Patent US2725857A successfully refreshed from Google Patents.
US2725857A
Expired / Lapsed
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Method of and composition for reducing the octane requirement of an engine
Assignee: Standard Oil Co
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Filing: 1954-03-19
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Granted: 1955-12-06
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Expires: 1974-03-19
Abstract
No abstract record available.
Inventors
- 👤 Everett C Hughes
- 👤 John D Bartleson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:52
CPC Classifications
C; C10; C10L; C10L10/00; C10L10/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
A METHOD OF REDUCING THE OCTANE REQUIREMENT OF A DIRTY INTERNAL COMBUSTION ENGINE HAVING LEAD-CONTAINING DEPOSITS ON THE SURFACES FORMING THE COMBUSTION CHAMBERS WHICH COMPRISES COATING THE DEPOSIT-BEARING COMBUSTION CHAMBER SURFACES WITH A COMPOSITION ESSENTIALLY COMPRISING FROM ABOUT 10 TO 90% BY WEIGHT OF A VISXOUS, METAL-ADHERING VEHICLE THAT IS NON-CORROSIVE TO THE ENGINE PARTS AND CONTAINS FROM ABOUT 90 TO 10% OF AN INORGANIC BORON COMPOUND SELECTED FROM THE GROUP CONSISTING OF SILVER BORATE AND COPPER BORATE, AND THEN RUNNING THE ENGINE.
Claim 2
Independent Claim
83 words
A METHOD OF REDUCING THE OCTANE REQUIREMENT OF A DIRTY INTERNAL COMBUSTION ENGINE HAVING LEAD-CONTAINING DEPOSITS ON THE SURFACES FORMING THE COMBUSTION CHAMBERS WHICH COMPRISES COATING THE DEPOSIT-BEARING COMBUSTION CHAMBER SURFACES WITH A COMPOSITION ESSENTIALLY COMPRISING FROM ABOUT 10 TO 90% BY WEIGHT OF A VISXOUS, METAL-ADHERING VEHICLE THAT IS NON-CORROSIVE TO THE ENGINE PARTS AND CONTAINS FROM ABOUT 90 TO 10% OF AN INORGANIC BORON COMPOUND SELECTED FROM THE GROUP CONSISTING OF SILVER BORATE AND COPPER BORATE, AND THEN RUNNING THE ENGINE.
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) | 1958-12-05 | 1959-06-06 | 1959-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-05 | 1963-06-06 | 1963-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-05 | 1967-06-06 | 1967-12-06 | $7700.00 | Window Closed / Lapsed |