Patents Represented by Attorney Andrew J. Grifis

Find this attorney in the Justia Lawyer Directory

  • Preparation of aromatic polyamides from carbon monoxide, a diamine and an aromatic chloride
    Patent number: 5693746
    Abstract: The present invention is directed to a process for preparing an aromatic polyamide. More specifically, the process involves reacting an aromatic chloride having at least two chlorine atoms covalently bonded to an aromatic ring in non-ortho positions or an aromatic chloroamine having at least one chlorine atom covalently bonded to an aromatic ring and at least one amino group covalently bonded an aromatic ring, carbon monoxide, and a diamine, in the presence of an iodide salt, a catalyst, and a base.
    Type: Grant
    Filed: December 16, 1994
    Date of Patent: December 2, 1997
    Assignee: Eastman Chemical Company
    Inventor: Robert James Perry