Patent US2834489A successfully refreshed from Google Patents.
US2834489A
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US
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Mechanical shovel
Assignee: MASSEY HARRIS FERGUSON Inc
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Filing: 1956-06-21
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Granted: 1958-05-13
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Expires: 1976-06-21
Abstract
No abstract record available.
Inventors
- 👤 Charles J Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:38
CPC Classifications
E; E02; E02F; E02F9/00; E02F9/16; E02F9/166; E02F3/00; E02F3/04; E02F3/28; E02F3/30; E02F3/32; E02F3/36; E02F3/38; E02F3/382; E02F3/384; E02F9/08; E02F9/085
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2519910A
Cited
US2528588A
Cited
FR1014229A
Cited
US2702137A
Cited
GB718803A
Cited
US2669367A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-12 | 1961-11-11 | 1962-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-12 | 1965-11-11 | 1966-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-12 | 1969-11-11 | 1970-05-13 | $7700.00 | Window Closed / Lapsed |