US3178580A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for producing radiation induced electroluminescence
Assignee: International Business Machines Corp
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Filing: 1959-07-02
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Granted: 1965-04-13
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Expires: 1979-07-02
Abstract
No abstract record available.
Inventors
- 👤 Marcel J Vogel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:06
CPC Classifications
H; H05; H05B; H05B33/00; H05B33/12; H05B33/14; H05B33/145; H05B33/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
108 words
A LATCH CIRCUIT COMPRISING: A D.C. ELECTROLUMINESCENT PHOSPHOR LAYER; A PHOTOCONDUCTIVE LAYER DISPOSED IN ELECTRICAL CONTACT WITH SAID PHOSPHOR LAYER; MEANS FOR SUPPLYING A D.C. VOLTAGE, ACROSS SAID PHOSPHOR LAYER AND SAID PHOTOCONDUCTIVE LAYER, INEFFECTIVE FOR CAUSING RADIATION FROM THE PHOSPHOR LAYER SURFICIENT TO REDUCE THE IMPEDANCE OF THE PHOTOCONDUCTIVE LAYER TO CLOSE SAID CIRCUIT; AND ACTUATING MEANS OPERABLE FOR A PERIOD OF TIME FOR REDUCING THE IMPEDANCE OF SAID PHOTOCONDUCTIVE LAYER SO THAT THE RADIATION FROM SAID PHOTOPHOSE LAYER IS SUFFICIENT TO MAINTAIN THE IMPEDANCE OF THE PHOTOCONDUCTIVE LAYER REDUCED AFTER SAID PERIOD OF TIME, THEREBY CLOSING SAID CIRCUIT AND PLACING THE CIRCUIT IS A LATCHED CONDITION.
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) | 1968-04-12 | 1968-10-12 | 1969-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-12 | 1972-10-12 | 1973-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-12 | 1976-10-12 | 1977-04-13 | $7700.00 | Window Closed / Lapsed |