Patents by Inventor J. Todd Aplin

J. Todd Aplin 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).

  • Anionic polymerization process
    Patent number: 6657028
    Abstract: A batch process for the anionic polymerization of a styrenic monomer is described. The process brings together a liquid saturated hydrocarbon diluent, an ether promoter, an organolithium initiator and a styrenic monomer in such a way so as to maintain the reaction mixture at or below about 55° C. and so that the amount of organolithium initiator employed is in the range of about 1 to about 10 mol %, based upon the total amount of styrenic monomer to be added. Favorable polydispersity and molecular weight polymer characteristics are obtained.
    Type: Grant
    Filed: August 1, 2002
    Date of Patent: December 2, 2003
    Assignee: Albemarle Corporation
    Inventors: J. Todd Aplin, Charles H. Kolich, W. Dirk Klobucar, Kimberly A. Maxwell
  • Isomerization of vinylidene olefins
    Patent number: 6639118
    Abstract: Process technology for selectively isomerizing vinylidene olefin to tri-substituted olefin is described. The vinylidene olefin, normally in admixture with other types of olefins, especially linear 1-olefins, is treated with anhydrous hydrogen bromide under anhydrous conditions and in the absence of molecular oxygen and free radical initiator. The contacting period, which can be a matter of minutes, is sufficient to selectively isomerize the vinylidene olefin to tri-substituted olefin. If the process is conducted properly, little if any hydrobromination occurs.
    Type: Grant
    Filed: October 11, 2002
    Date of Patent: October 28, 2003
    Inventors: Bonnie G. McKinnie, J. Todd Aplin, Robert U. Lyons, Clinton R. Parham