Patents Assigned to Robert E. Hopkins, II, D.V.M., Inc.
  • Enzyme castration of animals
    Patent number: 5164181
    Abstract: Male animals may be chemically castrated by injecting both testes and/or both spermatic cords with a castratingly effective amount of a protease enzyme such as a chymopapain-rich enzyme preparation.
    Type: Grant
    Filed: January 14, 1992
    Date of Patent: November 17, 1992
    Assignee: Robert E. Hopkins, II, D.V.M., Inc.
    Inventors: Jules Silver, Robert E. Hopkins, II