Patent US3304765A successfully refreshed from Google Patents.
US3304765A
Expired / Lapsed
US
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System of viscosity detection
Assignee: Individual
•
Filing: 1964-02-14
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Granted: 1967-02-21
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Expires: 1984-02-14
Abstract
No abstract record available.
Inventors
- 👤 Austin S Norcross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:31
CPC Classifications
G; G01; G01N; G01N11/00; G01N11/10; G01N11/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
97 words
METHOD OF MEASURING THE VISCOSITY OF FLUIDS COMPRISING THE STEPS OF: PASSING FLUID AT ALTERNATELY DIFFERENT SPEEDS OTHER THAN ZERO THROUGH A CHANNEL CONTAINING A BODY WITH PREDETERMINED CLEARANCE AND BIASED AGAINST THE FLUID FLOW, MOVING THE BODY WITH THE FLUID AGAINST THE BIAS DURING ONE PERIOD OF THE HIGHER SPEED AND THEN FORCING THE LIQUID THROUGH THE CLEARANCE BY THE BIAS DURING ANOTHER PERIOD OF A SPEED SUFFICIENTLY LOW TO PERMIT MOVEMENT OF THE BODY AGAINST THE FLOW, AND MEASURING THE TIME REQUIRED BY THE BODY TO MOVE THROUGH A GIVEN DISTANCE DURING SAID OTHER PERIOD.
Claim 2
Dependent Claim
97 words
METHOD OF MEASURING THE VISCOSITY OF FLUIDS COMPRISING THE STEPS OF: PASSING FLUID AT ALTERNATELY DIFFERENT SPEEDS OTHER THAN ZERO THROUGH A CHANNEL CONTAINING A BODY WITH PREDETERMINED CLEARANCE AND BIASED AGAINST THE FLUID FLOW, MOVING THE BODY WITH THE FLUID AGAINST THE BIAS DURING ONE PERIOD OF THE HIGHER SPEED AND THEN FORCING THE LIQUID THROUGH THE CLEARANCE BY THE BIAS DURING ANOTHER PERIOD OF A SPEED SUFFICIENTLY LOW TO PERMIT MOVEMENT OF THE BODY AGAINST THE FLOW, AND MEASURING THE TIME REQUIRED BY THE BODY TO MOVE THROUGH A GIVEN DISTANCE DURING SAID OTHER PERIOD.
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) | 1970-02-20 | 1970-08-22 | 1971-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-20 | 1974-08-22 | 1975-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-20 | 1978-08-22 | 1979-02-21 | $7700.00 | Window Closed / Lapsed |