Optical brightener for whitening paper
US11186569B2 · kind B2 · utility
0Cited by
2References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 14, 2018 |
| Grant date | Nov 30, 2021 |
| Priority date | — |
| Expiry date | Dec 14, 2038 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H21/32
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The invention relates to an optical brightener for whitening and brightening of paper, board, textiles and non-wovens, a process for manufacturing said optical brightener, the use of said brightener in paper making processes and a process for whitening paper.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.