Patents by Inventor Graciela B. Arhancet

Graciela B. Arhancet 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).

  • Potassium glyphosate formulations
    Patent number: 7049270
    Abstract: A herbicidal composition is provided comprising an aqueous solution of N-phosphonomethylglycine, predominantly in the form of the potassium salt thereof, at a concentration of at least 300 g a.e./l of the composition; and a surfactant component in solution or stable suspension, emulsion, or dispersion in the water, comprising one or more surfactants in a total amount of about 20 to about 300 g/l of the composition, wherein the composition has a viscosity of less than about 250 centipoise at 0° C. or a Gardner color value less than 10.
    Type: Grant
    Filed: May 21, 2001
    Date of Patent: May 23, 2006
    Assignee: Monsanto Technology LLC
    Inventors: Patrick J. Lennon, Xiangyang Chen, Graciela B. Arhancet, Jeanette A. Glaenzer, Jane L. Gillespie, Jeffrey A. Graham, David Z. Becher, Daniel R. Wright, Henry E. Agbaje, Xiaodong C. Xu, William Abraham, Ronald J. Brinker, Norman R. Pallas, Al S. Wideman, Martin D. Mahoney, Susan L. Henke
  • Novel surfactants and formulations
    Publication number: 20030104943
    Abstract: A herbicidal composition is provided comprising an aqueous solution of N-phosphonomethylglycine, predominantly in the form of the potassium salt thereof, at a concentration of at least 300 g a.e./l of the composition; and a surfactant component in solution or stable suspension, emulsion, or dispersion in the water, comprising one or more surfactants in a total amount of about 20 to about 300 g/l of the composition, wherein the composition has a viscosity of less than about 250 centipoise at 0° C. or a Gardner color value less than 10.
    Type: Application
    Filed: April 26, 2002
    Publication date: June 5, 2003
    Inventors: Patrick J. Lennon, Xiangyang Chen, Graciela B. Arhancet, Jeanette A. Glaenzer, Jane L. Gillespie, Jeffrey A. Graham, David Z. Becher, Daniel R. Wright, Henry E. Agbaje, Xiaodong C. Xu, William Abraham, Ronald J. Brinker, Norman R. Pallas, Al S. Wideman, Martin D. Mahoney, Susan L. Henke
  • Compositions and methods for inhibiting vinyl aromatic monomer polymerization
    Patent number: 6024894
    Abstract: Synergistic composition and method of use are disclosed. The compositions comprise a quinone methide derivative and a hydroxylamine compound. These compositions demonstrate synergism at inhibiting the polymerization of a vinyl aromatic monomer. Preferably the quinone methide derivative is 2,6-di-tert-butyl-4-benzylidene-cyclo-2,5-dienone and the hydroxylamine compound is N,N-bis(hydroxypropyl)hydroxylamine.
    Type: Grant
    Filed: March 25, 1998
    Date of Patent: February 15, 2000
    Assignee: BetzDearborn Inc.
    Inventor: Graciela B. Arhancet
  • Compositions and methods for inhibiting fouling of vinyl monomers
    Patent number: 5951748
    Abstract: Methods and compositions for inhibiting fouling in vinyl monomers are disclosed. Alkylphosphonate esters or acids thereof are added to vinyl monomers, particularly ethylene dichloride, that are undergoing processing to inhibit fouling.
    Type: Grant
    Filed: July 29, 1998
    Date of Patent: September 14, 1999
    Assignee: BetzDearborn Inc.
    Inventor: Graciela B. Arhancet
  • Compositions and methods for inhibiting vinyl aromatic monomer polymerization
    Patent number: 5907071
    Abstract: The polymerization of vinyl aromatic monomers such as styrene is inhibited by the addition of a composition of a stable hindered nitroxyl radical and an oxime compound.
    Type: Grant
    Filed: April 21, 1998
    Date of Patent: May 25, 1999
    Assignee: BetzDearborn Inc.
    Inventor: Graciela B. Arhancet
  • Methods and compositions for inhibiting the polymerization of ethylenically unsaturated monomers
    Patent number: 5886241
    Abstract: The polymerization of an ethylenically unsaturated monomer such as isoprene, butadiene and acrylonitrile is inhibited during storage or handling thereof by the addition of a dihydroxycinnamic acid or derivative thereof.
