Patents by Inventor Audrey L. Barnes

Audrey L. Barnes 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).

  • Mixed metal layered hydroxide hydrophilic organic material as thickeners for water and other hydrophylic fluids
    Patent number: 5308547
    Abstract: Novel compositions useful as fluid gelling agents, especially for use in subterranean applications such as drilling fluids, are prepared by reacting an aqueous dispersion of a clay, such as bentonite, with an aqueous gel of a monodispersed mixed metal layered hydroxide of the formula Li.sub.m D.sub.d T(OH).sub.(m+2d+3+na) A.sub.a.sup.n, where D is a divalent metal, such as Mg, T is a trivalent metal, such as Al, and A represents other monovalent or polyvalent anions, the formula being described in detail in the disclosure.
    Type: Grant
    Filed: November 15, 1991
    Date of Patent: May 3, 1994
    Assignee: The Dow Chemical Company
    Inventors: John L. Burba, III, Audrey L. Barnes
  • Mixed metal hydroxide-clay adducts as thickeners for water and other hydrophylic fluids
    Patent number: 5196143
    Abstract: Novel compositions useful as fluid gelling agents, especially for use in subterranean applications such as drilling fluids, are prepared by reacting an aqueous dispersion of a clay, such as bentonite, with an aqueous gel of a monodispersed mixed metal layered hydroxide of the formula Li.sub.m D.sub.d T(OH).sub.(m+2d+3+na) A.sup.n.sub.a.H.sub.2 O, where x is zero or more representing excess water of hydration, where D is a divalent metal, such as Mg, T is a trivalent metal, such as Al, and A represents other monovalent or polyvalent anions, the formula being described in detail in the disclosure.
    Type: Grant
    Filed: May 10, 1991
    Date of Patent: March 23, 1993
    Assignee: The Dow Chemical Company
    Inventors: John L. Burba, III, Audrey L. Barnes
  • Mixed metal hydroxide containing a dispersant
    Patent number: 5094778
    Abstract: Novel compositions useful as fluid gelling agents, especially for use in subterranean applications such as drilling fluids, are prepared by reacting an aqueous dispersion of a clay, such as bentonite, with an aqueous gel of a monodispersed mixed metal layered hydroxide of the formula Li.sub.m D.sub.d T(OH).sub.(m+2d+3+na) A.sub.J.sup.n where D is a divalent metal, such as Mg, T is a trivalent metal, such as Al, and A represents other monovalent or polyvalent anions, the formula being described in detail in the disclosure.
    Type: Grant
    Filed: May 16, 1990
    Date of Patent: March 10, 1992
    Assignee: The Dow Chemical Company
    Inventors: John L. Burba, III, Audrey L. Barnes
  • Mixed metal hydroxide-clay adducts as thickeners for water and other hydrophylic fluids
    Patent number: 4790954
    Abstract: Novel compositions useful as fluid gelling agents, especially for use in subterranean applications such as drilling fluids, are prepared by reacting an aqueous dispersion of a clay, such as bentonite, with an aqueous gel of a monodispersed mixed metal layered hydroxide of the formula Li.sub.m D.sub.d T(OH).sub.(m+2d+3+na) A.sub.a.sup.n, where D is a divalent metal, such as Mg, T is a trivalent metal, such as Al, and A represents other monovalent or polyvalent anions, the formula being described in detail in the disclosure.
    Type: Grant
    Filed: May 7, 1987
    Date of Patent: December 13, 1988
    Assignee: The Dow Chemical Company
    Inventors: John L. Burba, III, Audrey L. Barnes
  • Mixed metal layered hydroxide-clay adducts as thickeners for water and other hydrophylic fluids
    Patent number: 4664843
    Abstract: Novel compositions useful as fluid gelling agents, especially for use in subterranean applications such as drilling fluids, are prepared by reacting an aqueous dispersion of a clay, such as bentonite, with an aqueous gel of a monodispersed mixed metal layered hydroxide of the formula Li.sub.m D.sub.d T(OH).sub.m+2d+3+na) A.sub.a.sup.n, where D is a divalent metal, such as Mg, T is a trivalent metal, such as Al, and A represents other monovalent or polyvalent anions, the formula being described in detail in the disclosure.
    Type: Grant
    Filed: July 5, 1985
    Date of Patent: May 12, 1987
    Assignee: The Dow Chemical Company
    Inventors: John L. Burba, III, Audrey L. Barnes