US2813389A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Constant angle lift type tandem harrow
Assignee: Case LLC
•
Filing: 1953-12-07
•
Granted: 1957-11-19
•
Expires: 1973-12-07
Abstract
No abstract record available.
Inventors
- 👤 John R Padrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:08
CPC Classifications
A; A01; A01B; A01B21/00; A01B21/08; A01B21/083
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1104748A
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US1223145A
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US1449584A
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GB319500A
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US2143193A
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US2247534A
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US2266590A
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US2336410A
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US2601640A
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US2710569A
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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) | 1960-11-18 | 1961-05-20 | 1961-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-18 | 1965-05-20 | 1965-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-18 | 1969-05-20 | 1969-11-19 | $7700.00 | Window Closed / Lapsed |