US3222497A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrically heated bedcover
Assignee: General Electric Co
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Filing: 1963-04-30
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Granted: 1965-12-07
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Expires: 1983-04-30
Abstract
No abstract record available.
Inventors
- 👤 Jr Walter H Gordon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:46
CPC Classifications
H; H05; H05B; H05B1/00; H05B1/02; H05B1/0202; H05B1/0213; H05B3/00; H05B3/20; H05B3/34; H05B3/342; H05B2203/00; H05B2203/002; H05B2203/003; H05B2203/014; H05B2203/016; H05B2203/017; H05B2203/033
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
139 words
AN ELECTRICALLY HEATED BEDCOVER COMPRISING: (A) A FABRIC BLANKET SHELL; (B) AN ELECTRIC HEATER DISTRIBUTED OVER SAID SHELL TO PROVIDE AN ELECTRICALLY HEATED AREA; (C) TEMPERATURE SENSOR EXTENDING OVER THE ENTIRE HEATED AREA OF SAID SHELL INDEPENDENTLY OF SAID HEATER AND IN A PATTENT TO SENSE ANY ABNORMALLY HIGH TEMPERATURE OF ANY PORTION OF SAID HEATER, SAID TEMPERATURE SENSOR INCLUDING A PAIR OF LOW RESISTANCE CONDUCTORS IN CLOSELY SPACED RELATED SEPARATED BY AN INSULATING MATERIAL COMPRISING A BASIC PLASTIC COMPOUND AND AN IONIC ADDITIVE THEREBY TO PROVIDE A CONTINUOUS FLEXIBLE LAYER BETWEEN SAID CONDUCTORS WHICH IS ESSENTIALLY AN INSULATOR AT NORMAL OPERATING TEMPERATURES AND CONDUCTS CURRENTS OF CONTROL MAGNITUDE AT TEMPERATURES ABOVE NORMAL; (D) AND A CONTROL SYSTEM TO DE-ENERGIZE SAID ELECTRIC HEATER RESPONSIVE TO TEMPERATURE SENSITIVE CURRENT FLOW THROUGH ANY PORTION OF THE LAYER OF SAID TEMPERATURE SENSOR.
Claim 2
Dependent Claim
139 words
AN ELECTRICALLY HEATED BEDCOVER COMPRISING: (A) A FABRIC BLANKET SHELL; (B) AN ELECTRIC HEATER DISTRIBUTED OVER SAID SHELL TO PROVIDE AN ELECTRICALLY HEATED AREA; (C) TEMPERATURE SENSOR EXTENDING OVER THE ENTIRE HEATED AREA OF SAID SHELL INDEPENDENTLY OF SAID HEATER AND IN A PATTENT TO SENSE ANY ABNORMALLY HIGH TEMPERATURE OF ANY PORTION OF SAID HEATER, SAID TEMPERATURE SENSOR INCLUDING A PAIR OF LOW RESISTANCE CONDUCTORS IN CLOSELY SPACED RELATED SEPARATED BY AN INSULATING MATERIAL COMPRISING A BASIC PLASTIC COMPOUND AND AN IONIC ADDITIVE THEREBY TO PROVIDE A CONTINUOUS FLEXIBLE LAYER BETWEEN SAID CONDUCTORS WHICH IS ESSENTIALLY AN INSULATOR AT NORMAL OPERATING TEMPERATURES AND CONDUCTS CURRENTS OF CONTROL MAGNITUDE AT TEMPERATURES ABOVE NORMAL; (D) AND A CONTROL SYSTEM TO DE-ENERGIZE SAID ELECTRIC HEATER RESPONSIVE TO TEMPERATURE SENSITIVE CURRENT FLOW THROUGH ANY PORTION OF THE LAYER OF SAID TEMPERATURE SENSOR.
References Cited (Backward Citations)
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US2846560A
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US2961526A
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US3119926A
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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) | 1968-12-06 | 1969-06-07 | 1969-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-06 | 1973-06-07 | 1973-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-06 | 1977-06-07 | 1977-12-07 | $7700.00 | Window Closed / Lapsed |