halides(s) can be carried out also in the cases that dust is coexist; the gas to be treated contains SOX or HCl; or they generate in the decomposition area.
    Type: Grant
    Filed: September 27, 2000
    Date of Patent: February 22, 2005
    Assignees: Mitsui Chemicals, Inc., UBE Industries, Ltd.
    Inventors: Isao Takasu, Kenji Fujita
  • Publication number: 20030175203
    Abstract: The invention relates to a method for rapidly curing positive lead accumulator plates. According to said method, the plates are separated and treated with water vapour for a period of less than 3 hours. The method is characterised in that the curing takes place at environmental temperatures of above 60° C. and that the type of lead sulphates that form during the curing process is controlled. To achieve this for example, finely crystalline tetrabasic lead sulphates are formed by the addition of seed crystals and the formation of tetrabasic lead sulphates is prevented by the addition of an expander. The invention enables the entire curing process to be reduced in an advantageous manner to approximately 4 h, thus improving the cost-effectiveness of the method.
    Type: Application
    Filed: May 6, 2003
    Publication date: September 18, 2003
    Inventors: Werner Nitsche, Norbert Lahme
  • Patent number: 6468498
    Abstract: A composite metal material of formula (I) are stable and not deteriorated for a long time and have excellent activities in photolyzing water with visible light: x(A)y(B)z(C)-p(P)n(N)  (I) wherein, (A) is Pb(Mg1/3Nb2/3)O3 or Pb(Zn1/3Nb2/3)O3, (B) is PbTiO3, (C) is LiTaO3, (P) is a metal selected from the group consisting of Pt, Au, Ag, Pd and Rh, (N) is an oxide of a metal selected from the group consisting of Ni, Co, Fe, Sr, Sc, Ru, Cu and Cd, x is a number in the range of 0.65 to 0.98, y is a number in the range of 0.01 to 0.34, z is a number in the range of 0.01 to 0.1, and p and n are each independently a number in the range of 0.01 to 5.
    Type: Grant
    Filed: May 25, 2001
    Date of Patent: October 22, 2002
    Assignee: Idbule Photonics Co., Ltd.
    Inventors: Sang-Goo Lee, Min-Chan Kim, Gil-Seon Kang, Wha-Young Lee, In-Kyu Song, Young-Gwan Ko
  • Patent number: 6440384
    Abstract: Composition of matter useful as an active mass of positive electrodes for a lead acid storage cell has an X-ray diffraction pattern substantially as shown in the. Figure. The matter is formed from lead-cadmium deposits using a methanesulfonic acid electrolyte system and pulse current.
    Type: Grant
    Filed: February 21, 2000
    Date of Patent: August 27, 2002
    Assignee: Hong Kong Polytechnic University
    Inventors: Tin Pui Leung, Ho Ching Wong, Wah-Sing Miu
  • Patent number: 6153156
    Abstract: A process for providing a leady oxide having reduced levels of undesired metallic impurities such as, for example, bismuth and/or silver, comprises roasting the leady oxide to convert part to orthorhombic PbO, exposing the roasted leady oxide to particle size reduction so that the tetragonal PbO can be separated from the orthorhombic PbO fraction, and recovering the orthorhombic fraction having the reduced level of impurities.
    Type: Grant
    Filed: August 2, 1999
    Date of Patent: November 28, 2000
    Assignee: GNB Technologies, Inc.
    Inventors: Michel M. F. Lawrence, Michael A. Kepros
  • Patent number: 6090737
    Abstract: A method for efficient removal of lead co-catalyst species from organic process streams arising from diaryl carbonate synthesis, by contacting the organic reaction mixtures with an aqueous acid, salt, or acid/salt solution, thereby extracting the treated mixture into an aqueous phase, or by treating the organic reaction mixtures with solid oxalic acid or oxalic acid salt, or an aqueous solution of oxalic acid or oxalic acid salt, thereby resulting in precipitation of the lead. The precipitated lead may then be calcined to provide a lead compound that is catalytically active in the carbonylation of phenol to yield diary carbonates. Use of these methods will substantially reduce both financial and environmental concerns for the preparation of diaryl carbonates.
