US3154681A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for measuring local gas densities in a rarefied gaseous medium
Assignee: Individual
•
Filing: 1961-11-15
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Granted: 1964-10-27
•
Expires: 1981-11-15
Abstract
No abstract record available.
Inventors
- 👤 Charles A Ziegler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:31
CPC Classifications
G; G01; G01M; G01M9/00; G01M9/06; G01N; G01N23/00; G01N23/22; G01N23/223; G01N2223/00; G01N2223/07; G01N2223/076
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
34 words
A DEVICE FOR MEASURING GAS DENSITY IN A RAREFIED GASEOUS MEDIUM COMPRISING A SOURCE OF A WELL-DEFINED ELECTRON BEAM, MEANS FOR DIRECTING SAID BEAM INTO A RAREFIED GASEOUS MEDIUM AND MEANS FOR MEASURING THE
Claim 2
Independent Claim
34 words
A DEVICE FOR MEASURING GAS DENSITY IN A RAREFIED GASEOUS MEDIUM COMPRISING A SOURCE OF A WELL-DEFINED ELECTRON BEAM, MEANS FOR DIRECTING SAID BEAM INTO A RAREFIED GASEOUS MEDIUM AND MEANS FOR MEASURING THE
References Cited (Backward Citations)
US2316239A
Cited
US2952776A
Cited
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 |