Patent US2636290A successfully refreshed from Google Patents.
US2636290A
Expired / Lapsed
US
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Automatic blade control for road graders and the like
Assignee: Individual
•
Filing: 1951-02-20
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Granted: 1953-04-28
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Expires: 1971-02-20
Abstract
No abstract record available.
Inventors
- 👤 Bell Frank Victor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:18
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/76; E02F3/80; E02F3/84; E02F3/844; Y; Y10; Y10S; Y10S37/00; Y10S37/906
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US705731A
Cited
US2278081A
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US2284550A
Cited
US2268017A
Cited
US2359961A
Cited
US2520266A
Cited
US2572910A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-04-27 | 1956-10-27 | 1957-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-27 | 1960-10-27 | 1961-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-27 | 1964-10-27 | 1965-04-28 | $7700.00 | Window Closed / Lapsed |