US2968585A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removal of combustion chamber deposits
Assignee: ExxonMobil Oil Corp
•
Filing: 1955-09-22
•
Granted: 1961-01-17
•
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
2026-10-24 21:24
CPC Classifications
C; C10; C10L; C10L10/00; C10L10/06; F; F02; F02B; F02B77/00; F02B77/04
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 HEXAMETHYLPHOSPHORAMIDE 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 HEXAMETHYLPHOSPHORAMIDE TO THE DEPOSITS AND THEN REMOVING THE LOOSENED DEPOSITS.
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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) | 1964-01-17 | 1964-07-18 | 1965-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-17 | 1968-07-18 | 1969-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-17 | 1972-07-18 | 1973-01-17 | $7700.00 | Window Closed / Lapsed |