Patents by Inventor Joe D. Chandler

Joe D. Chandler 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).

  • Stopping/restarting free radical polymerizations
    Patent number: 4433122
    Abstract: A method for stopping and restarting the free-radical polymerization of vinyl monomers (e.g. acrylic monomers) without forming low molecular weight polymer is provided. These polymerizations utilize a Redox catalyst system comprising multivalent metal ions (e.g. iron ions) as promoter. The polymerizations are stopped by chelation of the iron present. Additional monomer is added to the polymerization to avoid formation of low molecular weight polymer. Upon restart metal ions are added to the polymerization mixture.
    Type: Grant
    Filed: May 3, 1982
    Date of Patent: February 21, 1984
    Assignee: Monsanto Company
    Inventors: Raymond S. Knorr, Joe D. Chandler, Loi N. Tran