Patent US3134374A successfully refreshed from Google Patents.
US3134374A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil and water preheater for internal combustion engines
Assignee: Individual
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Filing: 1963-08-26
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Granted: 1964-05-26
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Expires: 1983-08-26
Abstract
No abstract record available.
Inventors
- 👤 James H Stevens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:06
CPC Classifications
F; F01; F01M; F01M5/00; F01M5/02; F01M5/021; F02; F02N; F02N19/00; F02N19/02; F02N19/04; F02N19/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
A PREHEATER FOR INTERNAL COMBUSTION ENGINES COMPRISING A HOUSING, AN OIL PREHEATER AND A WATER PREHEATER DISPOSED IN SAID HOUSING, MEANS IN SAID HOUSING FOR APPLYING HEAT TO EACH OF SAID PREHEATERS, PASSAGE MEANS CONNECTING SAID HEATERS TO THE LUBRICATING AND COOLING SYSTEMS RESPECTIVELY OF AN INTERNAL COMBUSTION ENGINE, EACH OF SAID PASSAGE MEANS INCLUDING A FLUID CIRCULATING PUMP, COMMON DRIVE MEANS CONNECTED TO BOTH OF SAID PUMPS.
Claim 2
Dependent Claim
68 words
A PREHEATER FOR INTERNAL COMBUSTION ENGINES COMPRISING A HOUSING, AN OIL PREHEATER AND A WATER PREHEATER DISPOSED IN SAID HOUSING, MEANS IN SAID HOUSING FOR APPLYING HEAT TO EACH OF SAID PREHEATERS, PASSAGE MEANS CONNECTING SAID HEATERS TO THE LUBRICATING AND COOLING SYSTEMS RESPECTIVELY OF AN INTERNAL COMBUSTION ENGINE, EACH OF SAID PASSAGE MEANS INCLUDING A FLUID CIRCULATING PUMP, COMMON DRIVE MEANS CONNECTED TO BOTH OF SAID PUMPS.
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) | 1967-05-26 | 1967-11-25 | 1968-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-26 | 1971-11-25 | 1972-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-26 | 1975-11-25 | 1976-05-26 | $7700.00 | Window Closed / Lapsed |