Patent US2641710A successfully refreshed from Google Patents.
US2641710A
Expired / Lapsed
US
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Radiological gas analysis
Assignee: Shell Development Co
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Filing: 1951-03-02
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Granted: 1953-06-09
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Expires: 1971-03-02
Abstract
No abstract record available.
Inventors
- 👤 Domenick J Pompeo
- 👤 John W Otvos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:11
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/62; G01N27/64; G01N27/66
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
A METHOD FOR ANALYZING A GASEOUS MEDIUM FOR ITS COMPOSITION, COMPRISING THE STEPS OF ESTABLISHING TWO ELECTRICAL FIELDS OS SUBSTANTIALLY EQUAL CONSTANT POTENTIAL IN TWO SEPARATE ZONES, FLOWING A GAS OF KNOWN COMPOSITION THROUGH EACH OF SAID ZONES WHILE MAINTAINING THE GAS THEREIN AT SUBSTANTIALLY EQUAL CONSTANT PRESSURES, SUBJECTING THE GAS IN SAID TWO ZONES TO BETA RADIATION OF SUBSTANTIALLY EQUAL CONSTANT INTENSITY, COMBINING THE IONIZATION CURRENTS PRODUCED IN SAID TWO ZONES BY SAID RADIATION IN OPPOSITION TO EACH OTHER IN SUCH A MANNER AS TO REDUCE THE RESULTANT CURRENT TO ZERO, DISCONTINUING THE FLOW OF THE GAS OF KNOWN COMPOSITION THROUGH ONE OF THE CHAMBERS, FLOWING A GAS OF UNKNOWN COMPOSITION THROUGH SAID CHAMBER WHILE MAINTAINING CONSTANT CONDITIONS OF PRESSURE AND RADIATION SUBSTANTIALLY AS BEFORE, COMBINING THE IONIZATION CURRENTS PRODUCED IN THE TWO CHAMBERS IN OPPOSITION TO EACH OTHER, AND DETERMINING THE COMPOSITION OF THE UNKNOWN GAS BY MEASURING THE RESULTANT CURRENT.
Claim 2
Independent Claim
153 words
A METHOD FOR ANALYZING A GASEOUS MEDIUM FOR ITS COMPOSITION, COMPRISING THE STEPS OF ESTABLISHING TWO ELECTRICAL FIELDS OS SUBSTANTIALLY EQUAL CONSTANT POTENTIAL IN TWO SEPARATE ZONES, FLOWING A GAS OF KNOWN COMPOSITION THROUGH EACH OF SAID ZONES WHILE MAINTAINING THE GAS THEREIN AT SUBSTANTIALLY EQUAL CONSTANT PRESSURES, SUBJECTING THE GAS IN SAID TWO ZONES TO BETA RADIATION OF SUBSTANTIALLY EQUAL CONSTANT INTENSITY, COMBINING THE IONIZATION CURRENTS PRODUCED IN SAID TWO ZONES BY SAID RADIATION IN OPPOSITION TO EACH OTHER IN SUCH A MANNER AS TO REDUCE THE RESULTANT CURRENT TO ZERO, DISCONTINUING THE FLOW OF THE GAS OF KNOWN COMPOSITION THROUGH ONE OF THE CHAMBERS, FLOWING A GAS OF UNKNOWN COMPOSITION THROUGH SAID CHAMBER WHILE MAINTAINING CONSTANT CONDITIONS OF PRESSURE AND RADIATION SUBSTANTIALLY AS BEFORE, COMBINING THE IONIZATION CURRENTS PRODUCED IN THE TWO CHAMBERS IN OPPOSITION TO EACH OTHER, AND DETERMINING THE COMPOSITION OF THE UNKNOWN GAS BY MEASURING THE RESULTANT CURRENT.
References Cited (Backward Citations)
US2097760A
Cited
GB567280A
Cited
US2437476A
Cited
US2506419A
Cited
US2495650A
Cited
US2521656A
Cited
US2538632A
Cited
US2547874A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-08 | 1956-12-08 | 1957-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-08 | 1960-12-08 | 1961-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-08 | 1964-12-08 | 1965-06-09 | $7700.00 | Window Closed / Lapsed |