Patents by Inventor Robin S. Eichen Conn

Robin S. Eichen Conn 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).

  • Melt-stable lactide polymer nonwoven fabric and process for manufacture thereof
    Patent number: 6355772
    Abstract: A nonwoven fabric comprised of a lactide polymer. The lactide polymer comprises a plurality of poly(lactide) polymer chains, residual lactide in concentration of less than about 2 percent and water in concentration of less than about 2000 parts-per-million. A process for manufacturing a nonwoven fabric with the lactide polymer composition is also disclosed.
    Type: Grant
    Filed: May 9, 2000
    Date of Patent: March 12, 2002
    Assignee: Cargill, Incorporated
    Inventors: Patrick R. Gruber, Jeffrey J. Kolstad, Christopher M. Ryan, Robin S. Eichen Conn, Eric S. Hall
  • Melt-stable lactide polymer nonwoven fabric and process for manufacture thereof
    Patent number: 6111060
    Abstract: A nonwoven fabric comprised of a lactide polymer. The lactide polymer comprises a plurality of poly(lactide) polymer chains, residual lactide in concentration of less than about 2 percent and water in concentration of less than about 2000 parts-per-million. A process for manufacturing a nonwoven fabric with the lactide polymer composition is also disclosed.
    Type: Grant
    Filed: January 2, 1998
    Date of Patent: August 29, 2000
    Assignee: Cargill, Incorporated
    Inventors: Patrick R. Gruber, Jeffrey J. Kolstad, Christopher M. Ryan, Robin S. Eichen Conn, Eric S. Hall
  • Melt-stable amorphous lactide polymer film and process for manufacture thereof
    Patent number: 5585191
    Abstract: An amorphous film comprised of a lactide polymer. The lactide polymer comprises a plurality of poly(lactide) polymer chains, residual lactide in concentration of less than about 2 percent and water in concentration of less than about 2000 parts-per-million. A process for manufacturing an amorphous film with the lactide polymer composition is also disclosed.
    Type: Grant
    Filed: September 13, 1995
    Date of Patent: December 17, 1996
    Assignee: Cargill, Incorporated
    Inventors: Patrick R. Gruber, Jeffrey J. Kolstad, Christopher M. Ryan, Eric S. Hall, Robin S. Eichen Conn
  • Melt-stable lactide polymer composition and process for manufacture thereof
    Patent number: 5539081
    Abstract: A lactide polymer composition combining compositional and purity limitations and catalyst optimization or addition of stabilizing agents resulting in a melt-stable polymer is disclosed. The melt-stable lactide polymer comprises a plurality of polylactide polymer chains, residual lactide in concentration of less than 2 percent and water in concentration of less than 1000 parts-per-million. A stabilizing agent in an amount sufficient to reduce depolymerization of the lactide polymer during melt-processing or alternatively, control of catalyst level at a molar ratio of monomer to catalyst greater than 3000:1 is also included in the melt-stable composition. A process for manufacture of a melt-stable lactide polymer composition includes polymerizing a lactide mixture and adding stabilizing agents sufficient to reduce depolymerization of the polylactide during melt-processing, followed by devolatilizing the polylactide to remove monomer and water.
    Type: Grant
    Filed: May 22, 1995
    Date of Patent: July 23, 1996
    Assignee: Cargill, Incorporated
    Inventors: Patrick R. Gruber, Jeffrey J. Kolstad, Eric S. Hall, Robin S. Eichen Conn, Christopher M. Ryan
  • Melt-stable lactide polymer nonwoven fabric and process for manufacture thereof
    Patent number: 5525706
    Abstract: A nonwoven fabric comprised of a lactide polymer. The lactide polymer comprises a plurality of poly(lactide) polymer chains, residual lactide in concentration of less than about 2 percent and water in concentration of less than about 2000 parts-per-million. A process for manufacturing a nonwoven fabric with the lactide polymer composition is also disclosed.
