Patent US2551314A successfully refreshed from Google Patents.
US2551314A
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US
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Tractor with leveling device
Assignee: Individual
•
Filing: 1946-09-27
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Granted: 1951-05-01
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Expires: 1966-09-27
Abstract
No abstract record available.
Inventors
- 👤 Lawrence C Burton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:47
CPC Classifications
B; B62; B62D; B62D49/00; B62D49/08; Y; Y10; Y10T; Y10T137/00; Y10T137/0753; Y10T137/0898
Claims Analysis
Total Claims: 0
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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) | 1954-04-30 | 1954-10-30 | 1955-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-30 | 1958-10-30 | 1959-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-30 | 1962-10-30 | 1963-05-01 | $7700.00 | Window Closed / Lapsed |