Patent US4969470A successfully refreshed from Google Patents.
Patent US3242978A successfully refreshed from Google Patents.
US3242978A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric control apparatus for a plurality of temperature-affecting units
Assignee: INTERNATIONAL OIL BURNER CO
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Filing: 1962-11-13
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Granted: 1966-03-29
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Expires: 1982-11-13
Abstract
No abstract record available.
Inventors
- 👤 John L Mcgann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:16
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
THE COMBINATION OF AN ELECTRICAL HEATING UNIT, AN ELECTRICAL COOLING UNIT, AND AN ELECTRICAL CONTROL SYSTEM COMPRISING A THERMOSTAT RESPONSIVE TO CHANGES IN ROOM TEMPERATURE INCLUDING THE EFFECT THEREON OF THE ACTUATION AND DEACTUATION OF SAID HEATING AND COOLING UNITS, AN ELECTRICAL CONTROL HEATER, MEANS TO DELIMIT A CONTROL ENVIRONMENT ABOUT THE CONTROL HEATER, THERMOSWITCHES WITHIN ITHE CONTROL ENVIRONMENT HEATED BY THE HEATER, EACH CONNECTED IN CIRCUIT WITH ONE OF SAID HEATING OR COOLING UNITS, SAID THERMOSWITCHES BEING SET TO OPERATE AT DIFFERENT TEMPERATURES, A LIMIT THERMOSWITCH WITHIN THE CONTROL ENVIRONMENT HEATED BY THE HEATER AND SET AT A TEMPERATURE INTERMEDIATE BETWEEN THE SETTINGS OF THE THERMOSWITCHES CONNECTED TO SAID HEATING AND COOLING UNITS, AND
Claim 2
Dependent Claim
115 words
THE COMBINATION OF AN ELECTRICAL HEATING UNIT, AN ELECTRICAL COOLING UNIT, AND AN ELECTRICAL CONTROL SYSTEM COMPRISING A THERMOSTAT RESPONSIVE TO CHANGES IN ROOM TEMPERATURE INCLUDING THE EFFECT THEREON OF THE ACTUATION AND DEACTUATION OF SAID HEATING AND COOLING UNITS, AN ELECTRICAL CONTROL HEATER, MEANS TO DELIMIT A CONTROL ENVIRONMENT ABOUT THE CONTROL HEATER, THERMOSWITCHES WITHIN ITHE CONTROL ENVIRONMENT HEATED BY THE HEATER, EACH CONNECTED IN CIRCUIT WITH ONE OF SAID HEATING OR COOLING UNITS, SAID THERMOSWITCHES BEING SET TO OPERATE AT DIFFERENT TEMPERATURES, A LIMIT THERMOSWITCH WITHIN THE CONTROL ENVIRONMENT HEATED BY THE HEATER AND SET AT A TEMPERATURE INTERMEDIATE BETWEEN THE SETTINGS OF THE THERMOSWITCHES CONNECTED TO SAID HEATING AND COOLING UNITS, AND
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) | 1969-03-28 | 1969-09-27 | 1970-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-28 | 1973-09-27 | 1974-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-28 | 1977-09-27 | 1978-03-29 | $7700.00 | Window Closed / Lapsed |