Number | Name | Date | Kind |
---|---|---|---|
2179796 | Morterud | Nov 1939 | |
2614923 | Tarkkonen | Feb 1947 | |
3881986 | Backlund | May 1975 | |
4248662 | Wallick | Feb 1981 | |
4578149 | Fagerlund | Mar 1986 | |
4690731 | Hartler et al. | Sep 1987 |
Number | Date | Country |
---|---|---|
2526060 | Nov 1983 | FRX |
8501305 | Mar 1985 | WOX |
Entry |
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Abstract Bulletin of the Institute of Paper Chemistry, vol. 53, No. 8, Feb. 1983, p. 978. |