US2911828A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for determining liquid level and interface position
Assignee: Unisys Corp
•
Filing: 1956-03-05
•
Granted: 1959-11-10
•
Expires: 1976-03-05
Abstract
No abstract record available.
Inventors
- 👤 William T Keating
- 👤 Richter Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:03
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/30; G01F23/64; G01F23/72; G01F23/0038
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1658449A
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US1826024A
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US1880563A
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US2072223A
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US2026299A
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US2282538A
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US2664011A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-09 | 1963-05-11 | 1963-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-09 | 1967-05-11 | 1967-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-09 | 1971-05-11 | 1971-11-10 | $7700.00 | Window Closed / Lapsed |