Patents by Inventor Endang Pangestuti

Endang Pangestuti 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).

  • Method of depositing chromium and silicon on a metal to form a diffusion coating
    Patent number: 5589220
    Abstract: A method for the simultaneous deposition of chromium and silicon to form a diffusion coating on a workpiece uses a halide-activated cementation pack with a dual halide activator. Elemental metal powders may be employed with the dual activator. A two-step heating schedule prevents blocking a chromium carbide from forming at the surface of the workpiece. Small contents of either Ce or V can be added to the Cr+Si contents of the coating by introducing oxides of Ce or V into the filler of the pack.
    Type: Grant
    Filed: October 30, 1995
    Date of Patent: December 31, 1996
    Assignee: The Ohio State University Research Foundation
    Inventors: Robert A. Rapp, Ge Wang, Endang Pangestuti
  • Method of depositing chromium and silicon on a metal to form a diffusion coating
    Patent number: 5492727
    Abstract: A method for the simultaneous deposition of chromium and silicon to form a diffusion coating on a workpiece uses a halide-activated cementation pack with a dual halide activator. Elemental metal powders may be employed with the dual activator. A two-step heating schedule prevents blocking a chromium carbide from forming at the surface of the workpiece. Small contents of either Ce or V can be added to the Cr+Si contents of the coating by introducing oxides of Ce or V into the filler of the pack.
    Type: Grant
    Filed: May 10, 1994
    Date of Patent: February 20, 1996
    Assignee: The Ohio State University Research Foundation
    Inventors: Robert A. Rapp, Ge Wang, Endang Pangestuti