US4159901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrosion inhibited agricultural compositions
Assignee: Monsanto Co
•
Filing: 1977-12-27
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Granted: 1979-07-03
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Expires: 1997-12-27
Abstract
Abstract Corrosion of metal surfaces contacted by aqueous agricultural compositions containing as an active ingredient an aminomethylenephosphonic acid, such as N-phosphonomethylglycine or an agriculturally acceptable salt or ester thereof is inhibited by the inclusion in the compositions of an inhibiting amount of a thiol compound or salt thereof.
Inventors
- 👤 George B. Beestman
- 👤 Erhard J. Prill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:46
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C23F11/16; C23F11/161; A; A01; A01N; A01N25/00; A01N25/22; A01N57/00; A01N57/18; A01N57/20
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
107 words
A herbicidal or plant growth regulant composition comprising an active ingredient selected from the aminomethylenephosphonic acids of the formula ##STR5## wherein y and z are each individually 1 or 2, and x is 0 or 1, the sum of x, y and z being 3, and the agriculturally acceptable salts and esters thereof, at least one of water or a surfactant, and a metal corrosion inhibiting amount of a thio compound selected from alkane thiols having from 2 to 16 carbon atoms in the alkane moiety, aromatic thiols, the alkali metal salts of said thiols and the ammonium and alkali metal thio salts of polybasic inorganic acids.
Claim 2
Dependent Claim
107 words
A herbicidal or plant growth regulant composition comprising an active ingredient selected from the aminomethylenephosphonic acids of the formula ##STR5## wherein y and z are each individually 1 or 2, and x is 0 or 1, the sum of x, y and z being 3, and the agriculturally acceptable salts and esters thereof, at least one of water or a surfactant, and a metal corrosion inhibiting amount of a thio compound selected from alkane thiols having from 2 to 16 carbon atoms in the alkane moiety, aromatic thiols, the alkali metal salts of said thiols and the ammonium and alkali metal thio salts of polybasic inorganic acids.
Claim 3
Dependent Claim
12 words
An composition according to claim 1 wherein the alkane thiol is 1-dodecanethiol.
Claim 4
Dependent Claim
12 words
An composition according to claim 1 wherein the alkane thiol is 1-octanethiol.
Claim 5
Dependent Claim
12 words
An composition according to claim 1 wherein the alkane thiol is 1-hexadecylthiol.
Claim 6
Dependent Claim
14 words
An composition according to claim 1 wherein the ammonium thio salt is ammonium thiosulfate.
Claim 7
Dependent Claim
14 words
An composition according to claim 1 wherein the ammonium thio salt is ammonium thiophosphate.
Claim 8
Dependent Claim
25 words
An composition according to claim 1 wherein the amount of the thio compound is between 0.15 and 3 percent by weight of the active ingredient.
Claim 9
Dependent Claim
32 words
A composition according to claim 1 containing, in addition, between 1 and 10 parts by weight of oxalic acid per 1 to 10 parts by weight of an amine salt of N-phosphonomethylglycine.
Claim 10
Dependent Claim
20 words
A dry composition according to claim 1 wherein the thiol is a straight chain alkane thiol and complexed with urea.
Claim 11
Dependent Claim
12 words
An composition according to claim 1 wherein the active ingredient is N-phosphonomethylglycine.
Claim 12
Dependent Claim
13 words
An composition according to claim 1 wherein the active ingredient is 2,2'-bisphosphonomethyliminoacetic acid.
Claim 13
Dependent Claim
15 words
An composition according to claim 1 wherein the active ingredient is a salt of N-phosphonomethylglycine.
Claim 14
Dependent Claim
15 words
An composition according to claim 12 wherein the salt is the monoisopropylamine salt of N-phosphonomethylglycine.
Claim 15
Independent Claim
121 words
A method for inhibiting corrosion of iron and zinc metal surfaces in contact with an aqueous herbicidal and plant growth regulant composition comprising water, a surfactant and an active ingredient selected from the aminomethylenephosphonic acids of the formula ##STR6## wherein y and z are each individually 1 or 2, and x is 0 or 1, the sum of x, y and z being 3, and the agriculturally acceptable salts and esters thereof which comprises adding to the composition an inhibiting amount of a thio compound selected from alkane thiols having from 2 to 16 carbon atoms in the alkane moiety, aromatic thiols, the alkali metal salts of said thiols and the ammonium and alkali metal thio salts of polybasic inorganic acids.
