US4399122A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Controlled release granules
Assignee: EIDP Inc
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Filing: 1981-10-27
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Granted: 1983-08-16
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Expires: 2001-10-27
Abstract
Abstract Controlled release granules of methyl 2-(dimethylamino)-N-[[(methylamino)carbonyl]oxy]-2-oxo-ethanimidothioate, oxamyl, are effective soil insecticides and nematicides, and are especially useful for the prolonged control of root knot nematodes.
Inventors
- 👤 Stanley Tocker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:01
CPC Classifications
A; A01; A01N; A01N25/00; A01N25/26; A01N25/12; A01N47/00; A01N47/08; A01N47/10; A01N47/24
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
122 words
An insecticidal or nematicidal granule consisting essentially of particles of an inert carrier impregnated or coated with an effective amount of oxamyl and coated or impregnated with a barrier material, said barrier material having a water absorption rate of no greater than about 0.2% when measured for 1/8" specimen in water at 73.4° F. for 24 hours, and said granule being capable of releasing oxamyl in water at 20° C. at a rate of no more than 80% in 4 hours, said barrier material consisting essentially of paraffin wax admixed with up to about 50% of a modifier or combination of modifiers selected from low molecular weight oxidized polyethylenes, ethylene copolymers containing up to about 40% of vinyl acetate comonomer and polyterpenes.
Claim 2
Dependent Claim
122 words
An insecticidal or nematicidal granule consisting essentially of particles of an inert carrier impregnated or coated with an effective amount of oxamyl and coated or impregnated with a barrier material, said barrier material having a water absorption rate of no greater than about 0.2% when measured for 1/8" specimen in water at 73.4° F. for 24 hours, and said granule being capable of releasing oxamyl in water at 20° C. at a rate of no more than 80% in 4 hours, said barrier material consisting essentially of paraffin wax admixed with up to about 50% of a modifier or combination of modifiers selected from low molecular weight oxidized polyethylenes, ethylene copolymers containing up to about 40% of vinyl acetate comonomer and polyterpenes.
Claim 3
Dependent Claim
15 words
The composition of claim 1 where the modifier is a low molecular weight oxidized polyethylene.
Claim 4
Dependent Claim
21 words
The composition of claim 1 where the modifier is an ethylene copolymer containing up to about 40% of vinyl acetate comonomer.
Claim 5
Dependent Claim
11 words
The composition of claim 1 where the modifier is a polyterpene.
Claim 6
Dependent Claim
27 words
The composition of any of claims 1 to 4 where the paraffin wax is admixed with about 25 to 50% of a modifier or combination of modifiers.
Claim 7
Dependent Claim
25 words
The composition of claim 2 where the paraffin wax and the low molecular weight oxidized polyethylene are present in a weight ratio of approximately 1:1.
Claim 8
Dependent Claim
12 words
The composition of claim 1 where the inert carrier is fused attapulgite.
Claim 9
Dependent Claim
16 words
The composition of claim 1 which contains about 4 to 30% by weight of barrier material.
Claim 10
Dependent Claim
14 words
The composition of claim 8 which contains about 20% by weight of barrier material.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-08-15 | 1987-02-14 | 1987-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-15 | 1991-02-14 | 1991-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-15 | 1995-02-14 | 1995-08-16 | $7700.00 | Window Closed / Lapsed |