Polyester film and method of manufacture thereof
US4233352A · kind A · utility
31Cited by
3References
39Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 9, 1979 |
| Grant date | Nov 11, 1980 |
| Priority date | — |
| Expiry date | Jan 9, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31801
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A slippery and smooth-surfaced polyester film, at least one surface of which is covered with worm-like nodules, useful as a base film for high recording density magnetic tape.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.