Patent US2569550A successfully refreshed from Google Patents.
US3554004A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluidic gas ratio meter
Assignee: General Electric Co
•
Filing: 1968-02-23
•
Granted: 1971-01-12
•
Expires: 1988-02-23
Abstract
Abstract A FLUDIC DEVICE FOR MEASURING THE RATIO BY VOLUME OF TWO KNOWN GASES OR FOR DETECTING THE CONTAMINATION OF A GAS INCLUDES A FLUID AMPLIFIER OSCILLATOR CIRCUIT AND READOUT MEANS. A GASEOUS MEDIUM BENG MONITORED IS SUPPLIED AS THE POWER FLUID TO A FLUDIC OSCILLATOR WHOSE FREQUENCY IS DEPENDENT UPON THE GAS CONSTANT OF THE GAS OR GASES. A PROPORTIONAL RELATIONSHIP EXISTS BETWEEN OSCILLATOR FREQUENCY AND GAS COMPOSITION SUCH THAT A MEANS FOR READING OUT THE OSCILLATOR FREQUENCY CAN BE SCALED TO INDICATE THE PERCENT BY VOLUME OF TWO KNOWN GASES.
Inventors
- 👤 William T Rauch
- 👤 Howard W Avery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:24
CPC Classifications
F; F15; F15C; F15C1/00; F15C1/005; Y; Y10; Y10T; Y10T137/00; Y10T137/206; Y10T137/2076; Y10T137/212; Y10T137/2125; Y10T137/2147; Y10T137/2158
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |