Patent US2811397A successfully refreshed from Google Patents.
US2811397A
Expired / Lapsed
US
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Unit for adjusting tracks of crawler type tractors
Assignee: Individual
•
Filing: 1955-08-18
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Granted: 1957-10-29
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Expires: 1975-08-18
Abstract
No abstract record available.
Inventors
- 👤 Frank W Cline
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:03
CPC Classifications
B; B62; B62D; B62D55/00; B62D55/08; B62D55/30; Y; Y10; Y10S; Y10S277/00; Y10S277/91
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2387181A
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US2388422A
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US2392123A
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US2673130A
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US2659194A
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US2690939A
Cited
US2726908A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-28 | 1961-04-29 | 1961-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-28 | 1965-04-29 | 1965-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-28 | 1969-04-29 | 1969-10-29 | $7700.00 | Window Closed / Lapsed |