Patent US2663133A successfully refreshed from Google Patents.
US2663133A
Expired / Lapsed
US
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Mower attachment for tractors
Assignee: H F DAVIS TRACTOR Co
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Filing: 1949-03-12
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Granted: 1953-12-22
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Expires: 1969-03-12
Abstract
No abstract record available.
Inventors
- 👤 Ray B Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:01
CPC Classifications
A; A01; A01D; A01D34/00; A01D34/835; A01D34/86; A01D34/866
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1728150A
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US1958405A
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US1956007A
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US2171761A
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US2170573A
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US2291987A
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US2328838A
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US2311117A
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US2324563A
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US2457693A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-21 | 1957-06-22 | 1957-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-21 | 1961-06-22 | 1961-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-21 | 1965-06-22 | 1965-12-22 | $7700.00 | Window Closed / Lapsed |