US3223983A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Retentive data store and material
Assignee: Unisys Corp
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Filing: 1958-09-25
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Granted: 1965-12-14
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Expires: 1978-09-25
Abstract
No abstract record available.
Inventors
- 👤 Wilbur G Hespenheide
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:05
CPC Classifications
G; G11; G11C; G11C11/00; G11C11/02; G11C11/04; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49069; Y10T29/49073
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
A STORAGE DEVICE COMPRISING A CENTRAL CONDUCTOR COATED WITH A FERROMAGNETIC MATERIAL HAVING AN AXIS OF PREFERRED MAGNETIZATION HELICAL ABOUT THE AXIS OF SAID CENTRAL CONDUCTOR, MEANS FOR PRODUCING A FIRST MAGNETIZING FIELD PARALLEL TO THE AXIS OF SAID CENTRAL CONDUCTOR WHEREBY SAID FERROMAGNETIC COATINGIS MAGNETIZED IN EITHER OF TWO DIRECTIONS ALONG SAID AXIS OF PREFERRED MAGNETIZATION, MEANS INCLUDING A SOURCE OF CURRENT CONTROLLED TO PROVIDE NONDESTRUCTIVE INTERROGATION OF SAID DEVICE AND ADAPTED FOR PULSING SAID CENTRAL CONDUCTOR, THE FLOW OF CURRENT THROUGH SAID CENTRAL CONDUCTOR PRODUCING A SECOND MAGNETIZING FIELD WHICH DISTURBS BUT DOES NOT REVERSE THE DIRECTION OF MAGNETIZATION ESTABLISHED IN THE COATING OF SAID CENTRAL CONDUCTOR BY SAID FIRST MAGNETIZING FIELD.
Claim 2
Dependent Claim
114 words
A STORAGE DEVICE COMPRISING A CENTRAL CONDUCTOR COATED WITH A FERROMAGNETIC MATERIAL HAVING AN AXIS OF PREFERRED MAGNETIZATION HELICAL ABOUT THE AXIS OF SAID CENTRAL CONDUCTOR, MEANS FOR PRODUCING A FIRST MAGNETIZING FIELD PARALLEL TO THE AXIS OF SAID CENTRAL CONDUCTOR WHEREBY SAID FERROMAGNETIC COATINGIS MAGNETIZED IN EITHER OF TWO DIRECTIONS ALONG SAID AXIS OF PREFERRED MAGNETIZATION, MEANS INCLUDING A SOURCE OF CURRENT CONTROLLED TO PROVIDE NONDESTRUCTIVE INTERROGATION OF SAID DEVICE AND ADAPTED FOR PULSING SAID CENTRAL CONDUCTOR, THE FLOW OF CURRENT THROUGH SAID CENTRAL CONDUCTOR PRODUCING A SECOND MAGNETIZING FIELD WHICH DISTURBS BUT DOES NOT REVERSE THE DIRECTION OF MAGNETIZATION ESTABLISHED IN THE COATING OF SAID CENTRAL CONDUCTOR BY SAID FIRST MAGNETIZING FIELD.
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) | 1968-12-13 | 1969-06-14 | 1969-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-13 | 1973-06-14 | 1973-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-13 | 1977-06-14 | 1977-12-14 | $7700.00 | Window Closed / Lapsed |