    Type: Grant
    Filed: October 25, 1994
    Date of Patent: June 11, 1996
    Assignee: Cargill, Incorporated
    Inventors: Patrick R. Gruber, Jeffrey J. Kolstad, Christopher M. Ryan, Eric S. Hall, Robin S. Eichen Conn
  • Melt-stable amorphous lactide polymer film and process for manufacturing thereof
    Patent number: 5484881
    Abstract: An amorphous film comprised of a lactide polymer. The lactide polymer comprises a plurality of poly(lactide) polymer chains, residual lactide in concentration of less than about 2 percent and water in concentration of less than about 2000 parts-per-million. A process for manufacturing an amorphous film with the lactide polymer composition is also disclosed.
    Type: Grant
    Filed: August 23, 1993
    Date of Patent: January 16, 1996
    Assignee: Cargill, Inc.
    Inventors: Patrick R. Gruber, Jeffrey J. Kolstad, Christopher M. Ryan, Eric S. Hall, Robin S. Eichen Conn
  • Paper having a melt-stable lactide polymer coating and process for manufacture thereof
    Patent number: 5475080
    Abstract: A lactide polymer coating resulting in a strong, repulpable, high gloss, paper coating. The lactide polymer comprises a plurality of poly(lactide) polymer chains, residual lactide in concentration of less than about 5 percent and water in concentration of less than about 2000 parts-per-million. A process for coating paper with the lactide polymer composition is also disclosed.
    Type: Grant
    Filed: March 22, 1993
    Date of Patent: December 12, 1995
    Assignee: Cargill, Incorporated
    Inventors: Patrick R. Gruber, Jeffrey J. Kolstad, Christopher M. Ryan, Eric S. Hall, Robin S. Eichen Conn
  • Hydroxyl-terminated lactide polymer composition
    Patent number: 5446123
    Abstract: A lactide polymer composition combining compositional and purity limitations and catalyst optimization or addition of stabilizing agents resulting in a melt-stable polymer is disclosed. The melt-stable lactide polymer comprises a plurality of polylactide polymer chains, residual lactide in concentration of less than 2 percent and water in concentration of less than 1000 parts-per-million. A stabilizing agent in an amount sufficient to reduce depolymerization of the lactide polymer during melt-processing or alternatively, control of catalyst level at a molar ratio of monomer to catalyst greater than 3000:1 is also included in the melt-stable composition. A process for manufacture of a melt-stable lactide polymer composition includes polymerizing a lactide mixture and adding stabilizing agents sufficient to reduce depolymerization of the polylactide during melt-processing, followed by devolatilizing the polylactide to remove monomer and water.
    Type: Grant
    Filed: April 25, 1994
    Date of Patent: August 29, 1995
    Assignee: Cargill, Incorporated
    Inventors: Patrick R. Gruber, Jeffrey J. Kolstad, Eric S. Hall, Robin S. Eichen Conn, Christopher M. Ryan
  • Melt-stable lactide polymer composition and process for manufacture thereof
    Patent number: 5338822
    Abstract: A lactide polymer composition combining compositional and purity limitations and catalyst optimization or addition of stabilizing agents resulting in a melt-stable polymer is disclosed. The melt-stable lactide polymer comprises a plurality of polylactide polymer chains, residual lactide in concentration of less than 2 percent and water in concentration of less than 1000 parts-per-million. A stabilizing agent in an amount sufficient to reduce depolymerization of the lactide polymer during melt-processing or alternatively, control of catalyst level at a molar ratio of monomer to catalyst greater than 3000:1 is also included in the melt-stable composition. A process for manufacture of a melt-stable lactide polymer composition includes polymerizing a lactide mixture and adding stabilizing agents sufficient to reduce depolymerization of the polylactide during melt-processing, followed by devolatilizing the polylactide to remove monomer and water.
    Type: Grant
    Filed: October 2, 1992
    Date of Patent: August 16, 1994
    Assignee: Cargill, Incorporated
    Inventors: Patrick R. Gruber, Jeffrey J. Kolstad, Eric S. Hall, Robin S. Eichen Conn, Christopher M. Ryan