04293539 is referenced by 148 patents and cites 15 patents.

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.

Title
Controlled release formulations and method of treatment
Application Number
6/74684
Publication Number
4293539
Application Date
September 12, 1979
Publication Date
October 6, 1981
Inventor
Earl E Ose
Greenfield
IN, US
Nelson H Ludwig
Greenfield
IN, US
Agent
Arthur R Whale
Charles W Ashbrook
Assignee
Eli Lilly and Company
IN, US
IPC
A61K 9/22
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