Claim 16
Independent Claim
121 words
A method for inhibiting corrosion of iron and zinc metal surfaces in contact with an aqueous herbicidal and plant growth regulant composition comprising water, a surfactant and an active ingredient selected from the aminomethylenephosphonic acids of the formula ##STR6## wherein y and z are each individually 1 or 2, and x is 0 or 1, the sum of x, y and z being 3, and the agriculturally acceptable salts and esters thereof which comprises adding to the composition an inhibiting amount of a thio compound selected from alkane thiols having from 2 to 16 carbon atoms in the alkane moiety, aromatic thiols, the alkali metal salts of said thiols and the ammonium and alkali metal thio salts of polybasic inorganic acids.
Claim 17
Dependent Claim
13 words
A method in accordance with claim 14 wherein the alkane thiol is 1-dodecanethiol.
Claim 18
Dependent Claim
13 words
A method in accordance with claim 14 wherein the alkane thiol is 1-octanethiol.
Claim 19
Dependent Claim
13 words
A method in accordance with claim 14 wherein the alkane thiol is 1-hexadecylthiol.
Claim 20
Dependent Claim
14 words
A method in accordance with claim 14 wherein the thio compound is ammonium thiosulfate.
Claim 21
Dependent Claim
29 words
A method in accordance with claim 14 wherein the thio compound constitutes between 0.15 and 3 percent by weight of the aminomethylenephosphonic acid, or the salts or esters thereof.
Claim 22
Dependent Claim
38 words
A method in accordance with claim 14 wherein the thiol is an alkane thiol complexed with urea and the urea-thiol complex is admixed with a dry mixture of the active ingredient and the surfactant before dispersing in water.
Claim 23
Independent Claim
70 words
A method which comprises contacting a plant with a phytotoxic amount of an agueous herbicidal composition comprising an amine salt of N-phosphonomethylglycine, a surfactant and a metal corrosion inhibiting amount of a thio compound selected from alkane thiols having from 2 to 16 carbon atoms in the alkane moiety, aromatic thiols, the alkali metal salts of said thiols and the ammonium and alkali metal thio salts of polybasic inorganic acids.
Claim 24
Independent Claim
70 words
A method which comprises contacting a plant with a phytotoxic amount of an agueous herbicidal composition comprising an amine salt of N-phosphonomethylglycine, a surfactant and a metal corrosion inhibiting amount of a thio compound selected from alkane thiols having from 2 to 16 carbon atoms in the alkane moiety, aromatic thiols, the alkali metal salts of said thiols and the ammonium and alkali metal thio salts of polybasic inorganic acids.
Claim 25
Dependent Claim
24 words
A method according to claim 21 wherein the thio compound constitutes between 0.15 and 3 percent by weight of the amine salt of N-phosphonomethylglycine.
Claim 26
Dependent Claim
16 words
A method according to claim 21 wherein the amine salt is the monoisopropylamine salt of N-phosphonomethylglycine.
Claim 27
Independent Claim
112 words
A method which comprises contacting a plant with a plant growth regulating amount of an aqueous plant growth regulating composition comprising a compound selected from the aminomethylenephosphonic acids having the formula ##STR7## wherein y and z are each individually 1 or 2, and x is 0 or 1, the sum of x, y and z being 3, and the agriculturally acceptable salts and esters thereof, a surfactant, and metal corrosion inhibiting amount of a thio compound selected from alkane thiols having from 2 to 16 carbon atoms in the alkane moiety, aromatic thiols, the alkali metal salts of said thiols and the ammonium and alkali metal thio salts of polybasic inorganic acids.
Claim 28
Independent Claim
112 words
A method which comprises contacting a plant with a plant growth regulating amount of an aqueous plant growth regulating composition comprising a compound selected from the aminomethylenephosphonic acids having the formula ##STR7## wherein y and z are each individually 1 or 2, and x is 0 or 1, the sum of x, y and z being 3, and the agriculturally acceptable salts and esters thereof, a surfactant, and metal corrosion inhibiting amount of a thio compound selected from alkane thiols having from 2 to 16 carbon atoms in the alkane moiety, aromatic thiols, the alkali metal salts of said thiols and the ammonium and alkali metal thio salts of polybasic inorganic acids.
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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) | 1982-07-02 | 1983-01-01 | 1983-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-07-02 | 1987-01-01 | 1987-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-07-02 | 1991-01-01 | 1991-07-03 | $7700.00 | Window Closed / Lapsed |