US3938986A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Herbicide
Assignee: PPG Industries Inc
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Filing: 1970-07-28
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Granted: 1976-02-17
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Expires: 1990-07-28
Abstract
Abstract Herbicidally active alkyl N-phenylcarbamates are employed in combination with phenyl esters of N-alkylcarbamic acid or N,N-dialkylcarbamic acid. For example, a herbicidally active isopropyl N-phenylcarbamate is formulated in admixture with a phenyl N-methylcarbamate. The presence of the N-alkylcarbamate enhances the effectiveness of the N-phenylcarbamate as a herbicide by extending its soil persistence, increasing its herbicidal activity and/or altering its spectrum of practical herbicidal activity.
Inventors
- 👤 Blaine O. Pray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:55
CPC Classifications
A; A01; A01N; A01N47/00; A01N47/08; A01N47/10; A01N47/12; A01N2300/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
41 words
A herbicidal composition containing as a herbicidal component isopropyl N-(3-chlorophenyl)carbamate in an amount sufficient to be herbicidally effective when applied to the soil, and further containing an amount of 4-chlorophenyl N-methylcarbamate sufficient to extend the soil life of said isopropyl N-(3-chlorophenyl)carbamate.
Claim 2
Dependent Claim
41 words
A herbicidal composition containing as a herbicidal component isopropyl N-(3-chlorophenyl)carbamate in an amount sufficient to be herbicidally effective when applied to the soil, and further containing an amount of 4-chlorophenyl N-methylcarbamate sufficient to extend the soil life of said isopropyl N-(3-chlorophenyl)carbamate.
Claim 3
Dependent Claim
23 words
The herbicidal composition of claim 1 wherein the weight ratio of said isopropyl N-(3-chlorophenyl)carbamate and said 4-chlorophenyl N-methylcarbamate is between 1:1 and 10:1.
Claim 4
Dependent Claim
41 words
A herbicidal composition containing as a herbicidal component isopropyl N-phenylcarbamate in an amount sufficient to be herbicidally effective when applied to the soil, and further containing an amount of 4-chlorophenyl N-methylcarbamate sufficient to extend the soil life of said isopropyl N-phenylcarbamate.
Claim 5
Dependent Claim
41 words
A herbicidal composition containing as a herbicidal component isopropyl N-phenylcarbamate in an amount sufficient to be herbicidally effective when applied to the soil, and further containing an amount of 4-chlorophenyl N-methylcarbamate sufficient to extend the soil life of said isopropyl N-phenylcarbamate.
Claim 6
Dependent Claim
23 words
The herbicidal composition of claim 3 wherein the weight ratio of said isopropyl N-phenylcarbamate and said 4-chlorophenyl N-methylcarbamate is between 1:1 and 10:1.
Claim 7
Independent Claim
48 words
A method of controlling weeds comprising applying to the area in which weeds are living both a herbicidal amount of a compound selected from the group consisting of isopropyl N-(3-chlorophenyl)carbamate and isopropyl N-phenylcarbamate and an amount of 4-chlorophenyl N-methylcarbamate sufficient to extend the soil life of said compound.
Claim 8
Independent Claim
48 words
A method of controlling weeds comprising applying to the area in which weeds are living both a herbicidal amount of a compound selected from the group consisting of isopropyl N-(3-chlorophenyl)carbamate and isopropyl N-phenylcarbamate and an amount of 4-chlorophenyl N-methylcarbamate sufficient to extend the soil life of said compound.
Claim 9
Dependent Claim
11 words
The method of claim 5 wherein said compound is isopropyl N-(3-chlorophenyl)carbamate.
Claim 10
Dependent Claim
11 words
The method of claim 5 wherein said compound is isopropyl N-phenylcarbamate.
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) | 1979-02-16 | 1979-08-18 | 1980-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-16 | 1983-08-18 | 1984-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-16 | 1987-08-18 | 1988-02-17 | $7700.00 | Window Closed / Lapsed |