US5654258A
Expired / Lapsed
US
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Herbicidal composition comprising trifluralin in a porous carrier
Assignee: Agriculture Victoria Services Pty Ltd
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Filing: 1994-03-17
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Granted: 1997-08-05
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Expires: 2014-03-17
Abstract
Abstract A solid, water dispersible, storage-stable trifluralin formulation comprises trifluralin supported inside porous, finely divided carrier particles, optionally together with at least one compatible wetting agent and/or dispersant additive, wherein the trifluralin is in the orange polymorphic form and the particles of the formulation are size-stable.
Inventors
- 👤 Darren James Park
- 👤 Gottfried Lichti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:33
CPC Classifications
A; A01; A01N; A01N33/00; A01N33/16; A01N33/18
Claims Analysis
Total Claims: 41
Claim 1
Independent Claim
17 words
A solid, water-dispersible, storage-stable trifluralin formulation, comprising orange-stable trifluralin supported inside porous, finely divided, size-stable carrier particles.
Claim 2
Dependent Claim
17 words
A solid, water-dispersible, storage-stable trifluralin formulation, comprising orange-stable trifluralin supported inside porous, finely divided, size-stable carrier particles.
Claim 3
Dependent Claim
29 words
A formulation according to claim 1, wherein the trifluralin present in the pores of the carrier particles occupies less than 98% of the pore volume of said carrier particles.
Claim 4
Dependent Claim
29 words
A formulation according to claim 1, wherein the trifluralin present in the pores of the carrier particles occupies less than 95% of the pore volume of said carrier particles.
Claim 5
Dependent Claim
29 words
A formulation according to claim 1, wherein the trifluralin present in the pores of the carrier particles occupies less than 90% of the pore volume of said carrier particles.
Claim 6
Dependent Claim
19 words
A formulation according to claim 1, wherein said trifluralin comprises from 50 to 70 wt % of the formulation.
Claim 7
Dependent Claim
19 words
A formulation according to claim 1 wherein said trifluralin comprises from 55 to 65 wt % of the formulation.
Claim 8
Dependent Claim
20 words
A formulation according to claim 1, wherein at least 80% of said trifluralin is present in the orange polymorphic form.
Claim 9
Dependent Claim
20 words
A formulation according to claim 1 wherein at least 90% of said trifluralin is present in the orange polymorphic form.
Claim 10
Dependent Claim
20 words
A formulation according to claim 1 wherein at least 95% of said, trifluralin is present in the orange polymorphic form.
Claim 11
Dependent Claim
19 words
A formulation according to claim 1, wherein at most 15% of said trifluralin is present in amorphous polymorphic form.
Claim 12
Dependent Claim
19 words
A formulation according to claim 1 wherein at most 5% of said trifluralin is present in amorphous polymorphic form.
Claim 13
Dependent Claim
19 words
A formulation according to claim 1 wherein at most 1% of said trifluralin is present in amorphous polymorphic form.
Claim 14
Dependent Claim
18 words
A formulation according to claim 1, wherein said trifluralin is of a purity 93 to 99 wt %.
Claim 15
Dependent Claim
19 words
A formulation according to claim 1, wherein said trifluralin is of a purity of at least 97 wt %.
Claim 16
Dependent Claim
19 words
A formulation according to any of claims 1, further comprising at least one compatible wetting agent and/or dispersant additive.
Claim 17
Dependent Claim
24 words
A formulation according to claim 15, wherein said additive is a dispersant and is present in an amount of 2 to 10 wt %.
Claim 18
Dependent Claim
15 words
A formulation according to claim 16, wherein said dispersant is the sodium salt of N-methyl-N-oleoyltaurate.
Claim 19
Dependent Claim
24 words
A formulation according to claim 15, wherein said additive is a dispersant and is present in an amount of 3 to 6 wt %.
Claim 20
Dependent Claim
25 words
A formulation according to claim 15, wherein said additive is a wetting agent and is present in an amount of 0.5 to 5 wt %.
Claim 21
Dependent Claim
15 words
A formulation according to claim 19, wherein said wetting agent is sodium alkyl naphthalene sulphonate.
Claim 22
Dependent Claim
25 words
A formulation according to claim 15, wherein said additive is a wetting agent and is present in an amount of 1 to 3 wt %.
