Number | Date | Country | Kind |
---|---|---|---|
3631838 | Sep 1986 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
3028360 | Brooks | Apr 1962 | |
3061580 | Erickson | Oct 1962 | |
3360589 | Raichle | Dec 1967 | |
3576909 | Schmidle | Apr 1971 | |
3721723 | Heidel | Mar 1973 | |
3784586 | Thomas | Jan 1974 |
Entry |
---|
Bjorksten J., Polyesters & Their Applications pp. 163-164, Reinhold Publishing Corp. N.Y. 1956. |