US3808262A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Urea derivatives
Assignee: Individual
•
Filing: 1971-01-22
•
Granted: 1974-04-30
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Expires: 1991-01-22
Abstract
Abstract NEW AND VALUABLE TRISUBSTITUTED UREA DERIVATIVES HAVING A GOOD HERBICIDAL ACTION AND A PROCESS FOR CONTROLLING THE GROWTH OF UNWANTED PLANTS WITH THESE COMPOUNDS.
Inventors
- 👤 B Zeeh
- 👤 A Fischer
- 👤 K Koenig
- 👤 H Kiefer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:47
CPC Classifications
C; C07; C07C; C07C323/00; C07C323/23; C07C323/39; C07C323/43; C07C323/44; C07C275/00; C07C275/28; C07C275/30; C07C275/32; C07C275/34; C07C2601/00; C07C2601/12; C07C2601/14; C07C2603/00; C07C2603/56; C07C2603/58; C07C2603/60; C07C2603/66; C07C2603/68
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) | 1977-04-29 | 1977-10-29 | 1978-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-29 | 1981-10-29 | 1982-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-29 | 1985-10-29 | 1986-04-30 | $7700.00 | Window Closed / Lapsed |