Number | Date | Country | Kind |
---|---|---|---|
2840147 | Sep 1978 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
3391190 | Kilsheimer et al. | Jul 1968 | |
3888971 | Scheibitz et al. | Jun 1975 | |
4143121 | Stenzel et al. | Mar 1979 |
Number | Date | Country |
---|---|---|
2549084 | May 1977 | DEX |
Entry |
---|
Gaylord, Polyethers, part I, Interscience Publishers, (1963), pp. 173-175. |