Patent US2543496A successfully refreshed from Google Patents.
US2543496A
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US
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Shovel attachment for tractors
Assignee: WAIN ROY CORP
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Filing: 1946-06-13
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Granted: 1951-02-27
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Expires: 1966-06-13
Abstract
No abstract record available.
Inventors
- 👤 Vaino J Holopainen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:20
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/28; E02F3/34
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) | 1954-02-26 | 1954-08-28 | 1955-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-26 | 1958-08-28 | 1959-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-26 | 1962-08-28 | 1963-02-27 | $7700.00 | Window Closed / Lapsed |