US2909869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Direct field seeding
Assignee: Zonolite Co
•
Filing: 1956-05-28
•
Granted: 1959-10-27
•
Expires: 1976-05-28
Abstract
No abstract record available.
Inventors
- 👤 Harry A Dresser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:36
CPC Classifications
A; A01; A01C; A01C7/00; Y; Y10; Y10S; Y10S111/00; Y10S111/90; Y10S71/00; Y10S71/904
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1608917A
Cited
US1735835A
Cited
US2240859A
Cited
US2403435A
Cited
US2419073A
Cited
US2625529A
Cited
US2765290A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-26 | 1963-04-27 | 1963-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-26 | 1967-04-27 | 1967-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-26 | 1971-04-27 | 1971-10-27 | $7700.00 | Window Closed / Lapsed |