US3154769A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Helical wrap memory
Assignee: Unisys Corp
•
Filing: 1962-11-07
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Granted: 1964-10-27
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Expires: 1982-11-07
Abstract
No abstract record available.
Inventors
- 👤 John D Blades
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:35
CPC Classifications
G; G11; G11C; G11C11/00; G11C11/02; G11C11/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
IN A BINARY DATA STORAGE DEVICE; FIRST CONDUCTORS; SECOND CONDUCTORS SUBSTANTIALLY AT RIGHT ANGLES TO SAID FIRST CONDUCTORS AND PASSING BETWEEN ALTERNATE FIRST CONDUCTORS; AND STRIPS OF FERROMAGNETIC MATERIAL WRAPPED WITH THIRD CONDUCTORS AND HAVING A PREFERRED DIRECTION OF MAGNETIZATION SUBSTANTIALLY PARALLEL TO THEIR LONGEST DIMENSION LOCATED BETWEEN SAID FIRST CONDUCTORS AND SAID
Claim 2
Dependent Claim
53 words
IN A BINARY DATA STORAGE DEVICE; FIRST CONDUCTORS; SECOND CONDUCTORS SUBSTANTIALLY AT RIGHT ANGLES TO SAID FIRST CONDUCTORS AND PASSING BETWEEN ALTERNATE FIRST CONDUCTORS; AND STRIPS OF FERROMAGNETIC MATERIAL WRAPPED WITH THIRD CONDUCTORS AND HAVING A PREFERRED DIRECTION OF MAGNETIZATION SUBSTANTIALLY PARALLEL TO THEIR LONGEST DIMENSION LOCATED BETWEEN SAID FIRST CONDUCTORS AND SAID
References Cited (Backward Citations)
US3083353A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-10-27 | 1968-04-27 | 1968-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-27 | 1972-04-27 | 1972-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-27 | 1976-04-27 | 1976-10-27 | $7700.00 | Window Closed / Lapsed |