US2777889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crystallization of polycyclic hydrocarbons
Assignee: Individual
•
Filing: 1951-11-19
•
Granted: 1957-01-15
•
Expires: 1971-11-19
Abstract
No abstract record available.
Inventors
- 👤 Naumann Carl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:41
CPC Classifications
C; C10; C10G; C10G31/00; C10G31/10; B; B01; B01D; B01D9/00; B01D9/0004; B01D9/0013; B01D9/0059; B01D9/0063; C07; C07C; C07C7/00; C07C7/14; C07D; C07D209/00; C07D209/56; C07D209/80; C07D209/82; C07D209/84
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
202 words
THE PROCESS OF REMOVING CRYSTALLIZABLE POLYCYCLIC HYDROCARBONS FROM HYDROCARBON OIL CONTAINING SUCH COMPOUNDS, WHICH COMPRISES CONTINUOUSLY PROGRESSING HYDROCARBON OIL, INITIALLY AT A TEMPERATURE FROM 90 TO 170* F. THROUGH A PLURALITY OF GENERALLY HORIZONTAL CLOSED CHAMBERS OF A FIRST STAGE AND THERE COOLING THE OIL AND AGITATING THE OIL AND CRYSTALS WHICH FORM BY ROTORS AT A SPEED NOT IN EXCES OF 5 R. P. M. WITH CONTINOUS SCRAPING ADJACENT TO BUT OUT OF CONTACT WITH THE CHAMBER WALLS FOR A TIME IN EXCES OF 8 HOURS, CONTINUOUSLY REMOVING THE CRYSTALS THAT FORM FROM THE OIL BY CENTRIFUGING, THEN CONTINUOUSLY PROGRESSING THE OIL REMAINING AFTER THE REMOVAL OF THE CRYSTALS INITIALLY AT A TEMPERATURE OF BELOW 100* F. THROUGH A PLURALITY OF GENERALLY HORIZONTAL CLOSED CHAMBERS OF A SECOND STAGE AND THERE COOLING THE OIL AND AGITATING THE OIL AND CRYSTALS THAT FORM BY ROTORS AT A SPEED NOT EXCEEDING 5 R. P. M. WITH CONTINUOUS SCRAPING ADJACENT TO BUT OUT OF CONTACT WITH THE CHAMBER WALLS FOR A TIME IN EXCESS OF 8 HOURS, AND CONTINUOUSLY REMOVING THE SECOND STAGE CRYSTALS FROM THE OIL BY CENTRIFUGING, THE PROCESS THROUGHOUT THE FIRST AND SECOND STAGES BEING CARRIED OUT IN A CLOSED SYSTEM.
Claim 2
Dependent Claim
202 words
THE PROCESS OF REMOVING CRYSTALLIZABLE POLYCYCLIC HYDROCARBONS FROM HYDROCARBON OIL CONTAINING SUCH COMPOUNDS, WHICH COMPRISES CONTINUOUSLY PROGRESSING HYDROCARBON OIL, INITIALLY AT A TEMPERATURE FROM 90 TO 170* F. THROUGH A PLURALITY OF GENERALLY HORIZONTAL CLOSED CHAMBERS OF A FIRST STAGE AND THERE COOLING THE OIL AND AGITATING THE OIL AND CRYSTALS WHICH FORM BY ROTORS AT A SPEED NOT IN EXCES OF 5 R. P. M. WITH CONTINOUS SCRAPING ADJACENT TO BUT OUT OF CONTACT WITH THE CHAMBER WALLS FOR A TIME IN EXCES OF 8 HOURS, CONTINUOUSLY REMOVING THE CRYSTALS THAT FORM FROM THE OIL BY CENTRIFUGING, THEN CONTINUOUSLY PROGRESSING THE OIL REMAINING AFTER THE REMOVAL OF THE CRYSTALS INITIALLY AT A TEMPERATURE OF BELOW 100* F. THROUGH A PLURALITY OF GENERALLY HORIZONTAL CLOSED CHAMBERS OF A SECOND STAGE AND THERE COOLING THE OIL AND AGITATING THE OIL AND CRYSTALS THAT FORM BY ROTORS AT A SPEED NOT EXCEEDING 5 R. P. M. WITH CONTINUOUS SCRAPING ADJACENT TO BUT OUT OF CONTACT WITH THE CHAMBER WALLS FOR A TIME IN EXCESS OF 8 HOURS, AND CONTINUOUSLY REMOVING THE SECOND STAGE CRYSTALS FROM THE OIL BY CENTRIFUGING, THE PROCESS THROUGHOUT THE FIRST AND SECOND STAGES BEING CARRIED OUT IN A CLOSED SYSTEM.
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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) | 1960-01-15 | 1960-07-16 | 1961-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-15 | 1964-07-16 | 1965-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-15 | 1968-07-16 | 1969-01-15 | $7700.00 | Window Closed / Lapsed |