Patents by Inventor Louw DeJong

Louw DeJong 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).

  • Wear resistant inner coating for pipes and pipe fittings
    Patent number: 8962154
    Abstract: A pipe or pipe fitting for use in harsh environment such as in petroleum refinery processes for cracking petroleum feedstocks, the pipe or pipe fitting comprising a 0.25 to 2.5 mm thick Co-based metallic coating on an internal surface of the pipe body, the coating having a hypereutectic microstructure characterized by carbides in a cobalt matrix and an average carbide grain size of less than 50 microns, and the Co-based metallic composition overlays the pipe internal surface at an interface which is free of heat-affected zone and which has a diffusion zone which is less than 0.002 inches thick.
    Type: Grant
    Filed: June 17, 2011
    Date of Patent: February 24, 2015
    Assignee: Kennametal Inc.
    Inventors: Matthew Yao, Louw DeJong, Danie DeWet
  • WEAR RESISTANT INNER COATING FOR PIPES AND PIPE FITTINGS
    Publication number: 20120318399
    Abstract: A pipe or pipe fitting for use in harsh environment such as in petroleum refinery processes for cracking petroleum feedstocks, the pipe or pipe fitting comprising a 0.25 to 2.5 mm thick Co-based metallic coating on an internal surface of the pipe body, the coating having a hypereutectic microstructure characterized by carbides in a cobalt matrix and an average carbide grain size of less than 50 microns, and the Co-based metallic composition overlays the pipe internal surface at an interface which is free of heat-affected zone and which has a diffusion zone which is less than 0.002 inches thick.
    Type: Application
    Filed: June 17, 2011
    Publication date: December 20, 2012
    Applicant: DELORO STELLITE HOLDINGS CORPORATION
    Inventors: Matthew Yao, Louw DeJong, Danie DeWet