Patent US3769188A successfully refreshed from Google Patents.
US3769188A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of removing oil from engine coolant
Assignee: ELECTROSTATIC EQUIP CORP
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Filing: 1969-01-21
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Granted: 1973-10-30
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Expires: 1989-01-21
Abstract
Abstract A process of treating cooling water to remove engine oil and to eliminate undesirable oil deposits in an internal combustion engine by subjecting the cooling water to a constant electrostatic field, by substantially insulating from ground all equipment through which the fluid passes, and then by delivering the cooling fluid to a reservoir having grounded electrodes.
Inventors
- 👤 Mahon R Mc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:30
CPC Classifications
B; B01; B01D; B01D17/00; B01D17/06; B03; B03C; B03C5/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
25 words
The process as in claim 1, said electrostatic field applied by a direct current voltage potential in the range of 500 to 3, 000 volts.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |