Patent US3242378A successfully refreshed from Google Patents.
US3242378A
Expired / Lapsed
US
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Discharge indicator tube
Assignee: International Standard Electric Corp
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Filing: 1962-06-12
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Granted: 1966-03-22
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Expires: 1982-06-12
Abstract
No abstract record available.
Inventors
- 👤 Kobayashi Haruhiro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:48
CPC Classifications
H; H01; H01J; H01J17/00; H01J17/38; H01J17/48; H01J17/49; H01J17/491
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
A COLD CATHODE GAS FILLED DISCHARGE TUBE COMPRISING AN ANODE; AT LEAST ONE CATHODE, HAVING AN APERTURE THERETHROUGH, DISPOSED IN FACTING RELATION TO SAID ANODE AND FORMING THEREWITH A MAIN DISCHARGE GAP; MEANS FOR SUPPLYING DIFFERENT BIAS POTENTIALS TO SAID ANODE AND CATHODE; AT LEAST ONE KEEP-ALIVE CATHODE, DISPOSED IN PROXIMITY OF SAID APERTURE ON THE SIDE OPPOSITE SAID ANODE, DEFINING WITH SAID FIRST MENTIONED CATHODE AN AUXILIARY KEEP-ALIVE DISCHARGE GAP; MEANS FOR SUPPLYING A VOLTAGE TO SAID KEEP-ALIVE CATHODE WHICH IS SUFFICIENTLY MORE NEGATIVE THAN THE BIAS VOLTAGE ON SAID CATHODE TO CREATE A GLOW DISCHARGE BETWEEN SAID CATHODES, AND AT LEAST ONE CONTROL ELECTRODE DISPOSED ADJACENT SAID APERTURE IN THE MAIN DISCHARGE GAP; MEANS INCLUDING A SOURCE OF INPUT PULSES FOR SUPPLYING SAID CONTROL ELECTRODES WITH VOLTAGES FOR CONTROLLING THE DIFFUSION OF CHARGE PARTICLES INTO SAID MAIN GAP.
Claim 2
Dependent Claim
140 words
A COLD CATHODE GAS FILLED DISCHARGE TUBE COMPRISING AN ANODE; AT LEAST ONE CATHODE, HAVING AN APERTURE THERETHROUGH, DISPOSED IN FACTING RELATION TO SAID ANODE AND FORMING THEREWITH A MAIN DISCHARGE GAP; MEANS FOR SUPPLYING DIFFERENT BIAS POTENTIALS TO SAID ANODE AND CATHODE; AT LEAST ONE KEEP-ALIVE CATHODE, DISPOSED IN PROXIMITY OF SAID APERTURE ON THE SIDE OPPOSITE SAID ANODE, DEFINING WITH SAID FIRST MENTIONED CATHODE AN AUXILIARY KEEP-ALIVE DISCHARGE GAP; MEANS FOR SUPPLYING A VOLTAGE TO SAID KEEP-ALIVE CATHODE WHICH IS SUFFICIENTLY MORE NEGATIVE THAN THE BIAS VOLTAGE ON SAID CATHODE TO CREATE A GLOW DISCHARGE BETWEEN SAID CATHODES, AND AT LEAST ONE CONTROL ELECTRODE DISPOSED ADJACENT SAID APERTURE IN THE MAIN DISCHARGE GAP; MEANS INCLUDING A SOURCE OF INPUT PULSES FOR SUPPLYING SAID CONTROL ELECTRODES WITH VOLTAGES FOR CONTROLLING THE DIFFUSION OF CHARGE PARTICLES INTO SAID MAIN GAP.
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) | 1969-03-21 | 1969-09-20 | 1970-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-21 | 1973-09-20 | 1974-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-21 | 1977-09-20 | 1978-03-22 | $7700.00 | Window Closed / Lapsed |