N-phenylpyrazole-based antiparasitic external device for cattle, in particular ear-rings
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United States of America Patent
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Jan 12, 1999
Issued Date -
N/A
app pub date -
May 27, 1997
filing date -
Mar 29, 1996
priority date (Note) -
Expired
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Abstract
The external device such as a ring, in particular an ear-ring, intended to eliminate cattle parasites, in particular Haematobia irritans, formed of a matrix including from 0.1 to 40%, preferably from 2.5 to 10%, by weight, relative to the ear-ring, of an active substance which is at least one compound of formula (I) below: ##STR1## this external device being designed to ensure efficacy for more than 30 weeks.
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