Number | Name | Date | Kind |
---|---|---|---|
3354028 | Illingworth et al. | Nov 1967 | |
4518459 | Freis et al. | May 1985 | |
5102500 | Darlington | Apr 1992 | |
5302242 | Richmann et al. | Apr 1994 | |
5304316 | Urusshibata et al. | Apr 1994 | |
5417808 | Okamoto et al. | May 1995 | |
5460695 | Kato | Oct 1995 |
Entry |
---|
Escher Wyss News 1971, "Repulping of Printed Waste Paper by Floation of Printing Ink (Deinking)" by W. Matzke. |