Patent US2498321A successfully refreshed from Google Patents.
US2498321A
Expired / Lapsed
US
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Portable excavator
Assignee: OSGOOD CO
•
Filing: 1946-07-24
•
Granted: 1950-02-21
•
Expires: 1966-07-24
Abstract
No abstract record available.
Inventors
- 👤 Fred L White
- 👤 Earl I Beicher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:29
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/28; E02F3/30; E02F3/304
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1457301A
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US1529394A
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US1564791A
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US1533061A
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US1536609A
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US1733753A
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US1891351A
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US2037958A
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US2420990A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-20 | 1953-08-22 | 1954-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-20 | 1957-08-22 | 1958-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-20 | 1961-08-22 | 1962-02-21 | $7700.00 | Window Closed / Lapsed |