Patent US2768759A successfully refreshed from Google Patents.
US2768759A
Expired / Lapsed
US
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Power operated shovels
Assignee: WAIN ROY CORP
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Filing: 1953-10-20
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Granted: 1956-10-30
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Expires: 1973-10-20
Abstract
No abstract record available.
Inventors
- 👤 Vaino J Holopainen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:37
CPC Classifications
E; E02; E02F; E02F9/00; E02F9/08; E02F9/085; E02F3/00; E02F3/04; E02F3/28; E02F3/30; E02F3/308; E02F3/36; E02F3/38; E02F3/382; E02F3/384
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-30 | 1960-04-30 | 1960-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-30 | 1964-04-30 | 1964-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-30 | 1968-04-30 | 1968-10-30 | $7700.00 | Window Closed / Lapsed |