Patents by Inventor Raymond F. Sewell

Raymond F. Sewell 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).

  • Dry mink feed
    Patent number: 4143169
    Abstract: A method of producing a dry, extruded feed for carnivorous animals containing a large amount of proteinaceous materials, a minor amount of farinaceous materials and up to about 24% fat by weight is disclosed. More specifically, a hard dry high fat feed having excellent particle integrity is extruded under conditions of elevated temperature and pressure without the use of materials to selectively bind the fat to the other food ingredients.
    Type: Grant
    Filed: May 26, 1977
    Date of Patent: March 6, 1979
    Assignee: Ralston Purina Company
    Inventors: Leroy V. Skoch, Raymond F. Sewell