Patent US2838389A successfully refreshed from Google Patents.
US2838389A
Expired / Lapsed
US
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Method of combatting weeds
Assignee: Union Carbide Corp
•
Filing: 1952-09-03
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Granted: 1958-06-10
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Expires: 1972-09-03
Abstract
No abstract record available.
Inventors
- 👤 Donald M Yoder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:05
CPC Classifications
C; C07; C07D; C07D285/00; C07D285/15; C07D285/16; C07D285/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB555795A
Cited
US2537633A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-09 | 1961-12-09 | 1962-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-09 | 1965-12-09 | 1966-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-09 | 1969-12-09 | 1970-06-10 | $7700.00 | Window Closed / Lapsed |