US2539915A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of purifying heavy boiler oil
Assignee: Alfa Laval Holdings Amsterdam AB
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Filing: 1948-12-02
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Granted: 1951-01-30
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Expires: 1968-12-02
Abstract
No abstract record available.
Inventors
- 👤 Lindgren Hans Olof
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:15
CPC Classifications
C; C10; C10G; C10G33/00; C10G33/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
IN THE PURIFICATION OF HEAVY BROILER OIL CONTAINING WATER AND SOLID IMPURITIES AND INTENDED AS FUEL FOR COMBUSTION ENGINES, ESPECIALLY DIESEL ENGINES, BY SUBJECTING THE OIL TO EMULSION-BREAKING HEATING AND SUBSEQUENT SEPARATION OF OIL FROM WATER AND SOLID IMPURITIES, THE IMPROVEMENT WHICH COMPRISES FLOWING A STREAM OF THE OIL THROUGH A HEATING ZONE AND THERE HEATING IT RAPIDLY TO AN EMULSION-BREAKING TEMPERATURE OF ABOUT 80-95* C., AND CENTRIFUGING THE HEATED OIL BEFORE THERE IS ANY NOTICEABLE PRECIPITATION OF QUICK-BURNING ASPHALTIC SUBSTANCES IN THE OIL, THE TIME DURING WHICH THE OIL IS MAINTAINED AT THE HIGHEST TEMPERATURE IN THE HEATING AND SEPARATING STEPS BEING NO GREATER THAN TEN MINUTES.
Claim 2
Dependent Claim
108 words
IN THE PURIFICATION OF HEAVY BROILER OIL CONTAINING WATER AND SOLID IMPURITIES AND INTENDED AS FUEL FOR COMBUSTION ENGINES, ESPECIALLY DIESEL ENGINES, BY SUBJECTING THE OIL TO EMULSION-BREAKING HEATING AND SUBSEQUENT SEPARATION OF OIL FROM WATER AND SOLID IMPURITIES, THE IMPROVEMENT WHICH COMPRISES FLOWING A STREAM OF THE OIL THROUGH A HEATING ZONE AND THERE HEATING IT RAPIDLY TO AN EMULSION-BREAKING TEMPERATURE OF ABOUT 80-95* C., AND CENTRIFUGING THE HEATED OIL BEFORE THERE IS ANY NOTICEABLE PRECIPITATION OF QUICK-BURNING ASPHALTIC SUBSTANCES IN THE OIL, THE TIME DURING WHICH THE OIL IS MAINTAINED AT THE HIGHEST TEMPERATURE IN THE HEATING AND SEPARATING STEPS BEING NO GREATER THAN TEN MINUTES.
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) | 1954-01-29 | 1954-07-31 | 1955-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-29 | 1958-07-31 | 1959-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-29 | 1962-07-31 | 1963-01-30 | $7700.00 | Window Closed / Lapsed |