Patent US6379373B1 successfully refreshed from Google Patents.
US3279240A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elastic rheometer
Assignee: Individual
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Filing: 1963-12-12
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Granted: 1966-10-18
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Expires: 1983-12-12
Abstract
No abstract record available.
Inventors
- 👤 Ronald C Kowalski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:46
CPC Classifications
G; G01; G01N; G01N11/00; G01N11/02; G01N11/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
THE PROCESS OF PRODUCING TEST SPECIMENS OF VISCOELASTIC MOLTEN POLYMERIC MATERIALS, WHICH SPECIMENS, BY VIRTURE OF THEIR SIZE AND WEIGHT, MAY BE USED, TOGETHER WITH THE DIMENSIONS OF THE DIE AND RESERVOIR AND DENSITIES OF THE MOLTEN AND SOLID MATERIAL AND TIME INTERVAL OF THE EXPERIMENT, TO CALCULATE, FROM EACH SPECIMEN, BOTH THE APARENT MELT VISCOSITY AND THE RECOVERABLE ELASTIC STRIAN FOR ANY SUCH MATERIAL, AT THE CONDITION OF EXTRUSION, WHICH PROCESS CONSISTS IN: MELTING A CHARGE OF POLYMERIC MATERIAL IN A RESERVOIR, EXTRUDING A ROD-LIKE SPECIMEN OF THE CHARGE FROM THE RESERVOIR THROUGH A CAPILLARY ORIFICE IN A DIE, AND MAINTAINING THE TEMPERATURE OF THE EXTRUDED SPECIMEN SUFFICIENTLY HIGH TO SUSTAIN THE MATERIAL IN A FLUID STATE AND ALLOW FULL SWELLING THEREOF.
Claim 2
Dependent Claim
123 words
THE PROCESS OF PRODUCING TEST SPECIMENS OF VISCOELASTIC MOLTEN POLYMERIC MATERIALS, WHICH SPECIMENS, BY VIRTURE OF THEIR SIZE AND WEIGHT, MAY BE USED, TOGETHER WITH THE DIMENSIONS OF THE DIE AND RESERVOIR AND DENSITIES OF THE MOLTEN AND SOLID MATERIAL AND TIME INTERVAL OF THE EXPERIMENT, TO CALCULATE, FROM EACH SPECIMEN, BOTH THE APARENT MELT VISCOSITY AND THE RECOVERABLE ELASTIC STRIAN FOR ANY SUCH MATERIAL, AT THE CONDITION OF EXTRUSION, WHICH PROCESS CONSISTS IN: MELTING A CHARGE OF POLYMERIC MATERIAL IN A RESERVOIR, EXTRUDING A ROD-LIKE SPECIMEN OF THE CHARGE FROM THE RESERVOIR THROUGH A CAPILLARY ORIFICE IN A DIE, AND MAINTAINING THE TEMPERATURE OF THE EXTRUDED SPECIMEN SUFFICIENTLY HIGH TO SUSTAIN THE MATERIAL IN A FLUID STATE AND ALLOW FULL SWELLING THEREOF.
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) | 1969-10-17 | 1970-04-18 | 1970-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-17 | 1974-04-18 | 1974-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-17 | 1978-04-18 | 1978-10-18 | $7700.00 | Window Closed / Lapsed |