US3138023A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Level indicator and control
Assignee: Beloit Corp
•
Filing: 1960-06-29
•
Granted: 1964-06-23
•
Expires: 1980-06-29
Abstract
No abstract record available.
Inventors
- 👤 Robert S Washburn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:33
CPC Classifications
G; G05; G05D; G05D9/00; G05D9/12; G01; G01F; G01F23/00; G01F23/22; G01F23/24; G01F23/246; G01F23/247
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
A LIQUID LEVEL INDICATOR FOR A VESSEL HAVING AN UPWARDLY EXTENDING OUTER WALL AND ADAPTED FOR CONTAINING VARYING QUANTITIES OF LIQUID OVER A RANGE OF LEVELS, COMPRISING IN COMBINATION, A CLOSED CELL MEANS HAVING AN ELONGATED HEAT TRANSFER SURFACE FOR BEARING AGAINST THE OUTER SURFACE OF SAID VESSEL WALL TO BE IN HEAT TRANSFER RELATION THEREWITH OPPOSITE THE LIQUID WITHIN THE VESSEL AT LOCATIONS EXTENDING OVER SAID RANGE OF LEVELS,
Claim 2
Dependent Claim
70 words
A LIQUID LEVEL INDICATOR FOR A VESSEL HAVING AN UPWARDLY EXTENDING OUTER WALL AND ADAPTED FOR CONTAINING VARYING QUANTITIES OF LIQUID OVER A RANGE OF LEVELS, COMPRISING IN COMBINATION, A CLOSED CELL MEANS HAVING AN ELONGATED HEAT TRANSFER SURFACE FOR BEARING AGAINST THE OUTER SURFACE OF SAID VESSEL WALL TO BE IN HEAT TRANSFER RELATION THEREWITH OPPOSITE THE LIQUID WITHIN THE VESSEL AT LOCATIONS EXTENDING OVER SAID RANGE OF LEVELS,
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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) | 1967-06-23 | 1967-12-23 | 1968-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-23 | 1971-12-23 | 1972-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-23 | 1975-12-23 | 1976-06-23 | $7700.00 | Window Closed / Lapsed |