Patents by Inventor Leonard B. Pfeil

Leonard B. Pfeil 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).

  • Production of articles from powdered metals
    Patent number: 5132080
    Abstract: A process for producing porous articles from metal powders. A slurry including metal powders is deposited on a horizontally moving surface. The slurry/moving surface combination is passed through an evaporating zone, a calender zone and a sintering zone to form the desired article. The article is then separated from the moving surface.
    Type: Grant
    Filed: November 28, 1944
    Date of Patent: July 21, 1992
    Assignee: Inco Limited
    Inventor: Leonard B. Pfeil
  • Method for the production of nickel powder
    Patent number: 4673430
    Abstract: 1. An improved method for producing fine nickel powder having a substantially spherical form and size ranging from about 3 microns to about 7 microns, containing sulphur within a critical range of about 0.02% to about 0.
    Type: Grant
    Filed: March 25, 1947
    Date of Patent: June 16, 1987
    Assignee: Inco Limited
    Inventor: Leonard B. Pfeil