US3623364A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Probe for indicating the flow of fluid
Assignee: Individual
•
Filing: 1968-12-16
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Granted: 1971-11-30
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Expires: 1988-12-16
Abstract
Abstract THE PROBE, IN ONE EMBODIMENT, COMPRISES A SENSOR WHOSE RESISTANCE VARIES WITH THE VARIATIONS IN TEMPERATURE, AN ELECTRIC HEATER IN HEAT EXCHANGE RELATIONSHIP WITH THE SENSOR, AND A CASING THAT ISOLATES THE SENSOR AND HEATER FROM DIRECT CONTACT WITH THE FLUID BEING PROBED. IN ANOTHER EMBODIMENT, THE PROBE, IN ADDITION TO THE FIRST METIONED SENSOR, INCLUDES AN AMBIENT REFERENCE SENSOR AND A HEATER FEEDBACK SIGNAL SENSOR, THE THREE SENSORS BEING IN HEAT EXCHANGE RELATIONSHIP.
Inventors
- 👤 Robert B Withrow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:47
CPC Classifications
G; G01; G01P; G01P5/00; G01P5/10
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) | 1974-11-29 | 1975-05-31 | 1975-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-29 | 1979-05-31 | 1979-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-29 | 1983-05-31 | 1983-11-30 | $7700.00 | Window Closed / Lapsed |