Patents by Inventor Tilak Suren Lewkebandara

Tilak Suren Lewkebandara 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).

  • Preparation of light-colored isocyanates
    Patent number: 9382198
    Abstract: The invention relates to the preparation of isocyanates by phosgenation of amines in the gas phase, with these isocyanates having a comparatively low proportion of color-imparting compounds.
    Type: Grant
    Filed: November 12, 2008
    Date of Patent: July 5, 2016
    Assignees: Covestro Deutschland AG, Covestro LLC
    Inventors: Herbert Stutz, Reinhard Halpaap, Tilak Suren Lewkebandara
  • Preparation of light-colored isocyanates
    Publication number: 20090149671
    Abstract: The invention relates to the preparation of isocyanates by phosgenation of amines in the gas phase, with these isocyanates having a comparatively low proportion of color-imparting compounds.
    Type: Application
    Filed: November 12, 2008
    Publication date: June 11, 2009
    Inventors: Herbert Stutz, Reinhard Halpaap, Tilak Suren Lewkebandara