US3585390A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Zirconia ceramics and infrared ray radiation elements utilizing the same
Assignee: Individual
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Filing: 1969-02-05
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Granted: 1971-06-15
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Expires: 1989-02-05
Abstract
Abstract Black zirconia ceramics are prepared by firing a mixture containing more than 45 percent, by weight, of a Zr02.Si02 component, up to 25 percent, by weight of a mineralizer consisting of manganese oxide, at least one of oxides of iron, cobalt, nickel or chromium, and the balance of clay. The fired black zirconia ceramics emit a large quantity of infrared rays of long wavelength when heated to about 500* C., and are suitable to effect, heating, baking, cooking, drying, etc.
Inventors
- 👤 Tadashi Ishikawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:15
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/62; C; C04; C04B; C04B35/00; C04B35/01; C04B35/48; H05B3/0033; H05B3/0071; H05B3/0076; H05B3/0085
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
91 words
An infrared ray radiating element comprising an infrared ray radiating member made of fired zirconia ceramics containing more than 45 percent by weight of ZrO2.SiO2 component, up to 25 percent by weight of a mineralizer consisting of manganese oxide, at least one member selected from the group consisting of the oxides of iron, cobalt, nickel and chromium; the balance being clay; and means for heating said infrared ray radiating member to a temperature at which said infrared ray radiating element will emit infrared rays having wavelengths of more than 5 microns.
Claim 2
Dependent Claim
18 words
The infrared ray radiating element according to claim 2 wherein said means for heating is an electric current.
Claim 3
Dependent Claim
60 words
The infrared ray radiating element according to claim 2 wherein said means for heating is heated by hot combustion gas. 5 The infrared ray radiating element according to claim 2 wherein said radiating element is in the form of a disc having a plurality of depressions on both surfaces and a plurality of through holes extending between said both surfaces.
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) | 1974-06-14 | 1974-12-14 | 1975-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-14 | 1978-12-14 | 1979-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-14 | 1982-12-14 | 1983-06-15 | $7700.00 | Window Closed / Lapsed |