Patents by Inventor Don M. Keister

Don M. Keister 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 of enhancing egg laying in turkeys using epostane
    Patent number: 5215978
    Abstract: The method of enhancing egg laying in the turkey which comprises administering to a turkey hen an amount of epostane sufficient to increase significantly the number of eggs laid during the egg laying cycle of said turkey hen is disclosed.
    Type: Grant
    Filed: December 13, 1991
    Date of Patent: June 1, 1993
    Assignee: The Upjohn Company
    Inventor: Don M. Keister
  • Method of regulating fertility in swine using epostane
    Patent number: 4870068
    Abstract: The method of regulating fertility in swine which comprises administering to a pregnant sow near term an amount of epostane sufficient to induce parturition of live piglets on the following day is disclosed.
    Type: Grant
    Filed: May 22, 1986
    Date of Patent: September 26, 1989
    Assignee: Sterling Drug Inc.
    Inventor: Don M. Keister