Patent US1807150A successfully refreshed from Google Patents.
US1807150A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Land clearing machine
Assignee: Individual
•
Filing: 1930-02-05
•
Granted: 1931-05-26
•
Expires: 1950-02-05
Abstract
No abstract record available.
Inventors
- 👤 John H Caldwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:51
CPC Classifications
A; A01; A01G; A01G23/00; A01G23/02; A01G23/06
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1934-05-25 | 1934-11-24 | 1935-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1938-05-25 | 1938-11-24 | 1939-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1942-05-25 | 1942-11-24 | 1943-05-26 | $7700.00 | Window Closed / Lapsed |