Patent US2939581A successfully refreshed from Google Patents.
US2939581A
Expired / Lapsed
US
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Combine cleaning shoe
Assignee: Massey Ferguson Inc
•
Filing: 1956-08-16
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Granted: 1960-06-07
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Expires: 1976-08-16
Abstract
No abstract record available.
Inventors
- 👤 Ashton Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:03
CPC Classifications
A; A01; A01F; A01F12/00; A01F12/44
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2732941A
Cited
US819177A
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US1397339A
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US1773914A
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US2156716A
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US2214277A
Cited
US2413382A
Cited
US2563081A
Cited
US2648441A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-07 | 1963-12-07 | 1964-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-07 | 1967-12-07 | 1968-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-07 | 1971-12-07 | 1972-06-07 | $7700.00 | Window Closed / Lapsed |