Patent US2531993A successfully refreshed from Google Patents.
US2531993A
Expired / Lapsed
US
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Tractor operated loading device
Assignee: Individual
•
Filing: 1947-03-21
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Granted: 1950-11-28
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Expires: 1967-03-21
Abstract
No abstract record available.
Inventors
- 👤 Louie W Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:23
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/28; E02F3/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1623194A
Cited
US1597620A
Cited
US2109388A
Cited
US2264050A
Cited
US2413096A
Cited
US2413097A
Cited
US2441070A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-27 | 1954-05-29 | 1954-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-27 | 1958-05-29 | 1958-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-27 | 1962-05-29 | 1962-11-28 | $7700.00 | Window Closed / Lapsed |