US3428953A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Card capacitor storage selection system
Assignee: International Business Machines Corp
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Filing: 1965-07-14
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Granted: 1969-02-18
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Expires: 1985-07-14
Abstract
No abstract record available.
Inventors
- 👤 Duane W Baxter
- 👤 Bruce C Felton
- 👤 Harold W Hill
- 👤 Harry S Hoffman Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 02:25
CPC Classifications
G; G11; G11C; G11C17/00; G11C17/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
168 words
A THREE DIMENSIONAL SELECTION SYSTEM FOR A CARD CAPACITOR MEMORY COMPRISING IN COMBINATION A PLURALITY OF CARDS DISPOSED IN GROUPS OF DECKS, EACH OF SAID DECKS COMPRISING A PLURALITY OF STACKED CARDS, EACH OF SAID CARDS HAVING SPACED INTERSECTING DRIVE AND SENSE LINES THEREON, MEANS FOR SELECTIVELY PROVIDING CAPACITIVE COUPLING BETWEEN SAID DRIVE AND SENSE LINES AT THE INTERSECTIONS THEREOF, SAID MEANS COMPRISING A METALLIZED DATA CARD HAVING DATA MANIFESTING PERFORATIONS THEREIN, THE PATTERN OF SAID DATA CARD FORMING A PLURALITY OF COUPLING CAPACITORS AT THE SAID SELECTED INTERSECTIONS, MEANS FOR SELECTIVELY READING A WORD FROM SAID MEMORY MEANS, SAID MEANS BEING RESPONSIVE TO DECODED ADDRESS SIGNALS REPRESENTATIVE OF A SELECTED DECK AND ROW TO CHARGE CAPACITORS ASSOCIATED WITH THE SELECTED ROW AND DECK, MEANS RESPONSIVE TO DECODED ADDRESS SIGNALS REPRESENTATIVE OF THE CARD ADDRESS TO DISCHARGE THOSE CHARGED CAPACITORS IN THE SELECTED CARD, A PLURALITY OF SENSE AMPLIFIERS, AND MEANS FOR COUPLING THE RESULTING SIGNALS TO SAID SENSE AMPLIFIERS TO REPRESENT THE INFORMATION STORED IN SAID ADDRESS.
Claim 2
Dependent Claim
168 words
A THREE DIMENSIONAL SELECTION SYSTEM FOR A CARD CAPACITOR MEMORY COMPRISING IN COMBINATION A PLURALITY OF CARDS DISPOSED IN GROUPS OF DECKS, EACH OF SAID DECKS COMPRISING A PLURALITY OF STACKED CARDS, EACH OF SAID CARDS HAVING SPACED INTERSECTING DRIVE AND SENSE LINES THEREON, MEANS FOR SELECTIVELY PROVIDING CAPACITIVE COUPLING BETWEEN SAID DRIVE AND SENSE LINES AT THE INTERSECTIONS THEREOF, SAID MEANS COMPRISING A METALLIZED DATA CARD HAVING DATA MANIFESTING PERFORATIONS THEREIN, THE PATTERN OF SAID DATA CARD FORMING A PLURALITY OF COUPLING CAPACITORS AT THE SAID SELECTED INTERSECTIONS, MEANS FOR SELECTIVELY READING A WORD FROM SAID MEMORY MEANS, SAID MEANS BEING RESPONSIVE TO DECODED ADDRESS SIGNALS REPRESENTATIVE OF A SELECTED DECK AND ROW TO CHARGE CAPACITORS ASSOCIATED WITH THE SELECTED ROW AND DECK, MEANS RESPONSIVE TO DECODED ADDRESS SIGNALS REPRESENTATIVE OF THE CARD ADDRESS TO DISCHARGE THOSE CHARGED CAPACITORS IN THE SELECTED CARD, A PLURALITY OF SENSE AMPLIFIERS, AND MEANS FOR COUPLING THE RESULTING SIGNALS TO SAID SENSE AMPLIFIERS TO REPRESENT THE INFORMATION STORED IN SAID ADDRESS.
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) | 1972-02-18 | 1972-08-19 | 1973-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-18 | 1976-08-19 | 1977-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-18 | 1980-08-19 | 1981-02-18 | $7700.00 | Window Closed / Lapsed |