Patents by Inventor Mark Vandersall

Mark Vandersall 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).

  • Method of catalysis for the production of bisphenol A
    Patent number: 10894758
    Abstract: Provided is a process for producing 2,2-bis(4-hydroxyphenyl)propane, comprising condensing phenol with acetone in the presence of an acid catalyst; wherein the acid catalyst comprises a collection of sulfonated polymeric beads, wherein the sulfonated polymeric beads comprise (i) 75 to 99% by weight, based on the weight of the bead, polymerized units of monofunctional vinyl monomer, and (ii) 1 to 25% by weight, based on the weight of the bead, polymerized units of multifunctional vinyl monomer; wherein 90% or more of the beads by volume are uniform beads.
    Type: Grant
    Filed: October 24, 2018
    Date of Patent: January 19, 2021
    Assignees: DDP SPECIALTY ELECTRONIC MATERIALS US, INC., DDP SPECIALTY ELECTRONS MATERIALS US 8, LLC
    Inventors: Andrew M. Savo, Mark Vandersall, Klaus-Dieter Topp, Liu Yang
  • METHOD OF CATALYSIS
    Publication number: 20200339493
    Abstract: Provided is a process for producing 2,2-bis(4-hydroxyphenyl)propane, comprising condensing phenol with acetone in the presence of an acid catalyst; wherein the acid catalyst comprises a collection of sulfonated polymeric beads, wherein the sulfonated polymeric beads comprise (i) 75 to 99% by weight, based on the weight of the bead, polymerized units of monofunctional vinyl monomer, and (ii) 1 to 25% by weight, based on the weight of the bead, polymerized units of multifunctional vinyl monomer; wherein 90% or more of the beads by volume are uniform beads.
    Type: Application
    Filed: October 24, 2018
    Publication date: October 29, 2020
    Inventors: Andrew M. Savo, Mark Vandersall, Klaus-Dieter Topp, Liu Yang
  • METHOD FOR INHIBITING POLYMERIZATION OF (METH) ACRYLIC ACID AND ITS ESTERS USING AN INHIBITOR AND A PROCESS FOR MAKING A COMPOUND USEFUL AS SUCH AN INHIBITOR
    Publication number: 20070197785
    Abstract: This invention relates to a method for inhibiting polymerization of (meth)acrylic acid and its esters using a polymerization inhibitor which comprises at least one reduced halide-content azine dye-based compound. A process for producing reduced halide-content azine dye-based compounds using ion exchange resin technology is also provided.
    Type: Application
    Filed: April 5, 2007
    Publication date: August 23, 2007
    Inventors: Stephen Bass, Robert Mason, Joy Mendoza, Steven Skoog, Mark Vandersall
  • Method for inhibiting polymerization of (meth)acrylic acid and its esters using an inhibitor and a process for making a compound useful as such an inhibitor
    Publication number: 20060074257
    Abstract: This invention relates to a method for inhibiting polymerization of (meth)acrylic acid and its esters using a polymerization inhibitor which comprises at least one reduced halide-content azine dye-based compound. A process for producing reduced halide-content azine dye-based compounds using ion exchange resin technology is also provided.
    Type: Application
    Filed: September 19, 2005
    Publication date: April 6, 2006
    Inventors: Stephen Bass, Robert Mason, Joy Mendoza, Steven Skoog, Mark Vandersall