US3973944A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pest control agent
Assignee: Merck Patent GmbH
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Filing: 1970-12-15
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Granted: 1976-08-10
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Expires: 1990-12-15
Abstract
Abstract 3-Cyano-4-phenyl-5-dimethylaminomethylene-5H-furanone-(2) and compositions containing the same, are useful for controlling the growth of undesirable pest plant growth, e.g., algae, weeds and undesirable grasses, when applied to the locus to be protected.
Inventors
- 👤 Dietrich Erdmann
- 👤 Gerhart Schneider
- 👤 Wolfgang Koch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:50
CPC Classifications
A; A01; A01N; A01N43/00; A01N43/02; A01N43/04; A01N43/06; A01N43/08
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
29 words
A composition for controlling undesired plant growth comprising, as an active ingredient a herbicidal effective amount of 3-cyano-4-phenyl-5-dimethylaminomethylene-5H-furanone-(2) in admixture with a finely divided inert insoluble solid carrier vehicle.
Claim 2
Dependent Claim
29 words
A composition for controlling undesired plant growth comprising, as an active ingredient a herbicidal effective amount of 3-cyano-4-phenyl-5-dimethylaminomethylene-5H-furanone-(2) in admixture with a finely divided inert insoluble solid carrier vehicle.
Claim 3
Dependent Claim
20 words
A composition according to claim 1 wherein the 3-cyano-4-phenyl-5-dimethylaminomethylene-5H-furanone-(2) is present in an amount between 5 and 80% by weight.
Claim 4
Dependent Claim
36 words
A composition according to claim 1 wherein said inert solid carrier is present in an amount from 20 to 98% by weight and is selected from the group consisting of hydrated silica, calcium silicate and bentonite.
Claim 5
Dependent Claim
14 words
A composition according to claim 1 further comprising a wetting, dispersing or emulsifying agent.
Claim 6
Independent Claim
22 words
A method for controlling undesired plant growth which comprises applying to the locus to be protected a herbicidal effective amount of 3-cyano-4-phenyl-5-dimethylaminomethylene-5H-furanone-(2).
Claim 7
Independent Claim
22 words
A method for controlling undesired plant growth which comprises applying to the locus to be protected a herbicidal effective amount of 3-cyano-4-phenyl-5-dimethylaminomethylene-5H-furanone-(2).
Claim 8
Dependent Claim
21 words
A method according to claim 5 wherein 3-cyano-4-phenyl-5-dimethylaminomethylene-5H-furanone-(2) is applied to soil at the rate of about 0.45 to 90 lbs./acre.
Claim 9
Dependent Claim
20 words
A method according to claim 6 wherein the rate of application to the soil is about 0.9 to 18 lbs./acre.
Claim 10
Dependent Claim
17 words
A method according to claim 5 wherein the 3-cyano-4-phenyl-5-dimethylaminomethylene-5H-furanone-(2) is applied to an area under rice cultivation.
Claim 11
Dependent Claim
18 words
A method according to claim 8 wherein the 3-cyano-4-phenyl-5-dimethylaminomethylene-5H-furanone-(2) is applied prior to the emergence of undesired grasses.
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) | 1979-08-10 | 1980-02-09 | 1980-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-10 | 1984-02-09 | 1984-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-10 | 1988-02-09 | 1988-08-10 | $7700.00 | Window Closed / Lapsed |