Patents by Inventor Urho V. Valtakari

Urho V. Valtakari 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).

  • Procedure for classifying a crystal mixture or concentrating rocks or mixed crystals in particle form
    Patent number: 4624416
    Abstract: A process for classifying a crystal mixture or for concentrating rocks or mixed crystals in particle form by capturing the particles in a gas flow for the purpose of separating particles of different size and weight by means of natural or artificial gravity is disclosed. The particles are heated to a temperature so high that a difference sufficient for separation is obtained in volume or weight between different particles. For spodumene, quartz and feldspar this temperature is about 1000.degree. C.
    Type: Grant
    Filed: March 18, 1985
    Date of Patent: November 25, 1986
    Assignee: Oy Partek AB
    Inventors: Kjell A. M. Dahlberg, Urho V. Valtakari