Printed watermark
US10589556B2 · kind B2 · utility
3Cited by
0References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 11, 2016 |
| Grant date | Mar 17, 2020 |
| Priority date | — |
| Expiry date | Nov 11, 2036 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB42D25/45
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The present invention relates to a method of manufacturing a substrate with an embedded, UV-visible pattern, wherein a liquid treatment composition comprising at least one acid is deposited onto a substrate, which comprises at least one optical brightener and optionally a filler, wherein the filler comprises 0 to 60 wt.-% of a salifiable alkaline or alkaline earth compound, based on the total weight of the substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.