Patent US3274111A successfully refreshed from Google Patents.
US3274111A
Expired / Lapsed
US
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Magnetic recording medium with self-contained lubricant
Assignee: Sony Corp
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Filing: 1963-09-05
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Granted: 1966-09-20
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Expires: 1983-09-05
Abstract
No abstract record available.
Inventors
- 👤 Sada Tomohiko
- 👤 Nishida Minoru
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:26
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/62; G11B5/68; G11B5/70; G11B5/71; Y; Y10; Y10S; Y10S428/00; Y10S428/90; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31609
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
A MAGNETIC COMPOSITION FOR USE IN MAGNETIC RECORDING MEDIA, SAID COMPOSITION CONSISTING ESSENTIALLY OF A POWDERED MAGNETIC MATERIAL AND A BINDER TOGETHER WITH FROM ABOUT 0.1 TO ABOUT 20 PARTS PER 100 PARTS OF MAGNETIC MATERIAL OF A FATTY ACID ESTER PRODUCED FROM A MONOHYDROXY ALCOHOL CONTAINING FROM 3 TO 12 CARBON ATOMS AND AT LEAST ONE SATURATED MONOBASIC FATTY ACID CONTAINING FROM 12 TO 16 CARBON ATOMS.
Claim 2
Dependent Claim
68 words
A MAGNETIC COMPOSITION FOR USE IN MAGNETIC RECORDING MEDIA, SAID COMPOSITION CONSISTING ESSENTIALLY OF A POWDERED MAGNETIC MATERIAL AND A BINDER TOGETHER WITH FROM ABOUT 0.1 TO ABOUT 20 PARTS PER 100 PARTS OF MAGNETIC MATERIAL OF A FATTY ACID ESTER PRODUCED FROM A MONOHYDROXY ALCOHOL CONTAINING FROM 3 TO 12 CARBON ATOMS AND AT LEAST ONE SATURATED MONOBASIC FATTY ACID CONTAINING FROM 12 TO 16 CARBON ATOMS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-19 | 1970-03-21 | 1970-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-19 | 1974-03-21 | 1974-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-19 | 1978-03-21 | 1978-09-20 | $7700.00 | Window Closed / Lapsed |