US3616679A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paramagnetic oxygen detector
Assignee: MSA Italiana SpA
•
Filing: 1969-11-06
•
Granted: 1971-11-02
•
Expires: 1989-11-06
Abstract
Abstract THIS INVENTION RELATES TO A PARAMAGNETIC GAS ANALYZER OF THE "MAGNETIC SUSCEPTIBILITY OF A GAS, SUCH AS OXYGEN, THAT THE MAGNETIC SUSCEPTIBILITY OF A GAS, SUCH AS OXYGEN, VARIES INVERSELY WITH ITS TEMPERATURE. A SAMPLE GAS IS HEATED IN A NON-HOMOGENEOUS MAGNETIC FIELD INSIDE A CYLINDRICAL TEST CHAMBER. THE HEATING ELEMENTS ARE RECESSED IN THE SURFACE OF THE END WALLS OF THE CHAMBER AND FUNCTION ONLY TO GENERATE THE MAGNETIC WIND, WHICH IS, IN TURN, MEASURED BY ITS THERMAL EFFECT ON SEPARATE ELECTRICAL RESISTANCE SENSORS.
Inventors
- 👤 Emilio G Meyer
- 👤 Gianmario Bardoni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:19
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/72; G01N27/74
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) | 1974-11-01 | 1975-05-03 | 1975-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-01 | 1979-05-03 | 1979-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-01 | 1983-05-03 | 1983-11-02 | $7700.00 | Window Closed / Lapsed |