| Number | Date | Country | Kind |
|---|---|---|---|
| 4116111 | May 1991 | DEX |
| Number | Name | Date | Kind |
|---|---|---|---|
| 3841888 | Belde et al. | Oct 1974 | |
| 3947287 | Belde et al. | Mar 1976 | |
| 4297270 | Uhrig et al. | Oct 1981 | |
| 4312631 | Cuntze et al. | Jan 1982 | |
| 4769759 | McGough | Sep 1988 | |
| 4778919 | Topfl | Oct 1988 | |
| 4939238 | Uhrig et al. | Jul 1990 |
| Number | Date | Country |
|---|---|---|
| 0009648 | Apr 1980 | EPX |
| 2156603 | Feb 1977 | DEX |
| 2236906 | Dec 1979 | DEX |
| 3816126 | Nov 1989 | DEX |
| 59-71486 | Apr 1984 | JPX |
| 60-24229 | Feb 1985 | JPX |
| Entry |
|---|
| Ullmann's Encyclopedia of Industrial Chemistry, pp. 412-415. |
| J. Schreiber, Chemistry and Technology of synthetic Resinse, 5th Ed. 1943, p. 560. |
| Abstract of JP 58-191283 (Nikkakk) (Jun. 12, 1985). |