US3000121A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic vertical control of earth moving machines
Assignee: Collins Radio Co
•
Filing: 1956-05-21
•
Granted: 1961-09-19
•
Expires: 1976-05-21
Abstract
No abstract record available.
Inventors
- 👤 David O Martin
- 👤 Frank J Ocnaschek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:58
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/76; E02F3/80; E02F3/84; E02F3/844; E02F3/847
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2796685A
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US2817764A
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US2916836A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-09-18 | 1965-03-20 | 1965-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-18 | 1969-03-20 | 1969-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-18 | 1973-03-20 | 1973-09-19 | $7700.00 | Window Closed / Lapsed |