US2438707A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary tiller tooth and mounting
Assignee: Kropp Forge Co
•
Filing: 1944-04-13
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Granted: 1948-03-30
•
Expires: 1964-04-13
Abstract
No abstract record available.
Inventors
- 👤 Roy A Kropp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:12
CPC Classifications
A; A01; A01B; A01B33/00; A01B33/08; A01B33/14; A01B33/142; A01B33/144
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US324000A
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US328670A
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US622162A
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US1768289A
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US707624A
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US823240A
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US1676646A
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US2214702A
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US2221221A
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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) | 1951-03-30 | 1951-09-29 | 1952-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-03-30 | 1955-09-29 | 1956-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-03-30 | 1959-09-29 | 1960-03-30 | $7700.00 | Window Closed / Lapsed |