Patents by Inventor Patricia Lopez-Maldonado

Patricia Lopez-Maldonado 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).

  • Isomerization of epoxyalkenes to 2,5-dihydrofurans
    Patent number: 6201138
    Abstract: Disclosed are processes for the isoberization of epoxyalkenes to dihydrofurans by contacting an epovyalkene with a catalyst comprising a quaternary organic onium iodide compounds, optionally deposited on a non-acidic support and/or in combination with a Lewis acid co-catalyst. The catalyst may comprise a supported catalyst, an unsupported catalyst or a solution of the catalytically-active components in an inert, organic solvent.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: March 13, 2001
    Assignee: Eastman Chemical Company
    Inventors: John Robert Monnier, Stephen Neal Falling, Patricia Lopez-Maldonado
  • Isomerization of epoxyalkenes to 2,5-dihydrofurans
    Patent number: 6201139
    Abstract: Disclosed are processes for the isomerization of epoxyalkenes to dihydrofurans by contacting an epoxyalkene with a catalyst comprising a quaternary organic onium iodide compounds, optionally deposited on a non-acidic support and/or in combination with a Lewis acid co-catalyst. The catalyst may comprise a supported catalyst, an unsupported catalyst or a solution of the catalytically-active components in an inert, organic solvent.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: March 13, 2001
    Assignee: Eastman Chemical Company
    Inventors: Stephen Neal Falling, Patricia Lopez-Maldonado
  • Polyether polymers derived from 3,4-epoxy-1-butene and hydroxyl initiator
    Patent number: 5652328
    Abstract: Disclosed are novel polyether compounds obtained by the reaction or polymerization of 3,4-epoxy-1-butene in the presence of an onium iodide compound such as an ammonium or phosphonium iodide, an organotin compound such as a trihydrocarbyltin iodide, and a nucleophilic initiator compound. The polyether compounds comprise n units of residue (1) and m units of residue (2), wherein the total value of n+m is 2 to 70, m/(n+m) is greater than 0.75 and up to 0.
    Type: Grant
    Filed: August 17, 1995
    Date of Patent: July 29, 1997
    Assignee: Eastman Chemical Company
    Inventors: Stephen N. Falling, Stephen A. Godleski, Patricia Lopez-Maldonado, Peter B. MacKenzie, Laughlin G. McCullough, James C. Matayabas, Jr.
  • Polyether polymers derived from 3,4-epoxy-1-butene
    Patent number: 5608034
    Abstract: Polyether polymers obtained by the reaction or polymerization of 3,4-epoxy-1-butene in the presence of an onium iodide compound such as an ammonium or phosphonium iodide, an organotin compound such as a trihydrocarbyltin iodide, and a nucleophilic hydroxyl initiator compound. The polyether polymers comprise n units of residue (1) and m units of residue (2), wherein the total value of n+m is 2 to 70, m/(n+m) is greater than 0.75 and up to 0.
    Type: Grant
    Filed: September 22, 1995
    Date of Patent: March 4, 1997
    Assignee: Eastman Chemical Company
    Inventors: Stephen N. Falling, Stephen A. Godleski, Patricia Lopez-Maldonado, Peter B. MacKenzie, Laughlin G. McCullough, James C. Matayabas, Jr.
  • Process for the preparation of 3,4-dihalo-1,2-epoxybutanes from 3,4-epoxy-1-butene
    Patent number: 5264595
    Abstract: Disclosed is a process for the preparation of 3,4-dichloro and 3,4-dibromo-1,2-epoxybutane by the reaction of 3,4-epoxy-1-butene with chlorine or bromine in the presence of a catalytic amount of a tertiary amine or a hydrohalide of a primary, secondary or tertiary amine. The reaction preferably is carried out by the addition of 3,4-epoxy-1-butene and chlorine or bromine to an organic, halogenation solvent containing chlorine or bromine and tertiary amine or amine hydrohalide catalyst.
    Type: Grant
    Filed: April 5, 1993
    Date of Patent: November 23, 1993
    Assignee: Eastman Kodak Company
    Inventors: Stephen N. Falling, Patricia Lopez-Maldonado
  • Process for the preparation of 3,4-dihalo-1,2-epoxybutanes
    Patent number: 5103028
    Abstract: Disclosed is a process for the preparation of 3,4-dichloro- and 3,4-dibromo-1,2-epoxybutane by the reaction of 3,4-epoxy-1-butane with chlorine or bromine in the presence of a quaternary ammonium or phosphonium halide compound. The reaction preferably is carried out by the addition of 3,4-epoxy-1-butane and chlorine or bromine to an organic, halogenation solvent containing chlorine or bromine and the quaternary compound.
    Type: Grant
    Filed: September 9, 1991
    Date of Patent: April 7, 1992
    Assignee: Eastman Kodak Company
    Inventors: Stephen N. Falling, Patricia Lopez-Maldonado