US4490352A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Encapsulated efficacious zinc phosphide rodenticide
Assignee: Occidental Chemical Corp
•
Filing: 1982-10-18
•
Granted: 1984-12-25
•
Expires: 2002-10-18
Abstract
Abstract A rodenticide is disclosed comprising an encapsulated zinc phosphide toxicant, a bait, and a binder for adhering the encapsulated zinc phosphide to the bait, said binder comprising a polyol or a sugar-containing fluid. The encapsulant is a thermoplastic polyamide, preferably nylon, present in an amount of from about 2% to about 10% by weight of zinc phosphide. When the bait is a grain or a processed grain, a zinc salt is preferably added to the rodenticide to inhibit the generation of phosphine. Histamine, a histamine salt or a histamine-producing substance, such as red pepper, can also be added to the rodenticide to stimulate acid secretion in the stomach of the rodent. A particulate encapsulated product is also disclosed comprising a core of zinc phosphide having a coating of a thermoplastic polyamide present in the range of from about 2% to about 10% by weight. The encapsualted product is a small particle capable of passing through a 40 mesh size screen.
Inventors
- 👤 George T. Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:09
CPC Classifications
A; A01; A01N; A01N25/00; A01N25/26; A01N25/002; A01N25/004; A01N59/00; A01N59/26
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
48 words
A particulate encapsulated product comprising a core of zinc phosphide and a coating of a thermoplastic polyamide, said polyamide being present in the range of from about 2% to about 10% by weight of zinc phosphide, said encapsulated product being capable of passing through a 40 mesh screen.
Claim 2
Dependent Claim
48 words
A particulate encapsulated product comprising a core of zinc phosphide and a coating of a thermoplastic polyamide, said polyamide being present in the range of from about 2% to about 10% by weight of zinc phosphide, said encapsulated product being capable of passing through a 40 mesh screen.
Claim 3
Dependent Claim
16 words
The encapsulated product of claim 1 which is capable of passing through a 100 mesh screen.
Claim 4
Dependent Claim
81 words
A rodenticide comprising an effective amount of zinc phosphide coated with from about 2% to about 10% by weight of a thermoplastic polyamide, a bait, and a binder for adhering the coated zinc phosphide to the bait, said binder comprising a polyol or a sugar-containing fluid present in an amount of from about 5% to about 10% by weight of bait, the coated zinc phosphide being present in an amount of from about 0.2% to about 5% by weight of bait.
Claim 5
Dependent Claim
81 words
A rodenticide comprising an effective amount of zinc phosphide coated with from about 2% to about 10% by weight of a thermoplastic polyamide, a bait, and a binder for adhering the coated zinc phosphide to the bait, said binder comprising a polyol or a sugar-containing fluid present in an amount of from about 5% to about 10% by weight of bait, the coated zinc phosphide being present in an amount of from about 0.2% to about 5% by weight of bait.
Claim 6
Dependent Claim
26 words
The rodenticide of claim 3 wherein the coated zinc phosphide is present in an amount of from about 1% to about 2% by weight of bait.
Claim 7
Dependent Claim
10 words
The rodenticide of claim 3 wherein the polyamide is nylon.
Claim 8
Dependent Claim
11 words
The rodenticide of claim 5 wherein the nylon is nylon 6-12.
Claim 9
Dependent Claim
11 words
The rodenticide of claim 5 wherein the nylon is nylon 66.
Claim 10
Dependent Claim
11 words
The rodenticide of claim 5 wherein the nylon is nylon 6-10.
Claim 11
Dependent Claim
11 words
The rodenticide of claim 5 wherein the nylon is nylon 6.
Claim 12
Dependent Claim
18 words
The rodenticide of claim 3 wherein the zinc phosphide is coated with about 5% by weight of polyamide.
Claim 13
Dependent Claim
11 words
The rodenticide of claim 3 wherein the binder comprises a glycol.
Claim 14
Dependent Claim
14 words
The rodenticide of claim 11 wherein the binder comprises propylene glycol or ethylene glycol.
Claim 15
Dependent Claim
14 words
The rodenticide of claim 11 wherein the binder comprises polyethylene glycol or polypropylene glycol.
Claim 16
Dependent Claim
10 words
The rodenticide of claim 11 wherein the binder comprises molasses.
Claim 17
Dependent Claim
10 words
The rodenticide of claim 11 wherein the binder comprises caramel.
Claim 18
Dependent Claim
15 words
The rodenticide of claim 3 wherein the bait comprises a grain or a processed grain.
Claim 19
Dependent Claim
31 words
The rodenticide of claim 16 wherein the bait further comprises a zinc salt or zinc oxide present in an amount of from about 0.001% to about 1% by weight of bait.
Claim 20
Dependent Claim
12 words
The rodenticide of claim 17 wherein the zinc salt is zinc oxide.
Claim 21
Dependent Claim
25 words
The rodenticide of claim 18 wherein the zinc oxide is present in an amount of from about 0.1% to about 0.2% by weight of bait.
Claim 22
Dependent Claim
43 words
The rodenticide of claim 3 which further comprises a stimulant selected from the group consisting of histamine, a histamine salt, beef bouillon and red pepper, said stimulant being present in an amount of from about 0.005% to about 0.1% by weight of bait.
Claim 23
Dependent Claim
94 words
A rodenticide comprising an effective amount of zinc phosphide coated with from about 2% to about 10% by weight of a thermoplastic polyamide, a bait comprising a grain or a processed grain, from about 5% to about 10% by weight of a binder comprising a polyol or a sugar-containing fluid, from about 0.001% to about 1% by weight of zinc oxide, and from about 0.005% to about 0.1% of histamine or a histamine salt, the coated zinc phosphide being present in an amount of from about 0.2% to about 5% by weight of bait.
Claim 24
Dependent Claim
94 words
A rodenticide comprising an effective amount of zinc phosphide coated with from about 2% to about 10% by weight of a thermoplastic polyamide, a bait comprising a grain or a processed grain, from about 5% to about 10% by weight of a binder comprising a polyol or a sugar-containing fluid, from about 0.001% to about 1% by weight of zinc oxide, and from about 0.005% to about 0.1% of histamine or a histamine salt, the coated zinc phosphide being present in an amount of from about 0.2% to about 5% by weight of bait.
References Cited (Backward Citations)
US4376112A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-12-25 | 1988-06-25 | 1988-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-25 | 1992-06-25 | 1992-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-25 | 1996-06-25 | 1996-12-25 | $7700.00 | Window Closed / Lapsed |