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US2501231A
Expired / Lapsed
US
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Hydraulic tractor loader attachment
Assignee: Individual
•
Filing: 1948-02-09
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Granted: 1950-03-21
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Expires: 1968-02-09
Abstract
No abstract record available.
Inventors
- 👤 Paul S Mefferd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:08
CPC Classifications
A; A01; A01C; A01C3/00; A01C3/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2242860A
Cited
US2319921A
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US2397303A
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US2391224A
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US2389029A
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US2393435A
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US2451101A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-20 | 1953-09-19 | 1954-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-20 | 1957-09-19 | 1958-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-20 | 1961-09-19 | 1962-03-21 | $7700.00 | Window Closed / Lapsed |