Patents by Inventor Lester J. Dankert

Lester J. Dankert 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).

  • Wood crossties with cellular plastic inserts
    Patent number: 4134546
    Abstract: A wooden structure incapable of holding a fastening device is restored by boring a hole of a desired size into the structure, cleaning the hole, and introducing a cellular plastic insert of a suitable size, so that the insert can hold a fastening device driven thereinto. The method is particularly useful for restoring a "spike-killed" railroad crosstie; the insert is composed of cellular high density polyethylene having average bulk density from about 15 to 50 pounds per cubic foot.
    Type: Grant
    Filed: December 9, 1976
    Date of Patent: January 16, 1979
    Assignee: The Dow Chemical Company
    Inventor: Lester J. Dankert