Patent US3154720A successfully refreshed from Google Patents.
US3154720A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid state display device
Assignee: RCA Corp
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Filing: 1960-04-29
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Granted: 1964-10-27
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Expires: 1980-04-29
Abstract
No abstract record available.
Inventors
- 👤 Cooperman Michael
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:01
CPC Classifications
G; G09; G09G; G09G3/00; G09G3/20; G09G3/22; G09G3/30; G09G2300/00; G09G2300/08; G09G2300/088; G09G2300/0885
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
87 words
AN ELECTROLUMINESCENT DISPLAY SYSTEM COMPRISING AN ELECTROLUMINESCENT PHOSPHOR, A FIRST PLURALITY OF SPACED APART ELECTRICAL CONDUCTORS EXTENDING ACROSS ONE SURFACE OF SAID ELECTROLUMINESCENT PHOSPHOR AND IN ONE DIRECTION, A SECOND PLURALITY OF SPACED APART ELECTRICAL CONDUCTORS EXTENDING ACROSS ANOTHER SURFACE OF SAID ELECTROLUMINESCENT PHOSPHOR AND IN AN OPPOSITE DIRECTION, MEANS FOR APPLYING VOLTAGES TO SELECTED ONES OF SAID FIRST AND SAID SECOND PLURALITY OF ELECTRICAL CONDUCTORS, SAID MEANS INCLUDING AT LEAST ONE FERRO-ELECTRIC MEMBER AND MEANS FOR APPLYING A SAWTOOTH VOLTAGE WAVE FORM TO SAID FERROELECTRIC MEMBER.
References Cited (Backward Citations)
US2942131A
Cited
FR1117682A
Cited
US2755457A
Cited
US2880346A
Cited
US2877371A
Cited
US2917667A
Cited
US2886731A
Cited
US2875380A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-10-27 | 1968-04-27 | 1968-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-27 | 1972-04-27 | 1972-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-27 | 1976-04-27 | 1976-10-27 | $7700.00 | Window Closed / Lapsed |