Magnetic recording substance
US4132827A · kind A · utility
10Cited by
12References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 18, 1977 |
| Grant date | Jan 2, 1979 |
| Priority date | — |
| Expiry date | Jan 18, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/30
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a magnetic recording substance comprising a non-magnetic support and a magnetic recording layer provided on the support, carbon black having a surface area of at least 700 m.sup.2 /g and an oil absorption of at least 300 ml (DBP)/100 g is contained in the magnetic layer thereby lowering the surface electric resistance without deteriorating the characteristics of the magnetic recording layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.