Patent US3058214A successfully refreshed from Google Patents.
US3209188A
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Iodine-containing electric incandescent lamp with heat conserving envelope
Assignee: Westinghouse Electric Corp
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Filing: 1961-02-21
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Granted: 1965-09-28
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Expires: 1981-02-21
Abstract
No abstract record available.
Inventors
- 👤 George A Freeman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:46
CPC Classifications
H; H01; H01K; H01K1/00; H01K1/52; H01K1/54; H01K1/28; H01K1/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
AN ELECTRIC INCANDESCNET LAMP HAVING A PREDETERMINED RATED VOLTAGE AND COMPRISING, IN COMBINATION, A SEALED LIGHT-TRANSMITTING ENVELOPE CONTAINING A FILLING OF INERT GAS AND FROM ABOUT .01 TO 1 MICROMOLE OF IODINE PER CUBIC CENTIMETER OF ENVELOPE VOLUME, A TUNGSTEN FILAMENT SUPPORTED WITHIN SAID ENVELOPE AND ADAPTED WHEN LIGHTED AT SAID RATED VOLTAGE TO ATTAIN AN OPERATING TEMPERATURE ABOVE 1400*C. AND HEAT THE INNER SURFACE OF SAID ENVELOPE TO A TEMPERATURE BELOW 250*C., AND LIGHTTRANSMITTING MEANS ON AT LEAST A PORTION OF SAID ENVELOPE FOR CONSERVING HEAT GENERATED BY SAID FILAMENT AND MAINTAINING THE OPERATING TEMPERATURE OF THE INNER SURFACE OF SAID ENVELOPE ABOVE 250*C.
Claim 2
Dependent Claim
105 words
AN ELECTRIC INCANDESCNET LAMP HAVING A PREDETERMINED RATED VOLTAGE AND COMPRISING, IN COMBINATION, A SEALED LIGHT-TRANSMITTING ENVELOPE CONTAINING A FILLING OF INERT GAS AND FROM ABOUT .01 TO 1 MICROMOLE OF IODINE PER CUBIC CENTIMETER OF ENVELOPE VOLUME, A TUNGSTEN FILAMENT SUPPORTED WITHIN SAID ENVELOPE AND ADAPTED WHEN LIGHTED AT SAID RATED VOLTAGE TO ATTAIN AN OPERATING TEMPERATURE ABOVE 1400*C. AND HEAT THE INNER SURFACE OF SAID ENVELOPE TO A TEMPERATURE BELOW 250*C., AND LIGHTTRANSMITTING MEANS ON AT LEAST A PORTION OF SAID ENVELOPE FOR CONSERVING HEAT GENERATED BY SAID FILAMENT AND MAINTAINING THE OPERATING TEMPERATURE OF THE INNER SURFACE OF SAID ENVELOPE ABOVE 250*C.
References Cited (Backward Citations)
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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) | 1968-09-27 | 1969-03-29 | 1969-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-27 | 1973-03-29 | 1973-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-27 | 1977-03-29 | 1977-09-28 | $7700.00 | Window Closed / Lapsed |