US3215992A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coincident current permanent memory with preselected inhibits
Assignee: Indiana General Corp
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Filing: 1961-03-20
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Granted: 1965-11-02
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Expires: 1981-03-20
Abstract
No abstract record available.
Inventors
- 👤 James W Schallerer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:50
CPC Classifications
G; G11; G11C; G11C17/00; G11C17/02; G06; G06F; G06F9/00; G06F9/06; G06F9/44; G06F9/448; G06F9/4482; G06F9/4484
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
A FIXED PROGRAM MEMORY PLANE COMPRISING A MATRIX OF MAGNETIC ELEMENTS ARRANGED IN ROWS AND COLUMNS, CIRCUIT MEANS FOR SELECTIVELY ADDRESSING EACH OF SAID ELEMENTS WITH COINCIDENT CURRENT PULSES CAPABLE OF SWITCHING THE MAGNETIC STATES OF THE CORRESPONDING ELEMENTS, MEANS FOR MAINTAINING EACH OF A PLURALITY OF PREDETERMINED ELEMENTS OF SAID MATRIX ON A PARTICULAR ONE OF ITS TWO MAGNETIC STATES COMPRISING A WINDING COUPLED WITH SAID PREDETERMINED ELEMENTS TO BE MAINTAINED IN A PARTICULAR MAGNETIC STATE, AND MEANS FOR IMPRESSING CURRENT PULSES THROUGH SAID WINDING TO SELECTIVELY PREVENT THE SWITCHING CAPABILITY OF SAID COINCIDENT CURRENT PULSES WHEN ADDRESSED TO SAID PREDETERMINED ELEMENTS, SAID WINDING BEING EFFECTIVELY UNTHREADED WITH THE REMAINING ELEMENTS OF SAID MATRIX.
Claim 2
Dependent Claim
115 words
A FIXED PROGRAM MEMORY PLANE COMPRISING A MATRIX OF MAGNETIC ELEMENTS ARRANGED IN ROWS AND COLUMNS, CIRCUIT MEANS FOR SELECTIVELY ADDRESSING EACH OF SAID ELEMENTS WITH COINCIDENT CURRENT PULSES CAPABLE OF SWITCHING THE MAGNETIC STATES OF THE CORRESPONDING ELEMENTS, MEANS FOR MAINTAINING EACH OF A PLURALITY OF PREDETERMINED ELEMENTS OF SAID MATRIX ON A PARTICULAR ONE OF ITS TWO MAGNETIC STATES COMPRISING A WINDING COUPLED WITH SAID PREDETERMINED ELEMENTS TO BE MAINTAINED IN A PARTICULAR MAGNETIC STATE, AND MEANS FOR IMPRESSING CURRENT PULSES THROUGH SAID WINDING TO SELECTIVELY PREVENT THE SWITCHING CAPABILITY OF SAID COINCIDENT CURRENT PULSES WHEN ADDRESSED TO SAID PREDETERMINED ELEMENTS, SAID WINDING BEING EFFECTIVELY UNTHREADED WITH THE REMAINING ELEMENTS OF SAID MATRIX.
References Cited (Backward Citations)
GB842928A
Cited
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 |