Patent US2801012A successfully refreshed from Google Patents.
US2801012A
Expired / Lapsed
US
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Digging machine
Assignee: Individual
•
Filing: 1954-07-22
•
Granted: 1957-07-30
•
Expires: 1974-07-22
Abstract
No abstract record available.
Inventors
- 👤 Lester C Lederer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:00
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/28; E02F3/36; E02F3/38; E02F3/382; E02F3/384
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2678140A
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US2582142A
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US2571028A
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US2652940A
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US2678741A
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US2655269A
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US2718312A
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US2718718A
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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) | 1960-07-29 | 1961-01-28 | 1961-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-29 | 1965-01-28 | 1965-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-29 | 1969-01-28 | 1969-07-30 | $7700.00 | Window Closed / Lapsed |