Patents by Inventor Stephen John MacDonald

Stephen John MacDonald 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).

  • Plastic powder filled epoxy paint for tubing
    Patent number: 6835428
    Abstract: An improved method of applying an epoxy paint coating to a tube includes the step of mixing plastic particles into the epoxy paint prior to application on the tube. The plastic particles improve the paint's abrasion and corrosion resistance and also improves the paint's ability to withstand downstream forming operations.
    Type: Grant
    Filed: January 28, 2000
    Date of Patent: December 28, 2004
    Assignee: Cooper Technology Services, LLC
    Inventors: Duane J. Pontbriand, Stephen John MacDonald