US3227922A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic indicator circuit
Assignee: Unisys Corp
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Filing: 1964-11-25
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Granted: 1966-01-04
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Expires: 1984-11-25
Abstract
No abstract record available.
Inventors
- 👤 Glaser David
- 👤 Somlyody Arpad
- 👤 Philip L Nace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:02
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
AN ELECTRONIC CHARACTER INDICATOR CIRCUIT INCLUDING A COLD CATHODE GASEOUS INDICATOR TUBE COMPRISING A GAS-FILLED ENVELOPE CONTAINING AN ANODE ELECTRODE AND A PLURALITY OF CATHODE GLOW ELECTRODES IN THE FORM OF CHARACTERS, EACH CATHODE BEING ADAPTED TO GLOW WITH THE APPLICATION OF A RELATIVELY HIGH POTENTIAL BETWEEN IT AND SAID ANODE, MEANS COUPLED TO SAID ANODE FOR APPLYING RELATIVELY HIGH OPERATING POTENTIAL THERETO WHEREBY CATHODE ELECTRODES WHICH ARE NOT GLOWING TEND TO ASSUME A POTENTIAL APPROXIMATELY EQUAL TO SAID OPERATING POTENTIAL DUE TO THE FLOW OF LEAKAGE CURRENT THERETO FROM SAID ANODE THROUGH THE GAS FILLING IN SAID ENVELOPE, A SEPARATE SEMICONDUCTOR SWITCHING DEVICE COUPLED DIRECTLY AND WITHOUT INVERTING IMPEDANCE ELEMENTS TO EACH CATHODE ELECTRODE FOR CAUSING THE CATHODE TO GLOW, EACH SEMICONDUCTOR DEVICE THUS BEING ADAPTED TO HAVE APPLIED TO ITS SAID RELATIVELY HIGH POTENTIAL OF THE
Claim 2
Dependent Claim
138 words
AN ELECTRONIC CHARACTER INDICATOR CIRCUIT INCLUDING A COLD CATHODE GASEOUS INDICATOR TUBE COMPRISING A GAS-FILLED ENVELOPE CONTAINING AN ANODE ELECTRODE AND A PLURALITY OF CATHODE GLOW ELECTRODES IN THE FORM OF CHARACTERS, EACH CATHODE BEING ADAPTED TO GLOW WITH THE APPLICATION OF A RELATIVELY HIGH POTENTIAL BETWEEN IT AND SAID ANODE, MEANS COUPLED TO SAID ANODE FOR APPLYING RELATIVELY HIGH OPERATING POTENTIAL THERETO WHEREBY CATHODE ELECTRODES WHICH ARE NOT GLOWING TEND TO ASSUME A POTENTIAL APPROXIMATELY EQUAL TO SAID OPERATING POTENTIAL DUE TO THE FLOW OF LEAKAGE CURRENT THERETO FROM SAID ANODE THROUGH THE GAS FILLING IN SAID ENVELOPE, A SEPARATE SEMICONDUCTOR SWITCHING DEVICE COUPLED DIRECTLY AND WITHOUT INVERTING IMPEDANCE ELEMENTS TO EACH CATHODE ELECTRODE FOR CAUSING THE CATHODE TO GLOW, EACH SEMICONDUCTOR DEVICE THUS BEING ADAPTED TO HAVE APPLIED TO ITS SAID RELATIVELY HIGH POTENTIAL OF THE
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-03 | 1969-07-05 | 1970-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-03 | 1973-07-05 | 1974-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-03 | 1977-07-05 | 1978-01-04 | $7700.00 | Window Closed / Lapsed |