US3346483A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refining used lubricating oils with sulfuric acid and hydrogenation
Assignee: Magynyomasu Kiserleti Intezet
•
Filing: 1965-11-30
•
Granted: 1967-10-10
•
Expires: 1985-11-30
Abstract
No abstract record available.
Inventors
- 👤 Somogyi Laszlo
- 👤 Steingaszner Pal
- 👤 Hlinyanszky Istvan
- 👤 Horvath Jozsef
- 👤 Karolyi Jozsef
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:38
CPC Classifications
C; C10; C10M; C10M175/00; C10M175/0025; C10M175/0041; C10M175/0016; C10G; C10G2400/00; C10G2400/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
A PROCESS FOR RE-REFINING USED ENGINE LUBRICATING OILS AND USED INDUSTRIAL LUBRICATING OILS CONTAINING SUCH ENGINE LUBRICATING OILS, SAID PROCESS COMPRISING THE STEP OF PREPURIFYING THE USED LUBRICATING OIL BY TREATMENT WITH SULPHURIC ACID; THEN SUBJECTING THE OIL TO CATALYTIC HYDROGENATION AT A PRESSURE BETWEEN 20 AND 40 ATMOSPHERES, AT A TEMPERATURE BETWEEN 280 AND 380*C., AT A SPACE VELOCITY OF 0.5 TO 2.0 LITERS PER LITER-HOUR AND AT A GAS-TO-LIQUID RATIO OF 10 TO 120 NM.3/M.3 IN THE PRESENCE OF A PREACTIVATED, SULPHIDED HYDRO-REFINING CATALYST.
Claim 2
Dependent Claim
86 words
A PROCESS FOR RE-REFINING USED ENGINE LUBRICATING OILS AND USED INDUSTRIAL LUBRICATING OILS CONTAINING SUCH ENGINE LUBRICATING OILS, SAID PROCESS COMPRISING THE STEP OF PREPURIFYING THE USED LUBRICATING OIL BY TREATMENT WITH SULPHURIC ACID; THEN SUBJECTING THE OIL TO CATALYTIC HYDROGENATION AT A PRESSURE BETWEEN 20 AND 40 ATMOSPHERES, AT A TEMPERATURE BETWEEN 280 AND 380*C., AT A SPACE VELOCITY OF 0.5 TO 2.0 LITERS PER LITER-HOUR AND AT A GAS-TO-LIQUID RATIO OF 10 TO 120 NM.3/M.3 IN THE PRESENCE OF A PREACTIVATED, SULPHIDED HYDRO-REFINING CATALYST.
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) | 1970-10-09 | 1971-04-10 | 1971-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-09 | 1975-04-10 | 1975-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-09 | 1979-04-10 | 1979-10-10 | $7700.00 | Window Closed / Lapsed |