Patent US2706439A successfully refreshed from Google Patents.
US2706439A
Expired / Lapsed
US
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Mechanical harrow
Assignee: Individual
•
Filing: 1950-06-26
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Granted: 1955-04-19
•
Expires: 1970-06-26
Abstract
No abstract record available.
Inventors
- 👤 Edmund G Ellingboe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:04
CPC Classifications
A; A01; A01B; A01B19/00; A01B19/02; A01B19/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US124036A
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US147874A
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US252806A
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US267916A
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US791884A
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US1067065A
Cited
US1544564A
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US2394741A
Cited
US2404651A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-04-18 | 1958-10-18 | 1959-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-04-18 | 1962-10-18 | 1963-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-04-18 | 1966-10-18 | 1967-04-19 | $7700.00 | Window Closed / Lapsed |