Patents by Inventor Wolfgang B. Pietsch

Wolfgang B. Pietsch 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).

  • Metallized iron briquet
    Patent number: 4116679
    Abstract: The method of making a briquet from directly reduced finely divided metallized material is disclosed whereby 85 to 95% of metallized material is mixed with 5 to 15% of a binder to form a free flowing briquet feed, then densifying the feed material and forming it into briquets.
    Type: Grant
    Filed: March 24, 1977
    Date of Patent: September 26, 1978
    Assignee: Midrex Corporation
    Inventor: Wolfgang B. Pietsch
  • Briquet and method of making same
    Patent number: 4105457
    Abstract: A briquet consisting of agglomerated directly reduced metallized particles, or mineral ore particles or a mixture thereof and a binder consisting of hydrated lime, sodium silicate and water. The method of making the briquet is also disclosed.
    Type: Grant
    Filed: June 22, 1977
    Date of Patent: August 8, 1978
    Assignee: Midrex Corporation
    Inventors: Wolfgang B. Pietsch, Charles A. Schroer
  • Compacted, passivated metallized iron product
    Patent number: 4093455
    Abstract: A compacted, passivated metallized iron product useful as a feed material for a steelmaking process, the product generally being formed by the compaction of hot metallized iron material, thus forming a product with a very dense face and a less dense center. The total iron present in the product is at least 75% in the metallic state and generally from 90% to 96% in the metallic state.
    Type: Grant
    Filed: December 22, 1976
    Date of Patent: June 6, 1978
    Assignee: Midrex Corporation
    Inventor: Wolfgang B. Pietsch
  • Method for continuous passivation of sponge iron material
    Patent number: 4076520
    Abstract: A method for continuous passivation of hot sponge iron material, by feeding hot sponge iron material to a compactor, compacting the material to a high density elongated strip-like mass, cutting the mass longitudinally into a plurality of strips while simultaneously compacting the freshly cut longitudinal edges, cutting the strips transversely of their longitudinal dimensions while simultaneously compacting these freshly cut transverse edges.
    Type: Grant
    Filed: April 5, 1976
    Date of Patent: February 28, 1978
    Assignee: Midrex Corporation
    Inventor: Wolfgang B. Pietsch
  • Apparatus for continuous passivation of sponge iron material
    Patent number: 4033559
    Abstract: Apparatus for continuous passivation of hot sponge iron material consists of a feeder, a roll compactor for forming a high density continuous elongated mass, and longitudinal and transverse shearing devices, along with the requisite control and transporting mechanisms.
    Type: Grant
    Filed: April 5, 1976
    Date of Patent: July 5, 1977
    Assignee: Midrex Corporation
    Inventor: Wolfgang B. Pietsch
  • Binder composition
    Patent number: 4032352
    Abstract: A binder composition for agglomerating directly reduced metallized particles and mineral ore particles comprises pitch, hydrated lime, sodium silicate and water. An agglomerated product is also disclosed.
    Type: Grant
    Filed: May 3, 1976
    Date of Patent: June 28, 1977
    Assignee: Midrex Corporation
    Inventor: Wolfgang B. Pietsch