Patents by Inventor Michael Krull

Michael Krull 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).

  • Dispersions of polymeric oil additives
    Patent number: 11976248
    Abstract: The invention provides dispersions comprising I) at least one oil-soluble polymer effective as a cold flow improver for mineral oils, II) at least one organic, water-immiscible solvent, III) a dispersant comprising, based on the total amount of dispersant, a) 10-90% by weight of a salt of an ethercarboxylic acid and b) 90-10% by weight of a nonionic surfactant, IV) water and V) at least one organic, water-miscible solvent.
    Type: Grant
    Filed: August 13, 2018
    Date of Patent: May 7, 2024
    Assignee: Dorf Ketal Energy Services LLC
    Inventors: Michael Feustel, Matthias Krull, Victor Goncharov
  • Head and head assembly for a string trimmer
    Patent number: 5987756
    Abstract: A string trimmer head and head assembly include a plurality of arms which connect the head to a hub member. One or more flails are captured between the head and the hub member and extend outwardly into a cutting plane.
    Type: Grant
    Filed: July 23, 1997
    Date of Patent: November 23, 1999
    Assignee: McCulloch Corporation
    Inventors: Jan B. Yates, Gregory A. Trees, James Lind, John F. Searle, Michael Krull, Gregory S. Kramer, Roger W. Smith, Glenn K. Redding
  • Wire guard assembly for a string trimmer
    Patent number: 5950317
    Abstract: A string trimmer includes a wire guard assembly which retains a wire guard and debris shield on a motor housing. The wire guard is retained in a pair of grooves in the motor housing to capture the debris shield between the wire guard and an upper portion of the motor housing. The wire guard is locked in place by locking members on the bottom of the shield, thereby substantially permanently connecting the shield to the motor housing without the necessity of additional parts.
    Type: Grant
    Filed: July 23, 1997
    Date of Patent: September 14, 1999
    Assignee: McCulloch Corporation
    Inventors: Jan B. Yates, Michael Krull, James Lind, Gregory A. Trees
  • Motor housing for a powered lawn and garden implement
    Patent number: D431429
    Type: Grant
    Filed: May 30, 1997
    Date of Patent: October 3, 2000
    Assignee: Jenn Feng Industrial Company, Ltd.
    Inventors: Michael Krull, Joseph A. Juratovac, R. Reade Harpham