US2354945A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid level sensitive apparatus
Assignee: WHEELCO INSTR Co
•
Filing: 1939-04-11
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Granted: 1944-08-01
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Expires: 1959-04-11
Abstract
No abstract record available.
Inventors
- 👤 Theodore A Cohen
- 👤 Hans J Ostermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:40
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/22; G01F23/24; G01F23/245; H; H01; H01K; H01K3/00; H01K3/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1947-08-01 | 1948-01-31 | 1948-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1951-08-01 | 1952-01-31 | 1952-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1955-08-01 | 1956-01-31 | 1956-08-01 | $7700.00 | Window Closed / Lapsed |