Patents by Inventor Walter Haswell

Walter Haswell 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 for compacting high alloy steel particles
    Patent number: 6099796
    Abstract: A method for producing compacted, fully dense articles from atomized tool steel alloy particles by placing the particles in a deformable container, and isostatically pressing the particles at an elevated temperature to produce a precompact having an intermediate density. The precompact is heated to a temperature above the elevated temperature used to produce the precompact. The precompact is isostatically pressed to produce the fully-dense article.
    Type: Grant
    Filed: August 13, 1999
    Date of Patent: August 8, 2000
    Assignee: Crucible Materials Corp.
    Inventors: William B. Eisen, Walter Haswell, Kenneth J. Wojslaw, Jeryl K. Wright
  • Method for compacting high alloy tool steel particles
    Patent number: 5976459
    Abstract: A method for producing compacted, fully dense articles from atomized tool steel alloy particles by placing the particles in an evacuated, deformable container, and isostatically pressing the particles at an elevated temperature to produce a precompact having an intermediate density. The precompact is heated to a temperature above the elevated temperature used to produce the precompact. The precompact is isostatically pressed to produce the fully-dense article.
    Type: Grant
    Filed: January 6, 1998
    Date of Patent: November 2, 1999
    Assignee: Crucible Materials Corporation
    Inventors: William B. Eisen, Walter Haswell, Kenneth J. Wojslaw, Jeryl K. Wright