Patents by Inventor Daniel J. LaPrairie

Daniel J. LaPrairie 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).

  • PROCESS FOR THE PREPARATION OF ALKYLENE GLYCOLS
    Publication number: 20030013929
    Abstract: The present invention relates to a catalytic process for the preparation of alkylene glycols from alkylene oxide and water. Further, the invention relates to a method of preservation of catalysts in alkylene oxide containing systems. More in particular, it has been found that particular acids have a positive effect on the lifetime of catalyst systems based on anion exchange resins, and particularly those in the bicarbonate form.
    Type: Application
    Filed: April 9, 2002
    Publication date: January 16, 2003
    Inventors: Gary R. Strickler, Guo-Shuh J. Lee, William J. Rievert, Daniel J. LaPrairie, Edward E. Timm
  • Process for the preparation of alkylene glycols
    Patent number: 6479715
    Abstract: The present invention relates to a catalytic process for the preparation of alkylene glycols from alkylene oxide and water. Further, the invention relates to a method of preservation of catalysts in alkylene oxide containing systems. More in particular, it has been found that particular acids have a positive effect on the lifetime of catalyst systems based on anion exchange resins, and particularly those in the bicarbonate form.
    Type: Grant
    Filed: April 9, 2002
    Date of Patent: November 12, 2002
    Assignee: Dow Global Technologies Inc.
    Inventors: Gary R. Strickler, Guo-Shuh J. Lee, William J. Rievert, Daniel J. LaPrairie, Edward E. Timm
  • Process for the preparation of alkylene glycols
    Patent number: 6448456
    Abstract: The present invention relates to a catalytic process for the preparation of alkylene glycols from alkylene oxide and water. Further, the invention relates to a method of preservation of catalysts in alkylene oxide containing systems. More in particular, it has been found that polycarboxylic acids, preferably oxalic acid, have a positive effect on the lifetime of catalyst systems based on anion exchange resins, and particularly those in the bicarbonate and oxalate forms.
    Type: Grant
    Filed: March 11, 2002
    Date of Patent: September 10, 2002
    Assignee: The Dow Chemical Company
    Inventors: Gary R. Strickler, Guo-Shuh J. Lee, William J. Rievert, Daniel J. LaPrairie, Edward E. Timm