US3138785A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Deposited magnetic memory array
Assignee: International Business Machines Corp
•
Filing: 1959-05-21
•
Granted: 1964-06-23
•
Expires: 1979-05-21
Abstract
No abstract record available.
Inventors
- 👤 Edward B Chapman
- 👤 Kenneth F Greene
- 👤 Bruno J Ronkese
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:35
CPC Classifications
H; H05; H05K; H05K1/00; H05K1/16; H05K1/165; G; G11; G11C; G11C11/00; G11C11/02; G11C11/06; H05K2201/00; H05K2201/08; H05K2201/083; H05K2201/086; H05K2201/09; H05K2201/09009; H05K2201/09063; H05K2203/00; H05K2203/07; H05K2203/0703; H05K2203/0723; H05K3/00; H05K3/10; H05K3/14; H05K3/146; H05K3/40; H05K3/403; H05K3/4038; H05K3/4076
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A MAGNETIC STORAGE MATRIX COMPRISING: A FLAT NONCONDUCTIVE SUBSTRATE WITH A GRID OF SEPARATE MEMORY AREAS FORMED BY ROWS AND COLUMNS OF CLOSELY SPACED PAIRS OF SLOT OPENINGS, THERE BEING BETWEEN EACH PAIR OF OPENINGS A SEPARATE MEMORY AREA STRIP RECEPTIVE TO CYLINDRICAL DEPOSITS, A PLURALITY OF SETS OF PRINTED CONDUCTORS ON SAID SUBSTRATE WITH CONDUCTORS OF DIFFERENT SETS GROUPED OVER EACH OF SAID STRIPS IN A MEMORY AREA, AND CYLINDRICAL THIN FILMS OF MAGNETIC MATERIAL DEPOSITED ON SAID SEPARATE STRIPS OVER SAID CONDUCTORS AS SEPARATE MEMORY ELEMENTS, SAID MATERIAL BEING OF A NATURE EXHIBITING SQUARE LOOP HYSTERESIS CHARACTERISTICS.
Claim 2
Dependent Claim
99 words
A MAGNETIC STORAGE MATRIX COMPRISING: A FLAT NONCONDUCTIVE SUBSTRATE WITH A GRID OF SEPARATE MEMORY AREAS FORMED BY ROWS AND COLUMNS OF CLOSELY SPACED PAIRS OF SLOT OPENINGS, THERE BEING BETWEEN EACH PAIR OF OPENINGS A SEPARATE MEMORY AREA STRIP RECEPTIVE TO CYLINDRICAL DEPOSITS, A PLURALITY OF SETS OF PRINTED CONDUCTORS ON SAID SUBSTRATE WITH CONDUCTORS OF DIFFERENT SETS GROUPED OVER EACH OF SAID STRIPS IN A MEMORY AREA, AND CYLINDRICAL THIN FILMS OF MAGNETIC MATERIAL DEPOSITED ON SAID SEPARATE STRIPS OVER SAID CONDUCTORS AS SEPARATE MEMORY ELEMENTS, SAID MATERIAL BEING OF A NATURE EXHIBITING SQUARE LOOP HYSTERESIS CHARACTERISTICS.
References Cited (Backward Citations)
US2734150A
Cited
US2683839A
Cited
US2671950A
Cited
US2792563A
Cited
US2907988A
Cited
US2970296A
Cited
US2901736A
Cited
AT199908B
Cited
US2878463A
Cited
US2877540A
Cited
US2882519A
Cited
FR1190683A
Cited
US3030612A
Cited
GB868775A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-23 | 1967-12-23 | 1968-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-23 | 1971-12-23 | 1972-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-23 | 1975-12-23 | 1976-06-23 | $7700.00 | Window Closed / Lapsed |