Patent US2770577A successfully refreshed from Google Patents.
US2770577A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of separating microcrystalline waxes from crude oil
Assignee: Individual
•
Filing: 1952-07-11
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Granted: 1956-11-13
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Expires: 1972-07-11
Abstract
No abstract record available.
Inventors
- 👤 Stossel Ernest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:32
CPC Classifications
C; C10; C10G; C10G73/00; C10G73/02; C10G73/06; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2544; Y10T137/2546
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
152 words
A PROCESS OF SEPARATING HIGH MELTING POINT WAXES FROM CRUDE OIL CONTAINING THE SAME AND ALSO CONTAINING RESINOUS AND ASPHALTIC INGREDIENTS, COMPRISING THE STEPS OF HEATING SAID CRUDE OIL AT A PREDETERMINED TEMPERATURE ABOVE THE SOLVATION TEMPERATURE OF SAID WAXES IN SAID OIL WHICH REDUCES TO AN OPTIMUM DEGREE THE POUR POINT AND VISCOSITY OF SAID CRUDE OIL SO AS TO STABILIZE THE COLLOIDAL SYSTEMS IN SAID CRUDE OIL BY TEMPORAILY REDUCING THE POUR POING AND VISCOSITY TO AN OPTIMUM DEGREE AND CONVERTING SAID CRUDE OIL TO A HOMOGENEOUS OILIN-WATER EMULSION, THEREBY FORMING A HOMOGENOUS STABILIZED OIL-IN-WATER EMULSION; COOLING SAID HOMOGENEOUS STABILZIED OIL-IN-WATER EMULSION IN AN OSCILLATING VACUUM DURING THE OPTIMUM POUR POINT AND VISCOSITY HYSTERESIS PERIOD UNTIL PRECIPITATION OF SAID HIGH MELTING POINT WAXES FROM SAID EMULSION SO AS TO COOL SAID EMULSION AND DISINTEGRATE THE SAME WHILE FURTHER REDUCING THE POUR POINT OF SAID CRUDE OIL BY SHAKING ACTION OF
Claim 2
Dependent Claim
152 words
A PROCESS OF SEPARATING HIGH MELTING POINT WAXES FROM CRUDE OIL CONTAINING THE SAME AND ALSO CONTAINING RESINOUS AND ASPHALTIC INGREDIENTS, COMPRISING THE STEPS OF HEATING SAID CRUDE OIL AT A PREDETERMINED TEMPERATURE ABOVE THE SOLVATION TEMPERATURE OF SAID WAXES IN SAID OIL WHICH REDUCES TO AN OPTIMUM DEGREE THE POUR POINT AND VISCOSITY OF SAID CRUDE OIL SO AS TO STABILIZE THE COLLOIDAL SYSTEMS IN SAID CRUDE OIL BY TEMPORAILY REDUCING THE POUR POING AND VISCOSITY TO AN OPTIMUM DEGREE AND CONVERTING SAID CRUDE OIL TO A HOMOGENEOUS OILIN-WATER EMULSION, THEREBY FORMING A HOMOGENOUS STABILIZED OIL-IN-WATER EMULSION; COOLING SAID HOMOGENEOUS STABILZIED OIL-IN-WATER EMULSION IN AN OSCILLATING VACUUM DURING THE OPTIMUM POUR POINT AND VISCOSITY HYSTERESIS PERIOD UNTIL PRECIPITATION OF SAID HIGH MELTING POINT WAXES FROM SAID EMULSION SO AS TO COOL SAID EMULSION AND DISINTEGRATE THE SAME WHILE FURTHER REDUCING THE POUR POINT OF SAID CRUDE OIL BY SHAKING ACTION OF
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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) | 1959-11-13 | 1960-05-14 | 1960-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-13 | 1964-05-14 | 1964-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-13 | 1968-05-14 | 1968-11-13 | $7700.00 | Window Closed / Lapsed |