US3319232A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Memory systems and devices
Assignee: Control Data Corp
•
Filing: 1962-01-05
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Granted: 1967-05-09
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Expires: 1982-01-05
Abstract
No abstract record available.
Inventors
- 👤 Joseph W Crownover
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:13
CPC Classifications
G; G11; G11C; G11C11/00; G11C11/02; G11C11/06; G11C11/06085; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49069; Y10T29/496
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
A DWEVICE FOR MAGNETICALLY REPRESENTING DIGITAL INFORMATION COMPRISING: A SLAB OF MAGNETIC MATERIAL HAVING SUBSTANTIALLY PARALLEL FIRST AND SECOND PLANAR SURFACES AND HAVING THE CHARACTERISTIC OF BEING SUBSTANTIALLY MAGNETICALLY SATURATED AT REMANENCE, SAID SLAB HAVING A FIRST SET OF SUBSTANTIALLY PARALLEL GROOVES IN SAID FIRST SURFACE OF SAID SLAB IN A FIRST DIRECTION, SAID SLAB HAVING A SECOND SET OF SUBSTANTIALLY PARALLEL GROOVES IN SAID SECOND SURFACE IN A SECOND DIRECTION THAT IS SUBSTANTIALLY PERPENDICULAR TO SAID FIRST DIRECTION, THE SUM OF THE DEPTHS OF SAID FIRST AND SECOND GROOVES, AS MEASURED PERPENDICULARLY TO SAID PARALLEL SURFACES, BEING GREATER THAN THE THICKNESS OF SAID SLAB, WHEREBY APERTURES EXIST AT EACH OF THE INTERSECTIONS OF SAID GROOVES, EACH OF SAID GROOVES HAVING A WIDTH THAT IS GREATER THAN THE SPACING BETWEEN ADJACENT ONES OF SAID GROOVES IN THE SAME SURFACE, WHEREBY THERE EXIST EFFECTIVE TUN-
Claim 2
Dependent Claim
144 words
A DWEVICE FOR MAGNETICALLY REPRESENTING DIGITAL INFORMATION COMPRISING: A SLAB OF MAGNETIC MATERIAL HAVING SUBSTANTIALLY PARALLEL FIRST AND SECOND PLANAR SURFACES AND HAVING THE CHARACTERISTIC OF BEING SUBSTANTIALLY MAGNETICALLY SATURATED AT REMANENCE, SAID SLAB HAVING A FIRST SET OF SUBSTANTIALLY PARALLEL GROOVES IN SAID FIRST SURFACE OF SAID SLAB IN A FIRST DIRECTION, SAID SLAB HAVING A SECOND SET OF SUBSTANTIALLY PARALLEL GROOVES IN SAID SECOND SURFACE IN A SECOND DIRECTION THAT IS SUBSTANTIALLY PERPENDICULAR TO SAID FIRST DIRECTION, THE SUM OF THE DEPTHS OF SAID FIRST AND SECOND GROOVES, AS MEASURED PERPENDICULARLY TO SAID PARALLEL SURFACES, BEING GREATER THAN THE THICKNESS OF SAID SLAB, WHEREBY APERTURES EXIST AT EACH OF THE INTERSECTIONS OF SAID GROOVES, EACH OF SAID GROOVES HAVING A WIDTH THAT IS GREATER THAN THE SPACING BETWEEN ADJACENT ONES OF SAID GROOVES IN THE SAME SURFACE, WHEREBY THERE EXIST EFFECTIVE TUN-
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-05-08 | 1970-11-07 | 1971-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-08 | 1974-11-07 | 1975-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-08 | 1978-11-07 | 1979-05-09 | $7700.00 | Window Closed / Lapsed |