Patent US1889203A successfully refreshed from Google Patents.
Patent USRE27965E successfully refreshed from Google Patents.
USRE27965E
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressurized liquid cooling system
Assignee: —
•
Filing: 1972-02-22
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Granted: 1974-04-09
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Expires: 1992-02-22
Abstract
Abstract A PRESSURIZED COOLING SYSTEM FOR A CONVENTIONAL INTERNAL COMBUSTION ENGINE, WHEREIN THE COOLING SYSTEM INCLUDES AN OVERFLOW PASSAGE COMMUNICATING WITH THE HIGHEST POINT IN THE RADIATOR SYSTEM IN WHICH THERE IS AN OUTFLOW CHECK VALVE SO THAT LIQUID EXPANSION UNSEATS THE CHECK VALVE AND EXCESS LIQUID PASSES THROUGH A PASSAGE TO AN ACCUMULATOR TANK, AND WHEN THE RADIATOR SYSTEM COOLS AND A LOW PRESSURE SUCTION CONDITION IS CREATED, THE LIQUID IN THE TANK IS DRAWN BACK THROUGH THE SAME PASSAGE THROUGH THE SECOND CHECK VALVE WHICH OPENS INWARDLY TOWARD THE RADIATOR TO ALLOW THE LIQUID TO BE RETURNED TO THE RADIATOR.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:10
CPC Classifications
F; F01; F01P; F01P11/00; F01P11/02; F01P11/0204; F01P11/0209; F01P11/0238; F01P11/0285
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) | 1977-04-08 | 1977-10-08 | 1978-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-08 | 1981-10-08 | 1982-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-08 | 1985-10-08 | 1986-04-09 | $7700.00 | Window Closed / Lapsed |