US3262812A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic recording tape with magnetic layer of oxide coated iron-cobalt alloy particles in a binder
Assignee: General Electric Co
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Filing: 1964-03-26
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Granted: 1966-07-26
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Expires: 1984-03-26
Abstract
No abstract record available.
Inventors
- 👤 Richard B Falk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:15
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/62; G11B5/68; G11B5/70; G11B5/706; G11B5/70605; G11B5/70615; G11B5/712; Y; Y10; Y10S; Y10S428/00; Y10S428/90; Y10T; Y10T428/00; Y10T428/25; Y10T428/256; Y10T428/257
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
A MAGNETIC RECORDING MEDIUM COMPRISING A NONMAGNETIC SUPPORT AND ELECTROPOSITED, FINE MAGNETIC PARTICLES SUPPORTED THEREON, EACH OF THE PARTICLES CONSISTING ESSENTIALLY OF A FERROMAGNETIC CORE OF AN ALLOY OF IRON AND COBALT AND A FERRIMAGNETIC COATING SURROUNDING SAID CORE OF AN OXIDE OF IRON AND COBALT, THE PARTICLES HAVING FROM 10 TO 80 PERCENT COBALT BASED UPON THE COMBINED WEIGHT OF IRON AND COBALT AND IN EXCESS OF ONE PERCENT OXYGEN BASED UPON THE TOTAL WEIGHT OF THE PARTICLES, THE AVERAGE DIAMETER OF SAID PARTICLES BEING LESS THAN 1000 ANGSTROMS.
Claim 2
Dependent Claim
90 words
A MAGNETIC RECORDING MEDIUM COMPRISING A NONMAGNETIC SUPPORT AND ELECTROPOSITED, FINE MAGNETIC PARTICLES SUPPORTED THEREON, EACH OF THE PARTICLES CONSISTING ESSENTIALLY OF A FERROMAGNETIC CORE OF AN ALLOY OF IRON AND COBALT AND A FERRIMAGNETIC COATING SURROUNDING SAID CORE OF AN OXIDE OF IRON AND COBALT, THE PARTICLES HAVING FROM 10 TO 80 PERCENT COBALT BASED UPON THE COMBINED WEIGHT OF IRON AND COBALT AND IN EXCESS OF ONE PERCENT OXYGEN BASED UPON THE TOTAL WEIGHT OF THE PARTICLES, THE AVERAGE DIAMETER OF SAID PARTICLES BEING LESS THAN 1000 ANGSTROMS.
References Cited (Backward Citations)
US2480156A
Cited
US2481079A
Cited
GB761451A
Cited
US2974104A
Cited
US2941901A
Cited
US2988466A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-25 | 1970-01-24 | 1970-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-25 | 1974-01-24 | 1974-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-25 | 1978-01-24 | 1978-07-26 | $7700.00 | Window Closed / Lapsed |