Patents by Inventor Steven L. Wilmeth

Steven L. Wilmeth 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).

  • Method for making sucker rod oil well pump
    Patent number: 5009000
    Abstract: A method of hardening a sucker rod well pump has a step of forming a boronized case on the plunger. Then the plunger is heated and quenched to form a hardened steel supporting layer. A chromium case is formed on the barrel.
    Type: Grant
    Filed: July 19, 1989
    Date of Patent: April 23, 1991
    Assignee: Scot Industries, Inc.
    Inventors: Thomas S. Wilmeth, Steven L. Wilmeth, Francis E. Foster