US2529809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic power lift trip for two-way plows
Assignee: ALICE MARIAN MELLEN
•
Filing: 1947-11-24
•
Granted: 1950-11-14
•
Expires: 1967-11-24
Abstract
No abstract record available.
Inventors
- 👤 Mellen William Fisk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:21
CPC Classifications
A; A01; A01B; A01B3/00; A01B3/36; A01B3/40; A01B3/44; Y; Y10; Y10T; Y10T74/00; Y10T74/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US471111A
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US520281A
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CH84388A
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FR638191A
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US2247534A
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US2227366A
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GB544041A
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US2352466A
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US2358964A
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US2401837A
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US2437879A
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US2457163A
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US2474731A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-13 | 1954-05-15 | 1954-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-13 | 1958-05-15 | 1958-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-13 | 1962-05-15 | 1962-11-14 | $7700.00 | Window Closed / Lapsed |