Patents by Inventor Douglas Berti

Douglas Berti 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).

  • Publication number: 20070135529
    Abstract: It has been discovered that improved polystyrene products may be obtained by polymerizing styrene in the presence of at least one multifunctional initiator that is trifunctional or tetrafunctional and at least one lower functionality initiator that is difunctional or monofunctional. These polymers may have increased Mz, increased MFI, and increased MWD. Optionally the resin may include at least one chain transfer agent, at least one cross-linking agent and/or a styrene-conjugated diene-styrene block copolymer. The presence of the multifunctional initiator tends to cause more branched structures in the polystyrene.
    Type: Application
    Filed: January 17, 2007
    Publication date: June 14, 2007
    Applicant: Fina Technology, Inc.
    Inventors: Douglas Berti, Jose Sosa, Jay Reimers
  • Publication number: 20050256216
    Abstract: It has been discovered that improved polystyrene products may be obtained by polymerizing styrene in the presence of at least one multifunctional initiator that is trifunctional or tetrafunctional and at least one lower functionality initiator that is difunctional or monofunctional. These polymers may have increased Mz, increased MFI, and increased MWD. Optionally the resin may include at least one chain transfer agent, at least one cross-linking agent and/or a styrene-conjugated diene-styrene block copolymer. The presence of the multifunctional initiator tends to cause more branched structures in the polystyrene.
    Type: Application
    Filed: May 14, 2004
    Publication date: November 17, 2005
    Inventors: Douglas Berti, Jose Sosa, Jay Reimers
  • Patent number: 6471865
    Abstract: The present invention provides a solvent exchange column for continuously exchanging styrene monomer with the solvent used to produce polybutadiene and a method of use therefor. The solvent exchange column includes an exchange plate support structure coupled to and supporting spaced apart exchange plates, wherein each of the exchange plates has holes located therein to allow a passage of fluid therethrough. The solvent exchange column further includes a vapor ventilation system for allowing the volatized solvent to exit the solvent exchange column.
    Type: Grant
    Filed: October 25, 2000
    Date of Patent: October 29, 2002
    Assignee: Fina Technology, Inc.
    Inventors: J. Todd Reaves, Aron T. Griffith, Jose M. Sosa, Douglas Berti, Brad Klussmann