Patents by Inventor Daniel E. Ressler

Daniel E. Ressler 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 to increase N-use efficiency and reduce leaching
    Patent number: 5913368
    Abstract: A tool bar for placement of a band of fertilizer in soil has a vertical knife with a horizontal blade thereon to create an inverted T-shaped slot in the soil. A band of fertilizer is placed in the bottom of the slot through a tube on the knife. A first coulter fills the slot with soil and compacts the soil above the band. A second coulter forms a mound of soil over the compacted soil and creates an elongated furrow in the soil above and laterally removed from the band. The method of placement of a band of fertilizer in soil sequentially moves the soil and creates the band as accomplished by the foregoing structure.
    Type: Grant
    Filed: July 17, 1998
    Date of Patent: June 22, 1999
    Assignee: Iowa State University Research Foundation, Inc.
    Inventors: Robert Horton, Daniel E. Ressler, Thomas C. Kaspar, James L. Baker
  • Method and tool to increase in-use efficiency and reduce leaching
    Patent number: 5797459
    Abstract: A tool bar for placement of a band of fertilizer in soil has a vertical knife with a horizontal blade thereon to create an inverted T-shaped slot in the soil. A band of fertilizer is placed in the bottom of the slot through a tube on the knife. A first coulter fills the slot with soil and compacts the soil above the band. A second coulter forms a mound of soil over the compacted soil and creates an elongated furrow in the soil above and laterally removed from the band. The method of placement of a band of fertilizer in soil sequentially moves the soil and creates the band as accomplished by the foregoing structure.
    Type: Grant
    Filed: June 6, 1997
    Date of Patent: August 25, 1998
    Assignee: Iowa State University Research Foundation, Inc.
    Inventors: Robert Horton, Daniel E. Ressler, Thomas C. Kaspar, James L. Baker