Patent US2669039A successfully refreshed from Google Patents.
US2669039A
Expired / Lapsed
US
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Rotary wheel-type ditching machine
Assignee: Individual
•
Filing: 1948-08-30
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Granted: 1954-02-16
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Expires: 1968-08-30
Abstract
No abstract record available.
Inventors
- 👤 Benjamin E Bunnell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:22
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/18; E02F3/20; E02F3/186
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1005691A
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US1623910A
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US1848554A
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US759610A
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US1017316A
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US1411999A
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US1528969A
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US2093758A
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US2154353A
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US2218222A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-15 | 1957-08-17 | 1958-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-15 | 1961-08-17 | 1962-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-15 | 1965-08-17 | 1966-02-16 | $7700.00 | Window Closed / Lapsed |