Patents by Inventor Jonathan K. Roberts

Jonathan K. Roberts 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).

  • Built-in grout line for a well casing
    Patent number: 5435387
    Abstract: A combination well casing and grout line for grouting the area of a hole dug for a well between the well casing and the sides of the hole. A number of well casing sections connect end-to-end. Each well casing section is provided with at least one grout line which extends the longitudinal length of the well casing section. The grout line forms a continuous channel upon assembly of the well casing sections and permits a grouting material to fill the remaining open area in the hole outside of the well casing progressively from the bottom to the top.
    Type: Grant
    Filed: July 19, 1993
    Date of Patent: July 25, 1995
    Inventor: Jonathan K. Roberts