Patents by Inventor Harry Pulaski

Harry Pulaski 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).

  • Sulfonation of hydroxyethylated polybenzimidazole fibers
    Patent number: 4826502
    Abstract: A process for sulfonating preformed hydroxyethylated polybenzimidazole fibers is disclosed. The process comprises the steps of forming an hydroxyethylated polybenzimidazole spinning solution; spinning hydroxyethylated polybenzimidazole fibers, sulfonating the fibers by contacting them with a sulfonating agent, and heating the fiber in an inert atmosphere at a temperature and for a period of time sufficient to convert the ionic bonds, formed in the sulfonating step to covalent bonds, thereby, providing a covalently bonded, sulfonated, hydroxyethylated polybenzimidazole fiber. The fibers produced by the process of the present invention exhibit cation selectivity for electrodialysis and electrochemical applications.
    Type: Grant
    Filed: July 13, 1987
    Date of Patent: May 2, 1989
    Assignee: Hoechst Celanese Corp.
    Inventors: Michael J. Sansone, Frank J. Onorato, Harry Pulaski