US3556846A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of removing manganese oxide deposits
Assignee: Ethyl Corp
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Filing: 1967-12-21
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Granted: 1971-01-19
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Expires: 1987-12-21
Abstract
Abstract A METHOD OF REMOVING MANGANESE CONTAINING DEPOSITS FORMED ON THE SURFACES OF JET ENGINES FROM BURNING FUEL CONTAINING A CYCLOPENTADIENYL MANGANESE TRICARBONYL AS A SMOKE REDUCER, BY TREATING THE DEPOSIT COATED SURFACES WITH AN AQUEOUS SOLUTION OF A MINERAL ACID, AN ORGANIC ACID HAVING AN IONIZATION CONSTANT AT 25*C. GREATER THAN 10-3, EITHER IN THE PRESENCE OR ABSENCE OF H2O2 OR AN H2O2 SOURCE AS A PROMOTER.
Inventors
- 👤 Vincent F Hnizda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:00
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |