Patents by Inventor Nelson H. Ludwig

Nelson H. Ludwig 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).

  • Patent number: 4665100
    Abstract: A method of formulating a synthetic drug for use in animal feed, for the purpose of reducing carry-over of the synthetic drug to subsequent lots of animal feed in the feed mill.
    Type: Grant
    Filed: February 15, 1983
    Date of Patent: May 12, 1987
    Assignee: Eli Lilly and Company
    Inventor: Nelson H. Ludwig
  • Patent number: 4331652
    Abstract: Controlled release formulations useful in controlling endoparasitic infestation in animals over a prolonged period of time are comprised of an anthelmintic agent intimately dispersed throughout a copolymeric matrix derived from the condensation of about 60 to about 95 weight percent of lactic acid and about 40 to about 5 weight percent of glycolic acid, said copolymeric matrix being substantially free of polymerization catalyst.
    Type: Grant
    Filed: December 24, 1980
    Date of Patent: May 25, 1982
    Assignee: Eli Lilly and Company
    Inventors: Nelson H. Ludwig, Rudolph J. Boisvenue
  • Patent number: 4293539
    Abstract: Controlled release formulations useful in the prolonged treatment and control of microbial infections in animals are comprised of a microbial agent intimately dispersed throughout a copolymer derived from lactic acid and glycolic acid. A method for providing protection to animals for extended periods of time following a single administration is provided.
    Type: Grant
    Filed: September 12, 1979
    Date of Patent: October 6, 1981
    Assignee: Eli Lilly and Company
    Inventors: Nelson H. Ludwig, Earl E. Ose