US2857833A
Expired / Lapsed
US
⏱️ 0.0 years remaining
I-beam mounting for earth tiller
Assignee: Individual
•
Filing: 1954-11-26
•
Granted: 1958-10-28
•
Expires: 1974-11-26
Abstract
No abstract record available.
Inventors
- 👤 Elmer A Rolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:12
CPC Classifications
A; A01; A01B; A01B35/00; A01B35/20; A01B35/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US789305A
Cited
US894787A
Cited
US917603A
Cited
GB253298A
Cited
US1865651A
Cited
US2493811A
Cited
US2627798A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-27 | 1962-04-28 | 1962-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-27 | 1966-04-28 | 1966-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-27 | 1970-04-28 | 1970-10-28 | $7700.00 | Window Closed / Lapsed |