US3067657A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Earth tamper
Assignee: Individual
•
Filing: 1957-06-21
•
Granted: 1962-12-11
•
Expires: 1977-06-21
Abstract
No abstract record available.
Inventors
- 👤 Kenneth R Wiekhorst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:31
CPC Classifications
E; E01; E01C; E01C23/00; E01C23/06; E01C23/12; E01C23/122; E01C23/124; E02; E02D; E02D3/00; E02D3/02; E02D3/046
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1938459A
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US2166479A
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US2234831A
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US2304845A
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US2350223A
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US2356255A
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US2783025A
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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) | 1965-12-10 | 1966-06-11 | 1966-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-10 | 1970-06-11 | 1970-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-10 | 1974-06-11 | 1974-12-11 | $7700.00 | Window Closed / Lapsed |