Patent US1305440A successfully refreshed from Google Patents.
US2640286A
Expired / Lapsed
US
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Ditch cleaner and ridger
Assignee: Individual
•
Filing: 1950-04-11
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Granted: 1953-06-02
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Expires: 1970-04-11
Abstract
No abstract record available.
Inventors
- 👤 Ernest V Briscoe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:27
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/76; E02F3/7663; E02F3/7686
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1763680A
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US1868648A
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US2032088A
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US1972498A
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US2134848A
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US2312255A
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US2279641A
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US2491797A
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US2512114A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-01 | 1956-12-01 | 1957-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-01 | 1960-12-01 | 1961-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-01 | 1964-12-01 | 1965-06-02 | $7700.00 | Window Closed / Lapsed |