Patent US3725212A successfully refreshed from Google Patents.
US3725212A
Expired / Lapsed
US
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Method for testing radiator-tube-clogging property of antifreezing coolants
Assignee: Mitsubishi Motors Corp
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Filing: 1971-03-04
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Granted: 1973-04-03
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Expires: 1991-03-04
Abstract
Abstract A METHOD OF RAPIDLY TESTING RADIATOR TUBE CLOGGING PROPERTIES OF ANTIFREEZING COOLANTS FOR AUTOMOTIVE EN- INES IN WHICH THE COOLANT TO BE TESTED IS CIRCULATED THROUGH A HEATING ZONE AND A COOLING ZONE. METAL PIECES ARE INSERTED IN HE COOLANT IN THE HEATING ZONE AND A SOURCE OF ELECTRIC CURRENT IS CONNECTED TO THE METAL PIECES FOR ELECTROLYZING THE SAME AND THE AMOUNT OF MATERIAL DEPOSITED IN THE COOLING ZONE IS MEASURED.
Inventors
- 👤 S Kawamoto
- 👤 H Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:44
CPC Classifications
G; G01; G01N; G01N31/00; G01N31/02; G01N17/00; G01N17/02
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) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |