Patent US2791044A successfully refreshed from Google Patents.
US2791044A
Expired / Lapsed
US
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Dirt handling apparatus
Assignee: Individual
•
Filing: 1953-01-27
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Granted: 1957-05-07
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Expires: 1973-01-27
Abstract
No abstract record available.
Inventors
- 👤 James E Hancock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:33
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/64; E02F3/65; E02F3/654; E02F3/656; E02F3/6454; E02F3/6472; E02F3/655
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE21170E
Cited
US242481A
Cited
US645825A
Cited
US649017A
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US1399876A
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US1486376A
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US1828526A
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US2207424A
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US2243831A
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US2293328A
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US2365387A
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US2510424A
Cited
US2514091A
Cited
US2546907A
Cited
US2569719A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-05-06 | 1960-11-05 | 1961-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-06 | 1964-11-05 | 1965-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-06 | 1968-11-05 | 1969-05-07 | $7700.00 | Window Closed / Lapsed |