Patent US3620711A successfully refreshed from Google Patents.
US3620711A
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Herbicidal process and compositions for use therein
Assignee: Imperial Chemical Industries Ltd
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Filing: 1968-07-11
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Granted: 1971-11-16
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Expires: 1988-07-11
Abstract
Abstract Herbicidally effective complexes of 4,4''- and 2,2'' -bipyridylium quaternary salts with salts of transition metals.
Inventors
- 👤 Brian Graham White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:32
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/06; C07D213/22
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
29 words
A method according to claim 1 in which the herbicidal bipyridylium ion is selected from the group consisting of 1,1''-dimethyl-4,4''-bipyridylium ion, 1,1''-ethylene- 2,2''-bipyridylium ion, and 1,1''-di(2 -hydroxyethyl) -4,4''-bipyridylium ion.
Claim 2
Dependent Claim
26 words
A method according to claim 2 in which the transition metal is selected from the group consisting of metals of atomic number 25 t0 28 inclusive.
Claim 3
Dependent Claim
85 words
A solid herbicidal composition, consisting essentially of an effective amount of a complex of a herbicidal, 2,2''- or 4,4''-bipyridylium ion with a transition metal selected from the group consisting of titanium, manganese, iron, cobalt, copper, nickel, cadmium, zinc, mercury, arsenic, selenium, antimony, tin, silver, lead and bismuth and a ligand selected from the group consisting of chloride, bromide, iodide, cyanide, cyanate, thiocyanate, isothiocyanate and selenocyanate, in admixutre with an inorganic salt containing water of crystallization acquired during initial mixing of the salt with the complex.
Claim 4
Dependent Claim
25 words
A solid herbicidal composition as claimed in claim 4, in which the salt containing water of crystallization is selected from magnesium sulfate and sodium sulfate.
Claim 5
Dependent Claim
14 words
A solid herbicidal composition as claimed in claim 5, which includes a wetting agent.
Claim 6
Dependent Claim
48 words
A herbicidal composition according to claim 4 wherein the herbicidal bipyridylium ion is selected from the group consisting of 1,1''-dimethyl-1,1''-bipyridylium ion, 1,1''-ethylene-2,2''-bipyridylium ion, and 1,1''di(2 hydroxyethyl)- 4,4''-bipyridylium ion and the transition metal ion is selected from the Group consisting of metals of atomic number 25 to 28 inclusive.
Claim 7
Dependent Claim
25 words
A herbicidal composition according to claim 7 wherein the herbicidal bipyridylium ion is the 1,1''-dimethyl 4,4''-bipyridylium ion and the transition metal is manganese and cobalt
Claim 8
Dependent Claim
76 words
A solid herbicidal composition consisting essentially of an effective amount of a complex of a herbicidal 2,2'' or 4,4''-bipyridylium ion with a transition metal selected from the group consisting of titanium, manganese, iron, cobalt, copper, nickel, cadmium, zinc, mercury, arsenic, selenium, antimony, tin, silver, lead and bismuth, and ligand selected from the group consisting of chloride, bromide, iodide, cyanide, cyanate, thiocyanate, isothiocyanate and selenocyanate, in admixture with a major proportion of a carrier for said complex.
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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) | 1974-11-15 | 1975-05-17 | 1975-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-15 | 1979-05-17 | 1979-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-15 | 1983-05-17 | 1983-11-16 | $7700.00 | Window Closed / Lapsed |