    Type: Grant
    Filed: December 22, 1998
    Date of Patent: July 18, 2000
    Assignee: General Electric Company
    Inventor: John Yaw Ofori
  • Patent number: 5840262
    Abstract: The present invention relates to an improved process for producing lead oxide in a pure state from a spent paste resulting from exhausted acid batteries. The spent paste is first calcined and desulfurized, then leached by a concentrated solution comprising an alkali hydroxide at a temperature above 100.degree. C. The separated solution is contacted with a ketone resulting in a suspension from which the .alpha.-lead oxide constituent is recovered. The solutions of alkali and ketone are recycled in the process. The preferred alkali constituents are selected from sodium hydroxide or potassium hydroxide, preferably containing also a small amount of sulfate of the respective alkali metal of the hydroxide used.
    Type: Grant
    Filed: February 7, 1996
    Date of Patent: November 24, 1998
    Assignee: Margulead Ltd.
    Inventor: Efim Margulis
  • Patent number: 5840267
    Abstract: A method for producing a metal oxide powder which comprises heating a metal or metals in an atmosphere gas comprising a halogen gas, a hydrogen halide gas or a mixture of these gases in a concentration of from 0.5% by volume or more to 99.5% by volume or less; and oxygen, water vapor or a mixture of these gases in a concentration of from 0.5% by volume or more to 99.5% by volume or less.
    Type: Grant
    Filed: June 27, 1996
    Date of Patent: November 24, 1998
    Assignee: Sumitomo Chemical Co., Ltd.
    Inventor: Kunio Saegusa
  • Patent number: 5540915
    Abstract: Highly oxidized lead powder containing red lead not more than 90% is efficiently produced by maturing the lead powder material at a low temperature section of a furnace keeping the temperature less than 100.degree. C. by spraying water to the material and then, by heating the same from 400.degree. to 500.degree. C. at a high temperature section of the furnace. The highly oxidized lead powder produced in this method is preferable as active material of a lead storage battery, that is, a paste preparation and formation treatment become easy and a long life electrode is obtained.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: July 30, 1996
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hiroshi Yasuda, Kazuyoshi Yonezu, Katsuhiro Takahashi, Kenzo Yamamoto
  • Patent number: 5510213
    Abstract: The invention provides an electrode for a lead-acid battery, formed in an essentially continuous process without the need for curing under controlled temperature and humidity conditions. This is accomplished by using a relatively high metallic lead content precursor powder intermingled with a leady-oxide powder. Another aspect of the invention is the use of relatively high surface area leady-oxide powder which contributes to performance. Another important aspect of the invention is that the active material paste is prepared without the use of an acid in a water based process which provides a simpler pasting chemistry. The process eliminates the complex basic lead sulfate reactions found in present methods.
    Type: Grant
    Filed: November 16, 1994
    Date of Patent: April 23, 1996
    Assignee: General Motors Corporation
    Inventors: Eugene G. Gagnon, Daniel J. Lisi
  • Patent number: 5482689
    Abstract: This invention relates to a process for the accelerated production of red lead oxide, the lead oxide to be oxidized being kept in suspension like a fluidized bed, particularly being kept in suspension like a fluidized bed in a stirrer reactor by a stirrer, only part of the finished product being drawn off from the fully oxidized fluidized bed and being replaced by new lead oxide to be oxidized, as well as an apparatus therefor.
    Type: Grant
    Filed: March 5, 1991
    Date of Patent: January 9, 1996
    Assignee: Heubach & Lindgens GmbH & Co. KG.
    Inventor: Reinhard Marx
  • Patent number: 5447708
    Abstract: An apparatus provides high temperature and short residence time conditions for the production of nanoscale ceramic powders. The apparatus includes a confinement structure having a multiple inclined surfaces for confining flame located between the surfaces so as to define a flame zone. A burner system employs one or more burners to provide flame to the flame zone. Each burner is located in the flame zone in close proximity to at least one of the inclined surfaces. A delivery system disposed adjacent the flame zone delivers an aerosol, comprising an organic or carbonaceous carrier material and a ceramic precursor, to the flame zone to expose the aerosol to a temperature sufficient to induce combustion of the carrier material and vaporization and nucleation, or diffusion and oxidation, of the ceramic precursor to form pure, crystalline, narrow size distribution, nanophase ceramic particles.
