Patents by Inventor Indresh Mathur

Indresh Mathur has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20130111805
    Abstract: A high octane non-leaded gasoline meeting ASTM D910 LL standard is provided that includes a base gasoline fuel having a minimum MON of 96.5 and meeting the ASTM D910 standard. An octane-boosting component is mixed with the base gasoline fuel that raises the MON above 99.6 and the blended fuel complies with ASTM D910. The octane-boosting component is selected from a group including an additive, TEL only and a TEL containing gasoline.
    Type: Application
    Filed: August 29, 2012
    Publication date: May 9, 2013
    Inventors: Indresh Mathur, Jarvis J. Brown
  • Patent number: 8324434
    Abstract: The present invention provides an improved hydrogenation processes wherein heat is efficiently managed so that catalyst productivity is optimized. More particularly, in the processes of the present invention, a nonaqueous solvent is added to a reactant to provide a nonaqueous solvent/reactant mixture that can act as a heat sink and absorb at least a portion of the heat generated within the reactor. Desirably, a reaction product, or a solvent with a minimal number of hydroxyl groups, is utilized so that the formation of unwanted byproducts can be minimized.
    Type: Grant
    Filed: February 28, 2009
    Date of Patent: December 4, 2012
    Assignee: Dow Global Technologies, LLC
    Inventors: David C. Molzahn, Kenneth A. Burdett, William L. Gibson, Karel J. Kriel, James E. McCreight, Indresh Mathur
  • Publication number: 20110060168
    Abstract: The present invention provides an improved hydrogenation processes wherein heat is efficiently managed so that catalyst productivity is optimized. More particularly, in the processes of the present invention, a nonaqueous solvent is added to a reactant to provide a nonaqueous solvent/reactant mixture that can act as a heat sink and absorb at least a portion of the heat generated within the reactor. Desirably, a reaction product, or a solvent with a minimal number of hydroxyl groups, is utilized so that the formation of unwanted byproducts can be minimized.
    Type: Application
    Filed: February 28, 2009
    Publication date: March 10, 2011
    Inventors: David C. Molzahn, Kenneth A. Burdett, William L. Gibson, Kriel J. Karel, James E. Mccreight, Indresh Mathur
  • Patent number: 7718833
    Abstract: Methods for purifying glycerin contaminated with one or more lower boiling alcohols such as methanol, ethanol, straight, branched or cyclic C3-C6 alcohols, and the like. The methods are particularly useful for purifying crude glycerin phases recovered from the synthesis of biofuels. The present invention uses distillation techniques to strip alcohol contaminants from glycerin. In contrast to conventional methods that carry out distillation either under substantially anhydrous or very wet conditions, the present invention carries out distillation in the presence of a limited amount of water, e.g., from about 0.8 to about 5 parts by weight of water per 100 parts by weight of contaminated glycerin to be purified.
    Type: Grant
    Filed: November 3, 2008
    Date of Patent: May 18, 2010
    Assignee: Johann Haltermann, Ltd.
    Inventors: Rainer Potthast, Chi Ping Chung, Indresh Mathur
  • Publication number: 20090137851
    Abstract: Methods for purifying glycerin contaminated with one or more lower boiling alcohols such as methanol, ethanol, straight, branched or cyclic C3-C6 alcohols, and the like. The methods are particularly useful for purifying crude glycerin phases recovered from the synthesis of biofuels. The present invention uses distillation techniques to strip alcohol contaminants from glycerin. In contrast to conventional methods that carry out distillation either under substantially anhydrous or very wet conditions, the present invention carries out distillation in the presence of a limited amount of water, e.g., from about 0.8 to about 5 parts by weight of water per 100 parts by weight of contaminated glycerin to be purified.
