US3566673A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for measurement of concentration of a gas in a gas mixture
Assignee: Individual
•
Filing: 1968-02-28
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Granted: 1971-03-02
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Expires: 1988-02-28
Abstract
Abstract A METHOD AND APPARATUS FOR DETERMINING THE CONCENTRATION OF A GAS COMPONENT IN A GAS MIXTURE WHICH INCLUDES DISCHARGING THE GAS MIXTURE FROM A FIRST CHAMBER THROUGH A RESTRICTED PASSAGE UNDER CHOKED FLOW CONDITIONS, SEPARATING THE GAS WHICH IS TO BE MEASURED AS TO ITS CONCENTRATION IN THE MIXTURE, INTRODUCING THE SEPARATED GAS INTO A SECOND CHAMBER AND DISCHARGING IT FROM THE SECOND CHAMBER THROUGH A RESTRICTED PASSAGE UNDER CHOKED FLOW CONDITIONS, AND MEASURING THE RATION OF THE PRESSURE OF THE SECOND CHAMBER TO THE PRESSURE OF THE FIRST CHAMBER.
Inventors
- 👤 Abraham Kogan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:20
CPC Classifications
G; G01; G01N; G01N25/00; G01N25/14; G01N7/00; G01N7/02
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) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |