US3138950A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for concurrent measurement of polymer melt viscosities at high and low shear rates
Assignee: Phillips Petroleum Co
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Filing: 1961-03-20
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Granted: 1964-06-30
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Expires: 1981-03-20
Abstract
No abstract record available.
Inventors
- 👤 Richard O Welty
- 👤 Elmer C Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:46
CPC Classifications
G; G01; G01N; G01N11/00; G01N11/02; G01N11/04; G01N11/08; G01N33/00; G01N33/44; G01N33/442
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
AN APPARATUS FOR INDICATING THE FLOW CHARACTERISTICS OF A NON-NEWTONIAN FLUID, COMPRISING: FIRST AND SECOND CAPILLARIES, THE OPENING THROUGH SAID SECOND CAPILLARY BEING LARGER THAN THE OPENING THROUGH SAID FIRST CAPILLARY; MEANS FOR FORCING SAID FLUID AT A CONSTANT FLOW RATE THROUGH SAID FIRST AND SECOND CAPILLARIES, IN SERIES; MEANS FOR CONTROLLING THE TEMPERATURE OF SAID FLUID; PRESSURE SENSING MEANS FOR
Claim 2
Independent Claim
61 words
AN APPARATUS FOR INDICATING THE FLOW CHARACTERISTICS OF A NON-NEWTONIAN FLUID, COMPRISING: FIRST AND SECOND CAPILLARIES, THE OPENING THROUGH SAID SECOND CAPILLARY BEING LARGER THAN THE OPENING THROUGH SAID FIRST CAPILLARY; MEANS FOR FORCING SAID FLUID AT A CONSTANT FLOW RATE THROUGH SAID FIRST AND SECOND CAPILLARIES, IN SERIES; MEANS FOR CONTROLLING THE TEMPERATURE OF SAID FLUID; PRESSURE SENSING MEANS FOR
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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) | 1967-06-30 | 1967-12-30 | 1968-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-30 | 1971-12-30 | 1972-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-30 | 1975-12-30 | 1976-06-30 | $7700.00 | Window Closed / Lapsed |