Claim 23
Dependent Claim
29 words
A formulation according to any of claim 1, wherein said carrier particles are finely divided porous inorganic particles having a surface area of at least 60 m 2 /g.
Claim 24
Dependent Claim
15 words
A formulation according to claim 22, wherein said inorganic particles are silica or silicate particles.
Claim 25
Dependent Claim
23 words
A formulation according to claim 23, wherein said silica or silicate particles have a surface area of 100 to 300 m 2 /g.
Claim 26
Dependent Claim
23 words
A formulation according to claim 23, wherein said silica or silicate particles have a surface area of 150 to 250 m 2 /g.
Claim 27
Dependent Claim
28 words
A formulation according to claim 23, wherein said silica or silicate particles have an adsorbed water content of 2 to 12 wt % before loading of the trifluralin.
Claim 28
Dependent Claim
28 words
A formulation according to claim 23, wherein said silica or silicate particles have an adsorbed water content of 3 to 6 wt % before loading of the trifluralin.
Claim 29
Dependent Claim
18 words
A formulation according to claim 1, wherein said carrier particles have a particle size not exceeding 70 μm.
Claim 30
Dependent Claim
22 words
A formulation according to claim 1, wherein said carrier particles have a particle size in the range of 5 to 30 μm.
Claim 31
Dependent Claim
15 words
A formulation according to claim 1 further comprising at least on other particulate active ingredient.
Claim 32
Dependent Claim
18 words
A formulation according to claim 30, wherein said at least on other particulate active ingredient is another herbicide.
Claim 33
Dependent Claim
11 words
A formulation according to claim 1 further comprising a pulverized clay.
Claim 34
Dependent Claim
20 words
A formulation according to claim 32, wherein said pulverized clay is selected from the group consisting of kaolin and attapulgite.
Claim 35
Independent Claim
95 words
A method for the preparation of a solid, water-dispersible, storage-stable trifluralin formulation comprising orange-stable trifluralin supported inside porous, finely divided, size-stable carrier particles said method comprising the steps of adding molten trifluralin to heated carrier particles, maintaining the mixture at a temperature above the melting point of trifluralin for a period of time sufficient to allow substantially all of the trifluralin to be absorbed by the carrier particles, and then gradually cooling the carrier particles to a temperature in the range of 15° to 25° C. over a time period of 1/2 to 12 hours.
Claim 36
Independent Claim
95 words
A method for the preparation of a solid, water-dispersible, storage-stable trifluralin formulation comprising orange-stable trifluralin supported inside porous, finely divided, size-stable carrier particles said method comprising the steps of adding molten trifluralin to heated carrier particles, maintaining the mixture at a temperature above the melting point of trifluralin for a period of time sufficient to allow substantially all of the trifluralin to be absorbed by the carrier particles, and then gradually cooling the carrier particles to a temperature in the range of 15° to 25° C. over a time period of 1/2 to 12 hours.
Claim 37
Dependent Claim
16 words
A method according to claim 34, further comprising the step of dividing the cooled carrier particles.
Claim 38
Dependent Claim
16 words
A method according to claim 35, wherein said cooled carrier particles are divided by hammer milling.
Claim 39
Dependent Claim
32 words
A method according to claim 34, wherein the carrier particles are cooled to a temperature in the range of 15 to 20° C., over a time period of 1 to 6 hours.
Claim 40
Independent Claim
46 words
A method for treating soil to prevent emergence of weeds thereon, which comprises: forming an aqueous dispersion of a water-dispersible trifluralin formulation comprising orange-stable trifluralin supported inside porous, finely divided, size-stable carrier particles; and applying a herbicidally effective amount of said aqueous dispersion to the soil.
Claim 41
Independent Claim
46 words
A method for treating soil to prevent emergence of weeds thereon, which comprises: forming an aqueous dispersion of a water-dispersible trifluralin formulation comprising orange-stable trifluralin supported inside porous, finely divided, size-stable carrier particles; and applying a herbicidally effective amount of said aqueous dispersion to the soil.
References Cited (Backward Citations)
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 2000-08-04 | 2001-02-03 | 2001-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-08-04 | 2005-02-03 | 2005-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-08-04 | 2009-02-03 | 2009-08-05 | $7700.00 | Window Closed / Lapsed |