Process of manufacturing authenticatable paper products
US6054021A · kind A · utility
74Cited by
16References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 20, 1999 |
| Grant date | Apr 25, 2000 |
| Priority date | — |
| Expiry date | Jan 20, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24901
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An authenticatable paper product is prepared by adding to a papermaking furnish fibers treated with from about 50-200 lb/ton of a fluorescent whitening agent (FWA). The paper made from the papermaking furnish will include fluorescent cellulosic fibers in an amount ranging from between 0.1-4.0 lb/ton to achieve FWA concentrations within the range of 1-20 ppm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.