Magnetic recording medium
US4741954A · kind A · utility
5Cited by
9References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 19, 1985 |
| Grant date | May 3, 1988 |
| Priority date | — |
| Expiry date | Jun 19, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/257
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic recording medium comprising a non-magnetic substrate, a magnetic recording layer formed on one side of the substrate and a back coating layer formed on the other side of the substrate, wherein the back coating layer contains an inorganic pigment having a Mohs hardness of at least 5 and carbon black, and the inorganic pigment is in an amount of at most 1/9 by weight relative to the carbon black.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.