US4765837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alloy and product made therefrom
Assignee: Castex Products Ltd
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Filing: 1987-02-02
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Granted: 1988-08-23
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Expires: 2007-02-02
Abstract
Abstract A pellet or bolus for administration to a ruminant by deposition in its rumeno-reticular sac where it is eroded away by rumen juices and releases active agent(s) and/or components, either continuously or in pulsed doses, comprises or incorporates a magnesium-based alloy which comprises at least 40% of magnesium, at least 30% zinc and up to 20% aluminium and, optionally, copper up to 5%, and trace elements, selected from cobalt, manganese, nickel and selenium up to 1%, the percentages being by weight. A paste can be made by heating the alloy to between its solidus and liquidus points, when it can be admixed with lead shot for weighting the bolus. In the illustrated case, the bolus comprises tubular sheath 14 which contains alloy/iron shot filling 16. However, the alloy can be used for any appropriate component of the bolus.
Inventors
- 👤 Derek J. Whitehead
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:00
CPC Classifications
A; A61; A61K; A61K9/00; A61K9/0012; A61K9/0053; A61K9/0068; A61M; A61M31/00; A61M31/002; C; C22; C22C; C22C23/00; C22C23/04
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
64 words
An alloy of which the constituents, or the principal constituents, are magnesium, zinc and aluminium, and suitable for use in the production of, or incorporation in, a pellet for administration to a ruminant by deposition in its rumeno-reticular sac, characterised in that said alloy comprises magnesium to the extent of at least 40%, zinc at least 30% and aluminium up to 20% by weight.
Claim 2
Dependent Claim
64 words
An alloy of which the constituents, or the principal constituents, are magnesium, zinc and aluminium, and suitable for use in the production of, or incorporation in, a pellet for administration to a ruminant by deposition in its rumeno-reticular sac, characterised in that said alloy comprises magnesium to the extent of at least 40%, zinc at least 30% and aluminium up to 20% by weight.
Claim 3
Dependent Claim
17 words
An alloy as claimed in claim 1 further including copper in an amount of up to 5%.
Claim 4
Dependent Claim
30 words
An alloy as claimed in claim 1 or 2 characterised in that it comprises: magnesium--from 45% to 50% zinc--from 34% to 42% aluminium--from 5% to 15% copper--from 0 to 5%.
Claim 5
Dependent Claim
26 words
An alloy as claimed in claim 3 characterised in that it comprises: magnesium--50% zinc--40% aluminium--8% copper--2% or: magnesium--50% zinc--37% aluminium--8% copper--5% or: magnesium--48% zinc--38% aluminium--12% copper--2%.
Claim 6
Dependent Claim
29 words
An alloy as claimed in any preceding claim further including one or more additional elements selected from cobalt, manganese, nickel, iron and selenium, in amounts up to 1% each.
Claim 7
Dependent Claim
31 words
A mixture, suitable for fabrication into a pellet for administration to a ruminant by deposition in its rumeno-reticular sac, comprising an alloy as claimed in any preceding claim incorporating iron shot.
Claim 8
Dependent Claim
27 words
A mixture as claimed in claim 6 characterised in that it comprises three parts by weight of iron shot and one part by weight of the alloy.
Claim 9
Dependent Claim
21 words
A mixture as claimed in claim 6 or 7 wherein the alloy comprises about 38% zinc, 11% aluminium, and 2% copper.
Claim 10
Independent Claim
47 words
A method of making a pellet for administration to a ruminant by deposition in its rumeno-retircular sac which comprises converting an alloy as claimed in any preceding claim to particulate form, filling the same into a mould or die, and compressing the same to form a pellet.
Claim 11
Dependent Claim
22 words
A method as claimed in claim 9 wherein iron powder and additional zinc powder are mixed with the particulate alloy before compressing.
Claim 12
Dependent Claim
37 words
A method as claimed in claim 10 wherein the alloy, and the added iron and zinc powders are present in the amounts of: alloy--10 parts by weight iron powder--31 parts by weight zinc powder--11 parts by weight.
Claim 13
Dependent Claim
29 words
A pellet for administration to a ruminant by deposition in its rumeno-reticular sac, characterised in that it comprises an alloy as claimed in any of claims 1 to 7.
Claim 14
Dependent Claim
20 words
A pellet as claimed in claim 12 wherein the pellet is a coherent body comprising compressed particles of the alloy.
Claim 15
Dependent Claim
17 words
A pellet as claimed in claim 12 and which comprises an outer sheath and an inner filling.
Claim 16
Dependent Claim
20 words
A pellet as claimed in any of claims 12 to 14 which further comprises an endweight which incorporates the alloy.
Claim 17
Dependent Claim
13 words
A pellet as claimed in claim 14 wherein the filling comprises the alloy.
Claim 18
Dependent Claim
21 words
A pellet as claimed in claim 12 wherein the pellet comprises a plurality of pocket elements each accommodating a respective filling.
Claim 19
Dependent Claim
17 words
A pellet as claimed in claim 17 wherein each said pocket element is made of the alloy.
Claim 20
Dependent Claim
19 words
A pellet as claimed in any of claims 12 to 18 which comprises an endweight which incorporates the alloy.
Claim 21
Dependent Claim
72 words
An alloy of which the constitutents, or the principal constitutents, are magnesium, zinc and aluminum, and suitable for use in the production of, or incorporation in, a pellet for administration to a ruminant by deposition in its rumeno-reticular sac, characterized in that said alloy comprises magnesium to the extent of at least 40%, zinc at least 30% and wherein the aluminum content is greater than zero and up to 20% by weight.
Claim 22
Dependent Claim
72 words
An alloy of which the constitutents, or the principal constitutents, are magnesium, zinc and aluminum, and suitable for use in the production of, or incorporation in, a pellet for administration to a ruminant by deposition in its rumeno-reticular sac, characterized in that said alloy comprises magnesium to the extent of at least 40%, zinc at least 30% and wherein the aluminum content is greater than zero and up to 20% by weight.
Claim 23
Dependent Claim
68 words
An alloy of which the constitutents, or the principal constitutents, are magnesium, zinc and aluminum, and suitable for use in the production of, or incorporation in, a pellet for administration to a ruminant by deposition in its rumeno-reticular sac, characterized in that said alloy comprises magnesium to the extent of at least 40%, zinc at least 30% and wherein aluminum content is from 5 to 20% by weight.
Claim 24
Dependent Claim
68 words
An alloy of which the constitutents, or the principal constitutents, are magnesium, zinc and aluminum, and suitable for use in the production of, or incorporation in, a pellet for administration to a ruminant by deposition in its rumeno-reticular sac, characterized in that said alloy comprises magnesium to the extent of at least 40%, zinc at least 30% and wherein aluminum content is from 5 to 20% by weight.
References Cited (Backward Citations)
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Cited
AU470538A
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US2546931A
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US3291656A
Cited
GB1030101A
Cited
BE673067A
Cited
GB1172673A
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FR1560365A
Cited
US4040129A
Cited
US4600661A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-08-23 | 1992-02-22 | 1992-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-23 | 1996-02-22 | 1996-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-23 | 2000-02-22 | 2000-08-23 | $7700.00 | Window Closed / Lapsed |