US2646657A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple lift type disk harrow
Assignee: Individual
•
Filing: 1948-06-29
•
Granted: 1953-07-28
•
Expires: 1968-06-29
Abstract
No abstract record available.
Inventors
- 👤 Robertson Jackson Perry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:40
CPC Classifications
A; A01; A01B; A01B21/00; A01B21/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US470401A
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US792294A
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US2098116A
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US2141805A
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US2352963A
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US2398147A
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US2320624A
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US2440550A
Cited
US2377521A
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US2456693A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-27 | 1957-01-26 | 1957-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-27 | 1961-01-26 | 1961-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-27 | 1965-01-26 | 1965-07-28 | $7700.00 | Window Closed / Lapsed |