US3704152A
Expired / Lapsed
US
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Magnetic recording media
Assignee: BASF SE
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Filing: 1970-09-10
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Granted: 1972-11-28
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Expires: 1990-09-10
Abstract
Abstract MAGNETIC RECORDING MEDIA COMPRISING A NON-MAGNETIC SUPPORT AND A MAGNETIC LAYER BASED ON A MAGNETIC PIGMENT DISPERSED IN A BINDER AND CONTAINING A SMALL AMOUNT OF A LIQUID MIXTURE OF BRANCHED FATTY ACIDS HAVING AT LEAST 95% BY WEIGHT OF C12 TO C18 FATTY ACIDS AND AT LEAST 40% BY WEIGHT OF BRANCHED C18 FATTY ACIDS.
Inventors
- 👤 Hans Joerg Hartmann
- 👤 Georg Schnell
- 👤 Gerhard Werst
- 👤 Horst Grosselfinger
- 👤 Job-Werner Hartmann
- 👤 Hansjoerg Bipp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:25
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/62; G11B5/68; G11B5/70; G11B5/71; G11B5/702; G11B5/7023; Y; Y10; Y10S; Y10S428/00; Y10S428/90; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31786; Y10T428/31797
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-11-28 | 1976-05-29 | 1976-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-28 | 1980-05-29 | 1980-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-28 | 1984-05-29 | 1984-11-28 | $7700.00 | Window Closed / Lapsed |