US2474731A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-way plow
Assignee: ALICE MARIAN MELLEN
•
Filing: 1945-05-05
•
Granted: 1949-06-28
•
Expires: 1965-05-05
Abstract
No abstract record available.
Inventors
- 👤 Russell T Evans
- 👤 John H Clasen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:12
CPC Classifications
A; A01; A01B; A01B3/00; A01B3/36; A01B3/40; A01B3/44; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20576; Y10T74/20636; Y10T74/20666
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US267630A
Cited
US1303427A
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US2187380A
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US2256039A
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US2249861A
Cited
US2354084A
Cited
US2339468A
Cited
US2401837A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-27 | 1952-12-27 | 1953-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-27 | 1956-12-27 | 1957-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-27 | 1960-12-27 | 1961-06-28 | $7700.00 | Window Closed / Lapsed |