Patent US3413441A successfully refreshed from Google Patents.
US3413441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Long wavelength (far infrared) radiation heating device
Assignee: Kokusai Denki Electric Inc
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Filing: 1965-11-22
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Granted: 1968-11-26
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Expires: 1985-11-22
Abstract
No abstract record available.
Inventors
- 👤 Isobe Kosaku
- 👤 Linuma Hajime
- 👤 Tanaka Yukio
- 👤 Soya Katsuji
- 👤 Yamagishi Hitoshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:09
CPC Classifications
B; B29; B29C; B29C35/00; B29C35/02; B29C35/08; H; H05; H05B; H05B3/00; H05B3/62; H05B3/64; B29C35/0805; B29C2035/0822
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
A LONG WAVELENGTH RADIATION HEATING DEVICE COMPRISING A HOLLOW CYLINDRICAL HEATING ELEMENT ADAPTED TO HEAT WITHIN ITS HOLLOW INTERIOR ARTICLES TO BE HEATED WITH LONG WAVELENGTH INFRARED RADIATION RAYS, POWER SUPPLY MEANS CONNECTED TO THE HEATING ELEMENT TO SUPPLY ELECTRICAL POWER THERETO, AND AN OUTER HOLLOW CYLINDER DISPOSED CONCENTRICALLY AROUND THE HEATING ELEMENT AND HAVING LOW EMISSIVITY AND EXCELLENT REFLECTING CHARACTERISTIC WITH RESPECT TO SHORT WAVELENGTH RADIATION RAYS, SAID CYLINDRICAL HEATING ELEMENT BEING COATED OVER ITS ENTIRE INNER SURFACE WITH A FIRST SUBSTANCE HAVING HIGH EMMISSIVITY AND LONG WAVELENGTH RADIATION CHARACTERISTICS AND OVER ITS ENTIRE OUTER SURFACE WITH A SECOND SUBSTANCE HAVING LOW EMISSIVITY AND SHORT WAVELENGTH RADIATION CHARACTERISTICS.
Claim 2
Dependent Claim
109 words
A LONG WAVELENGTH RADIATION HEATING DEVICE COMPRISING A HOLLOW CYLINDRICAL HEATING ELEMENT ADAPTED TO HEAT WITHIN ITS HOLLOW INTERIOR ARTICLES TO BE HEATED WITH LONG WAVELENGTH INFRARED RADIATION RAYS, POWER SUPPLY MEANS CONNECTED TO THE HEATING ELEMENT TO SUPPLY ELECTRICAL POWER THERETO, AND AN OUTER HOLLOW CYLINDER DISPOSED CONCENTRICALLY AROUND THE HEATING ELEMENT AND HAVING LOW EMISSIVITY AND EXCELLENT REFLECTING CHARACTERISTIC WITH RESPECT TO SHORT WAVELENGTH RADIATION RAYS, SAID CYLINDRICAL HEATING ELEMENT BEING COATED OVER ITS ENTIRE INNER SURFACE WITH A FIRST SUBSTANCE HAVING HIGH EMMISSIVITY AND LONG WAVELENGTH RADIATION CHARACTERISTICS AND OVER ITS ENTIRE OUTER SURFACE WITH A SECOND SUBSTANCE HAVING LOW EMISSIVITY AND SHORT WAVELENGTH RADIATION CHARACTERISTICS.
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) | 1971-11-26 | 1972-05-27 | 1972-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-26 | 1976-05-27 | 1976-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-26 | 1980-05-27 | 1980-11-26 | $7700.00 | Window Closed / Lapsed |