Patent US3237451A successfully refreshed from Google Patents.
US3237451A
Expired / Lapsed
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Volumetric measurement system
Assignee: ACOUSTICA ASSOCIATES Inc
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Filing: 1962-10-16
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Granted: 1966-03-01
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Expires: 1982-10-16
Abstract
No abstract record available.
Inventors
- 👤 Andrew V Haeff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:55
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/22; G01F23/28; G01F23/296
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
A SYSTEM FOR MEASURING THE VOLUME OF A NON-COMPRESSIBLE MATERIAL WITHIN A CONFINED SPACE COMPRISING A REFERENCE CAVITY, AN ACOUSTIC FILTER CONNECTING SAID SPACE AND SAID CAVITY FOR EQUALIZING THE STATIC PRESSURES WITHIN SAID SPACE AND SAID CAVITY WHILE MAINTAINING ACOUSTIC SEPARATION THEREOF, A DRIVE TRANSDUCER HAVING A MOVABLE ELEMENT BETWEEN THE CAVITY AND THE SPACE, MEANS FOR ACTUATING THE DRIVE TRANSDUCER TO DISPLACE THE MOVABLE ELEMENT TO PRODUCE INCREMENTAL CHANGES IN DYNAMIC GAS PRESSURE BOTH WITHIN THE SPACE AND WITHIN THE GAS CAVITY, A PAIR OF PICKUP TRANSDUCERS FOR MEASURING BOTH INCREMENTAL PRESSURE CHANGES, AND MEANS FOR COMPARING THE INCREMENTAL PRESSURE CHANGES TO PROVIDE AN OUTPUT INDICATION OF THE VOLUME OF THE NON-COMPRESSIBLE MATERIAL IN THE SPACE.
Claim 2
Independent Claim
118 words
A SYSTEM FOR MEASURING THE VOLUME OF A NON-COMPRESSIBLE MATERIAL WITHIN A CONFINED SPACE COMPRISING A REFERENCE CAVITY, AN ACOUSTIC FILTER CONNECTING SAID SPACE AND SAID CAVITY FOR EQUALIZING THE STATIC PRESSURES WITHIN SAID SPACE AND SAID CAVITY WHILE MAINTAINING ACOUSTIC SEPARATION THEREOF, A DRIVE TRANSDUCER HAVING A MOVABLE ELEMENT BETWEEN THE CAVITY AND THE SPACE, MEANS FOR ACTUATING THE DRIVE TRANSDUCER TO DISPLACE THE MOVABLE ELEMENT TO PRODUCE INCREMENTAL CHANGES IN DYNAMIC GAS PRESSURE BOTH WITHIN THE SPACE AND WITHIN THE GAS CAVITY, A PAIR OF PICKUP TRANSDUCERS FOR MEASURING BOTH INCREMENTAL PRESSURE CHANGES, AND MEANS FOR COMPARING THE INCREMENTAL PRESSURE CHANGES TO PROVIDE AN OUTPUT INDICATION OF THE VOLUME OF THE NON-COMPRESSIBLE MATERIAL IN THE SPACE.
References Cited (Backward Citations)
US1604693A
Cited
US1590369A
Cited
FR525948A
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US2161510A
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US2285151A
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US2666326A
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US2691304A
Cited
US2903673A
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US2849881A
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US2993559A
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US3075382A
Cited
US3080939A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-28 | 1969-08-30 | 1970-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-28 | 1973-08-30 | 1974-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-28 | 1977-08-30 | 1978-03-01 | $7700.00 | Window Closed / Lapsed |