US2707391A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Testing viscous liquids
Assignee: AT&T Inc
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Filing: 1951-10-23
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Granted: 1955-05-03
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Expires: 1971-10-23
Abstract
No abstract record available.
Inventors
- 👤 Herbert J Mcskimin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:16
CPC Classifications
G; G01; G01N; G01N11/00; G01N11/10; G01N11/16; G01N11/162
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
A DEVICE FOR MEASURING CERTAIN PROPERTIES INCLUDING THE MECHANICAL SHEAR IMPEDANCE OF VISCOUS LIQUIDS WHICH COMPRISES IN COMBINATION A VIBRATILE UNIT COMPRISING A ROD ADAPTED FOR IMMERSION IN A TEST LIQUID, AND TRANSDUCING MEANS CONNECTED TO SAID ROD FOR DRIVING SAID ROD TO VIBRATE TORSIONALLY, A SOURCE OF CARRIERWAVES CONNECTED TO SAID TRANSDUCING MEANS, MODULATING MEANS IN CIRCUIT RELATION WITH SAID CARRIER-WAVE SOURCE AND SAID TRANSDUCING MEANS FOR MODULATING THE VIBRATIONS OF SAID SOURCE IN A SERIES OF WAVE-TRAINS WHICH ARE TRANSMITTED THE LENGTH OF SAID ROD AND REFLECTED, A BRIDGE-CIRCUIT INCLUDING SAID VIBRATILE UNIT AND MEANS FOR BALANCING OUT THE INPUT IMPEDANCE OF SAID VIBRATILE UNIT, AND INDICATING MEANS FOR RECEIVING THE WAVE-TRAINS REFLECTED BY SAID VIBRATILE UNIT AND MEASURING THE EFFECTS OF THE SAID LIQUID ON THE CHARACTERISTICS OF SAID WAVETRAINS.
Claim 2
Independent Claim
133 words
A DEVICE FOR MEASURING CERTAIN PROPERTIES INCLUDING THE MECHANICAL SHEAR IMPEDANCE OF VISCOUS LIQUIDS WHICH COMPRISES IN COMBINATION A VIBRATILE UNIT COMPRISING A ROD ADAPTED FOR IMMERSION IN A TEST LIQUID, AND TRANSDUCING MEANS CONNECTED TO SAID ROD FOR DRIVING SAID ROD TO VIBRATE TORSIONALLY, A SOURCE OF CARRIERWAVES CONNECTED TO SAID TRANSDUCING MEANS, MODULATING MEANS IN CIRCUIT RELATION WITH SAID CARRIER-WAVE SOURCE AND SAID TRANSDUCING MEANS FOR MODULATING THE VIBRATIONS OF SAID SOURCE IN A SERIES OF WAVE-TRAINS WHICH ARE TRANSMITTED THE LENGTH OF SAID ROD AND REFLECTED, A BRIDGE-CIRCUIT INCLUDING SAID VIBRATILE UNIT AND MEANS FOR BALANCING OUT THE INPUT IMPEDANCE OF SAID VIBRATILE UNIT, AND INDICATING MEANS FOR RECEIVING THE WAVE-TRAINS REFLECTED BY SAID VIBRATILE UNIT AND MEASURING THE EFFECTS OF THE SAID LIQUID ON THE CHARACTERISTICS OF SAID WAVETRAINS.
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) | 1958-05-02 | 1958-11-01 | 1959-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-02 | 1962-11-01 | 1963-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-02 | 1966-11-01 | 1967-05-03 | $7700.00 | Window Closed / Lapsed |