Patents by Inventor Helmut Stegmann

Helmut Stegmann 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).

  • Process for the preparation of a vaccine against panleucopenia of the cat
    Patent number: 4312947
    Abstract: A vaccine against panleucopenia is prepared by passing pathogenic panleucopenia virus first at least 80 times in cat kidney cells, then at least 18 times in permanent tissue cells of felidae or mustelidae, propagating the attenuated virus thus obtained on cat fetal cells and working it up to a vaccine.
    Type: Grant
    Filed: January 21, 1977
    Date of Patent: January 26, 1982
    Assignee: Behringwerke Aktiengesellschaft
    Inventors: Othmar Ackermann, Helmut Stegmann