Patents by Inventor Ronald W. Lewoniuk

Ronald W. Lewoniuk 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).

  • Pipe coating composition
    Publication number: 20070254990
    Abstract: A pipe coating composition comprises a linear polyethylene having a specific melt index and a narrow molecular weight distribution and an additive package comprising a hindered phenolic, a phosphite and a hindered amine light stabilizer. The composition preferably contains carbon black. The composition permits high rates of application and provides good oxidative induction times.
    Type: Application
    Filed: April 11, 2007
    Publication date: November 1, 2007
    Inventors: Ronald W. Lewoniuk, Ian Robert Gibbons