Patents by Inventor Liyanaarachchige M. Keerthi-Tillekratne

Liyanaarachchige M. Keerthi-Tillekratne 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).

  • UV-stabilization of polymers using nitro compounds
    Patent number: 5122555
    Abstract: Polyolefins are stabilized against UV-deterioration by mixing therewith a hindered C-nitro compound having a molecular weight above 500. In a preferred embodiment the hindered C-nitro compound is a nitrated polyolefin. A conventional UV-stabilizer, such as a substituted benzophenone or a hindered piperidine, may be used in combination with the hindered C-nitro compound.
    Type: Grant
    Filed: August 2, 1990
    Date of Patent: June 16, 1992
    Assignee: Akzo NV
    Inventors: Gerald Scott, Sahar Al-Malaika, Liyanaarachchige M. Keerthi-Tillekratne