US3174036A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Measurement of ultra high vacua by electron bombardment and vacuum ultra violet radiation measurement
Assignee: Individual
•
Filing: 1961-10-04
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Granted: 1965-03-16
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Expires: 1981-10-04
Abstract
No abstract record available.
Inventors
- 👤 Alexeff Igor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:37
CPC Classifications
G; G01; G01T; G01T1/00; G01T1/16; G01T1/18; H; H01; H01J; H01J41/00; H01J41/02; H01J41/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
THE METHOD OF MEASURING ULTRA-HIGH VACUA WHICH METHOD COMPRISES EXCITING A GAS, THE PRESSURE OF WHICH IS IN THE ULTRA-HIGH VACUUM REGION, AND COUNTING THE PHOTONS EMITTED BY THE EXCITED GAS IN THE FAR ULTRA-VIOLET BY MEANS OF A GAS-FILLED DISCHARGE TUBE HAVING AT LEAST TWO ELECTRODES ACROSS WHICH A VOLTAGE IS KEPT SO THAT AN IONIZING EVENT IN THE GAS INITIATES A STRONG ELECTRICAL DISCHARGE IN THE TUBE.
Claim 2
Independent Claim
69 words
THE METHOD OF MEASURING ULTRA-HIGH VACUA WHICH METHOD COMPRISES EXCITING A GAS, THE PRESSURE OF WHICH IS IN THE ULTRA-HIGH VACUUM REGION, AND COUNTING THE PHOTONS EMITTED BY THE EXCITED GAS IN THE FAR ULTRA-VIOLET BY MEANS OF A GAS-FILLED DISCHARGE TUBE HAVING AT LEAST TWO ELECTRODES ACROSS WHICH A VOLTAGE IS KEPT SO THAT AN IONIZING EVENT IN THE GAS INITIATES A STRONG ELECTRICAL DISCHARGE IN THE TUBE.
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) | 1968-03-15 | 1968-09-14 | 1969-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-15 | 1972-09-14 | 1973-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-15 | 1976-09-14 | 1977-03-16 | $7700.00 | Window Closed / Lapsed |