US2909855A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Excavating apparatus
Assignee: UNITED ELECTRIC COAL Cos
•
Filing: 1956-07-24
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Granted: 1959-10-27
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Expires: 1976-07-24
Abstract
No abstract record available.
Inventors
- 👤 Frank F Kolbe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:25
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/18; E02F3/22; E02F3/24; E02F3/241; E02F3/181
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
NL21144C
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US566318A
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US1005544A
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US1164448A
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US1858327A
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US2002239A
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US2309157A
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US2364666A
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US2731742A
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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) | 1962-10-26 | 1963-04-27 | 1963-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-26 | 1967-04-27 | 1967-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-26 | 1971-04-27 | 1971-10-27 | $7700.00 | Window Closed / Lapsed |