Recording disks
US4680211A · kind A · utility
12Cited by
4References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 25, 1985 |
| Grant date | Jul 14, 1987 |
| Priority date | — |
| Expiry date | Jul 25, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/2534
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A recording disk for either optical or magnetic recording having improved dimensional stability as a result of reduced water absorption comprising a copolymer of a vinyl aromatic monomer and alphamethylstyrene prepared by anionic polymerization at a temperature above 61.degree. C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.