Patent US3769775B1 successfully refreshed from Google Patents.
US3147368A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Convection heating apparatus
Assignee: Individual
•
Filing: 1961-03-13
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Granted: 1964-09-01
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Expires: 1981-03-13
Abstract
No abstract record available.
Inventors
- 👤 Henry E Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:24
CPC Classifications
F; F04; F04D; F04D17/00; F04D17/02; F04D17/04; F24; F24H; F24H3/00; F24H3/02; F24H3/04; F24H3/0405; F24H3/0411
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
A BASEBOARD TYPE CIRCULATING AIR HEATER TO BE OPERATED FROM A SOURCE OF ELECTRICAL POWER COMPRISING: AN ELONGATE HOUSING DEFINING AN AIR PASSAGE HAVING AIR INLET AND AIR OUTLET MEANS; AN ELONGATE ELECTRICAL RESISTANCE HEATING ELEMENT POSITIONED IN SAID AIR PASSAGE; THERMOSTAT MEANS FOR PROVIDING ELECTRICAL CONTROL OF SAID HEATING ELEMENT, SAID ELEMENT BEING CONNECTED WITH SAID THERMOSTAT MEANS AND ADAPTED TO BE CONNECTED TO SAID SOURCE OF ELECTRICAL POWER WHEREBY SAID THERMOSTAT MEANS CONTROLS THE POWER RECEIVED BY SAID HEATING ELEMENT; AN ELONGATE IMPELLER POSITIONED IN SAID AIR PASSAGE PARALLEL TO SAID HEATING ELEMENT AND FOR FORCING AIR THROUGH SAID PASSAGE; A MOTOR RIGIDLY AFFIXED TO SAID IMPELLER AND BEING ELECTRICALLY CONNECTED TO SAID HEATING ELEMENT WHEREBY SAID MOTOR IS ENERGIZED IN COINCIDENCE WITH SAID HEATING ELEMENT; AND ANGULARLY FLEXIBLE MOTOR MOUNTING MEANS FOR SUPPORTING SAID MOTOR IN SAID HOUSING.
Claim 2
Dependent Claim
141 words
A BASEBOARD TYPE CIRCULATING AIR HEATER TO BE OPERATED FROM A SOURCE OF ELECTRICAL POWER COMPRISING: AN ELONGATE HOUSING DEFINING AN AIR PASSAGE HAVING AIR INLET AND AIR OUTLET MEANS; AN ELONGATE ELECTRICAL RESISTANCE HEATING ELEMENT POSITIONED IN SAID AIR PASSAGE; THERMOSTAT MEANS FOR PROVIDING ELECTRICAL CONTROL OF SAID HEATING ELEMENT, SAID ELEMENT BEING CONNECTED WITH SAID THERMOSTAT MEANS AND ADAPTED TO BE CONNECTED TO SAID SOURCE OF ELECTRICAL POWER WHEREBY SAID THERMOSTAT MEANS CONTROLS THE POWER RECEIVED BY SAID HEATING ELEMENT; AN ELONGATE IMPELLER POSITIONED IN SAID AIR PASSAGE PARALLEL TO SAID HEATING ELEMENT AND FOR FORCING AIR THROUGH SAID PASSAGE; A MOTOR RIGIDLY AFFIXED TO SAID IMPELLER AND BEING ELECTRICALLY CONNECTED TO SAID HEATING ELEMENT WHEREBY SAID MOTOR IS ENERGIZED IN COINCIDENCE WITH SAID HEATING ELEMENT; AND ANGULARLY FLEXIBLE MOTOR MOUNTING MEANS FOR SUPPORTING SAID MOTOR IN SAID HOUSING.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-01 | 1968-03-02 | 1968-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-01 | 1972-03-02 | 1972-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-01 | 1976-03-02 | 1976-09-01 | $7700.00 | Window Closed / Lapsed |