Patent US2893134A successfully refreshed from Google Patents.
US2893134A
Expired / Lapsed
US
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Automatic leveling control and clinometer
Assignee: Preco LLC
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Filing: 1954-03-22
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Granted: 1959-07-07
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Expires: 1974-03-22
Abstract
No abstract record available.
Inventors
- 👤 Reeford P Shea
- 👤 Raudenbush Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:02
CPC Classifications
G; G01; G01C; G01C9/00; G01C9/18; G01C9/20; G01C9/22; E; E01; E01C; E01C19/00; E01C19/004
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1342594A
Cited
US1506192A
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CH135332A
Cited
US2023748A
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US2256833A
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US2456619A
Cited
US2412263A
Cited
US2455394A
Cited
US2478956A
Cited
US2636290A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-07-06 | 1963-01-05 | 1963-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-06 | 1967-01-05 | 1967-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-06 | 1971-01-05 | 1971-07-07 | $7700.00 | Window Closed / Lapsed |