Drag reducing formulations
Abstract
Abstract THIS INVENTION RELATESTO IMPROVED HYDRODYNAMIC DRAG REDUCING FORMULATIONS WHICH COMPRISE (A) PARTICULATE ETHYLENE OXIDE POLYMER, (B) AN INERT, NORMALLY-LIQUID, WATER-MISCIBE ORGANIC VEHICLE WHICH IS A NON-SOLVENT FOR SAIDETHYLENE OXIDE POLYMER SUCH AS PROPYLENE GLYCOL, (C) A SUSPENDING AGENT WHICH IS NON-REACTVE WITH SAID ETHYLENE OXIDE POLYMER AND SAID ORGANIC VEHICLE SUCH AS COLLOIDAL SILICA, AND (D) A SURFACE ACTIVE AGENT. THE USE OF THE SURFACE ACTIVE AGENT RESULTS IN SYSTEMS WHICH ARE CHARACTERIZED BY THEIR IMPROVED HANDLING CHARACTERISTICS SUCH AS FLUIDITY, PUMPABILITY, AND/OR POURABILITY. THOUGH THE VISCOSITY OFTHE SYSTEM IS SGNIFICANTLY DECREASED, THE HYDRODYNAMIC DRAG DEDUCTION EFFICIEOCY CHARACTERISTIC REMAINS PRACTICALLY UNAFFECTED. MOREOVER, AT SUCH DECREASED VISCOSITY LEVELS ONE CAN NOW INCREASE, TO A SIGNIFICANT EXTENT, THE CONCENTRATION OF ETHYLENE OXIDE POLYMER IN THE SYSTEM AND STILL MAINTAIN A VISCOSITY LEVEL WHICH IS NO GREATER THAN COMPARABLE SYSTEMS FORMULATED WITHOUT A SURFACE ACTIVE AGENT.
Inventors
- 👤 J Stratta
- 👤 C Frank
- 👤 J Barrere
Bibliographic Details
Claims Analysis
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1976-05-28 | 1976-11-27 | 1977-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-28 | 1980-11-27 | 1981-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-28 | 1984-11-27 | 1985-05-29 | $7700.00 | Window Closed / Lapsed |