US3922161A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel herbicidal compositions
Assignee: Wyeth Holdings LLC
•
Filing: 1974-04-05
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Granted: 1975-11-25
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Expires: 1994-04-05
Abstract
Abstract This invention relates to the use of certain 1,2-dialkyl-3,5diphenyl pyrazolium salts as herbicides. It also relates to herbicidal formulations of such salts. It further relates to certain novel pyrazolium salts. Finally, it relates to methods for the preparation and use of herbicidal formulations and novel salts.
Inventors
- 👤 Bryant Leonidas Walworth
- 👤 Erwin Klingsberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:27
CPC Classifications
C; C07; C07D; C07D231/00; C07D231/02; C07D231/10; C07D231/12; A; A01; A01N; A01N43/00; A01N43/48; A01N43/56; A01N2300/00
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
25 words
A METHOD FOR THE CONTROL OF UNDERSIRABLE PLANT SPECIES COMPRISING APPLYING TO THE FOLIAGE OF SAID UNDESIRABLE PLANTS A HERBICIDALLY EFFECTIVE COMPOUND HAVING THE FORMULA:
Claim 2
Independent Claim
25 words
A METHOD FOR THE CONTROL OF UNDERSIRABLE PLANT SPECIES COMPRISING APPLYING TO THE FOLIAGE OF SAID UNDESIRABLE PLANTS A HERBICIDALLY EFFECTIVE COMPOUND HAVING THE FORMULA:
Claim 3
Dependent Claim
53 words
A method according to claim 1 wherein the compound has the structure wherein Y, Y'', Z and Z'' are hydrogen; R1 and R2 are methyl; m is 1 and X is selected from the group consisting of chloride, bromide, iodide, acetate, hydroxide, hydrogen sulfate, methyl sulfate, p-toluene sulfonate, perchlorate and alkyl sulfonate C1-C4.
Claim 4
Dependent Claim
12 words
A method according to claim 1 wherein the compound is 1,2-dimethyl-3,5-diphenylpyrazolium p-toluenesulfonate.
Claim 5
Dependent Claim
13 words
A method according to claim 1 wherein the compound is 1,2-dimethyl-3,5-diphenylpyrazolium methyl sulfate.
Claim 6
Dependent Claim
13 words
A method according to claim 1 wherein the compound is 1,2-dimethyl-3-(m-chlorophenyl)-5-phenylpyrazolium methyl sulfate.
Claim 7
Dependent Claim
13 words
A method according to claim 1 wherein the compound is 1,2-dimethyl-3-(m-methylphenyl)-5-phenylpyrazolium methyl sulfate.
Claim 8
Dependent Claim
13 words
A method according to claim 1 wherein the compound is 1,2-dimethyl-3-(o-methylphenyl)-5-phenylpyrazolium methyl sulfate.
Claim 9
Dependent Claim
13 words
A method according to claim 1 wherein the compound is 1,2-dimethyl-3-(p-chlorophenyl)-5-phenylpyrazolium methyl sulfate.
Claim 10
Dependent Claim
70 words
A method according to claim 1 wherein the undesirable plant species is wild oats and the compound has the structure wherein R1 is methyl; R2 is alkyl C1-C4; Y, Y'', Z and Z'' each independently represent a member selected from the group consisting of hydrogen, halogen, methyl and methoxy; provided that only one of the phenyl rings is substituted para to the pyrazolium ring with a substituent other than hydrogen.
Claim 11
Dependent Claim
22 words
A method according to claim 9 wherein the compound is applied at a rate of from 0.5 to 3.0 pounds per acre.
Claim 12
Dependent Claim
30 words
A method according to claim 9 for selectively controlling wild oats in the presence of a cereal grain crop by application of the compound to the wild oat infested crop.
Claim 13
Dependent Claim
32 words
A method according to claim 11 wherein application is made by spraying an aqueous solution of said compound and a surfactant selected from the group consisting of nonionic; anionic and nonionic-anionic surfactants.
Claim 14
Dependent Claim
21 words
A method according to claim 12 wherein the surfactant is nonionic and has a hydrophilic-lipophilic balance of from 11 to 16.
Claim 15
Dependent Claim
13 words
A method according to claim 11 wherein the compound is 1,2-dimethyl-3,5-diphenylpyrazolium methyl sulfate.
Claim 16
Dependent Claim
13 words
A method according to claim 12 wherein the compound is 1,2-dimethyl-3,5-diphenylpyrazolium methyl sulfate.
Claim 17
Dependent Claim
13 words
A method according to claim 9 wherein the cereal grain crop is wheat.
Claim 18
Dependent Claim
13 words
A method according to claim 9 wherein the cereal grain crop is barley.
Claim 19
Dependent Claim
13 words
A method according to claim 9 wherein the cereal grain crop is rye.
References Cited (Backward Citations)
US3754887A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-24 | 1979-05-26 | 1979-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-24 | 1983-05-26 | 1983-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-24 | 1987-05-26 | 1987-11-25 | $7700.00 | Window Closed / Lapsed |