    Type: Grant
    Filed: April 21, 1998
    Date of Patent: March 23, 1999
    Assignee: BetzDearborn Inc.
    Inventor: Graciela B. Arhancet
  • Compositions and methods for inhibiting fouling of vinyl monomers
    Patent number: 5858176
    Abstract: Methods and compositions for inhibiting fouling in vinyl monomers are disclosed. Alkylphosphonate esters or acids thereof are added to vinyl monomers, particularly ethylene dichloride, that are undergoing processing to inhibit fouling.
    Type: Grant
    Filed: April 22, 1997
    Date of Patent: January 12, 1999
    Assignee: BetzDearborn Inc.
    Inventor: Graciela B. Arhancet
  • Methods for inhibiting the polymerization of vinyl monomers
    Patent number: 5859280
    Abstract: An alpha-tocopherol is disclosed as a polymerization inhibitor effective against vinyl monomer polymerization. Alpha-tocopherol was found to inhibit polymerization of acrylonitrile and diolefines such as isoprene and butadiene. Alpha-tocopherol was found to interact synergistically with hydroquinone in inhibiting polymerization of acrylonitrile.
    Type: Grant
    Filed: July 1, 1997
    Date of Patent: January 12, 1999
    Assignee: BetzDearborn Inc.
    Inventor: Graciela B. Arhancet
  • Compositions and methods for inhibiting vinyl aromatic monomer polymerization
    Patent number: 5773674
    Abstract: The polymerization of a vinyl aromatic monomer such as styrene is inhibited by the addition of a composition of a benzoquinone derivative and a hydroxylamine compound.
    Type: Grant
    Filed: December 31, 1996
    Date of Patent: June 30, 1998
    Assignee: BetzDearborn Inc.
    Inventors: Graciela B. Arhancet, Inge K. Henrici
  • Methods for inhibiting the polymerization of ethylenically unsaturated monomers
    Patent number: 5756870
    Abstract: The polymerization of an ethylenically unsaturated monomer such as isoprene and butadiene is inhibited during storage or handling thereof by the addition of a dihydroxycinnamic acid or derivative thereof.
    Type: Grant
    Filed: May 3, 1996
    Date of Patent: May 26, 1998
    Assignee: BetzDearborn Inc.
    Inventor: Graciela B. Arhancet
  • Compositions and methods for inhibiting vinyl aromatic monomer polymerization
    Patent number: 5648574
    Abstract: Compositions and methods for inhibiting the polymerization of vinyl aromatic monomers in oxygen-free processing systems are disclosed. The compositions comprise a hydroxylamine compound, a phenylenediamine compound and a vinyl aromatic monomer. The methods comprise adding to the monomer bis-N,N'(hydroxypropyl)hydroxylamine.
    Type: Grant
    Filed: March 26, 1996
    Date of Patent: July 15, 1997
    Assignee: BetzDearborn Inc.
    Inventors: Graciela B. Arhancet, Inge K. Henrici
  • Compositions and methods for inhibiting vinyl aromatic monomer polymerization
    Patent number: 5648572
    Abstract: Compositions and methods for inhibiting vinyl aromatic monomer polymerization during processing are disclosed. The compositions comprise a dinitrosalicylic acid derivative and a hydroxylamine compound. The methods comprise adding the composition to the monomer during processing. The preferred composition comprises 3,5-dinitrosalicylic acid or 3,5-dinitrosalicylic methyl ester and bis-(hydroxypropyl)hydroxylamine.
    Type: Grant
    Filed: May 31, 1995
    Date of Patent: July 15, 1997
    Assignee: BetzDearborn Inc.
    Inventors: Graciela B. Arhancet, Inge K. Henrici, J. Frederick Martin
  • Compositions and methods for inhibiting vinyl aromatic monomer polymerization
    Patent number: 5648573
    Abstract: The polymerization of a vinyl aromatic monomer such as styrene is inhibited by the addition of a composition of a benzoquinone derivative and a hydroxylamine compound.
    Type: Grant
    Filed: June 12, 1995
    Date of Patent: July 15, 1997
    Assignee: BetzDearborn Inc.
    Inventors: Graciela B. Arhancet, Inge K. Henrici
  • Methods and compositions for inhibiting vinyl aromatic monomer polymerization
    Patent number: 5562863
    Abstract: Vinyl aromatic monomer polymerization methods utilizing a composition of 2,6-di-tert-butyl-4-methylphenol and a substituted benzoquinonediimide compound are disclosed. Preferably, the composition is employed in an amount of 1 part to 10,000 parts per million parts monomer during distillation of styrene.
