Magnetic recording medium
US4701372A · kind A · utility
14Cited by
14References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 9, 1986 |
| Grant date | Oct 20, 1987 |
| Priority date | — |
| Expiry date | Sep 9, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31609
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic recording medium characterized by a magnetic layer comprising (A) magnetic fine particles of plate-like hexagonal ferrite having a particle size of 0.3 microns or less and an easily magnetizable axis in the direction vertical to the flat plate surface (B) a polyurethane resin having a metal sulfonate group and (C) one or more esters of C.sub.10 -C.sub.18 fatty acids with alcohols having not more than 15 carbon atoms.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.