Patent US2728219A successfully refreshed from Google Patents.
US2728219A
Expired / Lapsed
US
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Means for measuring the density of a fluid
Assignee: National Research Development Corp UK
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Filing: 1954-08-25
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Granted: 1955-12-27
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Expires: 1974-08-25
Abstract
No abstract record available.
Inventors
- 👤 Martin Archer John Porter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:35
CPC Classifications
G; G01; G01N; G01N9/00; G01N9/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
172 words
APPARATUS FOR MEASURING THE DENSITY OF A FLUID, COMPRISING SEVEN COMMUNICATING PASSAGES OR LIMBS FOR FLUID FOUR LIMBS BEING CONNECTED AS THE BALANCING LIMBS OF THE BRIDGE, AN ADJUSTABLE FLOW-RESISTANCE IN AT LEAST ONE OF THE BALANCING LIMBS, AN INLET FOR FLUID TO BE MEASURED AT THE JUNCTION OF THE FIRST AND SECOND LIMBS, AN OUTLET AT THE OPPOSITE JUNCTION, THE JUNCTION OF THE FIRST AND THIRD LIMBS BEING VERTICALLY DISPLACED FROM ITS OPPOSITE JUNCTION, A FIFTH LIMB CONNECTING THE VERTICALL DISPLACED JUNCTIONS, A PRESSURE GAUGE IN THE FIFTH LIMB, A SIXTH LIMB CONNECTED AT ONE END TO AN INLET FOR REFERENCE GAS AND AT ITS OTHER END TO THE FIFTH LIMB BETWEEN THE PRESSURE GAUGE AND ONE OF THE VERTICALLY DISPLACED JUNCTIONS, A SEVENTH LIMB CONNECTED AT ONE END TO THE SAID INLET FOR REFERENCE GAS AND AT ITS OTHER END TO THE FIFTH LIMB BETWEEN THE PRESSURE GAUGE AND THE OTHER OF THE VERTICALLY DISPLACED JUNCTIONS, AND AN ADJUSTABLE FLOW-RESISTANCE IN AT LEAST ONE OF THE SIXTH AND SEVENTH LIMBS.
Claim 2
Dependent Claim
172 words
APPARATUS FOR MEASURING THE DENSITY OF A FLUID, COMPRISING SEVEN COMMUNICATING PASSAGES OR LIMBS FOR FLUID FOUR LIMBS BEING CONNECTED AS THE BALANCING LIMBS OF THE BRIDGE, AN ADJUSTABLE FLOW-RESISTANCE IN AT LEAST ONE OF THE BALANCING LIMBS, AN INLET FOR FLUID TO BE MEASURED AT THE JUNCTION OF THE FIRST AND SECOND LIMBS, AN OUTLET AT THE OPPOSITE JUNCTION, THE JUNCTION OF THE FIRST AND THIRD LIMBS BEING VERTICALLY DISPLACED FROM ITS OPPOSITE JUNCTION, A FIFTH LIMB CONNECTING THE VERTICALL DISPLACED JUNCTIONS, A PRESSURE GAUGE IN THE FIFTH LIMB, A SIXTH LIMB CONNECTED AT ONE END TO AN INLET FOR REFERENCE GAS AND AT ITS OTHER END TO THE FIFTH LIMB BETWEEN THE PRESSURE GAUGE AND ONE OF THE VERTICALLY DISPLACED JUNCTIONS, A SEVENTH LIMB CONNECTED AT ONE END TO THE SAID INLET FOR REFERENCE GAS AND AT ITS OTHER END TO THE FIFTH LIMB BETWEEN THE PRESSURE GAUGE AND THE OTHER OF THE VERTICALLY DISPLACED JUNCTIONS, AND AN ADJUSTABLE FLOW-RESISTANCE IN AT LEAST ONE OF THE SIXTH AND SEVENTH LIMBS.
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) | 1958-12-26 | 1959-06-27 | 1959-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-26 | 1963-06-27 | 1963-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-26 | 1967-06-27 | 1967-12-27 | $7700.00 | Window Closed / Lapsed |