Patent US2956910A successfully refreshed from Google Patents.
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 22:49
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
Cited
US1924722A
Cited
US1941689A
Cited
US1908705A
Cited
US1914509A
Cited
US2281598A
Cited
US2509197A
Cited
US2599649A
Cited
US2753381A
Cited
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 |