Patents by Inventor Edgar F. Hoy

Edgar F. Hoy 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).

  • Patent number: 5418271
    Abstract: Coating formulations which behave as elastic solids having reversible stress-induced fluidity are prepared by creating a fluid having distributed therein effective amounts of ionic charge sites and countercharge sites. For instance, elastic solids having reversible stress-induced fluidity are prepared by combining liquid formulations with a dispersion of a small, but effective, amount of at least one crystalline mixed metal hydroxide conforming substantially to the formulaLi.sub.m D.sub.d T(OH).sub.(m+2d+3+n.multidot.a) (A.sup.n).sub.a .multidot.xH.sub.2 Owhere m is zero to one, D is a divalent metal, d is from zero to 4, T is a trivalent metal, A represents at least one anion or negative-valence radical of valence n and a is the amount of A, where n is 1 or more, (m+2d+3+n.multidot.a) is equal to or greater than 3, (m+d) is greater than zero, and xH.sub.2 O represents excess waters of hydration, if any.
    Type: Grant
    Filed: October 11, 1991
    Date of Patent: May 23, 1995
    Assignee: The Dow Chemical Company
    Inventors: John L. Burba, III, Peter A. Doty, Christopher P. Christenson, Susan K. Falcone, Andrea H. Hazlitt, Thomas M. Knobel, Wilfred C. Meyer, Arthur E. Read, Jr., Edgar F. Hoy, Avis L. McCrary, Ha Q. Pham, Stanley F. Simpson, Steve A. Sims, Betty J. Smith
  • Patent number: 5232627
    Abstract: Adducts of clay, especially of the smectite variety, most especially bentonite, are prepared with an effective amount of at least one activated mixed metal oxide or oxy-hydroxide (AHMMO) formed by dehydrating hydrotalcite or a mixture comprising magnesium oxide and aluminum oxide, or a crystalline mixed metal hydroxide conforming substantially to the formulaLi.sub.m D.sub.d T(OH).sub.(m+2d+3+n.a) (A.sup.n).sub.a. xH.sub.2 Owhere m is zero to one, D is a divalent metal, d is from zero to 4, T is a trivalent metal, A represents at least one anion or negative-valence radical of valence n, where n is 1 or more, (m+2d+3+n.a) is equal to or greater than 3, (m+d) is greater than zero, and xH.sub.2 O represents excess waters of hydration. These adducts are useful, e.g., in drilling muds and in viscosity modification of a wide variety of fluids.
    Type: Grant
    Filed: April 16, 1991
    Date of Patent: August 3, 1993
    Assignee: The Dow Chemical Company
    Inventors: John L. Burba, III, Arthur E. Read, Jr., Edgar F. Hoy
  • Patent number: 4971775
    Abstract: A method for removing iron(III), copper(II), zinc(I) and nickel(II) from an effluent containing chelant (EDTA, DEPA, HOEDTA) comprising treating the effluent with a soluble calcium compound (e.g., Ca(OH).sub.2) CaCl.sub.2, Ca(NO.sub.3).sub.2) in a molar equivalent to the chelant in combination with a monovalent hydroxide to a pH greater than 12.4 and then adding an effective amount of a dialkyldithiocarbamate (e.g.; sodium-N,N-diethyldithiocarbamate) to precipitate the metal hydroxides and nickel dialkyldithiocarbamate. Heating the solution to about 180 F. further speeds up the removal of the nickel(II). The nickel concentration of spent chelant cleaning solution can be reduced to less than 1 ppm.
    Type: Grant
    Filed: June 30, 1987
    Date of Patent: November 20, 1990
    Assignee: Dowell Schlumberger
    Inventors: Edgar F. Hoy, Stanley B. McConnell
  • Patent number: 4861386
    Abstract: There is disclosed a method and additive to be employed in said method whereby the fouling of metal surfaces with copper deposits resulting from acid cleaning of copper alloy surfaces, be they all of the same metallurgy or merely elements with in the overall system is markedly reduced by adding to the rinse or flush formulations commonly employed following an acid treatment, a chelating agent for copper, and, subsequently adding a copper corrosion inhibitor to the conventional neutralization fluid.
    Type: Grant
    Filed: November 9, 1988
    Date of Patent: August 29, 1989
    Assignee: Dowell Schlumberger Incorporated
    Inventor: Edgar F. Hoy
  • Patent number: 4154767
    Abstract: Reaction of the diphenyl ether with formaldehyde, an alcohol, water and acid catalyst produces a mixture of condensation products that can be cured to useful, thermally stable resins. These condensation products are also useful as functional fluids in capacitors and other electrical devices.
    Type: Grant
    Filed: March 7, 1977
    Date of Patent: May 15, 1979
    Assignee: The Dow Chemical Company
    Inventors: Raymond A. Plepys, Edgar F. Hoy
  • Patent number: 3940448
    Abstract: A condensation product being a co-generic mixture of products having the formulaeR.sub.1 -- A -- CH.sub.2 --OCH.sub.2 --.sub.y A --.sub.x CH.sub.2 --OCH.sub.2 --.sub.y R.sub.3 (I)wherein each A is an independently selected aromatic radical having the formula ##SPC1##Each R.sub.1 represents an independently selected radical from the group consisting of hydrogen, --CH.sub.2 --OCH.sub.2 --.sub.y R.sub.3 ; each R.sub.2 represents an independently selected radical consisting of R.sub.1, halogen or an alkyl group of 1 to 10 carbon atoms; R.sub.3 represents a radical selected from the group consisting of hydrogen, methoxy, ethoxy, propoxy or --A--H when y is 1 or greater than 1 and methoxy, ethoxy, propoxy and --A--H when y is 0; x represents an integer from 0 to 60; y represents an integer from 0 to 4; z represents an integer from 0 to 2; and, B represents oxygen or sulfur. It is to be understood that unreacted aromatic HAH may be present in amounts up to 50% by weight of the total condensation product.
    Type: Grant
    Filed: February 25, 1974
    Date of Patent: February 24, 1976
    Assignee: The Dow Chemical Company
    Inventor: Edgar F. Hoy