US3564207A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric infrared heater
Assignee: Infra Red Systems Inc
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Filing: 1969-07-24
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Granted: 1971-02-16
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Expires: 1989-07-24
Abstract
Abstract An electric heater for emitting infrared radiations having a plurality of insulating elements adhesively sandwiched between a pair of superimposed sheets to form a maze therein with a zigzag passageway, and a continuous infrared radiating element disposed in the passageway with terminals at both ends thereof. The sheets are composed of fibrous aluminum oxide and silicon dioxide and interstices in the sheets are filled with silicon dioxide particles to provide a good emitter of infrared radiation having an emissivity factor of about 90 percent.
Inventors
- 👤 Stanley V Joeckel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:02
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/20; H05B3/22; H05B3/28; H05B3/283
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
An electric heater for emitting infrared radiations comprising a pair of superimposed sheets, a plurality of insulating elements composed of aluminum oxide and silicon dioxide and being sandwiched and adhesively secured between said sheets to form a maze therein, said maze having a zigzag passageway formed therein, and a continuous infrared radiating element disposed in said passageway, electrical terminals connected to the ends of said infrared radiating elements and extending from said insulating maze, said sheets being composed of fibrous aluminum oxide and silicon dioxide having interstices therein filled with silicon dioxide particles to provide an emitter of infrared radiation having an emissivity factor of about 90 percent, said sheets being capable of withstanding 2,300* F.
Claim 2
Dependent Claim
116 words
An electric heater for emitting infrared radiations comprising a pair of superimposed sheets, a plurality of insulating elements composed of aluminum oxide and silicon dioxide and being sandwiched and adhesively secured between said sheets to form a maze therein, said maze having a zigzag passageway formed therein, and a continuous infrared radiating element disposed in said passageway, electrical terminals connected to the ends of said infrared radiating elements and extending from said insulating maze, said sheets being composed of fibrous aluminum oxide and silicon dioxide having interstices therein filled with silicon dioxide particles to provide an emitter of infrared radiation having an emissivity factor of about 90 percent, said sheets being capable of withstanding 2,300* F.
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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) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |