Patents by Inventor Millard Justin Dahl

Millard Justin Dahl 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: 6298690
    Abstract: A large tumbling device into which broken pieces of labeled glass such as beverage bottles, or cullet, are fed. After entering the interior chamber of the tumbler, the cullet is carried by a plurality of interior fins along the inside circumference of the tumbler to a point where the glass falls back to the low point of the tumbler. During this fall, the cullet passes through a flame generated in the interior cavity of said tumbler. The glass is heated to a temperature well below 600 degrees Fahrenheit (the temperature at which the molecular structure of glass begins to change) therefore ensuring that the processed glass retains its original properties. This process is repeated numerous times, ensuring that all of the foreign material is removed, before the cullet passes through the entirety of the chamber and is cooled to be processed into the desired grades.
    Type: Grant
    Filed: May 24, 2000
    Date of Patent: October 9, 2001
    Inventors: Joel Millard Dahl, Millard Justin Dahl