US3284783A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic recording on a thin-film surface
Assignee: Unisys Corp
•
Filing: 1961-07-10
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Granted: 1966-11-08
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Expires: 1981-07-10
Abstract
No abstract record available.
Inventors
- 👤 William W Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:05
CPC Classifications
G; G11; G11C; G11C8/00; G11C8/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
A MAGNETIC STORAGE DEVICE INCLUDING A THIN-FERROMAGNETIC FILM OF RIBBON FORM EXHIBITING UNIAXIAL ANISOTROPY SUCH THAT IT HAS A PREFERRED AXIS OF REMANENT MAGNETIZATION ALIGNED ALONG THE WIDTH DIMENSION, CHARACTERIZED BY A PLURALITY OF CONTIGUOUS DISCRETE MAGNETICALLY SATURABLY AREAS ALONG THE LENGTH DIMENSION, EACH OF SAID DISCRETE AREAS INCLUDING A MAGNETIZATION VECTOR SELECTIVELY SETTABLE TO STABLE STATES IN OPPOSITE DIRECTIONS SUBSTANTIALLY PARALLEL TO SAID PREFERRED AXIS, AND CONDUCTING MEANS HAVING A PREDETERMINED VELOCITY OF PROPAGATION AND IN AN OPERATIVE RELATIONSHIP WITH SAID FILM FOR RECEIVING SIGNALS TO ONE END AND FOR PROPAGATING SAID SIGNALS TOWARD A TERMINATION END.
Claim 2
Dependent Claim
98 words
A MAGNETIC STORAGE DEVICE INCLUDING A THIN-FERROMAGNETIC FILM OF RIBBON FORM EXHIBITING UNIAXIAL ANISOTROPY SUCH THAT IT HAS A PREFERRED AXIS OF REMANENT MAGNETIZATION ALIGNED ALONG THE WIDTH DIMENSION, CHARACTERIZED BY A PLURALITY OF CONTIGUOUS DISCRETE MAGNETICALLY SATURABLY AREAS ALONG THE LENGTH DIMENSION, EACH OF SAID DISCRETE AREAS INCLUDING A MAGNETIZATION VECTOR SELECTIVELY SETTABLE TO STABLE STATES IN OPPOSITE DIRECTIONS SUBSTANTIALLY PARALLEL TO SAID PREFERRED AXIS, AND CONDUCTING MEANS HAVING A PREDETERMINED VELOCITY OF PROPAGATION AND IN AN OPERATIVE RELATIONSHIP WITH SAID FILM FOR RECEIVING SIGNALS TO ONE END AND FOR PROPAGATING SAID SIGNALS TOWARD A TERMINATION END.
References Cited (Backward Citations)
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US3212070A
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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) | 1969-11-07 | 1970-05-09 | 1970-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-07 | 1974-05-09 | 1974-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-07 | 1978-05-09 | 1978-11-08 | $7700.00 | Window Closed / Lapsed |