US3832468A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Use of certain smectite clays to extend residual activity of particular hydroxamates
Assignee: EIDP Inc
•
Filing: 1971-05-14
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Granted: 1974-08-27
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Expires: 1991-05-14
Abstract
Abstract Pesticidal formulations of methyl O-(methylcarbamyl)thiolacetohydroxamate and methyl O-carbamyl thiolacetohydroxamate with adsorptive uncalcined smectite-containing clays having extended residual activity, and formulations of methyl O-(methylcarbamyl)thiolaceto-hydroxamate and adsorptive uncalcined smectite-containing clays having reduced phytotoxicity on pesticide-sensitive crops such as cotton, corn and other leafy vegetables.
Inventors
- 👤 A Hyson
- 👤 J Scoggin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:45
CPC Classifications
A; A01; A01N; A01N25/00; A01N25/12
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
70 words
an adsorptive uncalcined clay having a HAT adsorptivity factor of at least 35 percent and containing at least 20 percent by weight of a smectite having a 2:1 expanding crystal lattice, a cation exchange capacity in the range of about 50-150 milliequivalents per 100 grams and a lattice spacing in the range of about 9-30A, the weight ratio of smectite to active ingredient in the composition being at least 3:4.
Claim 2
Dependent Claim
30 words
The composition of claim 1 wherein said uncalcined clay has a HAT adsorptivity factor of at least 40 percent and contains at least 75 percent by weight of said smectite.
Claim 3
Dependent Claim
31 words
The composition of claim 2 having reduced phytotoxicity wherein (a) the active ingredient is methyl O-(methylcarbamyl) thiolacetohydroxamate and (b) the weight ratio of smectite to active ingredient is at least 20:4.
Claim 4
Dependent Claim
52 words
The composition of claim 2 which is a water-dispersible wettable powder containing about 10-50 parts of said active ingredient and about 50-90 parts of said adsorptive uncalcined smectite-containing clay, said clay having a predominance of exchangeable cations selected from the group consisting of calcium and magnesium cations interleaved in its crystal lattice.
Claim 5
Dependent Claim
50 words
The composition of claim 2 which is a dust containing about one-15 parts of said active ingredient and about 85-99 parts of said adsorptive uncalcined smectite-containing clay, said clay having a predominance of exchangeable cations selected from the group consisting of calcium and magnesium cations interleaved in its crystal lattice.
Claim 6
Dependent Claim
24 words
A method of controlling insects in the locus of plants which comprises applying thereto an insecticidally effecTive amount of the composition of claim 1.
Claim 7
Dependent Claim
24 words
A method of controlling insects in the locus of plants which comprises applying thereto an insecticidally effective amount of the composition of claim 3.
Claim 8
Dependent Claim
10 words
The method of claim 7 wherein the plants are cotton.
References Cited (Backward Citations)
US3414652A
Cited
US3576834A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-26 | 1978-02-25 | 1978-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-26 | 1982-02-25 | 1982-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-26 | 1986-02-25 | 1986-08-27 | $7700.00 | Window Closed / Lapsed |