Long film
US10557004B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 3, 2017 |
| Grant date | Feb 11, 2020 |
| Priority date | — |
| Expiry date | Mar 9, 2037 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24612
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A long-length film including a plurality of knurl portions shaped by continuous linear concavo-convex portions on at least one surface thereof, wherein the plurality of knurl portions are aligned in a lengthwise direction of the long-length film, a planar shape of the knurl portion seen from a thickness direction of the long-length film includes: 10 or more corners having a curvature radius of 0.3 mm or less and an angle of 100° or less or a curvature radius of 0.2 mm or less and an angle of 120° or less, per one planar shape of the knurl portion; and 18 or more straight portions having a straight shape, per one planar shape of the knurl portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.