Patent US3725009A successfully refreshed from Google Patents.
US3725009A
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Detection of trace gases utilizing an electron capture detector
Assignee: Individual
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Filing: 1969-06-23
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Granted: 1973-04-03
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Expires: 1989-06-23
Abstract
Abstract METHOD AND APPARATUS FOR THE DETECTION OF TRACE GASES, SUCH AS FOR EXAMPLE ATMOSPHERIC CONTAMINANTS. A GAS SAMPLE SUSPECTED OF CONTAINING A CONTAMINANT IS INTRODUCED INTO A REACTOR CONTAINING A REAGENT WHICH CONVERTS THE CONTAMINANT INTO AN ELECTRON ABSORBER. THE PRESENCE OF THE CONTAMINANT IS DETECTED BY PASSING THE EFFLUENT FROM THE REACTOR THROUGH AN ELECTRON CAPTURE DETECTOR. IF THE GAS SAMPLE CONTAINS OXYGEN THEN IT IS DESIRABLE TO SEPARATE THE OXYGEN FROM THE STREAM ENTERING THE DETECTOR.
Inventors
- 👤 J Lovelock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:08
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/0004; G01N33/0009; G01N33/0011; G01N33/0013; G01N30/00; G01N30/02; G01N30/04; G01N30/06; G01N31/00; G01N31/16; G01N33/0014; G01N30/84; G01N2030/8423; Y; Y10; Y10T; Y10T436/00; Y10T436/18; Y10T436/182; Y10T436/184; Y10T436/186; Y10T436/25; Y10T436/25125
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 |