Patents by Inventor George S. Libey

George S. Libey 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 production of tetraploid channel catfish
    Patent number: 4697546
    Abstract: A method for the induction of tetraploidy in channel catfish by heat-shocking fertilized eggs is described. Fertilized catfish eggs are treated after a preliminary incubation period and prior to first cell division cleavage by immersing the fertilized eggs in water at a temperature of about 40.degree. C. to about 43.degree. C. for a temperature-dependent period of time ranging from about 1 to about 4 minutes. Incubation of the heat-shocked eggs allows maturation to tetraploid catfish fry. Breeding of tetraploid catfish with normal diploids produces rapid growing triploid offspring.
    Type: Grant
    Filed: May 30, 1986
    Date of Patent: October 6, 1987
    Assignee: Purdue Research Foundation
    Inventors: Charles L. Chrisman, Christopher A. Bidwell, George S Libey
  • Method for production of a triploid channel catfish and product of method
    Patent number: 4489674
    Abstract: A method for the induction of 100% triploidy in channel catfish by cold-shocking fertilized eggs at about 5.degree. C. for up to about 1.0 hour starting about 5 minutes after fertilization.
    Type: Grant
    Filed: February 25, 1981
    Date of Patent: December 25, 1984
    Assignee: Purdue Research Foundation
    Inventors: William R. Wolters, Charles L. Chrisman, George S. Libey