Patent US3325632A successfully refreshed from Google Patents.
US3325632A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Data storage techniques
Assignee: GTE Sylvania Inc
•
Filing: 1961-07-12
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Granted: 1967-06-13
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Expires: 1981-07-12
Abstract
No abstract record available.
Inventors
- 👤 Donald L Lilly
- 👤 Michael E Mikrut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:57
CPC Classifications
G; G11; G11B; G11B20/00; G11B20/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
A RECORD OF PERMANENTLY STORED MAGNETICALLY SENSIBLE BINARY CODED DATA AND CAPABLE OF BEARING MANREADABLE INFORMATION WHICH IS NOT OBLITERATED BY THE CODED DATA, SAID RECORD COMPRISING, A LAYER OF NONMAGNETIC MATERIAL HAVING FORMED ON ONE SURFACE THEREOF A UNIFORM COATING OF MAGNETIZABLE MATERIAL, AND A PLURALITY OF NONCONTIGUOUS AREAS IN THE EXPOSED SURFACE OF SAID COATING IN A PATTERN REPRESENTATIVE OF STORED BINARY DATA, EACH OF SAID NONCONTIGUOUS AREAS BEING A DEPRESSION OF SUBSTANTIALLY UNIFORM DEPTH IN SAID MAGNETIZABLE MATERIAL EXTENDING INTO BUT NOT THROUGH SAID NONMAGNETIC
Claim 2
Dependent Claim
88 words
A RECORD OF PERMANENTLY STORED MAGNETICALLY SENSIBLE BINARY CODED DATA AND CAPABLE OF BEARING MANREADABLE INFORMATION WHICH IS NOT OBLITERATED BY THE CODED DATA, SAID RECORD COMPRISING, A LAYER OF NONMAGNETIC MATERIAL HAVING FORMED ON ONE SURFACE THEREOF A UNIFORM COATING OF MAGNETIZABLE MATERIAL, AND A PLURALITY OF NONCONTIGUOUS AREAS IN THE EXPOSED SURFACE OF SAID COATING IN A PATTERN REPRESENTATIVE OF STORED BINARY DATA, EACH OF SAID NONCONTIGUOUS AREAS BEING A DEPRESSION OF SUBSTANTIALLY UNIFORM DEPTH IN SAID MAGNETIZABLE MATERIAL EXTENDING INTO BUT NOT THROUGH SAID NONMAGNETIC
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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) | 1970-06-12 | 1970-12-12 | 1971-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-12 | 1974-12-12 | 1975-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-12 | 1978-12-12 | 1979-06-13 | $7700.00 | Window Closed / Lapsed |