Patent US3238408A successfully refreshed from Google Patents.
US3238408A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flicker glow lamps
Assignee: Individual
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Filing: 1962-09-27
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Granted: 1966-03-01
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Expires: 1982-09-27
Abstract
No abstract record available.
Inventors
- 👤 Philip J Kayatt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 07:57
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/64
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
A COLD CATHODE GLOW LAMP COMPRISING TWO SPACED ELECTRODES, EACH ELECTRODE HAVING AN EXPOSED SURFACE FORMED OF A METAL OF THE FERROUS GROUP, AN EMITTING COATING OF BARIUM ON THE EXPOSED SURFACE OF THE CATHODE, SAID EMITTING COATING INCLUDING A TRACE AMOUNT OF NITROGEN, THE INTER-ELECTRODE SPACING BEING WITHIN THE RANGE FROM 0.5 TO 4.0 MILLIMETERS, A GAS-TIGHT ENVELOPE SURROUNDING SAID ELECTRODES, AND A GASEOUS MEDIUM CONFINED IN SAID ENVELOPE AND SURROUNDING SAID ELECTRODES, SAID MEDIUM CONSISTING ESSENTIALLY OF GASES WHICH ARE MEMBERS OF THE ZERO VALENCE GROUP AT A PRESSURE WITHIN THE RANGE FROM 70 TO 120 MILLIMIETERS OF MERCURY, THE ELECTRODES OF SAID LAMP BEING ENERGIZABLE AT A CURRENT DESNITY IN THE RANGE FROM 5 TO 30 MILLIAMPERS PER SQUARE CENTIMETER OF CONDUCTING ELECTRODE AREA TO PRODUCE AN ELECTRICAL DISCHARGE THROUGH SAID MEDIUM WHICH EXHIBITS A FLICKERING FLAME-SIMULATING GLOW EFFECT.
Claim 2
Dependent Claim
142 words
A COLD CATHODE GLOW LAMP COMPRISING TWO SPACED ELECTRODES, EACH ELECTRODE HAVING AN EXPOSED SURFACE FORMED OF A METAL OF THE FERROUS GROUP, AN EMITTING COATING OF BARIUM ON THE EXPOSED SURFACE OF THE CATHODE, SAID EMITTING COATING INCLUDING A TRACE AMOUNT OF NITROGEN, THE INTER-ELECTRODE SPACING BEING WITHIN THE RANGE FROM 0.5 TO 4.0 MILLIMETERS, A GAS-TIGHT ENVELOPE SURROUNDING SAID ELECTRODES, AND A GASEOUS MEDIUM CONFINED IN SAID ENVELOPE AND SURROUNDING SAID ELECTRODES, SAID MEDIUM CONSISTING ESSENTIALLY OF GASES WHICH ARE MEMBERS OF THE ZERO VALENCE GROUP AT A PRESSURE WITHIN THE RANGE FROM 70 TO 120 MILLIMIETERS OF MERCURY, THE ELECTRODES OF SAID LAMP BEING ENERGIZABLE AT A CURRENT DESNITY IN THE RANGE FROM 5 TO 30 MILLIAMPERS PER SQUARE CENTIMETER OF CONDUCTING ELECTRODE AREA TO PRODUCE AN ELECTRICAL DISCHARGE THROUGH SAID MEDIUM WHICH EXHIBITS A FLICKERING FLAME-SIMULATING GLOW EFFECT.
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) | 1969-02-28 | 1969-08-30 | 1970-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-28 | 1973-08-30 | 1974-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-28 | 1977-08-30 | 1978-03-01 | $7700.00 | Window Closed / Lapsed |