US3047429A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic recording medium comprising coatings of ferrite particles of the molar composite amno.bzno.cfe2o3
Assignee: RCA Corp
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Filing: 1959-03-27
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Granted: 1962-07-31
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Expires: 1979-03-27
Abstract
No abstract record available.
Inventors
- 👤 Arthur I Stoller
- 👤 Gordon Irwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:56
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/62; G11B5/68; G11B5/70; G11B5/706; G11B5/70626; G11B5/70642; G11B5/70678; Y; Y10; Y10S; Y10S428/00; Y10S428/90; Y10T; Y10T428/00; Y10T428/25; Y10T428/256; Y10T428/257; Y10T428/31504; Y10T428/31971; Y10T428/31975; Y10T428/31978; Y10T428/31986
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
35 words
A MAGNETIC RECORDING MEDIUM COMPRISING A SUPPORT AND A MAGNETIC COATING ON SAID SUPPORT; SAID COATING COMPRISING FERRITE PARTICLES IN A BINDER; SAID FERRITE PARTICLES HAVING A SPINEL TYPE CRYSTAL STRUCTURE AND THE MOLAR COMPOSITION;
Claim 2
Dependent Claim
35 words
A MAGNETIC RECORDING MEDIUM COMPRISING A SUPPORT AND A MAGNETIC COATING ON SAID SUPPORT; SAID COATING COMPRISING FERRITE PARTICLES IN A BINDER; SAID FERRITE PARTICLES HAVING A SPINEL TYPE CRYSTAL STRUCTURE AND THE MOLAR COMPOSITION;
References Cited (Backward Citations)
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Cited
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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) | 1965-07-30 | 1966-01-29 | 1966-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-30 | 1970-01-29 | 1970-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-30 | 1974-01-29 | 1974-07-31 | $7700.00 | Window Closed / Lapsed |