Patent US3215819A successfully refreshed from Google Patents.
US3215819A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Memory system
Assignee: International Business Machines Corp
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Filing: 1961-05-29
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Granted: 1965-11-02
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Expires: 1981-05-29
Abstract
No abstract record available.
Inventors
- 👤 William V Smith
- 👤 Harold E Petersen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:04
CPC Classifications
G; G11; G11C; G11C11/00; G11C11/21; G11C11/42
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
114 words
A DATA MEMORY COMPRISING IN COMBINATION A PLURALITY OF LIGHT PRODUCING DEVICES A MATRIX OF ELECTRICAL CONNECTIONS TO SAID LIGHT PRODUCING DEVICES, SAID MATRIX COMPRISING TWO SETS OF PANEL DRIVE LINES CONNECTED TO SAID LIGHT PRODUCING DEVICES MAY WHEREBY ANY ONE OF SAID LIGHT PRODUCING DEVICES MAY BE ACTIVATED BY APPLYING A VOLTAGE BETWEEN A SELECTED LINE IN THE FIRST SET AND A SELECTED LINE IN THE SECOND SET OF DRIVE LINES A PLURALITY OF PHOTORESISTOR MATRIX SUBASSEMBLIES ONE ADJACENT TO EACH OF SAID LIGHT PRODUCING DEVICES, EACH OF SAID PHOTORESISTORS MATRIX SUBASSEMBLIES COMPRISING A SET OF HORIZONTAL MATRIX LINES A SET OF VERTICAL MATRIX LINES, AND A PHOTORESISTIVE CONNECTION BETWEEN EACH LINE IN
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) | 1968-11-01 | 1969-05-03 | 1969-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-01 | 1973-05-03 | 1973-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-01 | 1977-05-03 | 1977-11-02 | $7700.00 | Window Closed / Lapsed |