US3421077A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Density measurement device for cryogenic fluids and other non-polar fluids
Assignee: QUANTUM DYNAMICS Inc ELASTRONI
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Filing: 1963-09-24
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Granted: 1969-01-07
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Expires: 1983-09-24
Abstract
No abstract record available.
Inventors
- 👤 Frederick F Liu
- 👤 Ted W Berwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:26
CPC Classifications
F; F17; F17C; F17C13/00; F17C13/02; G; G01; G01N; G01N27/00; G01N27/02; G01N27/22; G01N27/223; G01N9/00; F17C2221/00; F17C2221/01; F17C2221/012; F17C2223/00; F17C2223/01; F17C2223/0146; F17C2223/0153; F17C2223/0161; F17C2223/03; F17C2223/033; F17C2250/00; F17C2250/04; F17C2250/0404; F17C2250/0443; F17C2250/0486; F17C2250/0495; F17C2260/00; F17C2260/02; F17C2260/026; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
A DEVICE FOR MEASURING THE DENSITY OF A FLUID COMPRISING: AN OSCILLATOR; A CAPACITIVE NETWORK CONNECTED WITH SAID OSCILLATOR AND COMPRISING A FIRST MEASURING CAPACITOR LOCATED IN SAID FLUID TO FORM A PORTION OF THE NETWORK AFFECTED BY THE DIELECTRIC CONSTANT OF THE FLUID AND A SECOND ADJUSTABLE CAPACITOR CONNECTED IN PARALLEL WITH SAID FIRST CAPACITOR; MEANS FOR CONVERTING THE PEAK-TO-PEAK AMPLITUDE OF THE VOLTAGE ACROSS SAID FIRST CAPACITOR TO A CORRESPONDING D-C VOLTAGE LEVEL; COMPUTER MEANS RECEIVING SAID D-C VOLTAGE AND ELECTRICALLY SOLVING THE CLAUSIUS-MOSSOTTI EQUATION TO OBTAIN A VOLTAGE PROPORTIONAL TO THE DENSITY OF SAID FLUID; SAID CLAUSIUS-MOSSOTTI EQUATION BEING
Claim 2
Independent Claim
102 words
A DEVICE FOR MEASURING THE DENSITY OF A FLUID COMPRISING: AN OSCILLATOR; A CAPACITIVE NETWORK CONNECTED WITH SAID OSCILLATOR AND COMPRISING A FIRST MEASURING CAPACITOR LOCATED IN SAID FLUID TO FORM A PORTION OF THE NETWORK AFFECTED BY THE DIELECTRIC CONSTANT OF THE FLUID AND A SECOND ADJUSTABLE CAPACITOR CONNECTED IN PARALLEL WITH SAID FIRST CAPACITOR; MEANS FOR CONVERTING THE PEAK-TO-PEAK AMPLITUDE OF THE VOLTAGE ACROSS SAID FIRST CAPACITOR TO A CORRESPONDING D-C VOLTAGE LEVEL; COMPUTER MEANS RECEIVING SAID D-C VOLTAGE AND ELECTRICALLY SOLVING THE CLAUSIUS-MOSSOTTI EQUATION TO OBTAIN A VOLTAGE PROPORTIONAL TO THE DENSITY OF SAID FLUID; SAID CLAUSIUS-MOSSOTTI EQUATION BEING
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US2935681A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-07 | 1972-07-08 | 1973-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-07 | 1976-07-08 | 1977-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-07 | 1980-07-08 | 1981-01-07 | $7700.00 | Window Closed / Lapsed |