Number | Date | Country | Kind |
---|---|---|---|
63-323939 | Dec 1988 | JPX | |
1-91267 | Oct 1989 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
4307899 | Hoppe | Dec 1981 | |
4451068 | Hall et al. | May 1984 | |
4456639 | Drower et al. | Jun 1984 | |
4469725 | Fischer et al. | Sep 1984 | |
4506916 | Kuhl | Mar 1985 | |
4856857 | Takeuchi et al. | Aug 1989 |
Number | Date | Country |
---|---|---|
2366658 | Apr 1978 | FRX |
Entry |
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Modern Plastics Encyclopedia, 1980-1981, pp. 454-455. |
Pulp and Pater Chemistry and Chemical Technology, Third Edition, vol. IV, Wiley & Sons, 1983, pp. 2516-2519. |