Patent US3354342A successfully refreshed from Google Patents.
US3354342A
Expired / Lapsed
US
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Solid state sub-miniature display apparatus
Assignee: Unisys Corp
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Filing: 1964-02-24
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Granted: 1967-11-21
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Expires: 1984-02-24
Abstract
No abstract record available.
Inventors
- 👤 Frederick F Ohntrup
- 👤 Joseph L Mclaughlin
- 👤 Robert E Benn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:07
CPC Classifications
G; G09; G09G; G09G3/00; G09G3/04; G09G3/06; G09G3/12; G09G3/14; G09F; G09F9/00; G09F9/30; G09F9/33; H; H10; H10H; H10H20/00; H10H20/80
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
SEMICONDUCTOR ELECTROLUMINESCENT DISPLAY APPARATUS COMPRISING, (A) AN ARRAY OF ELECTRICAL CONDUCTORS ARRANGED IN A PATTERN CHARACTERISTIC OF INTELLIGENCE, (B) SAID CONDUCTORS HAVING AN OVERLAY OF A SEMICONDUCTOR MATERIAL OF ONE CONDUCTIVITY TYPE (N OR P), (C) AN OPPOSITE CONDUCTIVITY TYPE SEMICONDUCTOR MATERAIL (P OR N), FORMING A RECOMBINATION JUNCTION AT THE INTERFACE BETWEEN THE TWO CONDUCTIVITY TYPES, (D) A CONDUCTOR OVERLAY ON SAID MATERIAL PROVIDING A GOOD OHMIC CONTACT TO THE SECOND MENTIONED CONDUCTIVITY TYPE MATERIAL, (E) THE SURFACE OF SAID CONDUCTORS BEING LAPPED SMOOTH THEREBY REMOVING THE SHORTING OVERLAY MATERIAL AND EXPOSING THE RECOMBINATION JUNCTIONS AT EACH CONDUCTOR, AND (F) MEANS FOR APPLYING SUITABLE ELECTRICAL POTENTIALS BETWEEN SAID CONDUCTORS AND SAID OVERLAY MATERIAL EFFECTIVE TO CAUSE RECOMBINATION TO OCCUR IN SAID JUNCTIONS PRODUCING A VISIBLE PATTERN CHARACTERISTIC OF SAID INTELLIGENCE.
Claim 2
Dependent Claim
131 words
SEMICONDUCTOR ELECTROLUMINESCENT DISPLAY APPARATUS COMPRISING, (A) AN ARRAY OF ELECTRICAL CONDUCTORS ARRANGED IN A PATTERN CHARACTERISTIC OF INTELLIGENCE, (B) SAID CONDUCTORS HAVING AN OVERLAY OF A SEMICONDUCTOR MATERIAL OF ONE CONDUCTIVITY TYPE (N OR P), (C) AN OPPOSITE CONDUCTIVITY TYPE SEMICONDUCTOR MATERAIL (P OR N), FORMING A RECOMBINATION JUNCTION AT THE INTERFACE BETWEEN THE TWO CONDUCTIVITY TYPES, (D) A CONDUCTOR OVERLAY ON SAID MATERIAL PROVIDING A GOOD OHMIC CONTACT TO THE SECOND MENTIONED CONDUCTIVITY TYPE MATERIAL, (E) THE SURFACE OF SAID CONDUCTORS BEING LAPPED SMOOTH THEREBY REMOVING THE SHORTING OVERLAY MATERIAL AND EXPOSING THE RECOMBINATION JUNCTIONS AT EACH CONDUCTOR, AND (F) MEANS FOR APPLYING SUITABLE ELECTRICAL POTENTIALS BETWEEN SAID CONDUCTORS AND SAID OVERLAY MATERIAL EFFECTIVE TO CAUSE RECOMBINATION TO OCCUR IN SAID JUNCTIONS PRODUCING A VISIBLE PATTERN CHARACTERISTIC OF SAID INTELLIGENCE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-11-20 | 1971-05-22 | 1971-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-20 | 1975-05-22 | 1975-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-20 | 1979-05-22 | 1979-11-21 | $7700.00 | Window Closed / Lapsed |