US2505280A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ridge cutting attachment for tractor cultivators
Assignee: Individual
•
Filing: 1946-06-27
•
Granted: 1950-04-25
•
Expires: 1966-06-27
Abstract
No abstract record available.
Inventors
- 👤 John F Ellinghuysen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:30
CPC Classifications
A; A01; A01B; A01B63/00; A01B63/02; A01B63/04; A01B63/045; A01B35/00; A01B35/18; A01B59/00; A01B59/04; A01B59/048; A01C; A01C5/00; A01C5/04
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1262966A
Cited
US1383409A
Cited
US1798958A
Cited
US1868307A
Cited
US2179793A
Cited
US2347373A
Cited
US2339468A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-04-24 | 1953-10-24 | 1954-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-24 | 1957-10-24 | 1958-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-24 | 1961-10-24 | 1962-04-25 | $7700.00 | Window Closed / Lapsed |