Patent US3138739A successfully refreshed from Google Patents.
US3138739A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrodeless lamp having a sheathed probe
Assignee: Gen Tech Corp
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Filing: 1961-12-26
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Granted: 1964-06-23
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Expires: 1981-12-26
Abstract
No abstract record available.
Inventors
- 👤 Donald J Farmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:17
CPC Classifications
H; H01; H01J; H01J65/00; H01J65/04; H01J65/042; H01J65/048
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
A DISCHARGE TUBE COMPRISING A SEALED VESSEL CONTAINING AN ALKALI METAL VAPORIZED AT LEAST IN PART AND ARRANGED TO SUPPORT AN ELECTRIC DISCHARGE UNDER THE INFLUENCE OF AN EXTERNALLY APPLIED ELECTROMAGNETIC FIELD, AND A COATED THERMALLY CONDUCTIVE PROBE INSERTED IN SAID VESSEL AND CONNECTED TO AN EXTERNAL TEMPERATURE CONTROLLING MEANS, SAID PROBE HAVING A COATING OF AN INERT MATERIAL SEPARATING THE PROBE FROM THE CONTENTS OF THE SEALED VESSEL.
Claim 2
Dependent Claim
69 words
A DISCHARGE TUBE COMPRISING A SEALED VESSEL CONTAINING AN ALKALI METAL VAPORIZED AT LEAST IN PART AND ARRANGED TO SUPPORT AN ELECTRIC DISCHARGE UNDER THE INFLUENCE OF AN EXTERNALLY APPLIED ELECTROMAGNETIC FIELD, AND A COATED THERMALLY CONDUCTIVE PROBE INSERTED IN SAID VESSEL AND CONNECTED TO AN EXTERNAL TEMPERATURE CONTROLLING MEANS, SAID PROBE HAVING A COATING OF AN INERT MATERIAL SEPARATING THE PROBE FROM THE CONTENTS OF THE SEALED VESSEL.
References Cited (Backward Citations)
US1698691A
Cited
US2974243A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-23 | 1967-12-23 | 1968-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-23 | 1971-12-23 | 1972-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-23 | 1975-12-23 | 1976-06-23 | $7700.00 | Window Closed / Lapsed |