Patents Represented by Attorney C. P. Ribando

Find this attorney in the Justia Lawyer Directory

  • Revertant serotype 1 Marek's disease vaccine
    Patent number: 4895717
    Abstract: A Marek's disease vaccine comprising either a revertant virus derived by backpassaging an attenuated serotype 1 Md11 virus or an antigenic component of the virus is characterized by increased levels of replicative ability and protectivity in chickens as compared to the original attenuated strain. Revertants of the invention are exemplified by a clone identified as Md11/75C/R2 and can be formulated into monovalent and polyvalent vaccines.
    Type: Grant
    Filed: July 10, 1987
    Date of Patent: January 23, 1990
    Assignee: The United States of America as represented by the Secretary of Agriculture
    Inventor: Richard L. Witter
  • Serotype 2 Marek's disease vaccine
    Patent number: 4895718
    Abstract: A serotype 2 Marek's disease vaccine comprising a cloned strain designated as 301B/1 has been derived from a field isolate. This strain is characterized by superior levels of replicative ability and protectivity in chickens as compared to existing commercial serotype 2 strains, and it is virtually nonpathogenic. 301B/1 is particularly useful in the formulation of highly efficacious bivalent and polyvalent vaccines.
    Type: Grant
    Filed: July 10, 1987
    Date of Patent: January 23, 1990
    Assignee: The United States of America, as represented by the Secretary of Agriculture
    Inventor: Richard L. Witter