US3188509A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glow-discharge digit lamp
Assignee: US Philips Corp
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Filing: 1961-05-29
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Granted: 1965-06-08
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Expires: 1981-05-29
Abstract
No abstract record available.
Inventors
- 👤 Berg Dirk Arie Van Den
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:29
CPC Classifications
H; H01; H01J; H01J17/00; H01J17/38; H01J17/48; H01J17/49; H01J2893/00; H01J2893/0069
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
101 words
A GLOW-DISCHARGE INDICATOR TUBE COMPRISING A GASFILLED ENVELOPE HAVING A TRANSPARENT WINDOW, A STACK OF CHARACTER-SHAPED CATHODE ELECTRODES ARRANGED IN TWO GROUPS OF FIVE CATHODES, A SCREEN ELECTRODE BETWEEN THE TWO GROUPS OF ELECTRODES, AN ANODE ASSOCIATED WITH EACH GROUPS OF CATHODES WHEREBY WITH A POTENTIAL APPLIED BETWEEN A CATHODE OF ONE GROUP AND ITS ASSOCIATED ANODE A GLOW-DISCHARGE APPEARS AT SAID CATHODE, AND A SEPARATE CHARACTER-SHAPED CATHODE ELECTRODE SPACED FROM SAID STACK AND IN THE PLANE OF SAID SCREEN AND IN GLOW-DISCHARGE RELATIONSHIP WITH THE ANODE ASSOCIATED WITH EACH STACK WHEREBY WITH A POTENTIAL APPLIED THERETO AND CATHODE CAN GLOW.
References Cited (Backward Citations)
US2906906A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-06-07 | 1968-12-07 | 1969-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-07 | 1972-12-07 | 1973-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-07 | 1976-12-07 | 1977-06-08 | $7700.00 | Window Closed / Lapsed |