US3920443A
Expired / Lapsed
US
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Herbicidal compositions
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1973-03-23
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Granted: 1975-11-18
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Expires: 1993-03-23
Abstract
Abstract Herbicidal compositions containing a bipyridylium quaternary salt and an alkyl pyridine odourant.
Inventors
- 👤 Nigel Wyndham Drewe
- 👤 Alan Cecil Waters
- 👤 Peter Ernest Giffard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:46
CPC Classifications
A; A01; A01N; A01N43/00; A01N43/34; A01N43/40
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
33 words
A CONCENTRATED HERBICIDAL COMPOSITION, COMPRISING AN AQUEOUS SOLUTION OF A HERBICIDALLY EFFECTIVE AMOUNT OF A SALT OF A HERBICIDAL BIPRIDYLIUM QUATERNARY CATION SELECTED FROM THE GROUP CONSISTING OF A COMPOUNDS OF THE FORMULA:
Claim 2
Dependent Claim
33 words
A CONCENTRATED HERBICIDAL COMPOSITION, COMPRISING AN AQUEOUS SOLUTION OF A HERBICIDALLY EFFECTIVE AMOUNT OF A SALT OF A HERBICIDAL BIPRIDYLIUM QUATERNARY CATION SELECTED FROM THE GROUP CONSISTING OF A COMPOUNDS OF THE FORMULA:
Claim 3
Dependent Claim
12 words
A composition according to claim 1 which further comprises a surface-active agent.
Claim 4
Dependent Claim
13 words
A composition according to claim 1 wherein the alkyl pyridine comprises a methylpyridine.
Claim 5
Dependent Claim
25 words
A composition according to claim 1 wherein the odourant comprises a mixture of alkyl pyridines having a boiling point range of from 140* to 180*C.
Claim 6
Dependent Claim
25 words
A composition according to claim 1 wherein the odourant is present in the proportion of from 5 to 20 grams per liter of the composition.
Claim 7
Dependent Claim
18 words
A composition as claimed in claim 1 which further comprises a gel forming amount of a gelling agent.
Claim 8
Dependent Claim
20 words
A composition according to claim 6 wherein the gelling agent comprises a combination of xanthan gum with a borate salt.
References Cited (Backward Citations)
US2972528A
Cited
US3527593A
Cited
US3484229A
Cited
US3620711A
Cited
US3803147A
Cited
US3723444A
Cited
US3714174A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-17 | 1979-05-19 | 1979-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-17 | 1983-05-19 | 1983-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-17 | 1987-05-19 | 1987-11-18 | $7700.00 | Window Closed / Lapsed |