Paper including a multitone-effect watermark, and a wire for manufacturing the paper
US6991846B2 · kind B2 · utility
16Cited by
17References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 19, 2001 |
| Grant date | Jan 31, 2006 |
| Priority date | — |
| Expiry date | Jan 19, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/249924
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Paper based on a fiber composition and having at least one multitone-effect watermark. When observed in transmitted light, the watermark has a set of pale zones arranged in the manner of a screened image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.