US2779317A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low sulfur
Assignee: —
•
Filing: —
•
Granted: 1957-01-29
•
Expires: 1974-01-29
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:47
CPC Classifications
C; C10; C10M; C10M107/00; C10M107/02; C10M101/00; C10M101/02; C10G; C10G2400/00; C10G2400/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
174 words
IN THE OPERATION OF AN INTERNAL COMBUSTION ENGINE OF THE RECIPROCATING TYPE HAVING A COMPRESSION RATIO ABOVE ABOUT 7:1 IN WHICH AN ESSENTIALLY HYDROCARBON TETRAETHYL LEAD-CONTAINING FUEL COMPOSITION IS INTRODUCED INTO THE COMBUSTION CHAMBER THEREOF UNDER COMBUSTION CONDITIONS, THE IMPROVEMENT FOR REDUCING THE FORMATION IN SAID COMBUSTION CHAMBER OF SULPHUR-CONTAINING DEPOSITS OF THE TYPE THAT INCREASE THE FUEL OCATANE REQUIREMENT OF THE ENGINE, WHICH COMPRISES LUBRICATING THE PARTS OF SAID COMBUSTION CHAMBER SUBJECT TO FRICTION WITH A LUBRICATING OIL HAVING A DECREASED TENDENCY TO CONTRIBUTE TOWARDS OCTANE REQUIREMENT INCREASE IN SAID ENGINE, SAID LUBRICATING OIL CONSISTING ESSENTIALLY OF A MAJOR PORTION OF A MINERAL OIL BASE STOCK WHICH IS A SOLVENT EXTRACTED AND SEWAXED CATALYTIC CYCLE OIL DISTILLATE BOILING WITHIN THE RANGE OF ABOUT 300* TO 600*F. ST AN ABSOLUTE PRESSURE OF ABOUT 10 MM. HG AND A MINOR PORTION OF AT LEAST ONE NON-SULFUR ADDITION AGENT SUFFICIENT IN AMOUNT TO IMPROVE AT LEAST ONE CHARACTERISTIC OF SAID COMPOSITION, SAID LUBRICATING OIL HAVING A TOTAL SULFUR CONTENT NOT SUBSTANTIALLY ABOVE ABOUT 0.1 WEIGHT PERCENT.
Claim 2
Dependent Claim
174 words
IN THE OPERATION OF AN INTERNAL COMBUSTION ENGINE OF THE RECIPROCATING TYPE HAVING A COMPRESSION RATIO ABOVE ABOUT 7:1 IN WHICH AN ESSENTIALLY HYDROCARBON TETRAETHYL LEAD-CONTAINING FUEL COMPOSITION IS INTRODUCED INTO THE COMBUSTION CHAMBER THEREOF UNDER COMBUSTION CONDITIONS, THE IMPROVEMENT FOR REDUCING THE FORMATION IN SAID COMBUSTION CHAMBER OF SULPHUR-CONTAINING DEPOSITS OF THE TYPE THAT INCREASE THE FUEL OCATANE REQUIREMENT OF THE ENGINE, WHICH COMPRISES LUBRICATING THE PARTS OF SAID COMBUSTION CHAMBER SUBJECT TO FRICTION WITH A LUBRICATING OIL HAVING A DECREASED TENDENCY TO CONTRIBUTE TOWARDS OCTANE REQUIREMENT INCREASE IN SAID ENGINE, SAID LUBRICATING OIL CONSISTING ESSENTIALLY OF A MAJOR PORTION OF A MINERAL OIL BASE STOCK WHICH IS A SOLVENT EXTRACTED AND SEWAXED CATALYTIC CYCLE OIL DISTILLATE BOILING WITHIN THE RANGE OF ABOUT 300* TO 600*F. ST AN ABSOLUTE PRESSURE OF ABOUT 10 MM. HG AND A MINOR PORTION OF AT LEAST ONE NON-SULFUR ADDITION AGENT SUFFICIENT IN AMOUNT TO IMPROVE AT LEAST ONE CHARACTERISTIC OF SAID COMPOSITION, SAID LUBRICATING OIL HAVING A TOTAL SULFUR CONTENT NOT SUBSTANTIALLY ABOVE ABOUT 0.1 WEIGHT PERCENT.
References Cited (Backward Citations)
US2660552A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-29 | 1960-07-30 | 1961-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-29 | 1964-07-30 | 1965-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-29 | 1968-07-30 | 1969-01-29 | $7700.00 | Window Closed / Lapsed |