Patent US1894239A successfully refreshed from Google Patents.
US2641982A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Earthworking machine
Assignee: Individual
•
Filing: 1945-07-21
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Granted: 1953-06-16
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Expires: 1965-07-21
Abstract
No abstract record available.
Inventors
- 👤 Russell P Harshberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:36
CPC Classifications
E; E02; E02D; E02D3/00; E02D3/02; E02D3/046; E02D3/054; E01; E01C; E01C19/00; E01C19/22; E01C19/30; E01C19/34; E01C19/38
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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Cited
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Cited
US2042156A
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US2248182A
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US2323479A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-15 | 1956-12-15 | 1957-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-15 | 1960-12-15 | 1961-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-15 | 1964-12-15 | 1965-06-16 | $7700.00 | Window Closed / Lapsed |