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Patent US2991891A successfully refreshed from Google Patents.
US2991891A
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US
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Tractor mounted loading attachment
Assignee: Koehring Co
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Filing: 1958-02-11
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Granted: 1961-07-11
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Expires: 1978-02-11
Abstract
No abstract record available.
Inventors
- 👤 Marion C Wills
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:30
CPC Classifications
B; B66; B66C; B66C23/00; B66C23/62; B66C23/72; B66C23/78; B66C23/80; B66C13/00; B66C13/18; B66C3/00; B66C3/14; B66C3/16; B66C3/20; B66C2700/00; B66C2700/06; B66C2700/062; B66C2700/065
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1985285A
Cited
US2637447A
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US2725996A
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US2768759A
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US2833429A
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US2847134A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-10 | 1965-01-09 | 1965-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-10 | 1969-01-09 | 1969-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-10 | 1973-01-09 | 1973-07-11 | $7700.00 | Window Closed / Lapsed |