Patents by Inventor Ralph C. Gatrone

Ralph C. Gatrone 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).

  • Grafted methylenediphosphonate ion exchange resins
    Patent number: 5712347
    Abstract: An ion exchange resin is disclosed that is comprised of an insoluble copolymer onto which are grafted pendent groups that provide 1.0 to about 10 mmol/g dry weight phosphorous. The pendent groups have the formula ##STR1## wherein R is hydrogen, a cation or mixtures thereof; and R.sup.1 is hydrogen or an C.sub.1 -C.sub.2 alkyl group. The resin also contains zero to about 5 mmol/g dry weight of pendent aromatic sulfonate groups. Processes for making and using an ion exchange-resin are also disclosed.
    Type: Grant
    Filed: April 3, 1997
    Date of Patent: January 27, 1998
    Assignees: ARCH Development Corp., University of Tennessee Research Corp.
    Inventors: Andrzej W. Trochimcznk, Ralph C. Gatrone, Spiro Alexandratos, E. Philip Horwitz
  • Grafted methylenediphosphonate ion exchange resins
    Patent number: 5618851
    Abstract: An ion exchange resin is disclosed that is comprised of an insoluble copolymer onto which are grafted pendent groups that provide 1.0 to about 10 mmol/g dry weight phosphorous. The pendent groups have the formula ##STR1## wherein R is hydrogen, a cation or mixtures thereof; andR.sup.1 is hydrogen or an C.sub.1 -C.sub.2 alkyl group. The resin also contains zero to about 5 mmol/g dry weight of pendent aromatic sulfonate groups. Processes for making and using an ion exchange resin are also disclosed.
    Type: Grant
    Filed: February 6, 1995
    Date of Patent: April 8, 1997
    Assignees: Arch Development Corp., The University of Tennessee Research Corp.
    Inventors: Andrzej W. Trochimcznk, Ralph C. Gatrone, Spiro Alexandratos, E. Philip Horwitz
  • Phosphonic acid based ion exchange resins
    Patent number: 5539003
    Abstract: An ion exchange resin for extracting metal ions from a liquid waste stream. An ion exchange resin is prepared by copolymerizing a vinylidene diphosphonic acid with styrene, acrylonitrile and divinylbenzene.
    Type: Grant
    Filed: April 25, 1995
    Date of Patent: July 23, 1996
    Assignees: University of Tennessee Research Corporation, Arch Development Corporation
    Inventors: E. Philip Horwitz, Spiro D. Alexandratos, Ralph C. Gatrone, Ronato Chiarizia
  • Phosphonic acid based exchange resins
    Patent number: 5449462
    Abstract: An ion exchange resin for extracting metal ions from a liquid waste stream. An ion exchange resin is prepared by copolymerizing a vinylidene diphosphonic acid with styrene, acrylonitrile and divinylbenzene.
    Type: Grant
    Filed: January 21, 1994
    Date of Patent: September 12, 1995
    Assignees: Arch Development Corp., University of Tennessee Research Corporation
    Inventors: E. Philip Horwitz, Spiro D. Alexandratos, Ralph C. Gatrone, Ronato Chiarizia
  • Extracting metal ions with diphosphonic acid, or derivative thereof
    Patent number: 5332531
    Abstract: Thermodynamically-unstable complexing agents which are diphosphonic acids and diphosphonic acid derivatives (or sulphur containing analogs), like carboxyhydroxymethanediphosphonic acid and vinylidene-1,1-diphosphonic acid, are capable of complexing with metal ions, and especially metal ions in the II, III, IV, V and VI oxidation states, to form stable, water-soluble metal ion complexes in moderately alkaline to highly-acidic media. However, the complexing agents can be decomposed, under mild conditions, into non-organic compounds which, for many purposes are environmentally-nondamaging compounds thereby degrading the complex and releasing the metal ion for disposal or recovery. Uses for such complexing agents as well as methods for their manufacture are also described.
    Type: Grant
    Filed: June 10, 1992
    Date of Patent: July 26, 1994
    Assignee: Arch Development Corporation
    Inventors: Earl P. Horwitz, Ralph C. Gatrone, Kenneth L. Nash
  • Phosphonic acid based ion exchange resins
    Patent number: 5281631
    Abstract: An ion exchange resin for extracting metal ions from a liquid waste stream. An ion exchange resin is prepared by copolymerizing a vinylidene disphosphonic acid with styrene, acrylonitrile and divinylbenzene.
    Type: Grant
    Filed: December 20, 1991
    Date of Patent: January 25, 1994
    Assignee: Arch Development Corp.
    Inventors: E. Philip Horwitz, Spiro D. Alexandratos, Ralph C. Gatrone, Ronato Chiarizia
  • Method of purifying neutral organophosphorus extractants
    Patent number: 4741857
    Abstract: A method for removing acidic contaminants from neutral mono and bifunctional organophosphorous extractants by contacting the extractant with a macroporous cation exchange resin in the H.sup.+ state followed by contact with a macroporous anion exchange resin in the OH.sup.- state, whereupon the resins take up the acidic contaminants from the extractant, purifying the extractant and improving its extraction capability.
    Type: Grant
    Filed: October 6, 1986
    Date of Patent: May 3, 1988
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: E. Philip Horwitz, Ralph C. Gatrone, Renato Chiarizia
  • Urease inhibited urea based fertilizer compositions containing organo boron acid compounds
    Patent number: 4462819
    Abstract: The invention relates to novel urease inhibited fertilizer compositions containing urea and a urease inhibiting amount of one or more organo boron acid compounds, and to a method and composition for inhibiting the catalytic activity of urease through use of such compounds.
    Type: Grant
    Filed: April 7, 1983
    Date of Patent: July 31, 1984
    Assignee: Allied Corporation
    Inventors: Michael Van Der Puy, Ralph C. Gatrone, Martin A. Robinson, Larry L. Hendrickson