    Type: Grant
    Filed: May 10, 1993
    Date of Patent: September 5, 1995
    Assignee: Physical Sciences, Inc.
    Inventors: Joseph J. Helble, Gary A. Moniz, Theodore F. Morse
  • Patent number: 5314766
    Abstract: Positive plates are prepared by forming partially oxidized tetrabasic lead sulfate (4 PbO.sub.n . PbSO.sub.4) having at least a part of the oxide (PbO.sub.n) portion in the form of alpha lead dioxide (.varies. - PbO.sub.n), and forming beta lead dioxide (B-PbO.sub.2). Next the oxidized tetrabasic lead sulfate (OXYTTB) and the beta lead dioxide are intermingled in a wet mixture. The wet mixture is applied to the oxidized surface of a lead support substrate. Then, it is heated and pressed for a time and at a temperature and compressive load sufficient to form an adhered or retained coating of active material on the substrate. The OXYTTB is formed by reaction of tetrabasic lead sulfate with magnesium hydroxide and sodium persulfate. Preferably, beta lead dioxide is formed by reacting red lead oxide (Pb.sub.3 O.sub.4) with nitric acid to provide an oxidation product, at least a major portion of which is beta PbO.sub.2, and which has a surface area of at least 10 m.sup.2 /gram.
    Type: Grant
    Filed: October 19, 1992
    Date of Patent: May 24, 1994
    Assignee: General Motors Corporation
    Inventors: Romeo R. Witherspoon, Armand R. Poirier
  • Patent number: 5252311
    Abstract: Phase stable lead monoxide powders are disclosed in which substantially pure free flowing PbO having a crystal phase which is homogeneous, and which phase may be selected from either the litharge or massicot forms, retains such phase homogeneity over extended periods under ambient storage conditions or even under the influence of ultraviolet light. Furthermore, lead monoxide powders and their oxalate precursors whose particles have a plate-like morphology and size which make them ideal for numerous applications are described. These and other compositions, as well as methods for making and utilizing these novel preparations, are included.
    Type: Grant
    Filed: February 7, 1992
    Date of Patent: October 12, 1993
    Inventors: Richard E. Riman, Michael J. Munson
  • Patent number: 5252105
    Abstract: In a preferred method, an electrode for a lead-acid battery is prepared in a new continuous process without the conventional curing step. The general procedure for preparing electrodes includes preparing a mixture (paste) comprising an active material precursor and an inhibitor. The active material precursor includes lead oxides having at least 10% by weight lead oxide in the form of Pb.sub.3 O.sub.4 (red lead), and a BET surface area of at least about 0.8 m.sup.2 /gram; desirably about 1.00 to 1.50 m.sup.2 /gram and preferably about 1.0 to 1.25 m.sup.2 /gram. The inhibitor prevents formation of tribasic lead sulfate and tetrabasic lead sulfate from the precursor material, except at elevated temperature. The paste is applied to electrode grids and reacted at elevated temperatures for between about 5 and about 30 minutes, to form the active material of the electrode for both positive and negative electrodes. Plates are then assembled into batteries and charged.
    Type: Grant
    Filed: October 6, 1992
    Date of Patent: October 12, 1993
    Assignee: General Motors Corporation
    Inventors: Romeo R. Witherspoon, Gregory C. Garabedian
  • Patent number: 4952209
    Abstract: Applicator syringe for a dental compound, with a syringe body (1) tapering into a thin discharge tube (3) and with a piston (5) displaceable in it, the applicator syringe being intended for once-only use. To avoid the need for special actuating tools, but make easy use possible, the effective cross-sectional surface is very small, in particular with a ratio of the useful stroke to the diameter of the syringe piston of at least approximately 10. So that the syringe can nevertheless be filled easily, the diameter of the cylindrical space in the rear portion of the latter is larger than the piston diameter. The syringe body (1) is first produced in a straight form and only thereafter is the discharge tube (3) bent.
    Type: Grant
    Filed: September 13, 1988
    Date of Patent: August 28, 1990
    Inventor: Ernst Muhlbauer