Patents by Inventor Carl P. Stroble

Carl P. Stroble 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 refining magnetic domains of electrical steels to reduce core loss
    Patent number: 4919733
    Abstract: A method is provided for domain refinement of electrical sheet products, such as grain-oriented silicon steel and amorphous magnetic materials, by subjecting at least one surface of the steel to an electron beam treatment to produce narrow substantially parallel bands of treated regions separated by untreated regions substantially transverse to the direction of strip manufacture to improve core loss without damaging the surface or any coating thereon.
    Type: Grant
    Filed: March 3, 1988
    Date of Patent: April 24, 1990
    Assignee: Allegheny Ludlum Corporation
    Inventors: James A. Salsgiver, Randal K. Knipe, Carl P. Stroble
  • Method of producing grain-oriented silicon steel with small boron additions
    Patent number: 4878959
    Abstract: A method is provided for producing cube-on-edge grain-oriented silicon steel by producing 3 to 10 ppm boron and a manganese-to-sulfur and/or selenium ratio of at least 2.5 in a final gauge steel strip prior to final texture annealing and including a two-stage cold reduction wherein the final cold reduction is less than 75% to provide a steel having improved magnetic properties with a secondary grain size of less than 10 mm and a permeability of 1850 or more at 10 oersteds.
    Type: Grant
    Filed: April 13, 1989
    Date of Patent: November 7, 1989
    Assignee: Allegheny Ludlum Corporation
    Inventors: Carl P. Stroble, Anthony P. More
  • Method for improving the magnetic properties of grain oriented silicon steel
    Patent number: 4411714
    Abstract: A method for improving the magnetic permeability and core loss of grain oriented silicon steel; the improvement in these magnetic properties is achieved by conducting annealing prior to cold rolling at a temperature above the temperature at which transformation to austenite occurs and thereafter quenching said steel.
    Type: Grant
    Filed: August 24, 1981
    Date of Patent: October 25, 1983
    Assignee: Allegheny Ludlum Steel Corporation
    Inventors: Amitava Datta, Carl P. Stroble