US2950387A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas analysis
Assignee: Bell and Howell Co
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Filing: 1957-08-16
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Granted: 1960-08-23
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Expires: 1977-08-16
Abstract
No abstract record available.
Inventors
- 👤 Wilson M Brubaker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:54
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/62; G01N27/622
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
THE METHOD FOR ANALYZING A GAS SAMPLE HAVING TWO CONSTITUENTS WHICH HAVE DIFFERENT IONIC MOBILITIES, THE METHOD COMPRISING THE STEPS OF CAUSING THE CONSTITUENTS TO BECOME IONIZED, SUBJECTING THE IONS TO AN ELECTRIC FIELD OF ONE POLARITY BETWEEN TWO ELECTRODES TO DRIVE IONS TOWARD ONE OF THE ELECTRODES, MAINTAINING SAID FIELD OF SAID ONE POLARITY UNTIL A SUBSTANTIAL NUMBER OF IONS
Claim 2
Independent Claim
61 words
THE METHOD FOR ANALYZING A GAS SAMPLE HAVING TWO CONSTITUENTS WHICH HAVE DIFFERENT IONIC MOBILITIES, THE METHOD COMPRISING THE STEPS OF CAUSING THE CONSTITUENTS TO BECOME IONIZED, SUBJECTING THE IONS TO AN ELECTRIC FIELD OF ONE POLARITY BETWEEN TWO ELECTRODES TO DRIVE IONS TOWARD ONE OF THE ELECTRODES, MAINTAINING SAID FIELD OF SAID ONE POLARITY UNTIL A SUBSTANTIAL NUMBER OF IONS
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) | 1963-08-23 | 1964-02-22 | 1964-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-23 | 1968-02-22 | 1968-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-23 | 1972-02-22 | 1972-08-23 | $7700.00 | Window Closed / Lapsed |