US2932618A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine deposit removal
Assignee: Sunoco Inc
•
Filing: 1956-11-15
•
Granted: 1960-04-12
•
Expires: 1976-11-15
Abstract
No abstract record available.
Inventors
- 👤 Jr Paul E Oberdorfer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:42
CPC Classifications
C; C10; C10L; C10L10/00; C10L10/06
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
104 words
A SOLVENT FORMULATION FOR THE REMOVAL OF ENGINE DEPOSITS WHICH COMPRISES FROM ABOUT 10 TO ABOUT 70 VOLUME PERCENT OF A CYCLIC CARBONATE INNER ESTER SELECTED FROM THE GROUP CONSISTING OF ETHYLENE CARBONATE, PROPYLENE CARBONATE, BUTYLENE CARBONATE AND AMYLENE CARBONATE, FROM ABOUT 10 TO ABOUT 30 VOLUME PERCENT OF AN ORGANIC POLAR SOLVENT SELECTED FROM THE GROUP CONSISTING OF ACETONE, DIMETHYL ACETAL, METHYLAL, METHANOL, METHYL ETHYL KETONE, ETHANOL, AND ISOPROPANOL, AND MIXTURES THEREOF, AND FROM ABOUT 20 TO ABOUT 60 VOLUME PERCENT OF AN AQUEOUS SOLUTION SELECTED FROM THE GROUP CONSISTING OF ACETIC ACID AND COMPOUNDS CAPABLE OF YIELDING ACETIC ACID BY THERMAL DECOMPOSITION.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-12 | 1963-10-12 | 1964-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-12 | 1967-10-12 | 1968-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-12 | 1971-10-12 | 1972-04-12 | $7700.00 | Window Closed / Lapsed |