Patent US2916836A successfully refreshed from Google Patents.
US2916836A
Expired / Lapsed
US
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Photoelectric automatic blade level control
Assignee: Individual
•
Filing: 1955-06-24
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Granted: 1959-12-15
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Expires: 1975-06-24
Abstract
No abstract record available.
Inventors
- 👤 Karl J Stewart
- 👤 Donald L Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:02
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/76; E02F3/80; E02F3/84; E02F3/844; E02F3/847; G; G01; G01C; G01C15/00; G01C15/002
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2366939A
Cited
US2283036A
Cited
US2268017A
Cited
US2489219A
Cited
US2636290A
Cited
US2796685A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-14 | 1963-06-15 | 1963-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-14 | 1967-06-15 | 1967-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-14 | 1971-06-15 | 1971-12-15 | $7700.00 | Window Closed / Lapsed |