Patents by Inventor Kenneth R. Tarburton

Kenneth R. Tarburton 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 a-methylenelactones and a-substituted hydrocarbylidene lactones
    Patent number: 6531616
    Abstract: This invention pertains to a process for making &agr;-methylenelactones and &agr;-substitute hydrocarbylidene lactones. More specifically, the present invention obtains high yields of &agr;-methylene-&ggr;-butyrolactone by heating &ggr;-butyrolactone and diethyl oxalate in the presence of a base. The second step comprises treatment of the &agr;-oxalyl enolate salt with formaldehyde to afford the &agr;-methylene-&ggr;-butyrolactone.
    Type: Grant
    Filed: December 21, 2001
    Date of Patent: March 11, 2003
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Rutger D. Puts, Charles Brandenburg, Kenneth R. Tarburton
  • Process for the preparation of a-methylenelactones and a-substituted hydrocarbylidene lactones
    Publication number: 20020143195
    Abstract: This invention pertains to a process for making &agr;-methylenelactones and &agr;-substituted hydrocarbylidene lactones. More specifically, the present invention obtains high yields of &agr;-methylene-&ggr;-butyrolactone by heating &ggr;-butyrolactone and diethyl oxalate in the presence of a base. The second step comprises treatment of the &agr;-oxalyl enolate salt with formaldehyde to afford the &agr;-methylene-&ggr;-butyrolactone.
    Type: Application
    Filed: December 21, 2001
    Publication date: October 3, 2002
    Inventors: Rutger D. Puts, Charles Brandenburg, Kenneth R. Tarburton