Patent US3154840A successfully refreshed from Google Patents.
US3154840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a magnetic memory
Assignee: RCA Corp
•
Filing: 1960-06-06
•
Granted: 1964-11-03
•
Expires: 1980-06-06
Abstract
No abstract record available.
Inventors
- 👤 Shahbender Rabah
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:12
CPC Classifications
G; G11; G11C; G11C5/00; G11C5/02; G11C5/04; G11C11/00; G11C11/02; G11C11/14; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49069
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
176 words
A METHOD OF MAKING A MAGNETIC MEMORY COMPRISING THE STEPS OF APPLYING TO ONE SURFACE OF A FIRST SHEET OF INSULATOR MATERIAL WHICH IS FORMED WITH APERTURES THROUGH THE SHEET, A PLURALITY OF LEADS, EACH LEAD LYING ON AN AREA OF THE SHEET LOCATED BETWEEN AN ADJACENT PAIR OF APERTURES AND EXTENDING IN A DIRECTION AT A SUBSTANTIAL ANGLE TO AN IMAGINARY LINE JOINING THE CENTERS OF SAID PAIR OF APERTURES SO THAT THE LEADS BYPASS AND DO NOT INTERSECT THE APERTURES; PLACING A SECOND SHEET OF INSULATOR MATERIAL SIMILAR TO THE FIRST ON SAID ONE SURFACE OF THE FIRST SHEET WITH THE APERTURES IN THE TWO SHEETS ALIGNED; SEALING THE TWO SHEETS TOGETHER; AND APPLYING A FILM OF MAGNETIC MATERIAL OF THE TYPE WHICH IS CAPABLE OF ASSUMING TWO REMANENT STATES OVER BOTH EXPOSED SURFACES OF INSULATOR MATERIAL AND THE WALLS OF THE ALIGNED APERTURES SO AS TO FORM A PLURALITY OF MAGNETIC ELEMENTS, EACH OF TUBULAR CROSS SECTION, AND EACH PASSING THROUGH A PAIR OF APERTURES AND SURROUNDING AT LEAST ONE OF THE LEADS.
Claim 2
Independent Claim
176 words
A METHOD OF MAKING A MAGNETIC MEMORY COMPRISING THE STEPS OF APPLYING TO ONE SURFACE OF A FIRST SHEET OF INSULATOR MATERIAL WHICH IS FORMED WITH APERTURES THROUGH THE SHEET, A PLURALITY OF LEADS, EACH LEAD LYING ON AN AREA OF THE SHEET LOCATED BETWEEN AN ADJACENT PAIR OF APERTURES AND EXTENDING IN A DIRECTION AT A SUBSTANTIAL ANGLE TO AN IMAGINARY LINE JOINING THE CENTERS OF SAID PAIR OF APERTURES SO THAT THE LEADS BYPASS AND DO NOT INTERSECT THE APERTURES; PLACING A SECOND SHEET OF INSULATOR MATERIAL SIMILAR TO THE FIRST ON SAID ONE SURFACE OF THE FIRST SHEET WITH THE APERTURES IN THE TWO SHEETS ALIGNED; SEALING THE TWO SHEETS TOGETHER; AND APPLYING A FILM OF MAGNETIC MATERIAL OF THE TYPE WHICH IS CAPABLE OF ASSUMING TWO REMANENT STATES OVER BOTH EXPOSED SURFACES OF INSULATOR MATERIAL AND THE WALLS OF THE ALIGNED APERTURES SO AS TO FORM A PLURALITY OF MAGNETIC ELEMENTS, EACH OF TUBULAR CROSS SECTION, AND EACH PASSING THROUGH A PAIR OF APERTURES AND SURROUNDING AT LEAST ONE OF THE LEADS.
References Cited (Backward Citations)
US2784391A
Cited
US2988668A
Cited
US2981932A
Cited
US2961745A
Cited
US2937351A
Cited
US2878463A
Cited
US2877540A
Cited
US2876393A
Cited
US3138785A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-11-03 | 1968-05-04 | 1968-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-03 | 1972-05-04 | 1972-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-03 | 1976-05-04 | 1976-11-03 | $7700.00 | Window Closed / Lapsed |