Patent US2679873A successfully refreshed from Google Patents.
US2679873A
Expired / Lapsed
US
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Knife mounting for forage choppers
Assignee: Unisys Corp
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Filing: 1951-05-17
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Granted: 1954-06-01
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Expires: 1971-05-17
Abstract
No abstract record available.
Inventors
- 👤 George B Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:56
CPC Classifications
A; A01; A01F; A01F29/00; A01F29/09; A01F29/095
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1247307A
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US1249020A
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US1327346A
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US1461764A
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US1793476A
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US2115234A
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US2235919A
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US2298482A
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US2312612A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-31 | 1957-11-30 | 1958-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-31 | 1961-11-30 | 1962-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-31 | 1965-11-30 | 1966-06-01 | $7700.00 | Window Closed / Lapsed |