Patents by Inventor Donald B. Kelley

Donald B. Kelley 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: 5799386
    Abstract: A process for making metal castings, comprising the steps of(a) preparing an alloy from at least two different metals;(b) forming the alloy into a powder;(c) optionally combining the powder with a lubricant and/or flux;(d) pressing the powder into pellets;(e) melting one or more of the pellets;(f) casting the molten alloy into the mold;(g) cooling the metal casting.This process allows for the production of alloy castings even from high melting poorly soluble metals. The use of pellets containing a lubricant and/or flux is preferred. In addition the pellets may contain deoxidizers, grain refiners, and/or oxidizers. The process is especially suitable for the manufacture of dental, jewelry and precision castings.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: September 1, 1998
    Assignee: Ivoclar AG
    Inventors: Clyde E. Ingersoll, Bernt-Roger Gustafsson, Donald B. Kelley