Patents by Inventor Terry Ludwig

Terry Ludwig 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).

  • Patent number: 12030827
    Abstract: The present invention relates to an aqueous liquid fertilizer composition having a 4 wt % to 30 wt % nitrogen content and 8 wt % to 27 wt % sulfur content comprising more than 20 wt % ammonium thiosulfate, calculated as dry matter, and at least 2 wt %, calculated as dry matter, of one other compound selected from the group consisting of a sulfite, bisulfite, urea-triazone compound and zinc sulfate hexahydrate or mixtures thereof, wherein the composition has a salt out temperature of about 0 C or less as measured with the FFF-method. The aqueous liquid fertilizer composition of the present invention can have an amount of sulfur of about 21 wt % or higher, for example 22-26 wt %.
    Type: Grant
    Filed: July 9, 2019
    Date of Patent: July 9, 2024
    Assignee: Tessenderlo Kerley, Inc.
    Inventors: Michael Massoud Hojjatie, Constance Lynn Frank Lockhart, Thomas Fairweather, Terry Ludwig
  • Publication number: 20210309584
    Abstract: The present invention relates to an aqueous liquid fertilizer composition having a 4 wt % to 30 wt % nitrogen content and 8 wt % to 27 wt % sulfur content comprising more than 20 wt % ammonium thiosulfate, calculated as dry matter, and at least 2 wt %, calculated as dry matter, of one other compound selected from the group consisting of a sulfite, bisulfite, urea-triazone compound and zinc sulfate hexahydrate or mixtures thereof, wherein the composition has a salt out temperature of about 0 C or less as measured with the FFF-method. The aqueous liquid fertilizer composition of the present invention can have an amount of sulfur of about 21 wt % or higher, for example 22-26 wt %.
    Type: Application
    Filed: July 9, 2019
    Publication date: October 7, 2021
    Inventors: Michael Massoud HOJJATIE, Constance Lynn Frank LOCKHART, Thomas FAIRWEATHER, Terry LUDWIG
  • Patent number: 7090263
    Abstract: An apparatus for latching a door against a frame has a door pin extending from the door and a handle lever rotatably mounted to the door and having an extending handle pin. A latch bar is mounted for reciprocating travel relative to the frame, the latch bar having a first slot having a cam surface adapted to receive the door pin, and a second slot adapted to receive the handle pin. The latch bar and handle have a first position where the handle pin enters the second slot and the door pin enters the first slot, and a second position where the handle pin contacts the second slot and the cam surface bears against the door pin. Rotation of the handle when the latch bar is in the first position causes the handle pin to bear against the second slot, moving the latch bar in a latching direction from the first position to the second position, so that the first slot on the cam surface bears against the door pin and urges the door in a closing direction.
    Type: Grant
    Filed: May 4, 2001
    Date of Patent: August 15, 2006
    Assignee: SPX Corporation
    Inventors: John Patrick Quigley, Terry Ludwig
  • Publication number: 20020163208
    Abstract: An apparatus for latching a door against a frame has a door pin extending from the door and a handle lever rotatably mounted to the door and having an extending handle pin. A latch bar is mounted for reciprocating travel relative to the frame, the latch bar having a first slot having a cam surface adapted to receive the door pin, and a second slot adapted to receive the handle pin. The latch bar and handle have a first position where the handle pin enters the second slot and the door pin enters the first slot, and a second position where the handle pin contacts the second slot and the cam surface bears against the door pin. Rotation of the handle when the latch bar is in the first position causes the handle pin to bear against the second slot, moving the latch bar in a latching direction from the first position to the second position, so that the first slot on the cam surface bears against the door pin and urges the door in a closing direction.
    Type: Application
    Filed: May 4, 2001
    Publication date: November 7, 2002
    Applicant: General Signal Technology Corporation
    Inventors: John Patrick Quigley, Terry Ludwig