Patents by Inventor Ramon Kalyanaraman

Ramon Kalyanaraman 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 preparing polyamines for lighter color polyisocyanate based foam
    Patent number: 5484819
    Abstract: The present invention encompasses an improved process for preparing polymethylene polyphenyl polyisocyanate comprising reacting phosgene with polymethylene polyphenyl polyamine, the improvement wherein the polymethylene polyphenyl polyamine is acidified prior to phosgenation.
    Type: Grant
    Filed: October 13, 1994
    Date of Patent: January 16, 1996
    Assignee: Bayer Corporation
    Inventors: Jeffrey S. Bolton, Ramon Kalyanaraman, Steven L. Schilling, Clarence D. Blue
  • Process for preparing polyamines for lighter color polyisocyanate based foam
    Patent number: 5386059
    Abstract: The present invention encompasses an improved process for preparing polymethylene polyphenyl polyisocyanate comprising reacting phosgene with polymethylene polyphenyl polyamine, the improvement wherein the polymethylene polyphenyl polyamine is acidified prior to phosgenation.
    Type: Grant
    Filed: December 10, 1991
    Date of Patent: January 31, 1995
    Assignee: Miles Inc.
    Inventors: Jeffrey S. Bolton, Ramon Kalyanaraman, Steven L. Schilling, Clarence D. Blue