Patents by Inventor Lori D. Cooke

Lori D. Cooke 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).

  • Sprue pin for producing castings
    Patent number: 4741378
    Abstract: An improved sprue pin for producing castings by the lost wax method wherein the sprue pin gradually decreases in external circumference toward the tip of the sprue. The length and gauge of the sprue is such that it provides acceptable flow rates and solidification times for new base metal and palladium alloys. A set of lines about the circumferentially decreasing tip allows the user to conform the sprue to the size of the wax pattern being used to form the casting.
    Type: Grant
    Filed: September 20, 1985
    Date of Patent: May 3, 1988
    Assignee: Dentifax International, Inc.
    Inventors: Melvin A. Engelman, Victor Zamaloff, Lori D. Cooke