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US3690835A Expired / Lapsed US ⏱️ 0.0 years remaining

Method and apparatus for analyzing gaseous chromatographic effluents

Assignee: California Institute of Technology
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Filing: 1970-02-02
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Granted: 1972-09-12
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Expires: 1990-02-02
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Abstract

Abstract A COMBINED HYDROGEN GAS SEPARATOR AND GENERATOR DEVICE COMPRISING A PAIR OF THIN PALLADIUM FILM MEMBRANE ELECTRODES SEPARATED BY AN AQUEOUS HYDROXIDE ELECTROLYTE. ON APPLICATION OF AN ELECTROLYTIC CURRENT TO THE FILMS HEATED TO A TEMPERATURE OF AT LEAST 150*C., HYDROGEN IS SELECTIVELY TRANSFERRED THROUGH THE FIRST FILM, ACROSS THE BODY OF ELECTROLYTE AS PROTONIC HYDROGEN AND IS REGENERATED AS DIATOMIC HYDROGEN ON THE OUTSIDE SURFACE OF THE SECOND FILM. THE IMPURITIES IN THE HYDROGEN INLET STREAM COLLECT AT THE OUTSIDE SURFACE OF THE FIRST FILM. THE CONCENTRATED IMPURITIES CAN BE SENT TO DETECTOR FOR ANALYSIS. THE REGENERATED HYDROGEN CAN BE RECYCLED TO OPERATE A SEPARATOR UNIT SUCH AS A GAS CHROMATOGRAPHIC COLUMN.

Inventors

  • 👤 James E Lovelock

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-01 05:22
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/84; G01N27/00; G01N27/26; G01N27/416; G01N27/42; G01N30/26; G01N30/28; G01N30/34; G01N2030/8423; Y; Y10; Y10T; Y10T436/00; Y10T436/24

Claims Analysis

Total Claims: 0
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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) 1975-09-12 1976-03-13 1976-09-12 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1979-09-12 1980-03-13 1980-09-12 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1983-09-12 1984-03-13 1984-09-12 $7700.00 Window Closed / Lapsed

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