US3321083A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiator water filter
Assignee: Fram Corp
•
Filing: 1963-08-08
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Granted: 1967-05-23
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Expires: 1983-08-08
Abstract
No abstract record available.
Inventors
- 👤 Donald I Thornton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:12
CPC Classifications
F; F01; F01P; F01P11/00; F01P11/06; B; B01; B01D; B01D27/00; B01D27/04; B01D27/06; B01D27/08; F01P2011/061
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
112 words
A SCREW-ON THROW-AWAY TYPE OF WATER FILTER AND WATER CONDITIONER FOR THE WATER IN THE COOLING SYSTEM OF AN INTERNAL COMBUSTION ENGINE, COMPRISING A SCREW-ON TYPE OF FILTER HOUSING CONNECTED IN THE COOLING SYSTEM SO THAT AT LEAST PART OF THE CIRCULATING WATER WILL PASS THROUGH THE HOUSING, A PLEATED PAPER FILTER CARTRIDGE PERMANENTLY MOUNTED IN SAID HOUSING, SAID PAPER HAVING ABSORBED THEREIN, IN AN AMOUNT CLOSE TO ITS LIQUID-RETAINING CAPACITY, A WATER SOLUBLE OR DISPERSIBLE LIQUID CORROSION INHIBITOR SO THAT THIS INHIBITOR WILL BE PICKED UP BY THE WATER PASSING THROUGH THE CARTRIDGE AND DEPOSITED AS A PROTECTIVE FILM ON THE WALLS OF THE RADIATOR AND COOLING PASSAGES OF THE ENGINE.
References Cited (Backward Citations)
US1987847A
Cited
GB715454A
Cited
US2785805A
Cited
US2796989A
Cited
US2877902A
Cited
US2855330A
Cited
US2893561A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-05-22 | 1970-11-21 | 1971-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-22 | 1974-11-21 | 1975-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-22 | 1978-11-21 | 1979-05-23 | $7700.00 | Window Closed / Lapsed |