US3018376A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas density measurement
Assignee: National Research Corp
•
Filing: 1957-11-29
•
Granted: 1962-01-23
•
Expires: 1977-11-29
Abstract
No abstract record available.
Inventors
- 👤 George F Vanderschmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:39
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/62; G01N27/64; G01N27/66; G01T; G01T1/00; G01T1/16; G01T1/185
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
APPARATUS CAPABLE OF MEASURING GAS DENSITY UNDER WIDELY VARYING CONDITIONS OF TEMPERATURE COMPRISING A RADIOACTIVE SOURCE OF IOINIZING AGEENT ACTIVITY WHOSE EMISSION OF IONIZING AGENTS IS SUBSTANTIALLY INDEPENDENT OF TEMPERATURE AND ELECTRIC FIELD, A PAIR OF ELECTRODES FOR COLLECTING IONS GENERATED BY THE IONIZING AGENTS, MEANS FOR APPLYING A CHARGE TO THE PAIR OF ELECTRODES BY IMPRESSING A PREDETERMINED INITIAL VOLTAGE ACROSS SAID PAIR OF ELECTRODES, MEANS FOR ISOLATING THE PAIR OF ELECTRODES, MEANS FOR DETERMINING THE TIME AT WHICH SAID ISOLATION OGF THE ELECTRODES IS
Claim 2
Dependent Claim
86 words
APPARATUS CAPABLE OF MEASURING GAS DENSITY UNDER WIDELY VARYING CONDITIONS OF TEMPERATURE COMPRISING A RADIOACTIVE SOURCE OF IOINIZING AGEENT ACTIVITY WHOSE EMISSION OF IONIZING AGENTS IS SUBSTANTIALLY INDEPENDENT OF TEMPERATURE AND ELECTRIC FIELD, A PAIR OF ELECTRODES FOR COLLECTING IONS GENERATED BY THE IONIZING AGENTS, MEANS FOR APPLYING A CHARGE TO THE PAIR OF ELECTRODES BY IMPRESSING A PREDETERMINED INITIAL VOLTAGE ACROSS SAID PAIR OF ELECTRODES, MEANS FOR ISOLATING THE PAIR OF ELECTRODES, MEANS FOR DETERMINING THE TIME AT WHICH SAID ISOLATION OGF THE ELECTRODES IS
References Cited (Backward Citations)
US2735944A
Cited
GB398722A
Cited
US2634609A
Cited
US2761976A
Cited
US2739283A
Cited
US2740894A
Cited
US2871365A
Cited
US2883542A
Cited
US2908819A
Cited
US2866100A
Cited
US2874305A
Cited
US2861191A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-01-22 | 1965-07-24 | 1966-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-22 | 1969-07-24 | 1970-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-22 | 1973-07-24 | 1974-01-23 | $7700.00 | Window Closed / Lapsed |