US3959464A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microencapsulated methyl and ethyl parathion insecticide in aqueous carrier
Assignee: Arkema Inc
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Filing: 1971-06-03
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Granted: 1976-05-25
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Expires: 1991-06-03
Abstract
Abstract Microcapsules of methyl parathion or ethyl parathion contained within a wall of cross-linked polyamide-polyurea are improved insecticidal compositions having more effective and extended toxicity to insects and decreased toxicity to mammals. The compositions are stable in aqueous carriers.
Inventors
- 👤 Chester Blair DeSavigny
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:26
CPC Classifications
A; A01; A01N; A01N25/00; A01N25/26; A01N25/28; A01N57/00; A01N57/10; A01N57/14
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
92 words
A storage-stable, sprayable, aqueous-based insecticidal composition consisting essentially of a mixture in water of microcapsules comprised of methyl or ethyl parathion contained within an encapsulating wall of cross-linked polyamide-polyurea, the parathion being diffusible therethrough, about 10 to 50% of the cross-linked polyamide-polyurea encapsulating wall being embodied in a three dimensional polymer network, the weight ratio of said parathion to the polyamide-polyurea of the microcapsule being in the range of about 2:1 to 10:1, and the concentration of the microcapsules in the aqueous mixture being from about 1 to about 30% by weight.
Claim 2
Dependent Claim
92 words
A storage-stable, sprayable, aqueous-based insecticidal composition consisting essentially of a mixture in water of microcapsules comprised of methyl or ethyl parathion contained within an encapsulating wall of cross-linked polyamide-polyurea, the parathion being diffusible therethrough, about 10 to 50% of the cross-linked polyamide-polyurea encapsulating wall being embodied in a three dimensional polymer network, the weight ratio of said parathion to the polyamide-polyurea of the microcapsule being in the range of about 2:1 to 10:1, and the concentration of the microcapsules in the aqueous mixture being from about 1 to about 30% by weight.
Claim 3
Dependent Claim
24 words
The composition of claim 1 wherein the average particle size of the microcapsules is within the range of about 80 to about 100 microns.
Claim 4
Dependent Claim
24 words
The composition of claim 1 wherein about 20 to 30% of the cross-linked polyamide-polyurea encapsulating wall is embodied in a three dimensional polymer network.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-05-25 | 1979-11-24 | 1980-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-25 | 1983-11-24 | 1984-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-25 | 1987-11-24 | 1988-05-25 | $7700.00 | Window Closed / Lapsed |