Patent US2904458A successfully refreshed from Google Patents.
US2904458A
Expired / Lapsed
US
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Removing combustion chamber deposits from internal combustion engines and compositions
Assignee: Ethyl Corp
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Filing: 1954-09-02
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Granted: 1959-09-15
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Expires: 1974-09-02
Abstract
No abstract record available.
Inventors
- 👤 Fred J Dykstra
- 👤 Clarence A Hall
- 👤 Charles C Shepherd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:21
CPC Classifications
C; C10; C10L; C10L10/00; C10L10/06
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
49 words
A CLEANING COMPOSITION PARTICULARLY ADAPTED FOR REMOVING DEPOSITS FROM INTERNAL COMBUSTION ENGINES CONSISTING ESSENTIALLY, BY VOLUME, OF ABOUT 32 TO 40 PERCENT OF XYLOL, ABOUT 30 TO 32 PERCENT OF GLYCOL MONOMETHYL ETHER, ABOUT 20 TO 24 PERCENT OF TRICHLOROBENZENE AND ABOUT 10 TO 12 PERCENT OF BUTYL AMINE.
References Cited (Backward Citations)
US1787789A
Cited
US2700654A
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US2704733A
Cited
US1386385A
Cited
US2366073A
Cited
US2509197A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-14 | 1963-03-16 | 1963-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-14 | 1967-03-16 | 1967-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-14 | 1971-03-16 | 1971-09-15 | $7700.00 | Window Closed / Lapsed |