US3725005A
Expired / Lapsed
US
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Analysis of reactive materials in gas streams
Assignee: Individual
•
Filing: 1970-11-03
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Granted: 1973-04-03
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Expires: 1990-11-03
Abstract
Abstract A METHOD AND APPARATUS FOR DETERMINING THE AMOUNT OF REACTIVE CONSTITUENTS IN A GAS SAMPLE IS DISCLOSED. AIR IS MIXED WITH A SAMPLE AND PASSED THROUGH A SUITABLE OXIDATION CATALYST FOR OXIDIZING THE CONSTITUENT. THE TEMPERATURE RISE IN THE CATALYST IS PROPORTIONAL TO THE CONCENTRATION OF THE CONSTITUENT IN THE SAMPLE AND IS MEASURED IMMEDIATELY ADJACENT THE INLET TO THE BED. THE TEMPERATURE OF THE AIR AND SAMPLE IS MAINTAINED ABOVE THE DEW POINT THEREOF TO PREVENT CONDENSATION OF WATER AND ABSORPTION OF REACTABLE COMPONENTS THEREIN. PROVISIONS ARE MADE TO PREVENT SORPTION OF REACTABLE COMPONENTS IN THE INLET LINE UPSTREAM OF THE REACTIVE BED.
Inventors
- 👤 W Innes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:34
CPC Classifications
G; G01; G01N; G01N25/00; G01N25/20; G01N25/22; G01N25/28; G01N25/30; G01N25/32; Y; Y10; Y10T; Y10T436/00; Y10T436/21; Y10T436/218
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |