US2956910A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removal of combustion chamber deposits
Assignee: ExxonMobil Oil Corp
•
Filing: 1955-09-22
•
Granted: 1960-10-18
•
Expires: 1975-09-22
Abstract
No abstract record available.
Inventors
- 👤 John J Giammaria
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:24
CPC Classifications
C; C23; C23G; C23G5/00; C23G5/02; C23G5/032; C23G5/036; C10; C10L; C10L10/00; C10L10/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
28 words
THE METHOD OF REMOVING COMBUSTION DEPOSITS FROM THE METAL PARTS OF AN INTERNAL COMBUSTION ENGINE WHICH COMPRISES APPLYING N-METHYL-2-PYRROLIDONE TO THE DEPOSITS AND THEN REMOVING THE LOOSENED DEPOSITS.
Claim 2
Independent Claim
28 words
THE METHOD OF REMOVING COMBUSTION DEPOSITS FROM THE METAL PARTS OF AN INTERNAL COMBUSTION ENGINE WHICH COMPRISES APPLYING N-METHYL-2-PYRROLIDONE TO THE DEPOSITS AND THEN REMOVING THE LOOSENED DEPOSITS.
References Cited (Backward Citations)
US2704733A
Cited
US1833429A
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US1924722A
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US1941689A
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US1908705A
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US2509197A
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US2599649A
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US2753381A
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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) | 1963-10-18 | 1964-04-18 | 1964-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-18 | 1968-04-18 | 1968-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-18 | 1972-04-18 | 1972-10-18 | $7700.00 | Window Closed / Lapsed |