    Type: Application
    Filed: November 3, 2008
    Publication date: May 28, 2009
    Inventors: Rainer Potthast, Chi Ping Chung, Indresh Mathur
  • Patent number: 5126018
    Abstract: A method of producing sodium dithionite comprising electrolyzing a catholyte solution of sulfur dioxide in an electrolytic cell at a pH of at least about 3, the electrolytic cell having a carbonaceous cathode, is disclosed. Particularly high current efficiencies can be attained using a high surface area carbon material for the cathode. The use of a stabilizer to inhibit decomposition of the sodium dithionite to form sodium thiosulfate is also disclosed. The stabilizer is added to the catholyte and is selected from the group consisting of phosphoric acid, sodium tripolyphosphate, acid phosphates and mixtures thereof.
    Type: Grant
    Filed: March 13, 1991
    Date of Patent: June 30, 1992
    Assignee: The Dow Chemical Company
    Inventors: Kenneth J. Stutts, Mou S. Chao, Ramanathan Gopal, Indresh Mathur
  • Patent number: 4969981
    Abstract: An electrochemical cell having improved current efficiency and a method for electrochemically reacting a liquid electrolyte with a gas in an electrochemical cell. The cell has at least two electrodes separated by a cell separator wherein at least one of said electrodes is a porous, self-draining, gas diffusion electrode. In one embodiment of the invention, an electrolyte is flowed through said cell separator into a porous, self-draining electrode and simultaneously the electrode is fed with a mixture of a reactive gas and water or an electrolyte. In another embodiment of the invention in which the cell separator is an ion exchange permselective membrane, a mixture of a reactive gas and an electrolyte are fed to the porous, self-draining electrode. Preferably said porous, self-draining electrode is a cathode.
    Type: Grant
    Filed: August 25, 1989
    Date of Patent: November 13, 1990
    Assignee: H-D Tech Incorporated
    Inventors: Derek J. Rogers, Robert D. Klassen, Allan James, Indresh Mathur, Edward B. Noonan
  • Patent number: 4927509
    Abstract: A bipolar, filter press type cell is disclosed having a liquid permeable diaphragm which is particularly suited for the electrolysis of a brine solution to produce chlorine and caustic or the electrolysis of an aqueous alkali metal hydroxide to produce an aqueous alkaline hydrogen peroxide solution. The cell can include a multiplicity of cell units extending generally in a vertical as well as a horizontal direction. A porous, self-draining electrode assembly includes a current distributor in contact with a side of the electrode opposite the electrolyte active side of the electrode.
    Type: Grant
    Filed: June 4, 1986
    Date of Patent: May 22, 1990
    Assignee: H-D Tech Inc.
    Inventors: Indresh Mathur, Allan James, David Bissett
  • Patent number: 4670122
    Abstract: This invention relates to novel electrocatalyst coated electrodes and to a method for the preparation thereof for use in electrochemical cells, particularly those employing alkaline electrolytes in the anolyte compartment of the cell. The electrodes disclosed are coated with the oxides of cobalt and tungsten and are particularly suitable as anodes since the electrocatalyst coatings resist destruction by oxygen.
    Type: Grant
    Filed: May 5, 1986
    Date of Patent: June 2, 1987
    Assignee: The Dow Chemical Company
    Inventors: Indresh Mathur, Ram Gopal
  • Patent number: 4288310
    Abstract: Method of supporting a preformed membrane in an electrolytic cell, and apparatus therefor, which comprises casting in situ support plates about the open edges of the membrane.
    Type: Grant
    Filed: September 12, 1979
    Date of Patent: September 8, 1981
    Inventors: Allan R. Knight, Indresh Mathur
  • Patent number: 4246241
    Abstract: A process for selectively removing sodium sulfate and sodium hydroxide from an aqueous slurry containing sodium chloride, sodium sulfate and sodium hydroxide, which comprises contacting the slurry in a countercurrent wash step with cool water to remove sodium sulfate and sodium hydroxide therefrom.
    Type: Grant
    Filed: July 16, 1979
    Date of Patent: January 20, 1981
    Assignee: Dow Chemical Canada Limited
    Inventors: Indresh Mathur, Dale M. Bristow (nee Elley), Allan R. Knight