US3242720A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for determining rheological properties
Assignee: Phillips Petroleum Co
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Filing: 1963-09-30
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Granted: 1966-03-29
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Expires: 1983-09-30
Abstract
No abstract record available.
Inventors
- 👤 Fred J Zavasnik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:57
CPC Classifications
G; G01; G01N; G01N11/00; G01N11/02; G01N11/04; G01N11/06; G01N33/00; G01N33/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
APPARATUS FOR DETERMINING A RHEOLOGICAL PROPERTY OF A VISCOUS MATERIAL COMPRISING IN COMBINATION A CHAMBER, AN OUTLET IN AN END PORTION OF SAID CHAMBER, A CLOSE FITTING RECIPROCABLE PISTON WITHIN SAID CHAMBER, AN INLET TO SAID END PORTION OF SAID CHAMBER, MEANS FOR APPLYING CONSTANT PRESSURE TO THE SURFACE OF SAID PISTON OPPOSITE SAID END PORTION, VALVE MEANS IN SAID INLET, MEANS FOR ACTUATING SAID VALVE TO THE OPEN POSITION, MEANS FOR CLOSING SAID VALVE, MEANS FOR MEASURING THE TIME INTERVAL FOR THE PISTON TO MOVE A PREDETERMINED DISTANCE WITHIN SAID CHAMBER, SAID TIME INTERVAL BEING INDICATIVE OF A RHEOLOGICAL PROPERTY OF A FLUID INTRODUCED INTO SAID CHAMBER AND EXPELLED THROUGH SAID OUTLET BY SAID PISTON.
Claim 2
Dependent Claim
116 words
APPARATUS FOR DETERMINING A RHEOLOGICAL PROPERTY OF A VISCOUS MATERIAL COMPRISING IN COMBINATION A CHAMBER, AN OUTLET IN AN END PORTION OF SAID CHAMBER, A CLOSE FITTING RECIPROCABLE PISTON WITHIN SAID CHAMBER, AN INLET TO SAID END PORTION OF SAID CHAMBER, MEANS FOR APPLYING CONSTANT PRESSURE TO THE SURFACE OF SAID PISTON OPPOSITE SAID END PORTION, VALVE MEANS IN SAID INLET, MEANS FOR ACTUATING SAID VALVE TO THE OPEN POSITION, MEANS FOR CLOSING SAID VALVE, MEANS FOR MEASURING THE TIME INTERVAL FOR THE PISTON TO MOVE A PREDETERMINED DISTANCE WITHIN SAID CHAMBER, SAID TIME INTERVAL BEING INDICATIVE OF A RHEOLOGICAL PROPERTY OF A FLUID INTRODUCED INTO SAID CHAMBER AND EXPELLED THROUGH SAID OUTLET BY SAID PISTON.
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) | 1969-03-28 | 1969-09-27 | 1970-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-28 | 1973-09-27 | 1974-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-28 | 1977-09-27 | 1978-03-29 | $7700.00 | Window Closed / Lapsed |