US2560547A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of processing lubricating
Assignee: —
•
Filing: —
•
Granted: 1951-07-17
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Expires: 1968-07-17
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:37
CPC Classifications
C; C10; C10M; C10M159/00; C10M159/12; C10M159/123; C10G; C10G29/00; C10G29/06; C10G29/10; C10G2300/00; C10G2300/10; C10G2300/1037; C10G2300/1062; C10G2400/00; C10G2400/10; C10M2207/00; C10M2207/02; C10M2207/021; C10M2207/04; C10M2223/00; C10M2223/10; C10M2223/12; C10M2225/00; C10M2225/04; C10M2227/00; C10M2227/02; C10M2229/00; C10M2229/04; C10M2229/041; C10N; C10N2010/00; C10N2010/04; C10N2010/06; C10N2010/08; C10N2010/10; C10N2010/12; C10N2050/00; C10N2050/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A METHOD OF PROCESSING LUBRICATING OIL STOCK CONSISTING ESSENTIALLY OF HYDROCARBON MATERIAL TO YIELD AN OIL HAVING IMPROVED INHIBITION TO OXIDATION IN SERVICE, WHICH METHOD COMPRISES TRATING SAID STOCK WITH SULFURIC ACID IN A CONVENTIONAL MANNER, THEN TREATING THE RESULTING ACID-REFINED HYDROCARBON WITH AN AMOUNT OF A PHOSPHORUS SULFIDE IN THE RANGE OF ABOUT 0.1 TO ABOUT 0.75% BY WEIGHT AT A TEMPERATURE IN THE RANGE OF ABOUT 275* TO 450* F., THEN WITH AN AMOUNT OF A BASE IN THE RANGE OF ABOUT 0.25 TO 6.0 EQUIVALENTS PER MOL OF THE SULFIDE, AND INCLUDING AT LEAST ONE SEPARATE CLAY-TREATING STEP SUBSEQUENT TO THE ACID-REFINING STEP.
Claim 2
Independent Claim
106 words
A METHOD OF PROCESSING LUBRICATING OIL STOCK CONSISTING ESSENTIALLY OF HYDROCARBON MATERIAL TO YIELD AN OIL HAVING IMPROVED INHIBITION TO OXIDATION IN SERVICE, WHICH METHOD COMPRISES TRATING SAID STOCK WITH SULFURIC ACID IN A CONVENTIONAL MANNER, THEN TREATING THE RESULTING ACID-REFINED HYDROCARBON WITH AN AMOUNT OF A PHOSPHORUS SULFIDE IN THE RANGE OF ABOUT 0.1 TO ABOUT 0.75% BY WEIGHT AT A TEMPERATURE IN THE RANGE OF ABOUT 275* TO 450* F., THEN WITH AN AMOUNT OF A BASE IN THE RANGE OF ABOUT 0.25 TO 6.0 EQUIVALENTS PER MOL OF THE SULFIDE, AND INCLUDING AT LEAST ONE SEPARATE CLAY-TREATING STEP SUBSEQUENT TO THE ACID-REFINING STEP.
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) | 1954-07-16 | 1955-01-15 | 1955-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-16 | 1959-01-15 | 1959-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-16 | 1963-01-15 | 1963-07-17 | $7700.00 | Window Closed / Lapsed |