Composite paperboards and method of making composite paperboards
US7348067B1 · kind B1 · utility
16Cited by
18References
24Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 1, 2000 |
| Grant date | Mar 25, 2008 |
| Priority date | — |
| Expiry date | Feb 19, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31986
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A laminate composite sheet comprising a two-ply base layer comprised of a bottom ply and a top ply, wherein the bottom ply is comprised of unbleached cellulosic fibers and wherein the top ply is comprised of bleached or brightened cellulosic fibers and a further layer attached to the top ply with a layer of adhesive; said further layer having a top and a bottom surface, said further layer selected from the group consisting of paper or film; said layer of adhesive containing no pigment, and said top surface of said further layer having no coating.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.