Patent FR1042871A successfully refreshed from Google Patents.
Patent US3171028A successfully refreshed from Google Patents.
US3171028A
Expired / Lapsed
US
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Ultraviolet gas analysis using a flowthrough type ionization chamber
Assignee: National Research Development Corp UK
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Filing: 1961-09-11
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Granted: 1965-02-23
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Expires: 1981-09-11
Abstract
No abstract record available.
Inventors
- 👤 Lovelock James Ephraim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:35
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/62; G01N27/64; G01N27/66; G01N30/00; G01N30/02; G01N30/62; G01N30/64; G01N30/70; H; H01; H01J; H01J41/00; H01J41/02; H01J41/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
147 words
A DEVICE FOR USE AS AN IONISATION DECTECTOR, COMPRISING A CHAMBER CONTAINING TWO SETS OD ELECTRODES, ONE OF WHICH SET IS CONNECTED TO EFFECT AN ELECTRICAL DISCHARGE, ONE OF THE ELECTRODES OF THE SET BEING HOLLOW SO AS TO PERMIT THE INTRODUCTION INTO THE CHAMBER OF A DISCHARGESUSTAINING GAS, THE ELECTRICAL DISCHARGE IN THE DISCHARGE SUSTAINING GAS PRODUCING AN ULTRA-VIOLET RADIATION ELECTRODE THE SECOND SET OF ELECTRODES SERVING AS DETECTOR ELECTRODES FOR IONISATION CURRENT PRODUCED BY THE ULTRAVIOLET RADIATION, ONE ELECTRODE OF THE SECOND SET BEING HOLLOW SO AS TO PERMIT THE INTRODUCTION INTO THE CHAMBER OF A GAS MIXTURE, SAID ONE ELECTRODE BEING ENCIRCLED BY THE OTHER ELECTRODE OF THE SET TO THEREBY DEFINE THE REGION WITHIN WHICH IONISATION OF THE GAS MIXTURE OCCURS, THE TWO SETS OF ELECTRODES BEING DISPOSED SO THAT THE ULTRAVIOLET RADIATION FROM THE DISCHARGE IS DIRECTED TOWARDS THE SAID IONISATION REGION.
Claim 2
Independent Claim
147 words
A DEVICE FOR USE AS AN IONISATION DECTECTOR, COMPRISING A CHAMBER CONTAINING TWO SETS OD ELECTRODES, ONE OF WHICH SET IS CONNECTED TO EFFECT AN ELECTRICAL DISCHARGE, ONE OF THE ELECTRODES OF THE SET BEING HOLLOW SO AS TO PERMIT THE INTRODUCTION INTO THE CHAMBER OF A DISCHARGESUSTAINING GAS, THE ELECTRICAL DISCHARGE IN THE DISCHARGE SUSTAINING GAS PRODUCING AN ULTRA-VIOLET RADIATION ELECTRODE THE SECOND SET OF ELECTRODES SERVING AS DETECTOR ELECTRODES FOR IONISATION CURRENT PRODUCED BY THE ULTRAVIOLET RADIATION, ONE ELECTRODE OF THE SECOND SET BEING HOLLOW SO AS TO PERMIT THE INTRODUCTION INTO THE CHAMBER OF A GAS MIXTURE, SAID ONE ELECTRODE BEING ENCIRCLED BY THE OTHER ELECTRODE OF THE SET TO THEREBY DEFINE THE REGION WITHIN WHICH IONISATION OF THE GAS MIXTURE OCCURS, THE TWO SETS OF ELECTRODES BEING DISPOSED SO THAT THE ULTRAVIOLET RADIATION FROM THE DISCHARGE IS DIRECTED TOWARDS THE SAID IONISATION REGION.
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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) | 1968-02-23 | 1968-08-24 | 1969-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-23 | 1972-08-24 | 1973-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-23 | 1976-08-24 | 1977-02-23 | $7700.00 | Window Closed / Lapsed |