Patent US3154680A successfully refreshed from Google Patents.
US3154680A
Expired / Lapsed
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Gas analysis by measuring negative ions resulting from captured electrons
Assignee: Airco Inc
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Filing: 1956-10-18
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Granted: 1964-10-27
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Expires: 1976-10-18
Abstract
No abstract record available.
Inventors
- 👤 William J Greene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:40
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/62; G01N27/622
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
APPARATUS FOR THE DETECTION OF GASES CAPABLE OF CAPTURING ELECTRONS TO FORM NEGATIVE IONS, SAID APPARATUS COMPRISING MEANS TO LIBERATE ELECTRONS IN A GAS-FILLED REGION, MEANS TO SWEEP ELECTRONS FROM SAID REGION IN A FIRST DIRECTION, MEANS TO SWEEP NEGATIVE IONS FROM SAID REGION IN A SECOND DIRECTION, AND MEANS TO MEASURE ONE OF THE CURRENTS OF CHARGED PARTICLES SO SWEPT FROM SAID REGION.
Claim 2
Dependent Claim
64 words
APPARATUS FOR THE DETECTION OF GASES CAPABLE OF CAPTURING ELECTRONS TO FORM NEGATIVE IONS, SAID APPARATUS COMPRISING MEANS TO LIBERATE ELECTRONS IN A GAS-FILLED REGION, MEANS TO SWEEP ELECTRONS FROM SAID REGION IN A FIRST DIRECTION, MEANS TO SWEEP NEGATIVE IONS FROM SAID REGION IN A SECOND DIRECTION, AND MEANS TO MEASURE ONE OF THE CURRENTS OF CHARGED PARTICLES SO SWEPT FROM SAID REGION.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-10-27 | 1968-04-27 | 1968-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-27 | 1972-04-27 | 1972-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-27 | 1976-04-27 | 1976-10-27 | $7700.00 | Window Closed / Lapsed |