Patent US3164991A successfully refreshed from Google Patents.
US3164991A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid level indicator
Assignee: Individual
•
Filing: 1963-02-05
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Granted: 1965-01-12
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Expires: 1983-02-05
Abstract
No abstract record available.
Inventors
- 👤 Robert E Potthoff
- 👤 John F Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:14
CPC Classifications
G; G01; G01F; G01F23/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A DEVICE FOR DETERMINING THE LOCATION OF A TWOPHASE REGION BETWEEN A BODY OF LIQUID AND VAPOR OVER THE LIQUID IN A PRESSURE VESSEL, SAID DEVICE COMPRISING A GENERALLY VERTICAL TUBE EXTENDING IN THE TWO-PHASE REGION AND HAVING A CLOSED END AND A SLIDE ORIFICE NEAR THE CLOSED END, A CONDENSER CONNECTED WITH THE OTHER END OF THE TUBE, AND A FLOW METER CONNECTED WITH THE CONDENSER.
Claim 2
Independent Claim
67 words
A DEVICE FOR DETERMINING THE LOCATION OF A TWOPHASE REGION BETWEEN A BODY OF LIQUID AND VAPOR OVER THE LIQUID IN A PRESSURE VESSEL, SAID DEVICE COMPRISING A GENERALLY VERTICAL TUBE EXTENDING IN THE TWO-PHASE REGION AND HAVING A CLOSED END AND A SLIDE ORIFICE NEAR THE CLOSED END, A CONDENSER CONNECTED WITH THE OTHER END OF THE TUBE, AND A FLOW METER CONNECTED WITH THE CONDENSER.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-01-12 | 1968-07-13 | 1969-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-01-12 | 1972-07-13 | 1973-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-01-12 | 1976-07-13 | 1977-01-12 | $7700.00 | Window Closed / Lapsed |