US2575428A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic two-way plow
Assignee: ALICE MARIAN MELLEN
•
Filing: 1945-03-12
•
Granted: 1951-11-20
•
Expires: 1965-03-12
Abstract
No abstract record available.
Inventors
- 👤 Rogers Harry
- 👤 Mellen William Fisk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:45
CPC Classifications
A; A01; A01B; A01B3/00; A01B3/36; A01B3/40; A01B3/44
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-11-19 | 1955-05-21 | 1955-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-19 | 1959-05-21 | 1959-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-19 | 1963-05-21 | 1963-11-20 | $7700.00 | Window Closed / Lapsed |