US3303128A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of fuel oils
Assignee: BP PLC
•
Filing: 1964-06-18
•
Granted: 1967-02-07
•
Expires: 1984-06-18
Abstract
No abstract record available.
Inventors
- 👤 Peel David Hallam
- 👤 O'donnell James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:58
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
159 words
A PROCESS FOR THE PRODUCTION OF A FUEL OIL HAVING A VISCOSITY WITHIN THE RANGE 40 TO 90 CS. AT 75*C. AND A POUR POINT BELOW 70*F. FROM A WAXY CRUDE, SUCH CRUDE CONTAINING WAX IN AN AMOUNT THAT, WHEN CONVENTIONALLY DISTILLED IN REFINERY DISTILLATION UNITS TO AN EQUIVALENT CUT POINT OF LESS THAN 550*C. CORRECTED TO 760 MM. HG, IT GIVES A VACUUM RESIDUE HAVING SO HIGH A WAX CONTENT THAT IT CANNOT BE BLENDED WITH GAS-OIL TO GIVE A BLEND HAVING A VISCOSITY ABOVE 40 CS. AT 75*C., 1000 REDWOOD 1 SECONDS AT 100*F., AS WELL AS A POUR POINT BELOW 70*F., COMPRISING VACUUM DISTILLING THE WAXY CRUDE TO OBTAIN A FINAL VACUUM RESIDUE BOILING ABOVE 550*C. AT A PRESSURE CORRECTED TO 760 MM. HG, AND BLENDING THIS HEAVY RESIDUE WITH GAS-OIL IN AN AMOUNT SUFFICIENT TO GIVE BOTH THE REQUIRED VISCOSITY WITHIN THE RANGE 40 TO 90 CS. AT 75*C. AND A POUR POINT BELOW 70*F.
Claim 2
Dependent Claim
159 words
A PROCESS FOR THE PRODUCTION OF A FUEL OIL HAVING A VISCOSITY WITHIN THE RANGE 40 TO 90 CS. AT 75*C. AND A POUR POINT BELOW 70*F. FROM A WAXY CRUDE, SUCH CRUDE CONTAINING WAX IN AN AMOUNT THAT, WHEN CONVENTIONALLY DISTILLED IN REFINERY DISTILLATION UNITS TO AN EQUIVALENT CUT POINT OF LESS THAN 550*C. CORRECTED TO 760 MM. HG, IT GIVES A VACUUM RESIDUE HAVING SO HIGH A WAX CONTENT THAT IT CANNOT BE BLENDED WITH GAS-OIL TO GIVE A BLEND HAVING A VISCOSITY ABOVE 40 CS. AT 75*C., 1000 REDWOOD 1 SECONDS AT 100*F., AS WELL AS A POUR POINT BELOW 70*F., COMPRISING VACUUM DISTILLING THE WAXY CRUDE TO OBTAIN A FINAL VACUUM RESIDUE BOILING ABOVE 550*C. AT A PRESSURE CORRECTED TO 760 MM. HG, AND BLENDING THIS HEAVY RESIDUE WITH GAS-OIL IN AN AMOUNT SUFFICIENT TO GIVE BOTH THE REQUIRED VISCOSITY WITHIN THE RANGE 40 TO 90 CS. AT 75*C. AND A POUR POINT BELOW 70*F.
References Cited (Backward Citations)
US2663675A
Cited
US3234118A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-06 | 1970-08-08 | 1971-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-06 | 1974-08-08 | 1975-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-06 | 1978-08-08 | 1979-02-07 | $7700.00 | Window Closed / Lapsed |