US3937726A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Urea derivatives and their use as herbicides
Assignee: Hoechst AG
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Filing: 1970-05-26
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Granted: 1976-02-10
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Expires: 1990-05-26
Abstract
Abstract Compounds, useful as herbicides, of the formula ##SPC1## Wherein R 1 is haloalkyl, halocycloalkyl, haloalkenyl, or halocycloalkenyl; n 1 is 1 or 2; R 4 is halogen, trifluoromethyl, alkyl, or alkoxy; n 2 is 0, 1, 2, or 3; R 2 is hydrogen or alkyl; and R 3 is alkyl or alkoxy. Methods for making these compounds.
Inventors
- 👤 Otto Scherer
- 👤 Gerhard Horlein
- 👤 Hubert Schonowsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:43
CPC Classifications
C; C07; C07C; C07C275/00; C07C275/28; C07C275/32; C07C275/34
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
82 words
A compound of the formula ##SPC8## wherein R 1 is haloalkyl having 2 to 5 carbon atoms, the halogen being selected from the group consisting of fluorine, chlorine, and bromine; n 1 is 1 or 2; R 2 is hydrogen or alkyl having 1 to 4 carbon atoms; R 3 is alkyl having 1 to 4 carbon atoms; R 4 is halogen, trifluoromethyl, or alkyl or alkoxy having 1 to 3 carbon atoms; and n 2 is 0, 1, 2, or 3.
Claim 2
Dependent Claim
82 words
A compound of the formula ##SPC8## wherein R 1 is haloalkyl having 2 to 5 carbon atoms, the halogen being selected from the group consisting of fluorine, chlorine, and bromine; n 1 is 1 or 2; R 2 is hydrogen or alkyl having 1 to 4 carbon atoms; R 3 is alkyl having 1 to 4 carbon atoms; R 4 is halogen, trifluoromethyl, or alkyl or alkoxy having 1 to 3 carbon atoms; and n 2 is 0, 1, 2, or 3.
Claim 3
Dependent Claim
6 words
A compound having the formula ##SPC9##
Claim 4
Dependent Claim
6 words
A compound having the formula ##SPC9##
References Cited (Backward Citations)
US2050582A
Cited
FR1520220A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-02-09 | 1979-08-11 | 1980-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-09 | 1983-08-11 | 1984-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-09 | 1987-08-11 | 1988-02-10 | $7700.00 | Window Closed / Lapsed |