US3122914A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Viscometers
Assignee: —
•
Filing: —
•
Granted: 1964-03-03
•
Expires: 1981-03-03
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:17
CPC Classifications
G; G01; G01N; G01N11/00; G01N11/10; G01N11/14
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
109 words
IN A VISCOSITY METER, A FLUID HOLDING CHAMBER HAVING COAXIAL RADIALLY SPACED ROTARY CYLINDRICAL MEMBERS THEREIN FOR EXCHANGE OF TORQUE THROUGH THE MEDIUM OF THE FLUID, THE CHAMBER HAVING RESPECTIVELY CONTINUOUS OPPOSED WALLS OF NON-MAGNETIC MATERIAL TO WHICH THE AXIS OF THE MEMBERS IS SUBSTANTIALLY PERPENDICULAR, A DRIVE DEVICE MOUNTED ON ONE OF SAID WALLS AND DETACHABLE THEREFROM, A MAGNETIC COUPLING EFFECTIVE THROUGH SAID CONTINUOUS WALL FOR DRIVING ONE OF THE MEMBERS AND A SENSING DEVICE FOR MEASURING THE TORQUE TRANSMITTED TO THE OTHER MEMBER AND DISPOSED ADJACENT THE OTHER WALL, AND A SECOND MAGNETIC COUPLING CONNECTING THE SENSING DEVICE TO SAID OTHER MEMBER THROUGH THE OTHER CONTINUOUS WALL.
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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) | 1967-03-03 | 1967-09-02 | 1968-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-03 | 1971-09-02 | 1972-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-03 | 1975-09-02 | 1976-03-03 | $7700.00 | Window Closed / Lapsed |