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Patent US2807991A successfully refreshed from Google Patents.
US2807991A
Expired / Lapsed
US
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Tractor-implement linkage
Assignee: Ford Motor Co
•
Filing: 1952-03-17
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Granted: 1957-10-01
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Expires: 1972-03-17
Abstract
No abstract record available.
Inventors
- 👤 Frederick D Sawyer
- 👤 Emery E Kuhary
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:04
CPC Classifications
A; A01; A01B; A01B59/00; A01B59/06; A01B59/066; A01B59/067
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1348995A
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US2130100A
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US2302842A
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US2413807A
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US2453390A
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US2531768A
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US2527355A
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US2577145A
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US2513783A
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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) | 1960-09-30 | 1961-04-01 | 1961-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-30 | 1965-04-01 | 1965-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-30 | 1969-04-01 | 1969-10-01 | $7700.00 | Window Closed / Lapsed |