US2709365A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flowmeter
Assignee: Phillips Petroleum Co
•
Filing: 1949-07-18
•
Granted: 1955-05-31
•
Expires: 1969-07-18
Abstract
No abstract record available.
Inventors
- 👤 Raymond G Piety
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 12:33
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/68; E; E21; E21B; E21B47/00; E21B47/10; E21B47/103
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
111 words
A CONTROL CIRCUIT FOR A FLOWMETER INCLUDING HOT AND COLD THERMOCOUPLE JUNCTIONS AND A HEATER FOR INCREASING THE TEMPERATURE OF LIQUID CONTACTING THE HOT THERMOCOUPLE JUNCTION COMPRISING A CABLE FOR SUSPENDING SAID FLOWMETER IN BORE HOLE AND CONNECTING SAID FLOWMETER WITH APPARATUS AT THE SURFACE OF SAID BORE HOLE, SAID CABLE INCLUDING THREE CONDUCTORS; AN ALTERNATING CURRENT SOURCE AND A DIRECT CURRENT METER FORMING A PART OF THE SURFACE APPARATUS; A DIRECT CIRCUIT INCLUDING SAID METER, SAID THERMOCOUPLE JUNCTIONS, AND A PAIR OF SAID CABLE CONDUCTORS; AN ALTERNATING CURRENT CIRCUIT INCLUDING SAID SOURCE, SAID HEATER AND ONE OF SAID PAIR OF SAID CABLE CONDUCTORS AND THE THIRD OF SAID CONDUCTORS; AND
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) | 1958-05-30 | 1958-11-29 | 1959-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-30 | 1962-11-29 | 1963-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-30 | 1966-11-29 | 1967-05-31 | $7700.00 | Window Closed / Lapsed |