US3707556A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bis-meta-phenylene ureas
Assignee: Zeneca Inc
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Filing: 1970-10-12
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Granted: 1972-12-26
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Expires: 1990-10-12
Abstract
Abstract IN WHICH X REPRESENTS OXYGEN OR SULFUR, R1 REPRESENTS LOWER ALKYL OR LOWER ALKENYL, R2 IS HYDROGEN, R3 REPRESENTS ALKYL, ALKENYL, CHLOROACETYL, PHENYL AND CHLORO SUBSTITUTED PHENYL, R4 REPRESENTS HYDROGEN, LOWER ALKYL AND FURFUYL, AND Z REPRESENTS HYDROGEN OR LOWER ALKYL. THE COMPOUNDS OF THIS INVENTION ARE USEFUL AS HERBICIDES. 1-(R1-N(-R2)-C(=X)-NH-),3-(R3-N(-R4)-CO-NH-),Z-BENZENE BIS-META-PHENYLENE UREAS HAVING THE FORMULA:
Inventors
- 👤 Eugene G Teach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:41
CPC Classifications
C; C07; C07C; C07C275/00; C07C275/28; C07C275/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-26 | 1976-06-26 | 1976-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-26 | 1980-06-26 | 1980-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-26 | 1984-06-26 | 1984-12-26 | $7700.00 | Window Closed / Lapsed |