US2894166A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat radiation devices
Assignee: WC Heraus GmbH and Co KG
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Filing: 1955-05-18
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Granted: 1959-07-07
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Expires: 1975-05-18
Abstract
No abstract record available.
Inventors
- 👤 Mohn Heinrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:51
CPC Classifications
A; A61; A61N; A61N5/00; A61N5/06; H; H01; H01K; H01K1/00; H01K1/28; H01K1/34; Y; Y02; Y02B; Y02B20/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
100 words
A HEAT RADIATION DEVICE ADAPTED TO RADIATE AT LEAST 1.5 WATT PER SQUARE CENTIMETRE OF ITS SURFACE, COMPRISING AN ELONGATED ELECTRIC HEAT CONDUCTOR, A HERMETICALLY SEALED TUBE ARRANGED TO ENCLOSE THE ELECTRIC HEATING CONDUCTOR CENCENTRICALLY AT A SMALL DISTANCE THEREFROM, THE TUBE BEING OF A SILICON DIOXIDE MATERIAL SELECTED FROM THE GROUP CONSISTING OF MILKY OPALESCENT QUARTZ AND QUARTZ WARE, AND A GAS MIXTURE FILLING SAID TUBE, THE GAS MIXTURE COMPRISING 85 TO 99% OF RARE GASES, THE REMAINDER BEING GASES SELECTED FROM THE GROUP CONSISTING OF NITROGEN AND HYDROGEN, AND THE TOTAL GAS PRESSURE BEING ABOVE 500 MM. HG.
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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) | 1962-07-06 | 1963-01-05 | 1963-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-06 | 1967-01-05 | 1967-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-06 | 1971-01-05 | 1971-07-07 | $7700.00 | Window Closed / Lapsed |