1
Nelson H Ludwig, Earl E Ose: Controlled release formulations and method of treatment. Eli Lilly and Company, Charles W Ashbrook, Arthur R Whale, October 6, 1981: US04293539 (148 worldwide citation)

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 period ...


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Nelson H Ludwig, Rudolph J Boisvenue: Controlled release parasitic formulations and method. Eli Lilly and Company, Charles W Ashbrook, Arthur R Whale, May 25, 1982: US04331652 (13 worldwide citation)

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 a ...


3
Nelson H Ludwig: Process for formulating a synthetic drug for use in animal feed, and resulting formulation. Eli Lilly and Company, Joseph A Jones, Leroy Whitaker, May 12, 1987: US04665100 (11 worldwide citation)

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.


4