    Type: Grant
    Filed: July 18, 1995
    Date of Patent: October 8, 1996
    Assignee: Betz Laboratories, Inc.
    Inventor: Graciela B. Arhancet
  • Methods and compositions for inhibiting the polymerization of dichlorobutene
    Patent number: 5538622
    Abstract: Methods and compositions for inhibiting the polymerization of crude dichlorobutene during its processing are disclosed. The methods comprise adding an effective polymerization inhibiting amount of a composition of a hydroxylamine compound and a metal deactivator compound to the dichlorobutene. The preferred hydroxylamine compound is bis-(2-hydroxypropyl)hydroxylamine and the preferred metal deactivator compound is a Mannich reaction product.
    Type: Grant
    Filed: January 17, 1995
    Date of Patent: July 23, 1996
    Assignee: Betz Laboratories, Inc.
    Inventor: Graciela B. Arhancet
  • Methods for inhibiting vinyl aromatic monomer polymerization
    Patent number: 5510547
    Abstract: Methods for inhibiting the polymerization of vinyl aromatic monomers in oxygen-free processing systems are disclosed. The methods comprise adding from 1 to 10,000 parts of a combination of a hydroxylamine compound and a phenylenediamine compound to the vinyl aromatic monomer.
    Type: Grant
    Filed: February 3, 1995
    Date of Patent: April 23, 1996
    Assignee: Betz Laboratories, Inc.
    Inventors: Graciela B. Arhancet, Inge K. Henrici
  • Compositions and methods for inhibiting vinyl aromatic monomer polymerization
    Patent number: 5489718
    Abstract: Compositions and methods for inhibiting polymerization of vinyl aromatic monomers in oxygen-free processing systems are disclosed. The compositions comprise an oxime compound and a hydroxylamine compound and, alternatively, an oxime compound, a hydroxylamine compound and a phenylenediamine compound. The methods comprise adding either of the compositions to the vinyl aromatic monomer in an amount ranging from 1 to about 10,000 parts per million parts monomer.
    Type: Grant
    Filed: February 23, 1995
    Date of Patent: February 6, 1996
    Assignee: Betz Laboratories, Inc.
    Inventor: Graciela B. Arhancet
  • Methods for inhibiting vinyl aromatic monomer polymerization
    Patent number: 5489720
    Abstract: An improved method for inhibiting the polymerization of vinyl aromatic monomer with a hydroxylamine compound is disclosed. The improvement provides for adding a catalytic amount of a phenylenediamine compound to the vinyl aromatic system while replacing any phenylenediamine compound lost as a result of physical removal from the system via the waste stream.
    Type: Grant
    Filed: June 30, 1994
    Date of Patent: February 6, 1996
    Assignee: Betz Laboratories, Inc.
    Inventor: Graciela B. Arhancet
  • Method for inhibiting vinyl aromatic monomer polymerization
    Patent number: 5470440
    Abstract: Vinyl aromatic monomer polymerization methods utilizing a composition of 2,6-di-tert-butyl-4-methylphenol and a substituted benzoquinonediimide compound are disclosed. Preferably, the composition is employed in an amount of 1 part to 10,000 parts per million parts monomer during distillation of styrene.
    Type: Grant
    Filed: April 19, 1994
    Date of Patent: November 28, 1995
    Assignee: Betz Laboratories, Inc.
    Inventor: Graciela B. Arhancet
  • Methods for inhibiting vinyl aromatic monomer polymerization
    Patent number: 5446220
    Abstract: Methods for inhibiting the polymerization of vinyl aromatic monomers in oxygen-free processing systems are disclosed. These methods comprise adding from 1 to about 10,000 parts per million parts monomer of a combination of a dinitrophenol compound, a hydroxylamine compound and a phenylenediamine compound. Preferably, 2-sec-butyl-4,6-dinitrophenol or 4,6-dinitro-o-cresol are used in combination with bis-(hydroxypropyl)hydroxylamine and N,N' -di-sec-butyl-p-phenylenediamine.
    Type: Grant
    Filed: August 24, 1994
    Date of Patent: August 29, 1995
    Assignee: Betz Laboratories, Inc.
    Inventor: Graciela B. Arhancet