Patent US3117440A successfully refreshed from Google Patents.
US3117440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Densitometer
Assignee: Lockheed Martin Corp
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Filing: 1960-09-12
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Granted: 1964-01-14
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Expires: 1980-09-12
Abstract
No abstract record available.
Inventors
- 👤 Leslie B Wilner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:28
CPC Classifications
G; G01; G01N; G01N9/00; G01N9/002
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
152 words
A DENSITOMETER COMPRISING THE COMBINATION OF A SUBSTANTIALLY RIGID FRAME ADAPTED TO BE IMMERSED IN A FLUID WHOSE DENSITY IS TO BE MEASURED, SAID FRAME HAVING AT LEAST ONE CAVITY THEREIN AND AN OPENING TO PERMIT THE FLUID WHOSE DENSITY IS TO BE MEASURED TO FLOW INTO SAID CAVITY, A SPRING SYSTEM MOUNTED TO SAID FRAME AND HAVING A PISTON DISPOSED IN SAID CAVITY, SAID PISTON HAVING A CROSSSECTION SUBSTANTIALLY SIMILAR TO THE CROSS-SECTION OF SAID CAVITY AND A SIZE SLIGHTLY SMALLER THAN SAID CAVITY, AND MEANS INCLUDING A PIEZOELECTRIC TRANSDUCER MOUNTED TO SAID FRAME AND COUPLED TO SAID SPRING SYSTEM FOR OSCILLATING SAID SYSTEM AT ITS RESONANT FREQUENCY WHICH IS A MEASURE OF THE DENSITY OF SAID FLUID, SAID LAST MENTIONED MEANS ALSO INCLUDING A SECOND PIEZOELECTRIC TRANSDUCER MOUNTED TO SAID FRAME AND COUPLED TO SAID SPRING SYSTEM FOR PROVIDING AN ELECTRICAL SIGNAL IN ACCORDANCE WITH THE OSCILLATION OF SAID SYSTEM.
Claim 2
Dependent Claim
152 words
A DENSITOMETER COMPRISING THE COMBINATION OF A SUBSTANTIALLY RIGID FRAME ADAPTED TO BE IMMERSED IN A FLUID WHOSE DENSITY IS TO BE MEASURED, SAID FRAME HAVING AT LEAST ONE CAVITY THEREIN AND AN OPENING TO PERMIT THE FLUID WHOSE DENSITY IS TO BE MEASURED TO FLOW INTO SAID CAVITY, A SPRING SYSTEM MOUNTED TO SAID FRAME AND HAVING A PISTON DISPOSED IN SAID CAVITY, SAID PISTON HAVING A CROSSSECTION SUBSTANTIALLY SIMILAR TO THE CROSS-SECTION OF SAID CAVITY AND A SIZE SLIGHTLY SMALLER THAN SAID CAVITY, AND MEANS INCLUDING A PIEZOELECTRIC TRANSDUCER MOUNTED TO SAID FRAME AND COUPLED TO SAID SPRING SYSTEM FOR OSCILLATING SAID SYSTEM AT ITS RESONANT FREQUENCY WHICH IS A MEASURE OF THE DENSITY OF SAID FLUID, SAID LAST MENTIONED MEANS ALSO INCLUDING A SECOND PIEZOELECTRIC TRANSDUCER MOUNTED TO SAID FRAME AND COUPLED TO SAID SPRING SYSTEM FOR PROVIDING AN ELECTRICAL SIGNAL IN ACCORDANCE WITH THE OSCILLATION OF SAID SYSTEM.
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) | 1967-01-13 | 1967-07-15 | 1968-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-01-13 | 1971-07-15 | 1972-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-01-13 | 1975-07-15 | 1976-01-14 | $7700.00 | Window Closed / Lapsed |