Back to results
US 5,206,024 AGranted
Density element for ruminal delivery device
AssigneeAlza Corporation
InventorsJohn R. Peery, James B. Eckenhoff
Life of this patent
Estimating the term…
Abstract
A corrosion resistent density element for use in ruminal delivery devices which fragments upon contact with the blades in grinding machinery without damage to the blades. The density element has density of at least about 1.5 g/ml and a transverse rupture strength no greater than about 30,000 psi.
Claims17
A density element for use in a ruminal drug delivery device comprising an agglomeration of high density particles bonded together, said density element having:
- a) a density of at least 2.2 gm/ml and sufficient to maintain the delivery device in the rumen of a living animal;
- and
- b) a transverse rupture strength no greater than about 30,000 psi such that said element fragments upon contact with the blades of grindng equipment without damage to the blades;
- said density element being free of the drug being delivered and having a corrosion resistance sufficient to prevent any significant loss in weight of said density element in the rumen from insertion to slaughter.
1 more element
A ruminal drug delivery device comprising, in combination:
- a) a dosage of a drug to be delivered to the rumen of a ruminant animal;
- and
- b) density element means for maintaining said device in the rumen of said animal, said density element means being separate from said dosage and comprising an agglomeration of high-density particles bonded together, said density element means having (i) a density of at least 2.2 gm/ml and sufficient to maintain the overall density of said delivery device above about 1.5 gm/ml;
- and (ii) a transverse rupture strength no greater than about 30,000 psi and such that said density element fragments upon contact with moving cutting blades without damage to said blades, said density element means being free of the drug being delivered and having a corrosion resistance sufficient to prevent significant loss of weight in the rumen from administration to slaughter.
1 more element
Dependencies are inferred from the claim text.