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Patent US2278081A successfully refreshed from Google Patents.
US2278081A
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Leveling mechanism
Assignee: ELMER H HAYS
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Filing: 1939-09-29
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Granted: 1942-03-31
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Expires: 1959-09-29
Abstract
No abstract record available.
Inventors
- 👤 Kramer Harold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:20
CPC Classifications
B; B60; B60G; B60G17/00; B60G17/015; B60G17/019; B60G17/01908; B60G17/01925; B60G21/00; B60G21/02; B60G21/04; B60G21/05; B60G21/055; B60G21/0551; B60G21/0553; E; E02; E02F; E02F9/00; E02F9/02; E02F9/028; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/8667; Y10T137/86694; Y10T137/86702
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1945-03-30 | 1945-09-29 | 1946-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-03-30 | 1949-09-29 | 1950-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-03-30 | 1953-09-29 | 1954-03-31 | $7700.00 | Window Closed / Lapsed |